Selwood D150 Instruction and safety manual

Selwood D150 Manual

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SELWOOD D150

Operating & Service Manual

The products of Selwood Limited, are designed,

developed and produced in the company's Chandler's

Ford factory Many features are covered by world-wide

patents. Product names such as Spate, Simplite and

Seltorque, are registered trade marks.

As all products are subject to continuous development,

the company reserves the right to alter the

specifications and information given in this manual

without prior notice.

Whilst every care has been taken in the preparation of

this publication the information it contains must not be

regarded as binding.

Amendments to this publication will only be issued to

cover those design changes which fundamentally alter

the build or operation and servicing procedures. They

will be distributed through the company's dealers and

agencies.

Published by Selwood Limited

Instructions for Ordering

Replacement Parts

1. Always quote the pump serial number located on

the plate fastened to the bearing and air pump

mechanism housing.

2. Always quote the part number(s) (ten digit) of the

component(s), NOT the item number(s).

3. Always quote the description of the component(s).

Items usually supplied together as sub-assemblies will

have the sub-assembly part number printed at the

bottom of the relevant page.

Additional copies of this manual may be ordered from

Selwood Limited, Pump Division, by quoting the

publication number shown on the outside back cover.

HEALTH AND SAFETY AT WORK

April 1975

As manufacturers of pumps and associated equipment

we wish to inform you that, in compliance with Section

6 of the Act, safety precautions should be taken with

our products.

We take every care to ensure as is reasonably

practicable that our products are safe and without risk

to health when properly used. Nevertheless,

appropriate health and safety precautions must be

taken, and in particular you are requested to have

special regard to the operational and safety

requirements leaflet P769 which accompanies each

pump on despatch from our premises.

Our products also conform to the EEC Machinery

Safety Directive and carry the C.E. mark.

CALIFORNIA USA

PROPOSITION 65 WARNING

Diesel engine exhaust and some of its

constituents are known to the State of

California to cause cancer, birth

defects, and other reproductive harm.

WARNING

Pumps and engines may be fitted with

seals or 'O' rings manufactured from

VITON or similar material.

When temperatures reach 400°C

(720°F) a corrosive acid is produced,

which cannot be removed from the skin.

If signs of material decomposition are

evident, or if in doubt,

always wear

disposable heavy-duty gloves.

Selwood D150 Manual

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SELWOOD D150

CONTENTS

Title Page

1 GENERAL INFORMATION..............................3

1.1 Installation........................................................3

1.2 Operation..........................................................3

1.3 Maintenance.....................................................3

1.4 I.C. Engines......................................................3

1.5 Fitting Instructions for Centaflex Couplings

(Diesel Engines)...............................................3

1.5.1 Preparation ofthe CentaflexCouplingfor

PumpRemoval..............................................4

1.5.2 CentaflexCoupling AssemblySequence....4

1.5.3 Replacementof the SteelHub and

RubberElement.............................................4

1.6 Electric Motors..................................................5

1.7 Fitting Instructions for Fenner Couplings

(Electric Motors) ...............................................5

1.8 Selwood D150 Standard Data..........................5

2 ROUTINE MAINTENANCE..............................5

3 LUBRICATION AND FASTENING TORQUES6

3.1 Pump Lubrication..............................................6

3.1.1 Commissioning Period..................................6

3.1.2 AfterCommissioning Period.........................6

3.1.3 Main PumpBearings.....................................6

3.2 Fastening Torques............................................7

4 CONDITIONS OF WARRANTY .......................7

5 MAJOR SERVICING........................................7

5.1 Air Pump Maintenance.....................................7

5.1.1 Deliveryand SuctionValves(B17)...............7

5.1.2 Actuator Valve (B18).....................................7

5.1.3 Actuator Seal (B15).......................................7

5.1.4 Actuator Neck Seal (B10).............................8

5.1.5 LinearBearing(A17)andSeals(A28

andA29).........................................................8

5.1.6 AirPump Mechanism....................................9

5.1.7 Eccentric Shaft (A04).....................................9

5.1.8 Lip Seal(A30)..............................................10

5.1.9 RollerBearings(A18A, A18B)....................10

5.1.10 Con Rod(A07)and Drive Rod (A10).........11

5.1.11 Drive Belt(A09)............................................11

5.1.12 Drive BeltTension.......................................11

5.1.13 AirPump Assembly.....................................11

5.2 Separator Maintenance..................................11

5.2.1 Float (E11)....................................................11

5.2.2 PeelValve (E21)..........................................12

5.2.3 Deposits ofSolids........................................12

5.3 Impeller, Mechanical Seal, Wear Plate and

Delivery Valve Maintenance...........................13

5.3.1 Impeller (C02)..............................................13

5.3.2 SettingImpeller Clearances........................13

5.3.3 MechanicalSeal (D14)................................14

5.3.4 FrontWearPlate(C03)...............................15

5.3.5 RearWearPlate(D06)................................15

5.3.6 DeliveryValve (C27)....................................16

5.4 Maintenance of Lip seals, Headland V Seal,

Bearings and Main shaft.................................17

5.4.1 Lip Seals(D13)............................................17

5.4.2 HeadlandVSeal (D12)...............................17

5.4.3 Bearings (D10)............................................18

5.4.4 Main Shaft (D04).........................................19

5.5 Chassis Maintenance.....................................19

5.6 Supersilent Canopy - Canopy Removal.........20

5.7 Supersilent Canopy -Fuel Tank Removal.......20

5.8 Supersilent Canopy – Fuel Tank Refitting......20

5.9 Supersilent Canopy – Canopy Refitting .........21

6 WORKSHOP TOOLS ....................................21

6.1 Care of Servicing Tools..................................21

6.2 Fitting of Actuator Neck Seal..........................22

6.3 Removal of Mechanical Seal Stationary

Seat and Joint Ring........................................22

6.4 Removal of Linear Bearing Seal Assembly....22

6.5 Fit Air Pump Pedestal with Seals to Air

Pump Bearing Housing..................................23

6.6 Remove Pedestal Bush..................................23

6.7 Fit New Pedestal Bush...................................23

6.8 Impeller Spacer Removal...............................23

6.9 Fit New Mechanical Seal Stationary Seat

and Joint Ring................................................24

7 FAULT FINDING GUIDE ...............................25

8 PARTS LIST..................................................29

8.1.1 AirPump DriveAssembly..........................29

8.1.2 AirPump Parts............................................31

8.2 Pump Body and Delivery Valve Parts ............33

8.3 Bearing Housing and Pedestal Assembly......35

8.4 Separator Parts..............................................39

8.5 Isuzu/4JB1 Pump Unit, Core Build on Skid

Chassis..........................................................41

8.6 Isuzu/4JB1 Pump Unit, Supersilent Canopy

Build on Skid Chassis ....................................43

8.7 Deutz/F3L1011 Pump Unit on 4-Wheel

Chassis..........................................................45

8.8 Deutz/F3L1011 Pump Unit on Skid Chassis..47

8.9 Deutz/F4L1011 Pump Unit on 4-Wheel

Chassis..........................................................49

8.10 Deutz/F4L1011 Pump Unit on Skid Chassis..51

8.11 4-Wheel Site Chassis (D150/Deutz

F4L1011)........................................................53

8.12 Fast Tow Kit, Open Set..................................55

8.13 Fast Tow 4-Wheel Chassis ............................57

8.14 4-Wheel Site Chassis (D150/Deutz

F3L1011)........................................................59

8.15 Detroit 3105 on 4-Wheel Site Chassis, Build

‘B’ 61

8.16 Detroit 2105 on Skid Chassis, Build ‘B’..........63

9 WIRING DIAGRAMS .....................................64

9.1 Isuzu 4JG1 Engine/Canopy ...........................64

9.2 Fast Tow Trailer Lighting Circuit.....................65

9.3 Deutz – Wiring Diagram.................................66

9.4 Detroit – Wiring Diagram................................67

Selwood D150 Manual

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1 GENERAL INFORMATION

1.1 Installation

1. The pump unit and its associated baseplate or

trolley mounting should be positioned on a firm

horizontal platform, and in the case of portable

units restrained from accidental movement.

2. If the pump is fitted with push-on type suction and

delivery spigots the hoses must be firmly secured

on these spigots with heavy duty clamps or clips

capable of withstanding the system operating

pressure.

3. The integrity of the hose clamping arrangements

should be checked at regular daily intervals in the

case of static installations or whenever the pump

is repositioned in the case of portable units.

4. Similar precautions should be taken with clamps

securing multiple lengths of hose on installation

where long delivery and suction lines are involved.

5. Delivery hose and any associated pipework

should be capable of withstanding the maximum

system operating pressure. Suction hose should

be of the non-collapsible variety.

1.2 Operation

1. The pump should only be operated within the

speed and pressure limits detailed in the operating

handbook for the model in question.

2. If there is a danger of freezing, the fluid normally

retained within the pump between operating

cycles should be drained off through the drain taps

provided.

3. Where protective caps are used to prevent

damage to the suction and delivery spigots during

storage or in transit they must be removed before

the pump is started up.

1.3 Maintenance

1. Inspection and maintenance procedures are

detailed in the operating and servicing manual for

the model in question.

2. Replacement parts. Only the manufacturers or

factory approved components should be used as

replacement parts and where necessary they

should be fitted with the assistance of the special

purpose tools indicated in the operating and

servicing manual.

3. All maintenance work must be carried out with the

pump and engine/motor stationary.

1.4 I.C. Engines

1. Where I.C. engines are used to power the pump

they have been mounted in accordance with the

engine manufacturers recommendations and

adequate guarding provided between the pump

and engine.

2. Exhaust and Exhaust Pipes. If there is a risk of

accidental contact by operators, the exhaust

system should be lagged or screened and the

outlet directed away from operators or other

persons likely to be nearby. Direct contact with

flammable materials of all types must be avoided.

The importance of adequate ventilation to ensure

removal of exhaust fumes when engines are

operated in enclosed or covered accommodation

cannot be over-stressed. Engines should not be

run in hazardous explosive atmospheres.

3. Access and Operation. Ensure that the operator

can start, control and stop the engine easily by

making all controls readily accessible. Fit remote

controls if access is difficult. Follow the

instructions laid down in the Engine

Manufacturer's Operators Handbook for starting,

operating and stopping procedures.

4. Fuel. In addition to the fire hazard associated with

fuel and lubricating oils, preventative action is

necessary with respect to leakage, contamination

and bodily contact.

5. Electrical Connections. It is essential that earth

terminals are connected with an absolutely sound

earth point and care should be taken to ensure

that the correct sized conductors are selected to

suit the current and distance to be carried.

