Enerpac L4383 User manual

L4383
Rev. B
05/20
Enerpac Air Pump
0-25,000 psi
D3001A0115AA
Instruction Sheet

L4383
ENERPAC
AIR
PUMP
0-25,000 psi
D3001A0115AA
CONTENTS
1.0 INTRODUCTION ......................................................................................................................................... 1
2.0 SAFETY ....................................................................................................................................................... 1
2.1 SAFETY PRECAUTIONS .................................................................................................................... 2
3.0 FEATURES AND COMPONENTS............................................................................................................... 3
4.0 AIR CONSUMPTION SPECIFICATION ...................................................................................................... 4
5.0 OPERATION ................................................................................................................................................ 5
5.1 SETTING STALL PRESSURE (WITH THE AIR REGULATOR).............................................................5
5.2 PUMP OPERATION............................................................................................................................... 5
5.3 PUMP DISCONNECTION ..................................................................................................................... 5
5.4 SETTING THE PUMP STALL PRESSURE (AIR REGULATOR) ........................................................... 6
6.0 SERVICING THE HYDRAULIC PUMP UNIT..............................................................................................7
7.0 SERVICING INSTRUCTIONS...................................................................................................................... 7
7.1 TO DISASSEMBLE THE MOTOR ......................................................................................................... 7
7.2 REPAIRING THE PILOT VALVE ASSEMBLY........................................................................................8
7.3 TO REPLACE THE PACKING IN THE HYDRAULIC CYLINDER......................................................... 8
7.4 THE HYDRAULIC PISTON.................................................................................................................... 8
7.5 REPAIRING OR REPLACING THE HYDRAULIC CHECK VALUES ....................................................8
7.6 REASSEMBLING THE PUMP............................................................................................................... 8
7.7 PUMP NOT RUNNING PROPERLY...................................................................................................... 9
8.0 STORAGE AND SPARES ............................................................................................................................ 9
8.1 REASSEMBLING THE PUMP............................................................................................................... 9
8.2 RECOMMENDED SPARES................................................................................................................... 9

L4383. .1
1.0 INTRODUCTION
Overview
The Hydraulic Pump Unit is compact, robust, and
designed for simplicity and speed of operation. The unit
measures 380mm x 400mm x 440mm high, and weighs
approx. 27 kg (with oil). It comprises of a reciprocating
piston pump mounted in a tubular frame with drip tray,
containing an oil reservoir and all air/oil valves and
fittings.
Delivery Instructions
Upon delivery all components must be inspected for
damage incurred during shipping. If damage is found
the carrier should be notified at once. Shipping damage
is not covered by the Enerpac warranty.
Warranty
• Enerpac guarantees the product only for the purpose
for which is intended.
• Refer to the Enerpac Global Warranty document for
terms and conditions of the product warranty.
Any misuse or alteration invalidates the warranty.
• Observe all instructions as communicated in this
manual.
• Modification to any part of the equipment described
in this manual should not be attempted.
• When replacement parts are needed, use only
genuine Enerpac replacement parts.
Replacement Parts
Refer to the Repair Parts Sheet (RPS), available at
www.enerpac.com, to order replacement parts when
required.
EU Declaration of Conformity
D3001A0115AA
These tools conform with the
requirements for CE.
Enerpac declares that this product has been tested and
conforms to applicable standards and is compatible to
all CE Requirements.
A copy of an EU Declaration of Conformity is enclosed
with each shipment of this product.
2.0 SAFETY
Read all instructions carefully. Follow all recommended
safety precautions to avoid personal injury as well
as damage to the product and / or damage to other
property. Enerpac cannot be responsible for any
damage or injury from unsafe use, lack of maintenance,
or incorrect operation. Do not remove warning labels,
tags, or decals. In the event that any questions or
concerns arise, contact Enerpac or a local Enerpac
distributor for clarification.
Save these instructions for future use.
If you have never been trained on high-pressure
hydraulic safety, consult your distributor or service
center for information about Enerpac Hydraulic Safety
Courses.
