Sam SP User manual

SP
Installation, Operation and Maintenance Manual
SAM Engineering (Pty) Ltd.
24 Duncan Road, Lilianton,
Boksburg, South Africa
Tel: [phone]
Fax: [phone]
Email: [e-mail]
www.sameng.co.za
Alloys to suit all applications
Proud Manufacturers of SAMCO®Pumps

Contents
TYPE: SP 3
OPERATING INSTRUCTIONS 3
GENERAL 3
LOCATION 3
CONNECTIONS 4
ROTATION 4
AIR RELEASE LINE 4
STARTING 5
LUBRICATION 5
FLEXIBLE COUPLINGS 6
TYPES OF MISALIGNMENT 6
COUPLING ALIGNMENT 6
GROUTING 6
FINAL CHECK OF ALIGNMENT 6
V BELT ALIGNMENT 6
CHECK SHEAVE MOUNTING AND ALIGNMENT 7
V BELT DRIVE TENSIONING METHOD 7
IMPELLER RUNNING CLEARANCE 8
SHAFT AND BEARING REPLACEMENT 8
CLEANING OR REPLACING CHECK VALVE 8
CLEANING IMPELLER 8
DISASSEMBLY 9
IMPELLER NUT INSTALLATION TORQUE 10
TROUBLE SHOOTING 10-11
NOTE:
The information contained in this book is intended to assist operating personnel by providing
information on the characteristics of the purchased equipment.
It does not relieve the user of their responsibility of using accepted engineering practices in the
installation, operation, and maintenance of this equipment.
Any further questions, contact SAM Engineering (Pty) Ltd [phone].

SP | Location | Connections | Rotation | Piping
3
3. Suction piping should be the same size as the
pump inlet.
4. Any reducer should be of the eccentric type. If
a reducer is used in the horizontal run of
suction piping, it must be used with the flat
part of reducer on the top to avoid air pockets.
5. A horizontal portion of the suction line must
have a gradual rise to the pump from the
source of the liquid being pumped. Any high
point in the suction line will create an air
pocket, and will prevent proper pump
operation and inhibit priming capability.
6. An installation requiring long pipe lines
handling hot or chilled liquids, requires
provisions for relieving the expansion and
contraction of the pipe to eliminate any pipe
stress from acting on the pump casing.
7. It is recommended to use long radius elbows
and eccentric reducers whenever possible.
These types of fittings reduce friction loss.
Tapered reducers should only be used in
vertical suction piping.
8. If a suction strainer is used, it should have
mesh size equal to or less than the solid
handling capability of the pump, and open
mesh area equivalent to a minimum of eight
times the area of the suction pipe size.
9. Before tightening the suction pipe connection
flange, align it exactly with the pump suction
flange. Do not pull a pipe into place by
tightening the flange bolts and/or couplings.
All pipe lines near the pump must be rigidly
supported to avoid strain on the pump, which
may cause excessive vibration, decreased
bearing life and/or increased shaft deflection
and seal wear.
10. If a single suction line is installed into a sump,
it should be installed away from the sump wall
at a minimum distance equal to 11/12 times
the diameter of the suction line. If more than
one suction line is installed in the same sump,
separate the suction lines from each other by a
minimum distance equal to three times the
diameter of the largest suction line.
SAM Engineering (Pty) Ltd SELF-PRIMING
SOLIDS HANDLING PUMPS MOTOR DRIVEN:
LONG COUPLED TYPE: El/EB "SP"
GENERAL
LOCATION
By placing your SAM pump on a firm, level
foundation, you reduce harmful vibrations and
unnecessary noise. Your SAM pump is self-priming
and may be located above the source of liquid
supply. Best pump operation is obtained by
locating the pump as close as possible to the
liquid being handled. Keep in mind a pump can
push liquid more effectively than it can pull or
draw liquid. The actual priming ability of a pump
depends upon many factors such as the size and
layout of the piping, the type of liquid and its
temperature, the specific pump selected and its
speed of operation. Additional priming information
is given in the SAM Engineering Sales Catalogue.
Provide the necessary space around the pump for
future inspection and servicing of the unit.
CONNECTIONS
Connections at the easily accessible suction and
discharge ports can be made either with hose or
pipe. The use of strongly reinforced suction hose
will prevent collapsing of the hose during opera-
tion. New hose washers should be used at the
couplings to prevent trouble causing leaks. All hose
or pipe should be independently, supported to
eliminate excessive strain on the pump.
ROTATION
Your pump is specifically designed to rotate in a
counter clockwise direction when viewing the
motor from the pump end.
PIPING
1. Suction piping should be as short as possible
using the fewest number of elbows and fittings
possible to reduce friction loss and avoid
priming problems.
2. The designer of the piping system must be
sure that the available NPSH of the system
exceeds the required NPSH of the pump.
(Refer to pump performance curve for the
value of the NPSH required by the pump at the
operating point).