1.5 Fitting Instructions for

Centaflex Couplings (Diesel

Engines)

IMPORTANT NOTES – OBSERVE STRICTLY:

The Centaflex Coupling Assembly is supplied in a pre-

assembled state and must be fitted to the pump drive

shaft and engine flywheel in this state. On no account

should any of the components that make up the

coupling assembly be dismantled unless it has become

necessary to service one of the component parts.

Typically, the most likely component to require

replacement will be the rubber element and servicing

of this item is explained in Section 1.5.3 below.

The coupling assembly consists of a central steel hub

whose outside diameter locates within a bore of a

rubber element and is secured within the element

using three cap screws that pass radially through its

outer diameter. In turn, the rubber element locates

onto three horizontal pins, equally disposed on a PCD

and each secured to the face of a steel adaptor plate

with cap screws. The cap screws securing both the

central steel hub and the horizontal pins are torque

tightened to the values shown in the table in Section

1.5.2 below.

The rubber element itself is free to slide on the

horizontal pins. It is therefore unnecessary to remove

the cap screws that secure the pins unless the pins

themselves have become damaged.

Selwood D150 Manual

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1.5.1 Preparation of the Centaflex Coupling

for Pump Removal

NOTE: Before commencing, mark the position of the

coupling assembly on the pump drive shaft. Pay

particular attention to the size of the gap between the

back of the rubber element and the face of the steel

adaptor plate. This gap has been factory set and is

maintained when the setscrew in the steel hub is

locked in position.

1. In order to allow the pump drive shaft to be

withdrawn from the steel hub of the coupling, it will

be necessary to loosen the setscrew located in the

outside radius of the steel hub just in front of the

rubber element. The setscrew clamps the

coupling assembly onto the top of the pump drive

shaft key and it is not necessary to completely

remove this screw.

2. Once the setscrew is loose the pump drive shaft is

free to be withdrawn from the hub of the coupling.

Note too that when the setscrew is loose the

coupling assembly is free to slide in either

direction onto the pump drive shaft or onto the

horizontal pins.

1.5.2 Centaflex Coupling Assembly Sequence

1. The radial and axial screws connecting the rubber

element to the hubs must all be tightened to the

torque given in the table below, using a torque

wrench.

Tightening Torque

Centaflex

Size Screw

Size Nm mKp

16/22 M12 85 8,5

25/28 M14 140 14

30 M16 220 22

2. Tightening with a torque wrench is particularly

important. Tightening by feel will not do as

experience has proved the tightening torques in

such cases are far too low. Tightening torques

which are too low will inevitably lead to slackening

of the screws in service and consequently to the

destruction of the coupling.

3. Ensure that on tightening the screws, the

aluminium bushes in the rubber part are not

twisted at the same time, but sit straight. In order

to reduce friction between the screw head and the

aluminium part, a small amount of grease should

be applied under the head of the screw before

fitting.

4. If necessary, use a suitable tool for applying

counter pressure on the element to prevent

twisting of the rubber part during tightening of the

screws. This is particularly important with radial

screws, otherwise the cylindrical faces between

the aluminium insert and the hub will not engage

on the full area, but only on two corners. This will

inevitably lead to slackening of the screws and

subsequent destruction of the coupling. If the

coupling is supplied in a pre-assembled state do

not dismantle it, but fit it in this condition.

1.5.3 Replacement of the Steel Hub and

Rubber Element

NOTE: Once the Centaflex coupling has been

prepared in accordance with Section 1.5.1 above, it is

free to be removed from the horizontal pins on the face

of the adaptor plate.

1. If it becomes necessary to replace either the steel

hub or rubber element, the three radial caps

screws must be removed in order to separate the

two components. When removing these cap

screws it is recommended that the coupling

assembly remain on the horizontal pins for ease of

their removal.

2. Once the three radial screws are removed, the

steel hub can be separated from the rubber

element. Also at this stage the rubber element

can be removed from the horizontal pins of the

adaptor plate.

3. Replace the rubber element and/or steel hub as

necessary to refurbish the assembly.

4. Fit the rubber element onto the horizontal pins of

the adaptor plate.

5. Insert the steel hub into the centre of the rubber

element and align the radial mounting holes with

tapped holes in the hub.

6. Fit the three radial cap screws in accordance with

the instructions at Section 1.5.2.

7. The coupling assembly is now prepared for the

replacement of the pump.

Selwood D150 Manual

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8. Once the pump drive shaft is engaged in the

coupling hub bore, set the position of the coupling

assembly to that previously marked when Section

1.5.1 was performed.

9. Tighten the setscrew that locks the steel hub of

the coupling assembly to the pumps drive shaft

key.

1.6 Electric Motors

1. All electrical connections should be made through

adequately rated conductors and starters.

Isolators and other associated switchgear should

be of adequate capacity for the imposed power

loadings. All electrical equipment should be

adequately earthed.

2. Isolate the power supply before carrying out any

commissioning, servicing or maintenance work on

the pump or electric motor.

3. Where electric motors are to be operated in

hazardous or explosive atmospheres they should

be of the flameproof enclosure type appropriate to

that atmosphere.

You are requested to take such steps as are

necessary to ensure that this information is made

available to all those involved with the use of our

products. This information must be made available not

only to your own employees at their workplace, but

also to anyone who may purchase or otherwise

acquire (hire) such products for use in his own

workplace.

It is our intention constantly to review our obligations

under the Act and we will be issuing from time to time

further information with regard to the safe application,

use, inspections, and service associated with our

products.

1.7 Fitting Instructions for Fenner

Couplings (Electric Motors)

1. Adjust position of pump on chassis until the inside

faces of the coupling flanges are parallel to each

other. The distance between the faces should

measure from 24 to 29mm (15/16” to 1 1/8”).

Whilst adjusting the pump’s position, it is also

necessary to achieve alignment of the shaft

centre-lines within 1.5mm (1/16”) of each other by

laying a straight edge cross the two flanges at

several positions around their circumferences.

Fully tighten the nuts immediately the coupling

flanges are correctly aligned. Recheck alignment

after tightening.

2. The flexible coupling assembly should now be

completed. Open-out the tyre and fit over the

coupling flanges ensuring the tyre beads seat

properly on the flanges. To ensure proper

seating, it may be necessary to strike the outside

diameter of the tyre with a small mallet. When

seated there should be a gap between the ends of

the tyre of about 1/8” (3mm). Tighten clamping

ring screws in flange alternately and evenly

(approximately half a turn per screw) working

round the flange until 17lbf ft (2.35kgf m) torque is

achieved.

1.8 Selwood D150 Standard Data

Capacity (max) 380M

89,588 UK gal/h

Delivery Head (max) 41m

134.5ft

Self Priming Lift (max) 8.8m H

29ft H

Solids Size (max) 45mm

1.75in

Air Handling Capacity:

Single 24l/s

Prime 50ft

/min

Twin 48l/s

Prime 100ft

/min

Pump Speed 2000rpm Max

Port Size BS.4504 Table 6 150mm

6in

2 ROUTINE MAINTENANCE

Lack of routine maintenance is the most frequent

reason for the breakdown of pumps. We earnestly

advise users to ensure that at least the following

actions are taken.

1. Check these three oil levels daily:

a) Engine oil.

b) Air pump bearing housing oil.

c) Flushing chamber oil.

2. Always drain water from the pump in cold weather

when it is not running. Drain:

a) Pump body.

b) Delivery valve chamber.

c) Both sides of air pump (4 drain taps if twin

prime).

3. Do NOT run the pump if significant quantities of

water escape through the exhaust valve of the air

pump. This pump is designed to handle moisture-

laden air, but not to pump a high percentage of

water. Refer to servicing instructions for further

advice.

4. Do NOT run the pump if malfunction is suspected

in any of its parts. In particular, it must

immediately be serviced if the level of oil in the

flushing chamber varies daily, or if the oil becomes

contaminated with the pumped fluid.

5. A hose strainer should always be fitted to the free

end of the suction line if there is a possibility of

oversized solids entering the pump. The

dimensions of rocks, pebbles, etc. must not

exceed 45mm. Larger soft solids, however, of the

type found in abattoir duties, for example, will pass

freely through the pump. Refer to Selwood Ltd if

in need of advice in this connection.

6. As loss of prime and indeed loss of on-stream

performance can easily arise as the result of

leaking pipework joints, we recommend that all

line fittings associated with the pump should be

checked periodically for air-tightness.

Selwood D150 Manual

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7. It is most Important to use the correct fuel oil in the

engine. Make sure that it is appropriate for the

weather conditions (summer or winter) and that it

is clean and free from water and foreign matter.

Unsatisfactory running performance, excessive

wear and damage can all result from the use of an

Incorrect or contaminated fuel.

8. Periodically check the tension of all nuts and bolts,

especially those securing the engine and pump to

the chassis.

9. Pump servicing must always be carried out in

accordance with the instructions given in this

manual. Only components supplied and approved

by Selwood Ltd should be used. It is advisable to

hold a small stock of spare parts to cover

breakdown circumstances. The Company will be

pleased to give advice in this connection.

10. Engine servicing must always be carried out in

accordance with the instructions given in the

manufacturer's manual. Do not hesitate to contact

Selwood Ltd if the need for further advice arises.

11. Please contact Selwood Ltd in the event of

experiencing difficulty when servicing. The

company will also be very pleased to give advice

in connection with the machine's installation,

operation and maintenance.

12. All practical work must be carried out in

compliance with the Health and Safety at Work

Act, 1975. Always start the engine in accordance

with the manufacturer's instructions.

NOTE: If the above advice is followed, the likelihood

of an expensive break down will be greatly diminished.

The pump should give a long and trouble free life if

these measures are put into effect.

3 LUBRICATION AND

FASTENING TORQUES

3.1 Pump Lubrication

It is most important to maintain the correct levels of oil

in the flushing chamber and bearing housing, and to

ensure that the oil is of the recommended quality and

is free from contamination. Selwood recommend the

use of the following BP/Castrol products, which should

be applied as per the following table. In some

territories, the following grades may be known under

differing trade names, please contact Selwood if

problems occur in identifying the correct product.