This manual follows a system of safety alert symbols,
signals, words, and safety messages to warn the user of
specific hazards. Failure to comply with these warnings
could result in death or serious personal injury, as well
as damage to the equipment or other property.
The Safety Alert Symbol appears throughout
this manual. It is used to alert you to potential
physical injury hazards. Pay close attention
to Safety Alert Symbols and obey all safety
messages that follow this symbol to avoid the possibility
of death or serious injury.
Safety Alert Symbols are used in conjunction with certain
Signal Words that call attention to safety messages or
property damage messages and designate a degree or
level of hazard seriousness. The Signal Words used in
this manual are DANGER, WARNING, CAUTION, and
NOTICE.
Indicates a hazardous situation that, if not
avoided, will result in death or serious personal injury.
Indicates a hazardous situation that, if not
avoided, could result in death or serious personal injury.
Indicates a hazardous situation that, if not
avoided, could result in minor or moderate personal
injury.
Indicates information considered important,
but not hazard related (e.g. messages related to property
damage). Please note that the Safety Alert Symbol will
not be used with the signal word.
DANGER
WARNING
CAUTION
NOTICE

2L4383
2.1 Safety Precautions
Failure to observe and comply with the following
precautions could result in death or serious personal
injury. Property damage could also occur.
• Read and completely understand the safety
precautions and instructions in this manual before
operating the Tensioner Pump or preparing a unit
for use. Always follow all safety precautions and
instructions, including those that are contained
within the procedures of this manual.
• Be sure the operator has completed safety induction
training, specific to the work surroundings. The
operator should be thoroughly familiar with the
controls and the proper use of the tool.
• Wear personal protective gear when operating
hydraulic equipment. Always wear eye protection.
Safety equipment such as dust mask, non-skid
safety shoes, hard hats, gloves or hearing protection
(used as appropriate) will reduce personal injuries.
• To minimize risk of personal injury keep hands
and feet away from the tool and workpiece during
operation.
• Do not overload equipment.
• Never apply pressure to a damaged hose, doing so
may cause it to rupture.
• Immediately replace worn or damaged parts.
Use only genuine Enerpac parts from approved
distributors or service centers. Equalizer parts have
been engineered and manufactured to be fit-for-
purpose.
• Do not handle pressurized hoses or couplings;
escaping oil under pressure can penetrate the
skin, causing serious injury. Seek medical attention
immediately if oil penetration is suspected.
• Only pressurize complete and fully connected
hydraulic systems. Do not pressurize systems that
contain unconnected couplers.
• Hydraulic circuit must be at zero pressure before
couplings are disconnected.
• Never leave the system unattended when under
pressure. When the system is under pressure DO
NOT STAND IN LINE with the direction of force of
the tensioners. This is a danger area. Keep this area
clear of personnel at all times when the system is
under pressure.
• Site pump on a secure, flat, level surface. Rope o
working area and place warning signs.
• Do not tamper with air pressure relief safety valve
on pump.
• Do not remove gauge covers when fitted.
• Check the date of the calibration certification. If the
recalibration date has passed, the gauge must be
recalibrate.
• If air supply is interrupted, turn o air stop valve on
pump.
WARNING
Failure to observe and comply with the following
precautions could result in minor or moderate personal
injury. Property damage could also occur.
• Ensure components are protected from external
sources of damage, such as excessive heat, flame,
moving machine parts, sharp edges and corrosive
chemicals.
• Take care to avoid sharp bends and kinks in hydraulic
hoses. Bends and kinks can cause severe back-up
pressure and cause hose failure. Protect hoses from
dropped objects; a sharp impact may cause internal
damage to hose wire strands. Protect hoses from
crush risks, such as heavy objects or vehicles; crush
damage can cause hose failure.
• Do not lift hydraulic equipment by the hoses or
couplers. Use only the designated carrying handles.
• Lubricate tools as directed in this manual prior to
operation. Use only approved lubricants of high
quality, following the lubricant manufacturers
instructions.
• Hydraulic equipment must only be serviced by a
qualified hydraulic technician. For repair service,
contact the Enerpac Authorized Service Centre in
your area.
• Rope o working area and place warning signs.
• To help ensure proper operation and best
performance, use of Enerpac oil is strongly
recommended.
CAUTION
NOTICE

L4383. .3
The Tensioner Pump consists of the following
components:
Air Filter
Ensures that a clean, dry air supply is maintained. Any
water is collected in the bowl and can be drained o by
turning the filter drain screw clockwise.
Air Regulator
Complete with its own pressure gauge, regulates the air
pressure to the pump. To increase air pressure, screw
the air regulator into its body.
Air Lubricator
Lubricates air supply and should be set to give one drop
for every 40 strokes of the pump, by turning adjusting
the red knob. Top up when required using a lubricating
oil of ISO Viscosity Grade 10.
Air Flow Valve
Controls air supply to pump and gives variable pump
speed control.
Reservoir
Capacity 8 litres, has coarse filter at filler neck and fine
filter at outlet pipe. Level indication tube should be at
least half full. Top up when required using an anti-wear
hydraulic oil of ISO Viscosity Grade 22-68. Appropriate
viscosity grades of oils shall be selected dependant on
operating temperatures.
Oil Return-to-tank Valve
When open allows oil to flow back to reservoir. To open,
turn handle anti-clockwise.
Pump
Piston type unit. Full breakdown details and spare seal
kits available on request.
Oil Pressure Gauge
0-1700 Bar (0-25,000 psi). Accuracy should be checked
and calibrated periodically.
Oil Outlet Connection
Quick release type, which is self-sealing to prevent dirt
penetration and oil drips.
Air Inlet Connection (not shown)
Standard 1/2 inch, reduced to 1/4 inch BSPT, via an
adaptor.
The pump is shipped from the factory without
hydraulic oil. Add hydraulic oil before operating the
pump! Use ISO Viscosity Grade 22 Minimum-68
Maximum.
NOTICE
3.0 FEATURES AND COMPONENTS
Figure 1: Major features and components of Enerpac Air Pump
Key
1. Air Filter
2. Air Regulator
3. Air Lubricator
4. Air Flow Valve
5. Reservoir
6. Oil Return-to-Tank
7. Pump
8. Oil Pressure Gauge
9. Oil Outlet Connection
1, 2, 3
6
98
7
5
4

4L4383
4.0 AIR CONSUMPTION SPECIFICATION
Air consumption is approximately 28 CFM (Cubic Feet per
Minute) of free air at 100 psi, for an oil discharge pressure
of 25000 psi. At lower air pressures and higher hydraulic
pressures, air consumption will be reduced proportionally
to the flow rates indicated.