COMPONENT BP GRADE

ENGINES

Vanellus C5 Global

Bearing Housing

BP Energrease LS-EP2

Flushing Chamber

C5 Global

Actuator Bore

Castrol Rustilo 431

Air Pump Bearing Hsg

C5 Global

Paper Gaskets

BP Energrease LS-EP2

Axle Shafts

BP Energrease LS-EP2

Axle Pivot Assembly

BP Energrease LS-EP2

M10 Screws - Port Plate

to Diffuser

Castrol Optimoly Paste

DRAIN INTERVAL

COMPARTMENT CHANGE

OIL &

FILTERS

CHECK &

TOP UP

Engine Sump ISUZU 250 Hours Daily

Engine Sump DETROIT 250 Hours Daily

Engine Sump DEUTZ 750 Hours Daily

Air Pump Bearing

Housing 750 Hours Daily

Flushing Chamber 750 Hours

Actuator Bore

Impeller Bore

Shaft Sleeve Bore

ASSEMBLY

Paper Gaskets

Axle Shafts

Axle Pivot Assembly

ASSEMBLY 6 - 12

M10 Screws - Port Plate

to Diffuser ON

ASSEMBLY

3.1.1 Commissioning Period

Drain both pump chambers and engine within 50-100

running hours of commissioning either a new, or rebuilt

pump, and refill with new oil to dipsticks level mark.

Air Pump bearing housing 1.2litres

Mechanical seal chamber 1.8litres

and Oil Reservoir

Engine sump – Refer to Engine Instruction Book.

3.1.2 After Commissioning Period

If the pump is driven by a diesel engine, the oil in both

pump chambers should be drained and renewed

simultaneously with the time schedule laid down by the

engine manufacturer. Under no circumstances should

the period for the pump exceed 750 running hours.

3.1.3 Main Pump Bearings

1. Run pump to warm up bearings and keep running.

2. Remove 1/8" BSP vent plugs (D22) from bearing

housing.

3. Charge each grease point with 20 grams of BP

Energrease LS-EP2.

4. Leave pump running for about 30 minutes to allow

any excess grease to escape through vents.

5. Replace 1/8" BSP plugs (D22).

NOTE: Do not exceed recommended quantities of

grease, as overheating will occur leading to

premature bearing failure.

If excess grease should cause overheating it will

be necessary to remove the excess by first

removing the bearing covers (D02), (D03), see

General Maintenance.

Under normal conditions the bearing housing

temperature should be sufficient to maintain hand

contact.

Selwood D150 Manual

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3.2 Fastening Torques

Failure to tighten threaded fasteners correctly can

easily lead to assembly breakdown. It is very

important, therefore, when carrying out the instructions

in this manual, to achieve the appropriate tensioning

torques. In some cases, specific requirements are

described in the instructions, which must always be

implemented. The following torques, in particular,

must be applied.

Item Torque

Nm lbf-ft

M12 Actuator cap screw (B19) 81.3 60

M12 Air pump inner body to

pedestal capscrew (B11) 95.0 70

M16 Impeller to shaft capscrew

(C28) 122.0 90

3. Torque all fasteners as follows unless

otherwise stated.

Diameter Torque Nm lbf-ft

M6 11.7 8.6

M8 28 20.7

M10 56 41.3

M12 98 72.3

M16 244 180

4 CONDITIONS OF

WARRANTY

For a period of twelve months from delivery of any

Selwood pump to the first user thereof, or eighteen

months from the despatch of any such pump by

Selwood, whichsoever period is the shorter, Selwood

will repair or, at its option, replace any component

which in the opinion of Selwood has failed due to

defective workmanship or materials.

a) For full terms and conditions contact Selwood Ltd.

5 MAJOR SERVICING

5.1 Air Pump Maintenance

5.1.1 Delivery and Suction Valves (B17)

Failure of the pump set to prime quickly or to discharge

the expected volume of air, may simply be due to faulty

valve operation.

To inspect and service, proceed as follows:

1. Remove air hose (single prime item (B01) from

suction valve box (B07), after loosening relevant

hose clips (B09).

2. Note the orientation of the suction valve box (B07)

and exhaust cover (B16) before commencing.

Remove exhaust cover (B16) and suction valve

box (B07) by releasing nuts (B33) and spring

washers (B34).

NOTE: The above actions allow the condition of the

two valve rubbers (B17) to be checked. Do NOT

attempt to remove valve studs (B22). If valve rubbers

are damaged, replace with new components. Pull old

valves off stud heads, and discard.

3. Check and, if necessary, clean valve seats in

outer pump body (B13) and valve box (B07).

Smear heads and grooves of studs with soft soap

and push on new valves ensuring that they seat

correctly.

4. The valve assemblies can now be replaced by

reversing Instructions 1 and 2 of this procedure. It

is advisable to fit new gaskets (B21).

5.1.2 Actuator Valve (B18)

Another reason for the pump set failing to prime

efficiently or to handle the expected volume of air,

could be malfunction of the actuator valve (B18).

To inspect and service, proceed as follows:

1. Remove nuts (B28), spring washers (B29),

washers (B30) and screws (B27), allowing outer

pump body (B13) to be removed complete with

attached delivery valve assembly. The actuator

valve (B18) may now be examined. If it fails to

seat efficiently on actuator (B14) or is in any way

damaged, it should be pulled off the actuator nut

and discarded.

2. Whilst the actuator valve (B18) is removed, it is

advisable to examine the condition of the valve

seat in the actuator (B14), and also to check the

security of the actuator screw (B19). This should

be checked and tightened to 60lbf ft (8.3kgf m)

torque.

3. To replace actuator valve (B18):

a) Smear soft soap on the conical end and

groove of actuator screw (B19).

b) Ease new valve rubber into position ensuring

that it seats correctly.

NOTE: It is advisable to examine the condition of

actuator seal (B15) whilst it is exposed. Refer to

Section 5.1.3 Actuator Seal (B15) for servicing

instructions.

4. To replace outer pump body assembly, fit and

evenly tighten screws (B27), washers (B30),

spring washers (B29) and nuts (B28), by

sequentially turning each screw a small amount

until they are all fully tensioned.

NOTE: It is important that the outer diameter of the

actuator seal (B15) should be evenly clamped.

5.1.3 Actuator Seal (B15)

A further reason for the pump set failing to prime

efficiently or to handle the expected volume of air,

could be a faulty actuator seal (B15).

To inspect and service, proceed as follows:

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1. Remove outer pump body (B13) complete with

delivery valve assembly. Remove actuator screw

(B19).

2. Set actuator to top dead centre (maximum

distance from inner pump body), by rotating

engine shaft with starting handle. Using a tool that

will not cut the rubber (such as a blunt

screwdriver) and a lubricant (soap solution),

remove actuator seal (B15) by prising it from the

inner pump body (B12).

3. Remove actuator (B14) complete with seal from

drive rod (A10).

4. To renew actuator seal (B15):

a) Remove the failed component from the

actuator.

b) Insert firstly one side and then the other into

the actuator groove, using a blunt tool that will

not cut the rubber.

NOTES: The seal is handed and will not enter the

inner pump body (B12) if fitted the wrong way round.

The correct assembly position for actuator seal (B15)

is with the smaller diameter of its conical outer surface

towards the inner pump body (B12). It will be seen

that the housing in the body is tapered in the same

direction as the external surface of the seal.

5. At this stage it is advisable to examine the

condition of actuator neck seal (B10). This

component should be replaced if any splits are

evident on its visible surface. Refer to Section

5.1.4 Actuator Neck Seal (B10).

6. Smear soft soap on the outside section of new

actuator seal (B15). Lightly grease actuator bore.

Position actuator/seal assembly on drive rod

(A10), locate actuator screw (B19) and tighten to

60lb ft (8.3kgf m) torque.

7. Replace actuator valve if removed (B18) first

smearing soft soap on the conical end and groove

of actuator screw (B19). The new valve should be

eased into position by hand.

8. Before fitting outer pump body (B13), reciprocate

the actuator by fitting and rotating the engine's

starting handle about ten times to encourage

centralisation of the connecting rod bearings.

During this procedure, the actuator seal (B15) is

likely to rotate slightly in the inner pump body

(B12). Stop shaft rotation when actuator is at

bottom dead centre (minimum distance from inner

pump body).

9. Seat outside section of actuator seal in inner

pump body recess by gently tapping with a non-

metallic mallet.

10. Replace outer pump body assembly, and fit and

evenly tighten screws (B27) washers (B30) spring

washers (B29) and nuts (B28), by sequentially

turning each screw a small amount until they are

all fully tightened. It is important that the outside

diameter of the actuator seal (B15) should be

clamped evenly.

5.1.4 Actuator Neck Seal (B10)

Another reason for the pump set failing to prime

efficiently or to handle the expected volume of air,

could be failure of the actuator neck seal (B10).

To investigate and service, proceed as follows:

1. Remove outer pump body (B13) complete with

delivery valve assembly, and actuator (B14) with

actuator seal (B15) as directed in Section 5.1.3

Actuator Seal (B15) Instructions 1 and 2.

2. Release hose clip (B09) allowing air hose to be

disconnected from suction valve box (B07).

Screws (B11) should then be removed, leaving

washers (B31) in inner pump body (B12).

3. The inner pump body can now be pulled by hand

from the air pump bearing housing, if necessary

twisting to overcome any tendency of the seal

(B10) to stick to drive rod (A10). Remove and

discard failed seal.

4. Smear new actuator neck seal (B10) with soft

soap to assist fitting, position in inner pump body

(B12) and push both components over drive rod

(A10) using assembly tool (Part No. 0015102000)

smeared with soft soap. Check that washers

(B31) are in place, and fit and fully tighten screws

(B11). The heads of these screws should be fully

contained within the recesses in the inner pump

body.

5. Reassemble remaining components in

accordance with Section 5.1.3 Actuator Seal (B15)

Instructions 6 to 10, inclusively.

5.1.5 Linear Bearing (A17) and Seals (A28

and A29)

If oil leaks from ports in air pump pedestal (A02) it is

probable that seals (A28/A29) are excessively worn.

Such a condition may also indicate that pedestal bush

(A17) should be replaced.

To inspect and service, proceed as follows:

1. Drain oil from air pump bearing housing by

removing drain plug (A33) and sealing washer

(A34).

2. Remove air pump components in accordance with

Section 5.1.3 Actuator Seal (B15) Instructions 1

and 2, and to Section 5.1.4 Actuator Neck Seal

(B10) Instructions 2 and 3.

3. Being careful not to damage the flat sealing faces

of air pump pedestal (A02), carefully withdraw

pedestal complete with its bearing and sealing

components from the air pump bearing housing

(A01) and drive rod (A10).

4. Carefully remove circlip (A24) and withdraw seal

carrier (A26) complete with seal (A28). Remove

seal (A29) from housing. Use bearing drift,

Service Tool 0015168000 to push out linear

bearing (A17). Examine condition of wiper and

distributor seals together with bearing. If either

are worn or damaged, we recommend that new

seals (A28 and A29) and bearing (A17) should be

ordered and fitted in accordance with the following

instructions.

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5. To replace linear bearing (A17) carefully remove

circlip (A24) allowing seal components to be

pushed from pedestal with blunt punch or drift

from bearing end. The drive rod bearing can now

be removed using bearing drift (Part No.

0015168000) and the new component pressed

into position so that one face is flush with base of

bearing location within the pedestal.

6. Ensure that seal components are assembled in

accordance with the following instructions.

a) The wiper seal (A28) is first assembled to the

seal carrier (A24) using wiper seal insertion

tool (Part No. 0010103000) with wiper lip

uppermost.

b) Then lubricate seal housing and press in

internal distributor seal (A29) with lip nearest

bearing. Push into place with seal carrier

(A24) together with wiper seal (A28) and the

whole pressed into place with the wiper seal

insertion tool (Part No. 0010103000). Care

must be exercised when replacing circlip

(A24) to ensure that the lip of the wiper seal

(A28) is not damaged by the hand tools used.

Refer to Section 6.4.

7. Before replacing air pump pedestal assembly,

check condition of drive rod, particularly if new

bush (A17) has been fitted. If surface is

significantly worn, the drive rod should be

replaced in accordance with instructions given in

Section 5.1.7.

8. Assembly tool (Part No. 0015101000) must be

used when replacing bearing/seal housing

assembly to ensure that the wiping edges of the

seals (A28 and A29) are not damaged. The drive

rod must be smeared with clean oil to assist this

procedure. See Section 6.5. Gasket (A12) must

be renewed. Always use a component supplied

by Selwood Ltd. Ensure that ports in the air pump

pedestal (A02) are in the 3 and 9 o'clock positions.

9. Reassemble remaining pump components in

accordance with Section 5.1.4 Actuator Neck Seal

(B10) Instruction 4 and 5.1.3 Actuator Seal (B15)

Instructions 6 to 10, inclusively.

10. Replace drain plug (A33) together with sealing

washer (A34) and refill bearing housing (A01) with

clean oil to max. level on dipstick plug (A35).

Refer to Section 3.1 Pump Lubrication for details

of the oil required for the air pump bearing

housing.

5.1.6 Air Pump Mechanism

Should actuator (B14) fail to reciprocate when the

pump is running, or if other abnormal conditions are

suspected, the air pump mechanism should be

immediately inspected to minimise the risk of

consequential damage.

Proceed as follows:

1. Drain oil from air pump bearing housing and

flushing chamber by removing drain plug (A33)

and sealing washer (A34).

2. Remove air pump components in accordance with

Section 5.1.3 Actuator Seal (B15) and Section

5.1.4 Actuator Neck Seal (B10) Instructions 2 and

3 (discard actuator neck seal if it has failed).

3. Being careful not to damage the flat sealing faces

of pedestal (A02) carefully withdraw pedestal

complete with bearing and sealing components

from air pump bearing housing (A01) and drive rod

(A10).

4. Carry out Section 5.1.7 Eccentric Shaft (A04)

removal Instructions 8 to 18, inclusively.

5. Carefully remove drive rod (A10) and connecting

rod (A07). If second priming pump is fitted, repeat

these operations, ensuring that the connecting

rod, fulcrum pin and drive rod components are

kept as sets, and can later be reassembled in their

original positions.

6. Examine condition of all components and renew

failed or significantly worn items. A replacement

connecting rod, complete with bushes, should be

ordered against sub-assembly (Part No.

1589102000).

7. To rebuild mechanism carry out Section 5.1.7

Eccentric Shaft (A04) fitting Instructions 1 to 14,

inclusively.

5.1.7 Eccentric Shaft (A04)

Removal

1. Remove air pump components in accordance with

Section 5.1.3 Actuator Seal (B15) instructions 1

and 2 and to Section 5.1.4 Actuator Neck Seal

(B10) instructions 2 and 3.

2. Remove belt guard and pulley (A08) by releasing

taper lock (A13).

3. Remove key (A37).

4. Remove 3/8" BSP drain plug (A33) and sealing

washer (A34); drain and discard oil.

5. Remove four M8 hexagon socket head capscrews

(A39) and spring washers (A43).

6. Use two M8 tapped holes in air pump pedestal

(A02) flange to jack off dowels (A36).

7. Carefully remove the air pump pedestal (A02)

complete with seals and linear bearing; remove

and discard gasket (A12). Take special care not

to damage the drive rod surface.

8. Remove four M6 hexagon head screws (A40) and

spring washers (A44) from bearing cover (A05).

9. Remove bearing cover (A05) and gasket (A11);

discard gasket.

10. Bend back tabs (A19) and remove bearing locknut

(A20); use 'C' spanner 1590180000.

11. Remove tab washer (A19).

12. Remove four M6 hexagon head screws (A40) and

spring washers (A44) from bearing cover (A06).

13. Remove bearing cover (A06) complete with lip

seal (A30).

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14. Remove gasket (A11) and discard.

15. Carefully pull shaft (A04) from housing complete

with circlip (A22), washer (A21) and inner race of

bearing (A18B).

NOTE: It may assist dismantling if panel (A03) is

removed. Take great care not to damage shaft,

drive rod and bearings.

16. Remove con-rod/drive rod assembly and inspect

bearing bushes.

17. Remove circlip (A22) and washer (A21).

18. Use a bearing puller to remove inner race of

bearing (A18B) from shaft.

Fitting

1. Apply a few drops of Loctite 641 to the shaft (A04)

and slide inner race of bearing (A18B) onto its

seat.

2. Fit washer (A21) and circlip (A22).

3. Carefully slide shaft and bearing assembly into

housing through the con-rod bearing bush (A15)

and engage shaft end in bearing (A18A).

4. Fit tab washer (A19) engaging locating tab in shaft

groove.

5. Fit bearing locknut (A20) and tighten with 'C'

spanner; bend lock washer tab into groove.

6. Fit bearing cover (A05) and new gasket (A11);

secure with four M6 hexagon head screws (A40)

and spring washers (A44).

7. Fit bearing cover (A06) complete with lip seal

(A30) and new gasket (A11); secure with four M6

hexagon head screws (A40) and spring washers

(A44).

8. Fit new gasket (A12).

9. Fit Service Tool 0015101000 to drive rod (A10),

and carefully lower the air pump pedestal (A02),

complete with seals and linear bearing, over.

Locate pedestal flange over dowels (A36) and

secure with four M8 hexagon socket head

capscrews (A39) and spring washers (A43).

10. Reassemble remaining air pump components in

accordance with Section 5.1.4 Actuator Neck Seal

(B10) instruction 4 and Section 5.1.3 Actuator

Seal (B15) instructions 6 to 10 inclusively.

11. Refit key (A37), pulley (A08), taper lock bush

(A13), and belt (A09).

12. Align pulley (A08) with pulley (D11) and tighten

taper lock.

13. Refit belt guard.

14. Refill bearing housing with 10W30 oil.

5.1.8 Lip Seal (A30)

Removal

1. Remove drain plug (A33) and sealing washer

(A34); drain and discard oil.

2. Remove belt guard.

3. Release taper lock bush (A13) and remove with

pulley (A08); remove key (A37).

4. Remove four M6 hexagon head screws (A40) and

spring washers (A44) from bearing cover (A06).

5. Remove bearing cover (A06) complete with lip

seal (A30).

6. Remove and discard gasket (A11).

7. Pull lip seal (A30) from housing (A06) and discard.

Fitting

1. Clean and lubricate seal housing. Press in lip seal

(A30) fully against abutment; lip nearest the

bearing.

2. Lubricate shaft sealing surface.

3. Fit new gasket (A11) on bearing cover (A06) and

slide assembly over shaft. Engage spigot and

align screw holes.

4. Secure to bearing housing (A01) with four M6

hexagon head screws (A40) and spring washers

(A44).

5. Refit key (A37), taper lock bush (A13), pulley

(A08) and belt (A09).

6. Align pulley (A08) with pulley (D11) and tighten

taper lock bush.

7. Replace belt guard.

8. Fill bearing housing with 10W30 oil.

5.1.9 Roller Bearings (A18A, A18B)

To investigate and service, proceed as follows:

1. Remove air pump components in accordance with

Section 5.1.3 Actuator Seal (B15) instructions 1

and 2, and Section 5.1.4 Actuator Neck Seal (B10)

instructions 2 and 3.

2. Remove air pump drive components in

accordance with Section 5.1.7 Eccentric Shaft

(A04) removal instructions 1 to 18 inclusively.

3. Examine bearings (A18A, A18B) for excessive

wear and replace both if either or both are worn.

4. Fit new bearings (A18A, A18B) to drive shaft

(A04) and refit into bearing housing in accordance

with Section 5.1.7 Eccentric Shaft (A04) fitting

instructions 1 to 14 inclusively.

5. Reassemble remaining air pump components in

accordance with Section 5.1.4 Actuator Neck Seal

(B10) instruction 4 and Section 5.1.3 Actuator

Seal (B15) instructions 6 to 10 inclusively.

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5.1.10 Con Rod (A07) and Drive Rod (A10)

It is recommended that these items be purchased

ready assembled with bearings finish machined and

reamed:

•Con-rod assembly - Part No. 1589102000,

consisting of air pump connecting rod (A07), two

small end bushes (A14) and a large end bush

(A15)

•Drive rod assembly - Part No. 1589103000,

consisting of air pump drive rod (A10) and drive

rod bush (A16).

To investigate and service use fitting and removal

procedures Section 5.1.9 Roller Bearings (A18A,

A18B).

5.1.11 Drive Belt (A09)

Another reason for the pump set failing to prime

efficiently, or handle the expected volume of air could

be the poor condition of the air pump drive belt (A09)

or pulleys (A08 and A47).

To investigate and service proceed as follows:

1. Remove air pump pulley guard.

2. Remove one half of coupling guard.

3. Remove rubber coupling element.

4. Release taper lock bush on the air pump shaft

(A13).

5. Carefully remove belt (A09) and examine for tooth

damage and cracking. If faulty replace with new

belt.

6. Check pulleys (A08 and A47) for damage.

Change if required in accordance with pulley

manufacturers instructions.

7. Thread the toothed belt (A09) between the

flywheel plate and pump shaft end and over the

pulleys (A08) and (A47).

8. Line up air pump pulley (A08) with main shaft

pulley (A47) and tighten the taper lock bush (A13).

9. Check belt tension and adjust if necessary. See

Section 5.1.12.