Approximate Air to Hydraulic Pressure Ratios – Static Conditions
AIR PRESSURE
(PSI) 10 20 30 40 50 60 70 80 90 100
HYD. PRESSURE
(x1000 PSI) 3 6 9.5 12.6 16 19.1 22.3 25.6 29 32.3
AIR PRESSURE
(BAR) 0.7 1.4 2.1 2.8 3.5 4.2 4.9 5.6 6.3 7.0
HYD. PRESSURE
(BAR) 2.7 414 655 869 1103 1317 1538 1766 2000 2228
AIR PRESSURE
(MPa) 0.07 0.14 0.21 0.28 0.35 0.42 0.49 0.56 0.63 0.7
HYD. PRESSURE
(MPa) 20.7 41.1 65.5 86.9 110.3 131.7 153.8 176.6 200 222.8
Approximate Air to Hydraulic Pressure Ratios – Static Conditions
CIPM (Cubic Inch per Minute) and CCMPM (Cubic Centimetres per minute)
OIL DISCHARGE
PRESSURE
AIR VENT PRESSURE
60 PSI 80 PSI 100 PSI
6000 PSI 43CIPM 51 54
9000 PSI 38 46 49
12500 PSI 31 40 44
15000 PSI 27 37 40
20000 PSI 0 30 34
25000 PSI 0 10 28
OIL DISCHARGE
PRESSURE
AIR VENT PRESSURE
4Bar 5.5Bar 7Bar
414 Bar 705CCMPM 836 885
620 Bar 623 754 803
862 Bar 508 656 721
1034 Bar 443 606 656
1379 Bar 0 492 557
1724 Bar 0 164 459
OIL DISCHARGE
PRESSURE
AIR VENT PRESSURE
400000 Pa 550000 Pa 700000 Pa
41.4 MPa 705CCMPM 836 885
62.0 MPa 623 754 803
86.2 MPa 508 656 721
103.4 MPa 443 606 656
137.9 MPa 0 492 557
172.4 MPa 0 164 459

L4383. .5
5.0 OPERATION
Before connecting the DRY AIR SUPPLY,
ensure that:
1. The on/o (air flow) valve is closed. (i.e. handle in
vertical position)
2. The Oil Return-To-Tank valve is open. Connecting
the air supply with the air flow valve open and Oil
return valve closed will immediately start the pump
and could lead to excessive system pressures,
especially if the pump has not been regulated as
recommended in section 3, Pump Operation –
Setting Stall Pressure.
Figure 3: Connecting Dry Air Supply
A. CLOSE on/o (air flow) valve in VERTICAL position.
B. Open return to tank valve
OBSERVE PUMP SAFETY AND OPERATING
INSTRUCTIONS BEFORE OPERATING. It is STRONGLY
recommended that the pump be regulated to stall at the
MAXIMUM pressure required to operate the hydraulic
tools.
5.1 Setting Stall Pressure (with the Air Regulator)
To regulate the pump, proceed as follows:
1. Check Oil level in reservoir and fill if necessary.
2. Fit a blanked o nipple / coupling or a self-
connected interconnecting pipe to the Pump Outlet
Coupling. (NEVER pressurise an unconnected
CEJN Connection).
3. Open Oil return-to-tank valve.
4. CLOSE the on/o (Air Flow) valve in to the VERTICAL
position.
5. Connect main AIR SUPPLY to pump.
6. Check that the air gauge is giving a reading.
CAUTION
NOTICE
7. OPEN the on/o (Air Flow) valve in to the
HORIZONTAL position and allow the pump to
operate for approximately 1 minute or until no air
bubbles can be seen in the system.
8. Turn air pressure regulator screw to give zero
pressure reading on air pressure gauge (pump
ceases to operate when air pressure reaches zero).
9. Close Oil return-to-tank valve.
10. Screw in air pressure regulator until the desired
operating pressure is indicated on the oil pressure
gauge.
11. CLOSE on/o (Air Flow) valve in to the VERTICAL
position.
12. SLOWLY open Oil return-to tank valve, releasing
pressure. The pump is now set to stall at the desired
operating pressure and is ready to be coupled to
the hydraulic harness.
WITH ONLY A BLANKED OFF NIPPLE
/ COUPLING FITTED TO THE PUMP OUTLET THE
OIL PRESSURE WILL BUILD UP VERY QUICKLY.
ENSURE THAT AIR PRESSURE IS REGULATED (STALL
PRESSURE SET) TO A LEVEL THAT WILL NOT ALLOW
OVER PRESSURISATION OF THE SYSTEM.
5.2 Pump Operation
1. PRESSURISE the system by closing the Oil return-
to-tank valve and OPENING the on/o (air flow)
valve in to the HORIZONTAL position.
SHOULD THE AIR SUPPLY FAIL AT ANY
POINT DURING PRESSURISATION CLOSE THE ON/
OFF (AIR FLOW) VALVE AND OPEN THE RETURN
TO TANK VALVE TO RELEASE ANY ACCUMULATED
PRESSURE. DO NOT ATTEMPT TO PRESSURISE
THE SYSTEM UNTIL THE AIR SUPPLY HAS BEEN
RESTORED.