10. Reassemble coupling and guards.

5.1.12 Drive Belt Tension

Required Tension

A load of 13.4N (3.0Ibf) applied across the belt at mid

pan should give a deflection at that point of 3mm

0.12ins). This may be measured using a spring

balance, bar, and dial indicator, or Service Tool

590105000.

Adjustment

The belt tension is set by varying the distance between

pump and air-pump shaft centres using shims (A25A

and A25B). Jacking screw holes are provided in the

pump bearing housing flanges to raise and lower the

air pump during adjustment.

5.1.13 Air Pump Assembly

Sometimes it is more practical to service the air pump

away from the main pump assembly.

To allow remote service proceed as follows:

1. Remove drive belt as directed in Section 5.1.11

Drive Belt (A09), instructions 1 to 5.

2. Disconnect separator hose (B01) and silencer

hose.

3. Remove four M12 hexagon socket capscrews

(A38) and spring washers (A42).

4. Insert two screws in the tapped holes midway

along the pump bearing housing flanges (D01)

and jack the air pump assembly off the dowels

(D28).

5. Retain shims (A25A and A25B) and note

positions.

6. Carryout the relevant servicing required.

7. Replace shims (A25A and A25B) or reselect new

shims by following the adjustment procedure

Section 5.1.12 Drive Belt Tension.

8. Fit air pump bearing housing flange (A01) over

dowels (D28), fit four spring washers (A42) and

four M12 hexagon socket capscrews (A38). Pull

the air pump down evenly.

9. Reassemble belt (A09) as Section 5.1.11.

10. Check belt tension as Section 5.1.12.

11. Refit guards and air pump hoses.

5.2 Separator Maintenance

5.2.1 Float (E11)

If water in significant quantities continuously passes

through the exhaust valve (B17) of the air pump, it is

probable that the float (E11) is in need of replacement.

To inspect and service, proceed as follows:

1. Disconnect air hose (E35) by loosening hose clip

(E36).

2. Remove nuts (E38) and washers (E39) and lift off

separator cap (E01) complete with peel

valve/upper diffuser assembly (E01) to (E21),

inclusively.

3. Examine condition of float (E11) and replace with

new component if punctured or significantly worn.

4. Check condition of peel valve rubber (E21) and

bush (E07) replacing them, if necessary, in

accordance with Section 5.2.2 Peel Valve (E21).

Also check for deposits of solids likely to interfere

with the smooth working of the float system.

5. When fitting a new float, ensure that it is securely

tightened against nut (E12). During this procedure

the float should be positioned on the rod so that

the operating plate (E15) with its associated peel

valve fasteners is just clear of the central clamp

bar screws (E16), when the float is located in the

upper diffuser cone.

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6. If all components are seen to be in satisfactory

condition, replace separator cap assembly,

washers (E39) and nuts (E38). Alternately tighten

each nut a small amount to ensure that the cap is

pulled down evenly. Do not over tighten. Replace

air hose and re-tension hose clip (E36).

5.2.2 Peel Valve (E21)

If significant quantities of water are discharged from

the exhaust valve (B17) of the air pump, and the float

(E11) is in satisfactory condition, it is probable that a

fault exists in the peel valve assembly.

To inspect and service, proceed as follows:

1. Remove separator cap sub-assembly (E01) to

(E21) and unscrew float (E11) and nut (E12).

2. Release screws (E09) and spring washers (E10)

to allow upper diffuser/valve assembly to be

withdrawn.

3. Remove screws (E04) and sealing washers (E05)

to allow upper diffuser (E06) to be removed from

the port plate sub-assembly.

4. Examine condition of peel valve rubber (E21) and

air ports In plate (E03) which it should completely

cover when the float is fully raised. If the rubber

does not seat correctly, is distorted, or in any way

damaged, it must be removed and discarded by

releasing screws (E16).

5. To fit new peel valve rubber (E21):

a) Carefully clean existing parts thoroughly,

especially surfaces of port plate (E03), and

clamp bars (E19) and position new rubber on

plate.

b) Assemble screws (E16), clamp bar (E19),

clamp bar seal (E20), washer (E18) and nuts

(E17) in sequence shown on drawing.

Alternately tighten each nut a small amount to

ensure that even clamping pressure is

produced. Correctly tightened nuts will not

cause the clamp bar to distort the rubber.

6. Carefully attach the ends of the valve rubber (E21)

to the operating plate (E15), noting that the

components and method of assembly are identical

to those described in Instruction 5 of this Section

except that clamp bar seal (E20) is omitted.

Again, ensure that the nuts are not over tightened.

7. After completing Instructions 5 and 6 of this

Section, check that the peel valve rubber is

capable of closing all of the air holes in port plate

(E03) when operating rod (E13) is square to the

plate and fully lifted.

8. Check condition of bush (E07) in upper diffuser

(E06) and replace, together with clip (E08) and

nitrile washer (E37), if significantly worn.

NOTE: The operating rod (E13) is normally a slack fit

in the bush.

9. Position port plate sub-assembly on upper diffuser

(E06), fit washers (E05) after checking that they

will seal efficiently and fully tighten screws (E04).

Reassemble nut (E12) and screw float (E11) on to

operating rod and tighten securely in accordance

with Section 5.2.1 Float (E11) Instruction 5.

10. Recheck operation of peel valve rubber (E21) to

ensure that it fully covers air ports in plate (E03)

when the float is located in the upper diffuser

cone. In this position there should be a gap of

3.5 mm between the heads of the centre clamp

bar screws (E16) and the operating plate (E15). If

the dimension is incorrect, adjust position of float

on operating rod.

11. Examine condition of gasket (E02) and renew, if

necessary, before installing between port plate

(E03) and separator cap (E01). Fit spring

washers (E39) and screws (E38) each of which

should be sequentially turned a small amount until

fully tightened. Gasket (E02) must be evenly

compressed.

12. Replace separator cap sub-assembly in

accordance with Section 5.2.1 Float (E11)

Instruction 6.

5.2.3 Deposits of Solids

†‡

When handling liquids containing solids capable of

adhering to product wetted surfaces, it is advisable

periodically to check the valve system in the separator.

To inspect and service, proceed as follows:

1. Remove separator cap sub-assembly in

accordance with Section 5.2.1 Float (E11)

Instructions 1 and 2, allowing separator body

(E22) together with lower diffuser (E24), to be

lifted off the suction tube (E27).

2. Remove any deposits of scale from lower diffuser

(E24) and check condition of welds securing its

circular bottom to the perforated cylinder.

Remove any solids that may have accumulated in

the suction tube (E27), renew gasket (E25) and

reposition separator body/lower diffuser assembly

on suction tube.

3. Remove deposited materials from surfaces of

upper diffuser (E06) and note, in particular,

condition of welds securing cone and disc to

perforated diffuser body. Also examine diffuser

bush (B07) and operating rod (E13), and replace if

significantly worn in accordance with Section 5.2.2

Peel Valve (E21) Instructions 3 to 11. Remove all

deposited solids that would interfere with the free

movement of the mechanism, obstruct the

passage of air across the port plate holes, or

inhibit the flow of water (through the holes in the

upper diffuser, for example).

4. Once it is established that all components are in a

satisfactory condition and are free from scale,

replace separator cap sub-assembly in

accordance with Section 5.2.1 Float (E11)

Instruction 6. Any re-assembly work carried out

on the peel valve assembly should be in

†

Use lower Diffuser (Part No. 00-15-038100) for sludge

handling duties. This is recognised by holes in the base as

well as around the side.

‡

Use lower Diffuser (Part No. 00-15-038000) for other

applications where no solids are present which can adhere to

the internal surfaces.

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accordance with Section 5.2.2 Peel Valve (E21)

commencing Instruction 1.

5.3 Impeller, Mechanical Seal,

Wear Plate and Delivery Valve

Maintenance

5.3.1 Impeller (C02)

Generally speaking, it is only necessary to remove the

impeller if the existing component has become

severely abraded, or if access to other rotating parts is

required.

To remove and replace, proceed as follows:

1. Drain oil from the mechanical seal chamber and

reservoir (D50) by removing the 3/8" BSP plug

(D20). The condition of the oil will indicate

whether or not the mechanical seal has been

functioning correctly. If contamination is evident,

the mechanical seal must be replaced in

accordance with Section 5.3.3 Mechanical Seal

(D14).

2. Remove air hose item (E35) from separator cap

(E01), after loosening relevant hose clip (E36).

3. Remove nuts (E38) and washers (E39), and lift off

separator cap (E01) complete with peel

valve/upper diffuser assembly, (E01) to (E21)

inclusively.

4. Lift separator body (E22) complete with lower

diffuser (E24) off suction tube (E27).

5. Remove the twelve M12 nuts (C35) and spring

washers (C36) joining the suction tube and volute.

6. Jack the suction tube away from the volute using

two M12 bolts in the two tapped holes in the

suction tube flange.

NOTE: The suction tube and separator may be

removed as an assembly with suitable lifting gear

(weight = 84kg).

7. Take care not to damage the shims (C19), 'O' ring

(C24), or wear plate (C03).

8. Release the M16 capscrew, (C28) R.H. thread.

The impeller may be held stationary by placing a

piece of wood between an impeller blade and the

cutwater.

NOTE: Take care when disengaging the impeller

capscrew (C28) as the compressed mechanical

seal spring will push the impeller off the shaft.

9. Remove the impeller complete with M16 capscrew

(C28), impeller collar (C05), Dowty seal (C27), 'O'

ring (C21) and the mechanical seal. The impeller

spacer 'O' ring (D16) may also come away with

the impeller.

10. Grease and fit a new spacer 'O' ring (D16).

11. Engage mechanical seal on the impeller see

Section 5.3.3.

12. Oil impeller bore.

13. Slide impeller onto shaft ensuring that the hub

passes inside the spring.

14. Fit impeller collar (CO5) with new 'O' ring (C21).

15. Fit impeller (C02).

16. Fit M16 capscrew (C28) with a new greased

Dowty washer (C27). Apply Loctite Nutlock 242 to

the thread.

17. Compress mechanical seal spring and tighten

M16 capscrew (C28) to 90 lbf-ft (122 Nm) torque.

It is essential that this screw is correctly tensioned.

During this operation, it will be necessary to lock

the impeller by means of a wooden block wedged

between the impeller blades and volute casing

(C01). Remove block after use.

18. Check the impeller back clearance is 0.5mm. For

adjustment see Section 5.3.2 Setting Impeller

Clearances instructions 1 to 4 inclusively.

19. Inspect suction tube 'O' ring (C24) and replace if

necessary.

20. Remove jacking screws from suction tube flange.

21. Check the impeller front clearance is 0.5mm. For

adjustment see Section 5.3.2 Setting Impeller

Clearances instructions 5 to 12 inclusively.

22. Fit suction tube to volute with the necessary

shims, (C19) and secure with twelve M12 nuts

(C35) and spring washers (C36).

23. Reposition separator body sub-assembly on

suction tube, and fit separator cap assembly.

Assemble washers (E39) and nuts (E38) and

alternatively tighten each nut a small amount to

ensure that the cap is pulled down evenly. Do

NOT over-tighten.

24. Reposition air hose (E35) on spigot of separator

cap (E01) and tighten hose clip (E36).

25. Refill oil reservoir (D50) with oil to dipstick level

(D52).

5.3.2 Setting Impeller Clearances

General

Clearances at the front and back of the impeller must

be maintained at 0.5mm maximum. Increasing the

clearance will result in loss of hydraulic efficiency and

reduced bearing life. Both front and back clearances

are established by shims (C19, D25) respectively.

Back Clearance

This should be checked using feeler gauges with

access through volute discharge. If adjustment is

required:

1. Remove impeller in accordance with Section 5.3.1

Impeller (C02), instructions 1 to 9 inclusively.

2. Remove spacer (D15) with the mechanical seal

rotating face attached using Service Tool

1590170000 engaged in the spacer slots.

3. Add or remove shims (D25A - 0.25mm), (D25B -

0.1mm) to give the required clearance. Ensure

that the shims are correctly seated on the shaft

shoulder.

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4. Refit impeller in accordance with Section 5.3.1

Impeller (C02), instructions 10 to 25 inclusively

and recheck clearance.

Front Clearance

5. Remove the suction tube (E27) from the volute

casing (C01) in accordance with Section 5.3.1

Impeller (C02), instructions 1 to 6 inclusively.

6. Remove shims (C19).

7. Refit suction tube and front wearplate assembly.

8. Lightly tighten four equi-spaced M12 nuts (C35)

on volute studs sufficiently to just nip the impeller.

9. Use feelers to measure the clearance between the

suction tube flange and the volute.

10. Calculate the shims required to give a maximum

clearance of 0.5mm.

11. Fit shims, (C19A = 0.25mm) or (C19B = 0.15mm),

taking care not to damage the 'O' ring (C24).

12. Refit suction tube (E27) in accordance with .

Section 5.3.1 Impeller (C02), instructions 22 to 25

inclusively.

5.3.3 Mechanical Seal (D14)

The mechanical seal should be replaced if the flushing

chamber oil continuously leaks into the pumped fluid,

or if the oil becomes contaminated with the product.

This latter condition is sometimes indicated by leakage

of fluid out of the breather cap (D52). Under extreme

conditions, pumped fluid may be seen escaping out of

the vent at the bottom of bearing housing (D01).

In the event of abrasive materials being detected in the

oil, it is likely that lip seal (D13) will have become worn

and necessitate replacement in accordance with

Section 5.4.1 Lip Seals (D13).

Daily checks on oil condition should ensure that seal

failure is detected before damage occurs to related

components. If the mechanical seal leaks, proceed as

follows:

1. Remove impeller in accordance with Section 5.3.1

Impeller (C02), Instructions 2 to 9 inclusively.

2. Remove spacer (D15) complete with mechanical

seal rotating element using Service Tool

1590170000 engaged in the spacer slots.

3. Remove impeller spacer shims (D25) from the

shaft.

4. Using seat removal tool (Part No. 0015166000),

withdraw mechanical seal stationary seat and

rubber ring from recess in mounting pedestal

(D05)

5. The rotating parts of mechanical seal (D14) should

now be discarded.

6. Once removed, examine condition of spacer (D15)

and replace with new component if unacceptably

corroded or worn.

IMPORTANT ADVICE

New mechanical seal components must

be handled with great care, in

particular, the seal faces must not be

touched by hand and must only come

into contact with clean soft paper that is

free from abrasive materials.

Premature seal failure is likely to occur

if this advice is not heeded.

7. To replace the mechanical seal repair ring fitted

from pump serial number 150SA 377 proceed as

follows. For pumps built prior to this, that have not

already been modified, a service exchange

pedestal is available by quoting part number

1595128000, contact Selwood Ltd for a quotation.

8. To gain access to the seat, remove lip seal

components in accordance with Section 5.4.1 Lip

Seals (D13) instructions 1 to 11 inclusively.

9. Remove the four screws (D49) that secure the

repair ring to the pedestal (D05). Apply heat to

the old repair ring (D48) to break down the Loctite

retainer bond. Using a suitable drift, or block of

wood, tap out the old repair ring.

10. Clean up the housing with Scotchbrite or similar

and apply Loctite retainer 638 to the new repair

ring.

11. Insert the repair ring into the pedestal ensuring

that the screw holes are correctly aligned. Apply

Loctite screwlock 222 to the four screws (D49)

and tighten evenly. Leave for 15-30 minutes for

the bond to begin curing and to reach handling

strength.

12. If replacing the lip seals proceed in accordance

with Section 5.4.1 Lip Seals (D13) instructions 12

to 23 inclusively. If not, replace the bearing

housing assembly, taking care not to damage the

shaft on the mechanical seal housing.

Important Pre-Installation Checks

a) Condition of main lip seals and shaft surfaces

must be good. See 5.4.1.

b) Seal flushing chamber must be clean, free

from grit and silt deposits, otherwise oil properties

will be impaired.

c) Shaft bearings must be in good condition and

have no more than 0.006" axial movement. Check

with dial indicator. If excessive, reset or replace

bearings. See Section 5.4.3 for resetting

procedure. Clearance new is 0.002" to 0.003".

d) Size and condition of stationary seal recess in

pedestal must be checked. Maximum permissible

diameter is 3.625". If oversize a new pedestal or

new wear repair ring must be fitted See above.

e) Wear plates, if excessively worn, should be

replaced to regain a running clearance of 0.020" ±

0.004”. See Section 5.3.4 and 5.3.5. For resetting

See Section 5.3.2

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f) An old corroded impeller cannot be used

unless the size and surface finish of the rear drive

boss is as new. Size 2.753" to 2.758" clean un-

pitted surface with a generous chamfer at the

spacer end.

13. Ensure all pre-installation checks have been

made. Inspect the lead in chamfer on the pedestal

stationary face recess, this should be smooth,

clean and corrosion free.

14. Check the new or cleaned up impeller for a tight

but sliding fit on the shaft and key.

15. Check the impeller back clearance and adjust if

necessary. See Section 5.3.2. A clearance of

0.020" ± 0.004” should be achieved.

16. Lubricate the stationary seal recess and lead with

a very diluted solution of soft soap. Lubricate the

outside face assembly with clean water only and

using tool 1596131000 push the seal face firmly to

the base of the recess. The use of the tool will

ensure that the face is fitted square to the shaft

axis. Check face is clean when tool is removed.

17. Lubricate impeller key (D31) with oil and fit to

shaft.

18. The shaft spacer (D15) should be lubricate inside

and slid into its final position on the shaft against

the shims on the shaft shoulder.

Note: No 'O' ring is required in the spacer recess.

19. Lay the impeller blade side down on a firm

surface. Lightly oil the bore and keyway.

20. With clean hands, apply soap to the outside of the

impeller boss and lead. Lightly soap inside the

back of the rubber bellows. Then with a twisting

action applied to the rear of the spring and carrier

ring, screw the bellows onto the impeller boss.

Ensure the bellows is fully located against the

back of the impeller

21. Check that no dirt or contamination has got onto

the seal surface. Apply a couple of drops of clean

oil to the face and spread to a thin film with a

clean finger.

22. The impeller/seal assembly can now be mounted

on the shaft taking great care not to contact the

seal face on the shaft or key whilst locating the

shaft in the bore. Keep pushing the impeller until

the seal faces contact. Refit impeller retaining

screw and reassemble pump in accordance with

Section 5.3.1 Impeller (C02), instructions 10 to 25

inclusively.

5.3.4 Front Wear Plate (C03)

Failure of the pump set to pump under suction could

be due to a worn wear plate or incorrect clearance

between impeller and front wear plate.

1. Remove suction tube and separator assembly in

accordance with Section 5.3.1 Impeller (C02)

instructions 1 to 6 inclusively.

2. Remove eight M6 slotted cheese head screws

(C32) and washers (C33) securing front wear

plate (C03) complete with ‘O’ rings (C25.C26) to

Suction tube (E27).

3. Use circumferential groove to lever front wear

plate (C03) away from suction tube and spigot.

Discard ‘O’ rings (C25,C26) and clean suction

tube and wear plate interface.

4. Check condition of front wear plate (C03) for

excessive wear or damage and replace if

necessary.

5. Lightly grease suction tube and front wear plate

interface and fit new ‘O’ rings (C25.C26) in to

corresponding grooves on Suction tube (E27).

6. Examine M6 slotted cheese head screws (C32)

and replace if damaged.

7. Offer front wear plate (C03) to suction tube (E27)

and carefully align screw holes without dislodging

‘O’ rings. Fit washers (C33) and M6 slotted

cheese head screws (C32) with Loctite Nutlock

242 applied to threads.

8. Check impeller front clearance and adjust if

necessary in accordance with Section 5.3.2

Setting Impeller Clearances instructions 7 to 8

inclusively.

9. Examine suction tube and volute ‘O’ ring (C24)

and replace if necessary.

10. Refit suction tube and separator assembly in

accordance with Section 5.3.1 Impeller (C02)

instructions 22 to 25 inclusively.

5.3.5 Rear Wear Plate (D06)

Failure of the pump set to pump under suction could

be due to a worn wear plate or incorrect clearance

between impeller and rear wear plate.

1. Remove suction tube, separator assembly and

impeller in accordance with Section 5.3.1 Impeller

(C02) instructions 1 to 9 inclusively.

2. Remove eight M6 slotted chesse head screws

(D33) and washers (D26) securing Rear wear

plate (D06) complete with ‘O’ rings (D17.D18) to

support ring interface on mounting pedestal (D05).

3. Carefully lever rear wear plate (D06) away from

mounting pedestal (D05) and its spigot location.

Discard ‘O’ rings (D17.D18) and clean support ring

and rear wear plate interface.

4. Check condition of rear wear plate (D06) for

excessive wear or damage and replace if

necessary.

5. Lightly grease rearwear plate and support ring

interface and fit new 'O' rings (D17.D18) in to

corresponding grooves on mounting pedestal

(D05).

6. Examine M6 slotted cheese head screws (D33)

and replace if damaged.