2. DE-PRESSURISE the system by CLOSING on/o
(air flow) valve in to the VERTICAL position and
SLOWLY opening return-to-tank valve.
5.3 Pump Disconnection
1. Ensure system has been De-pressurised, by
CLOSING the on/o (air flow) valve in to the
VERTICAL position and SLOWLY opening return-
to-tank valve.
2. Disconnect air supply.
3. Ensure Oil return to tank valve is open.
4. OPEN the on/o (air flow) valve in to the
HORIZONTAL position.
5. Drain o any Oil from the air filter.
6. Store as detailed in section 6, Storage.
WARNING
WARNING

6L4383
5.4 Setting the Pump Stall Pressure (Air Regulator)
1. Open return to tank valve.
2. CLOSE on/o (air flow) valve in to the VERTICAL
position.
3. Connect DRY AIR SUPPLY
4. Check a reading is given on pressure gauge.
5. Open return to tank valve. OPEN the on/o (air
flow) valve in to the HORIZONTAL position, allow
pump to operate for approximately one minute
until air has been removed from system
6. Adjust air regulator valve to give an air pressure
gauge reading of zero –pump stops operating.
7. Close the return to tank valve.
8. Open air regulator valve so that pump operation
starts.

L4383. .7
9. Adjust air regulator valve until the required stall
pressure on “high pressure” gauge is reached.
10. CLOSE the on/o (air flow) valve in to the
VERTICAL position
11. SLOWLY open the return to tank valve
6.0 SERVICING THE HYDRAULIC PUMP UNIT
Hydraulic equipment must only be serviced by a
qualified hydraulic technician. For repair service, contact
the Enerpac Authorized Service Centre in your area.
7.0 SERVICING INSTRUCTIONS
Refer to the RPS for Enerpac Air Pump D3001A0115AA
for part numbers {item #} and cross section {figure #}
of the pump.
7.1 To Disassemble the Motor
1. Remove the eight 5/16” bolts assemblies {items
1, 19, 22, 24; figure 5} that clamp the Air Cylinder
{item 3; figure 5} between the head Casting {item
12; figure 5} and the Air Cylinder End {item 2;
figure 5}. Remove the Head by tapping on a fitting
screwed into either the “AIR IN” or “AIR OUT” ports
with a soft hammer.
2. Remove the Retaining Ring {item 21; figure 5}
from the bottom of the Air Piston {item 4; figure 5}
and remove the Hydraulic Piston. The Pilot Valve
Assembly {item 13; figure 5} may then be pushed
out through the bottom of the Air Piston.
3. Remove the Retaining Ring {Item 18; figure 5} from
the Head assembly. Remove the Bearing Assembly
{item 7; figure 5} by lifting or prying it out with a
hammer handle or similar tool. The Air Piston
Actuating Valve, (part of item 9; figure 5, Valve
Assembly) may also be removed at this time. The
Bearing Assembly has a moulded rubber seat and
should be replaced if worn or damaged. The “O”
Ring {item 20; figure 5} in the Bearing Assembly,
the “O” Ring {item 16; figure 5} in the upper part
of the Air Piston Actuating Valve, and the “O”
Ring * on the Pilot Valve Assembly Head should
be replaced as a routing matter while the pump is
disassembled as they are especially important for
maximum performance.
4. The Head has a Rubber Bumper {item 15; figure 5}
inserted in the upper portion of the body. This acts
as an air seal and also a cushion for the Air Piston
Actuating Valve. If worn or damaged it should be
replaced
When worn or damaged the Air Piston Actuating
Valve and the Sleeve in which it operates are supplied as
a Valve Assembly, {item 9; figure 5}. The sleeve may be
removed from the Head Casting by means of an internal
puller engaging the slots in the sleeve. Install a new set
of “O” Rings {included as part of recommended seals
spare kit D3001A0100SK} (4 required and included
with Valve Assembly when ordering as a replacement
part). Also coat the “O” Rings and the Sleeve O.D. with
Petroleum Jelly or other suitable lubricant to avoid
possibility of damage to the “O” Rings when installing
the new Sleeve.