7. Offer rear wear plate (D06 ) to mounting pedestal

(D05) and carefully align screw holes without

dislodging ‘O’ rings. Fit washers (D26) and M6

slotted cheese head screws (D33) with Loctite

Nutlock 242 applied to threads.

8. Check impeller back clearance and adjust if

necessary in accordance with Section 5.3.2

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Setting Impeller Clearances instructions 2 to 3

inclusively.

9. Examine support ring and volute ‘O’ ring (D45)

and replace if necessary.

10. Refit suction tube, separator assembly and

impeller in accordance with Section 5.3.1 Impeller

(C02) instructions 10 to 25 inclusively.

5.3.6 Delivery Valve (C27)

Failure of the pump set to pump under suction lift

conditions could be due to a fault in the delivery valve

assembly.

To inspect and service, proceed as follows:

1. Ensure that pump has been shutdown and the

delivery line has been drained.

2. Release four long nuts (C17), rotate inspection

cover (C07) anti-clockwise until free of studs (C29)

and nuts (C17) and remove cover. It now

becomes possible to lift valve flap (C09) rotating

through opening by hand to expose valve seat

(C06) so allowing foreign matter to be removed.

Also undertake a preliminary check of the

condition of the valve rubber (C10).

3. If further disassembly of valve is required to

replace valve seat (C06), Valve rubber (C10) and

Valve pivot pin and bushes (C14 and C12)

proceed with following instructions, If not refit

cover.

Valve Rubber (C10)

Valve rubber may be damaged or worn preventing

sealing with valve seat. Replacement instructions as

follows:-

1. Unscrew M12 self locking nut (C51) and sealing

washer (C41) holding flap valve assembly

together.

2. Carefully remove retaining plate (C13) complete

with bolt (C40), sealing washer (C41) and star lock

washer (C50).

3. Lever valve rubber (C10) away from Valve hinge

(C09). Examine condition of Valve rubber (C10),

especially along hinge line and seating surface.

Discard if damaged or mis-shapen.

4. Clean Valve hinge (C09) and retaining plate (C13)

of loose debris and reassemble flap valve with

new valve rubber (C10), new M12 self locking nut

(C51) and if required new sealing washer (C41).

5. Check Valve is sealing fully and refit inspection

cover

Valve Seat (C06).

Valve seat may be damaged or worn preventing

sealing with valve rubber. Replacement instructions as

follows:

1. Remove eight M16 nuts (C47) and washers (C46)

from studs (C45) securing valve to volute.

Carefully lift Delivery valve body (C04) complete

with flap valve parts off volute (C01).

2. Remove protective plug (C49) on base flange of

valve body (C04) and unscrew M8 socket

setscrew (C48) holding valve seat (COG) in place.

3. Remove valve seat (C06) from valve body.

Discard ‘O’ ring (C22) fitted to valve seat.

Examine condition of valve seat for excessive

wear or corrosion. Clean part and refit. Replace if

necessary.

4. Before refitting valve seat (C06), clean and grease

‘O’ ring groove and fit new ‘O’ ring (C22)

5. Push valve seat into valve body until registered on

abutment. Smear Loctite 242 on threads of M8

socket setscrew (C48) and insert into valve body

to lock valve seat. Fit protective plug (C49).

6. Before refitting valve onto volute check condition

of gasket (C20) and replace if necessary. Position

valve onto volute flange and fit M16 nuts (C47)

and washers (C46). Carefully tighten nuts (C47)

in small increments to produce even clamping on

gasket (C20).

7. Check valve is sealing fully and refit inspection

cover.

Valve Pivot Pin (C14) and Pivot Bushes (C12)

Valve pivot pin and bushes may be damaged or worn

preventing valve rubber sealing with valve seat.

Replacement instructions as follows:

1. Remove eight M16 nuts (C47) and washers (C46)

from studs (C45) securing valve to volute.

Carefully lift Delivery valve body (C04) complete

with flap valve parts off volute (C01).

2. To enable access to pivot pin (C14) remove the

two circular pivot caps (C16) with gaskets (C15)

situated each side of delivery valve held in by

screws (C42) and washers (C42). Disgard pivot

cap gaskets (C15) after removal.

3. Unscrew three socket setscrews (C44) locking the

valve flap (C09) to pivot pin (C14).

4. Push pivot pin (C14) completely out of valve body

(C04) and remove. Push pivot pin bushes (C12)

and spacers (C52) out of body.

5. Clean removed parts and check condition of pivot

pin (C14) and pivot pin bushes (C12) and spacers

(C52) for corrosion, damage or excessive wear

and replace with new parts if necessary.

6. Clean the pivot bush housings in valve body (C04)

and push in pivot bushes (C12) until registered on

internal abutments.

7. Push clean pivot pin (C14) through fitted pivot

bushes (C12), spacers (C52) and valve flap (C09).

Centralise valve flap on to valve seat and center

pivot pin (C14) within valve flap. Smear M8 socket

setscrews (C44) threads with Loctite 242 and Lock

valve flap in place.

8. Renew pivot cap gaskets (C15) and replace pivot

caps (C16). Fit in place with screws (C42) and

washers (C43).

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9. Before refitting valve onto volute check condition

of gasket (C20) and replace if necessary. Position

valve onto volute flange and fit M16 nuts (C47)

and washers (C46). Carefully tighten nuts (C47) in

small increments to produce even clamping on

gasket (C20).

10. Check valve is sealing fully and refit inspection

cover.

5.4 Maintenance of Lip seals,

Headland V Seal, Bearings and

Main shaft.

5.4.1 Lip Seals (D13)

For service and inspection proceed as follows:

1. Remove impeller (C02) and mechanical seal

(D14) in accordance with Section 5.3.1 Impeller

(C02) instructions 1 to 9 and Section 5.3.3

Mechanical Seal (D14) instructions 2 to 4

inclusively.

2. Remove coupling guards and flexible element

from coupling.

3. Disconnect air pump exhaust hose from air pump.

Make sure Oil Reservoir (D50) is fully drained then

disconnect Oil Reservoir Hoses (D53, D54) and

Breather Hose (D57) from bearing housing (D01).

Remove three bolts that hold the pump to the

chassis from mounting pedestal (D05) and loosen

fourth on delivery side of pump.

4. Swing mounting pedestal (D05) and attached

assembly anti-clockwise (viewed from above) until

both sides of coupling are clear of each other.

Support bearing housing and air pump assemblies

in a sling (assembly weight = 76kg).

5. Remove twelve M12 nuts (D37) and spring

washers (D38), from the studs securing the

bearing housing flange to the mounting pedestal.

Carefully withdraw the bearing housing with the air

pump attached.

NOTE: Move axially for at least 100mm for shaft

to clear mechanical seal housing.

6. Stand assembly on a clean flat surface, with the

shaft vertical, on the coupling flange with wooden

packing under the air pump dish.

Remove six M6 hexagon head screws (D34) and

spring washers (D36) from the bearing front cover

(D02).

7. Using the tapped holes in the bearing front end

cover flange jack it away from the bearing

housing.

8. Remove bearing front end cover (D02) complete

with lip seals (D13) and remove jack screws.

9. Remove and discard gasket (D07).

10. Inspect shaft sealing surface for damage. If

necessary remove the shaft in accordance with

Section 5.4.3 Bearings (D10).

11. Remove lip seals and clean seal housings.

12. Oil new seals and push into housings, both seals

must have lips facing towards the impeller.

13. Remove excess grease from in front of the

bearing to just expose the rollers. This will avoid

the likelihood of future overpacking.

14. Ensure breather (D24) is clear.

15. Fit new gasket (D07) ensuring that the vent hole in

the bottom of the seal oil chamber is not covered.

16. Grease shaft on the sealing surface and fit bearing

front end cover complete with lip seals.

NOTE: The plug must go to the bottom of the

chamber in the recess.

17. Fit six M6 screws (D34) and spring washers

(D36), and torque to 7 to 8 Ibf-ft (9.5 to 10.8 Nm).

18. Fit new 'O' ring (D19) to bearing housing spigot

and smear with grease or oil.

Replace bearing housing assembly taking care not

to damage the shaft on the mechanical seal,

housing.

19. Fit twelve M12 nuts (D37) and spring washers

(D38), and torque to 60 Ibf-ft (81 Nm).

20. Swing the mounting pedestal and attached

assembly back into position and insert chassis

bolts, spring washers and nuts.

Torque chassis bolts to 150 Ibf-ft (203 Nm).

21. Reinstall flexible element of drive coupling.

22. Refit coupling and belt guards. Reconnect air

pump exhaust hose. Reconnect Oil Reservoir

hoses (D53, D54) and Breather hose (D57) to

Bearing housing (D01).

23. Refit impeller (C02) and mechanical seal (D14) in

accordance with Section 5.3.1 Impeller (C02)

instructions 10 to 25 inclusively.

NOTE: If lifting gear is not available the air pump

may be separated from the bearing housing

reducing the lifted weights to:

a) Air Pump Assembly = 40Kg

b) Bearing Housing Assembly = 38.5kg.

For air pump assembly removal and installation

see Section 5.1.13.

5.4.2 Headland V Seal (D12)

For service and inspection proceed as follows:-

1. Remove coupling guards and flexible element

from coupling.

2. Disconnect air pump exhaust hose from air pump.

Remove three bolts hold pump to chassis from

mounting pedestal (DO5) and loosen fourth on

delivery side of pump.

3. Swing mounting pedestal (DO5) and attached

assembly anti-clockwise (viewed from above) until

both sides of coupling are clear of eachother.

4. Remove pump end of drive coupling from pump

shaft noting position of center hub or taperlock in

relation to drive shaft end or air pump drive pump

pulley.

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5. Remove air pump drive belt (A09) in accordance

with Section 5.1.11 Drive Belt instructions 4 to 5

inclusively. Loosen screws in pump pulley

taperlock (A48) and disengauge pump pulley

(A49) and taperlock (A48) followed by spacer

(DO8) from pump drive shaft (D04).

6. Remove circlip (D27) from groove in drive shaft

collar (D09). Gently prise out Hendland V Seal

(D12) from recess in bearing drive end cover

(DO3).

7. Examine seal for damage or excessive wear and

discard if necessary

8. Clean and lightly grease sealing area recess in

bearing drive end cover (D03) and outside

diameter of drive shaft collar lightly grease.

9. Press in new Headland V Seal (D12) and replace

circlip (D27) and spacer (DO8).

10. Refit taperlock (A48) and pump pulley (A49)

ensuring that the taperlock is pushed up against

spacer (D08) and tighten in place.

11. Refit air pump drive belt (A09), pulley (A08) and

taperlock (A13) in accordance with Section 5.1.11

Drive Belt instructions 6 to 9 inclusively.