DO NOT remove the sleeve from the Head
Casting unless replacement is to be made. The Valve
Assembly is precision ground and honed to very close
tolerances and the Sleeve may be damaged when
removed from the Head Casting.
NOTICE
CAUTION

8L4383
7.2 Repairing The Pilot Valve Assembly
1. The Pilot Valve Assembly, {figure 7}, has an Air
Check Assembly, {item 6; figure 7}, located in the
lower end.
2. Remove the Retaining Ring, {item 1; figure 7}, which
locks the Valve Seat, {item 7; figure 7}, in place and
remove the Valve Seat with a spanner wrench.
3. The Air Check Assembly, and the Spring, {item 4;
figure 7}, will then drop out and may be inspected
for wear or damage. Replace the springs and worn
parts as required.
4. When installing the Spring, {item 7; figure 8}, in
the Air Check Assembly {figure 8}, the assembly
should be screwed together until the component
parts are drawn up just snugly with no travel in the
bolt assembly and then the nut should be backed
o ONE COMPLETE TURN for proper adjustment.
5. When the assembly adjustment has been done
correctly, the valve will open approximately 1/32
inch when the bolt assembly is depressed to open
the valve.
7.3 To Replace the Packing in the Hydraulic
Cylinder
It is not necessary to dismantle the Air Motor. Proceed
as follows.
1. Disconnect the Air Supply Line, remove the muer
if necessary and loosen the Set Screw in the Air
Cylinder End {item 25; figure 5}.
2. Unscrew the Air Motor from the Hydraulic Cylinder.
The Hydraulic Piston will be removed with the Air
Motor, permitting convenient replacement of the
packing in the Hydraulic Cylinder.
3. Replace the Backup Rings and the “O” Rings. The
Parts List will give the size and kind of packing
required, and when installing the new packings, be
sure that the Backup Rings are properly in place.
If they are damaged or not installed correctly, the
“O” Ring will malfunction, with resultant loss of
pressure and packing failure
4. When replacing the Air Motor, install a new Gasket
{item 9; figure 6} and see that the Hydraulic Piston
is in proper alignment before screwing the Air Motor
down into position. Tighten the Air Motor securely
and also the Set Screw {item 25; figure 5} in the Air
Cylinder End.
Models with Isolator Attachment or “V” Ring
packing in the Hydraulic Cylinder will require removal
of the Isolator or the Adaptor on the “V” Ring packed
cylinders to replace packings.
NOTICE
7.4 The Hydraulic Piston
This has a Rubber Bumper, {item 16; figure 6}, in the
Head. If replacement is required remove capscrew and
install new Rubber. Apply “LOCTITE” sealant to the
capscrew threads when replacing and tighten securely,
but not to exceed five foot pounds of torque.
NOTE The Piston Stem is chrome plated, honed
and lapped to a very close tolerance with the Hydraulic
Cylinder. Should it show indications of wear or being
scored (usually due to foreign matter being present
in the hydraulic fluid), the entire Hydraulic Piston and
Cylinder Assembly, {figure 6}, should be returned to the
factory, for repair or replacement as required.
7.5 Repairing or Replacing the Hydraulic Check
Values
These Valves should not give any trouble unless foreign
matter such as dirt or grit are present in the fluid supply.
If a leak develops remove the Check Valves from the
Hydraulic Cylinder. Remove the “O” Rings and replace
with a new one. Inspect the ball seat in the Valve while
the “O” Ring is removed. If it shows any indication of
wear or damage, the entire Valve Assembly should
be replaced. Refer to the RPS for Enerpac Air Pump
D3001A0115AA for part numbers {item 6} and cross
section {figure 7} of the Valves.
1. When operations described in paragraphs 7.1
through to 7.2 have been completed, the entire
unit will have been dismantled and all parts
inspected for wear and damage. It is especially
important that all parts that operate in “O” Rings
or Packing be free from pits, scoring, or any other
defects that may cause excessively rapid wear of
“O” Rings and Packing, since leaks will develop
almost immediately under these conditions and
satisfactory performance will not result.
7.6 Reassembling the Pump
Reverse the procedure used for dismantling, making
sure that all Retaining Rings are properly in place and
that no “O” Rings have been damaged in reassembly.
When reassembling the Air Motor be sure that
the Air Cylinder, {item 3; figure 5} is in proper position
against the flanges on the Pump Head and the Air
Cylinder Ends before tightening the bolts that clamp the
Air Motor together. Use a soft hammer to position the
flanges tightly against the Air Cylinder Ends BEFORE
tightening the bolts. Failure to do this can result in over-
tightening the bolts initially and when the bolts on the
opposite side are drawn up this may result in the bolt
lugs being broken or twisted o when the assembly
is drawn down into position. Bolts should be secured
lightly at first then drawn up in sequence until uniform
torque has been applied to all of the bolts around the
perimeter of the pump (10-12 foot lbs).
NOTICE
CAUTION

L4383. .9
7.7 Pump Not Running Properly
It is not necessary to dismantle the Air Motor. Proceed
as follows. If for any reason the pump does not run
properly, look for one of the following causes.
1. If the pump appears to be short stroking and
running too fast without pumping properly, it
usually indicates that the Air Check Assembly is
not working as it should be. (See section 7.2 for
correction procedure). Refers to hydraulic check
value repairing or replacement.
2. Loss of pressure may be caused by one of two
reasons:-
i. the Hydraulic Check Valves have developed a
leaky condition or
ii. the hydraulic fluid is bleeding past the packing
in the Hydraulic Cylinder. (See section 7.3 to
7.5 for repair instructions). Refers to hydraulic
packing replacement.
3. Should the pump commence to run erratically and
in a jerky manner after a period of time, it is usually
an indication that a seizing action is taking place in
the Hydraulic Piston and Cylinder Assembly. (See
section 7.1 and 7.3 for disassembly instructions).
This is usually caused by foreign matter such as
alkali, dirt, grit or chemicals that do not have
sucient lubrication qualities being present in the
fluid supply. If the Hydraulic Piston and Cylinder
have not been damaged, a thorough cleaning will
normally place the pump in operation again.
4. For maximum volume of flow, make sure that
a sucient flow of air is supplied to the pump.
Hooking the pump up to a smaller pipe size than
the “AIR IN” port on the pump will not allow it to
run at its full rated capacity. Long runs of relatively
small pipe supplying air to the pump will have the
same eect.
5. If an excessive amount of oil or water is coming
through the pipe air exhaust, check the following:-
a. The Lubricating Unit in the air supply is
delivering too much oil. Adjust to about one
drop of oil for every 20 strokes of the pump.
b. The Filtering Unit in the air supply is not
functioning properly. The bowl should be
cleaned periodically to assure delivery of clean
air to the pump.
c. The Hydraulic Fluid being pumped (oil or water)
may be leaking past the packing in the Hydraulic
Cylinder into the Air Motor. (See section 7.3 for
correction procedure).
8.0 STORAGE AND SPARES
8.1 Reassembling the Pump
Hydraulic Harness and Fittings
1. Wipe all hoses clean and apply a light coating of oil
or suitable rust inhibitor to all nipples, couplings,
and tee blocks.
2. Always keep dust caps fitted to nipples and
couplings when hoses are not in use.
Air Driven Pump Unit
1. Always store the pump upright.
2. Apply light oil coating or suitable rust inhibitor to all
exposed un-plated metal items.
3. Leave the oil Return-To-Tank valve in the open
position.
4. Leave the air control valve in the open position.
5. Always keep dust covers on inlet/outlet hydraulic
fittings.
8.2 RECOMMENDED SPARES
Complete Seal Kit for Air Motor & Hydraulic Assembly:
D3001A0100SK

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