12. Reassemble pump end of drive coupling and fit to

drive shaft to previously noted original position.

13. Reinstall flexible element of drive coupling,

reposition pump onto pump mounting holes and

secure in place with bolts, washers and nuts.

14. Refit coupling and belt guards and reconnect air

pump exhaust hose from air pump.

5.4.3 Bearings (D10)

For service and inspection proceed as follows:

1. Remove Bearing front end cover (D02) complete

with Lipseals (D13) in accordance with Section

5.4.1 Lip Seals (D13) Instructions 1 to 11

inclusively.

2. Remove headland V seal (D12) in accordance

with Section 5.4.2 Headland V Seal (D12)

instructions 1 to 6 and air pump assembly from

pump pedestal in accordance with Section 5.1.13

Air Pump Assembly instructions 1 to 5 inclusively.

3. To enable access to internal bearings remove

bearing drive end cover (D03) by unscrewing six

M6 screws (D34) and washers (D36). Remove

cover end cover and discard gasket (D07).

4. Remove drive shaft collar (D09) by unscrewing

two setscrews (D30) completely from it. Using a

‘C’ type spanner remove drive shaft collar (D09)

from drive shaft (D04)

5. Mount the assembly on a press with the shaft

vertical and the impeller end downwards. A

minimum of 30mm clearance beneath the shaft is

required.

6. Remove plastic protection plug (D39) from shaft

end.

7. Protect shaft end and engage in the press to

remove drive end arid volute end bearings (D10)

consisting of a bearing cone and cup.

8. Press drive shaft (D04) through bearings (D10),

26mm movement will clear bearing cones from

their seats.

9. Hold shaft (D04) steady and carefully lift off

bearing housing (D01) complete with bearing

cups.

NOTE: Take great care not to damage the shaft

particularly on the sealing surface (largest

diameter of drive shaft).

10. Press the remaining bearing cone off its seat ,

over the next, and remove from shaft.

11. Remove the bearing cups from the bearing

housing using a two claw puller engaging in the

pockets cast into the housing behind the cups.

12. Discard old bearings (D10), Thoroughly clean all

bearing housing surfaces. Inspect drive shaft

(D04) for damage, replace if necessary and clean

all drive shaft surfaces thoroughly, smear oil on

bearing (D10) mounting diameters

13. Press new bearing cups of bearings (D10) into

bearing housing (D01 ) ensuring that they are right

up against their abutments.

14. Pack the impeller end bearing cover about 1/3rd

full with BP Energrease LS-EP2.

15. Press impeller end bearing cone onto the shaft

using a suitable tube that contacts the inner race

only. The taper roller bearings are mounted back

to back. The bearing must first be pressed over

the drive end bearing seat. Ensure that it Is

pressed right up against the shaft abutment.

16. Pack the rollers full with BP Energrease LS-EP2.

17. Hold the shaft vertical with the impeller end

downwards and carefully lower the bearing

housing over.

18. Pack the drive end bearing rollers full with BP

Energrease LS-EP2.

19. Lower the drive end bearing cone over the shaft

and press about 20mm onto its seat.

20. Screw the shaft collar (D09) up to bearing.

21. Fit half coupling to shaft.

22. Fill hole in shaft end with SKF hydraulic oil ref.

LHMF3D1 and connect the hose from the oil

injection pump SKF 729123.

23. Clamp the bearing housing flange in a soft jaw

vice with the shaft horizontal and the coupling

nearest to you.

24. Set up a dial type indicator on the shaft impeller

end.

25. Measure the axial clearance in the bearings by

moving the shaft back and forth whilst turning to

bed in rollers.

26. Pump up the hydraulic oil pressure until the

bearing can be moved by tightening the shaft

collar with a 'C' spanner (SKF HN11).

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27. SET BEARING AXIAL CLEARANCE TO 0.0015

TO 0.0025 INCHES (0.0381-0.0635 mm) by

repeating stages 25 and 26.

NOTES:

a) One complete turn of the shaft collar gives

2mm axial movement.

b) Do not carry out the bearing adjustment

procedure with lip seats fitted as they will impede

shaft movement and may cause errors.

c) A special tool is available to facilitate bearing

adjustment Ref. WRS 987.

d) The correct bearing clearance must be

accurately set to ensure satisfactory operation.

Failure to do this will result in overheating and

consequently reduced bearing life.

e) Use BP Energrease LS-EP2 only.

f) Do not pack grease into outer covers, excess

causes overheating and premature bearing failure.

28. Fit and tighten two setscrews (D30) to lock shaft

collar to shaft.

29. Remove the dial indicator.

30. Disconnect the hydraulic pump and drain hydraulic

oil from shaft. Discard oil and fit plastic plug (D39)

in shaft end to protect the tapped hole.

31. Remove the half coupling.

32. Refit Lip seals (D13), Mechanical Seal (D14),

Impeller (C02) and remaining pump end parts in

accordance with Section 5.4.1 Lip Seals (D13)

instructions 12 to 19 inclusively and Section 5.3.1

Impeller (C02) instructions 10 to 24 inclusively.

33. Refit Air pump assembly to pump pedestal in

accordance with Section 5.1.13 Air Pump

Assembly instructions 7 to 8 inclusively.

34. Refit Headland V Seal in accordance with Section

5.4.2 Headland V Seal (D12) instructions 8 to 14

inclusively.

35. Reconnect Oil Reservoir Hoses (D53.D54) and

Breather hose (D57) from Oil Reservoir (D50) to

Bearing housing (D01) and Refill with reservoir

with oil to dipstick level.

5.4.4 Main Shaft (D04)

For service and inspection proceed as follows:

1. Remove main shaft (D04) in accordance with

Section 5.4.3 Bearings (D10) instructions 1 to 12

inclusively.

2. Reuse existing bearings (D10) if condition is

satisfactory.

3. Fit new main shaft (D04). During reassembly

check front and back impeller clearances in

accordance with Section 5.3.2 Setting Impeller

Clearances.

4. Reassemble pump in accordance with Section

5.4.3 Bearings (D10) instructions 13 to 35

inclusively.

5.5 Chassis Maintenance

It is possible to work on individual components of the

chassis without removing either the engine or the

pump unit. In all cases work should be undertaken on

level ground and care should be exercised to ensure

that the pump set is fully immobilised. If the chassis is

to be completely dismantled, both the engine and

pump unit should be removed in compliance with the

requirements of Health and Safety at Work Act, 1975.

1. To remove the fuel tank:

a) Drain the fuel by removing the drain plug and

washer.

b) Disconnect the fuel feed and return lines.

c) Place suitable supports beneath the tank and

remove the four nuts bolts and washers, the

access to the nuts and washers being inside

the main chassis members. The tank can

then be slid from beneath the chassis,.

2. To clean the fuel feed filter:

a) Remove the three set bolts and washers.

b) Lift the filter from the tank, taking care not to

lose the gasket.

NOTE: The filter can be removed for cleaning without

removing the tank from the chassis.

3. To remove the front axle:

a) Support the chassis beneath either the fuel

tank ensuring that the weight is taken on a

suitable piece of wood extending the full width

of the tank, or underneath the main chassis

members.

b) Remove the split pins and washers retaining

the wheels and slide the wheels from the

axle.

c) Remove the split pin and washer. From one

side only of the draw bar pivot pin, slide the

pin free of the pivot and draw bar thus

allowing the draw bar to come away from the

assembly.

d) Remove the split pin and washer from one

end of axle pivot pin and slide the pin clear of

the pivot and axle thus freeing the axle.

4. The front axle pivot locking system is designed as

a backup to the single bolt fixing. To remove

pivot:

a) Bend back lock washer and release the set

bolt lock washer and pivot topcap.

b) Drop the pivot clear of the chassis member.

NOTE: If the engine is in place on the chassis the

access to the set bolt is from beneath the engine

between the chassis members.

c) Extract and replace spring roll pin if damaged,

from top of pivot.

5. To remove the rear axle:

a) Support the chassis and remove the wheels

as described in Instruction 3 of this Section.

Selwood D150 Manual

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b) Release the four horizontally disposed nuts,

bolts, and spring washers and the two vertical

nuts, bolts, spring and taper washers.

6. To remove the lifting eye remove the four set bolts

and spring washers.

7. Reassembly is a reverse of the above, ensuring

that the wheel hubs, axles, pivot, pivot turntable,

axle pivot pin and drawbar pin are thoroughly

cleaned and liberally greased. Renew the fuel

feed filter gasket if necessary.

NOTE: When placing pivot top cap on top of

pivot, ensure the top cap locates correctly over the

spring roll pin in top of pivot shaft. Also when

placing the lock washer with fixing bolt in place

over the pivot top cap, ensure small tab locates in

second hole of the pivot top cap - the first hole

locating the spring roll pin. Always use new lock

washer. Finally bending up in one place to lock

against the flat of the setbolt hexagon.

5.6 Supersilent Canopy - Canopy

Removal

To remove the canopy proceed as follows:

1. Disconnect the battery positive and negative and

remove the battery assembly.

2. Disconnect exhaust pipework within canopy

having first removed insulation blanket.

3. Disconnect emergency stop wiring plugs from stop

buttons from within canopy. Tie up onto engine to

prevent damage to wiring.

4. Remove suction and discharge aperture cover

plates. Remove foam plugs and rubber blanking

gasket.

5. Remove discharge fitting and extension piece

from discharge flange of pump.

6. In each corner of the skid, working up through the

upper flange of the skid base are four M16

screws. Remove these in turn to release the

canopy from the corners of the skid base.

7. With the corners released undo the M24 nyloc

nuts from the centre lifting studs. The studs are

locked internally and will not turn beyond a few

degrees of movement. When these are both

released the canopy is ready to be lifted clear.

8. In order to prevent damage to the engine radiator

and to ensure a clean lift is achieved a pair of M12

eye bolts will be required to be fitted to the roof

section on the radiator end of the canopy. The

mounting positions are blanked off with normal

hex head screws at present, remove these and

replace with eye bolts.

9. Use a set of three or four leg chains. Attach two

to the centre lifting eye and snag the other two to

shorten them so that they pick up the radiator end

of the canopy square. Lift the canopy up and

away from the unit, place down on timber runners

to protect the lower edge.

5.7 Supersilent Canopy -Fuel Tank

Removal

To remove the fuel tank proceed as follows:

1. With the canopy removed it will now be necessary

to remove the pump and engine from the tank

structure. Begin by removing the coupling uar

rom the engine bll husing.

2. Disconnect the ir pump silncer hse from the

Table of contents

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