SP | Valves | Air Release Line
11. If there is a discharge from an open pipe into
the sump, the flow should be kept away from
the pump's suction pipe. This inflow usually
carries air down into the sump with the liquid.
Liquid with entrained air will increase priming
time and reduce pump efficiency. If the
discharge into the sump is close to the
suction pipe, install a baffle between the inflow
and suction pipe at a distance of at least six
times the diameter of suction pipe away from
the suction pipe. The baffle will allow the air to
escape from liquid before it is drawn into the
suction pipe.
12. The use of bell type increasers at the bottom
of the suction pipe is recommended to
reduce inlet velocity. If this can't be done, cut
the bottom of the suction pipe at a 45° angle
to avoid swirling of liquid.
VALVES
SAM Engineering (Pty) Ltd does not recommend
the use of a valve on the suction line EXCEPT:
a. In cases where positive suction heads are
present in the system or
b. Where it is possible for a positive head to
develop due to flooding conditions.
c. Sometimes it is advisable to have valves on
suction and discharge so that the pump may
be isolated during repair.
In any case, if suction valve is used, install with
stems in horizontal position to avoid air pockets.
1. If throttling valves are necessary in the
discharge line, use a valve size equivalent to
the largest pipe size in the line to minimise
friction loss. Never install a throttling valve in
the suction line.
2. Gate and check valves may be used on the
discharge side, but it is not necessary in low
discharge head applications.
3. It is recommended to use a throttling valve and
check valve in the discharge line to protect the
pump from excessive shock or water hammer
and reversed rotation when pump is stopped.
4. To minimise piping friction losses:
a. Keep discharge line as straight as possible.
b. Use the minimum number possible of
elbows and other pipe fittings.
c. Use long radius elbows and/or eccentric
reducers.
5. Do not terminate the discharge line at a level
lower than that of the liquid being pumped,
unless a siphon breaker is used in the
discharge line. Siphoning action may cause
damage to the pump.
6. If there is a high discharge head, slow
re-priming may be encountered requiring the
use of an air-venting device. If a discharge
check valve is used an air release line must be
incorporated between the discharge check
valve and pump to ensure priming.
7. If the system has a long discharge line it is
recommended to install a siphon breaker to
avoid siphoning out the liquid from pump
casing.
AIR RELEASE LINE
It is essential to allow the air to escape from the
discharge line to atmosphere during the initial
priming and re-priming cycle. In systems with high
discharge heads, it may be advisable to install an
air release line between the pump casing and
discharge check valve to aid their venting. The size
of the air release line is selected so that it does
not significantly affect the discharge capacity. You
may install an air release line through the filler
plug hole if necessary. However, the preferred
location is in the discharge line - between the
pump and the discharge check valve - as close to
the discharge check valve as possible.
We recommend the following line sizes for the
following ITT pumps.
3DTH & 4DTH -19mm Line
6ETH -25.4mm Line
8GTH & 10GTH -31.7mm Line
NOTE:
1. This line size may be increased or decreased
depending on application.
2. Direct the air release line back into the sump
(not into the pump suction line) leave the end
of the line open to atmosphere. Do not sub
merge into the liquid being pumped.
3. The air release line may clog, particularly if a
shut off valve is installed in the line and is
closed during operation. If this condition
occurs, either use a larger line or leave the shut
off valve open during pumping operation. To
aid in maintaining air release lines, fit them
with crosses instead of elbows.
4

SP | Starting | Lubrication | Bearing Cavity Oil Capacity
STARTING
Follow the motor manufacturer's instructions
carefully. Before starting, fill the pump casing with
liquid through the priming plug provided. Your
pump has been designed to prime itself in a few
minutes. High suction lifts require additional time
and reduce the performance of the pump. Should
you have difficulty, refer to the "Trouble Guide"
paragraph.
SAM self-priming pumps prime and re-prime
themselves providing the casing is filled with
liquid. Should you lose this liquid from the casing
accidentally or by draining purposely, it will be
necessary to fill casing with liquid before starting.
Check drive coupling and V belt alignment. (Refer
"coupling alignment" for instructions).
Check motor wiring.
WARNINGS:
All electrical work must be done by a licensed
electrician.
Before working on pump and/or motor be certain
that the electrical power is off at the main junction
box.
Disconnect the fuse or circuit breaker and have the
main switch tagged "DO NOT ENERGISE THIS
SWITCH PERSONNEL WORKING ON EQUIPMENT."
Some motors are equipped with built-in thermal
overloads to shut off the motors in the event the
temperature becoming excessive (as a result of low
voltage, poor ventilation, overloaded lines, etc.)
These motors will restart automatically as the
motor cools down. For safety sake, DO NOT work
on any motor without shutting off the electricity.
Never operate an electric motor driven pump
without properly grounding the motor frame.
Serious injury or death by electrocution could
result.
Drain pump casing completely before taking pump
apart. It is advisable to flush the inside of the
casing with water before taking pump apart.
Never start pump before putting back all necessary
guards such as coupling guard and/or belt guard.
LUBRICATION
Bearing lubrication: (Refer to drawing)
Use good grade SAE #30 non-detergent motor oil.
Units are shipped without oil and must be filled
before starting. Fill bearing housing oil cavity with
oil through "filter" provided on top of bearing
housing nearest motor until oil starts to drip out of
"oil level" hole. ("Oil Level" cast on housing). Install
breather to vent any oil vapour.
Also, provision is made on the housing to install
"constant level oiler." ("Oiler" cast on housing.) This
oiler can be supplied as an optional item. Under
normal service, drain and refill housing cavity oil
yearly. However, oil level should be checked
regularly.
BEARING CAVITY OIL CAPACITY:
3DTH & 4DTH :56 fl. oz.
6ETH :68 fl. oz.
8GTH :68 fl. oz.
10GTH :68 fl. oz.
Seal cavity lubrication
Use good grade SAE #30 non-detergent motor oil.
Fill seal cavity with oil through hole provided on
top of bearing housing nearest pump casing, until
you see oil through hole opening. Install breather
to vent any oil vapour.
NOTE: It is recommended that the seal cavity oil be
drained (through the drain hole) and replaced with
clean grade SAE #30 non-detergent motor oil every
6 months.
The mechanical shaft seal is a wearing part that
will eventually need to be replaced. A leaky seal
must be replaced quickly to prevent damage to the
pump. Any overflow of liquid through the breather
(vented plug) is an indication of a possible seal
failure.
Oil capacity of seal cavity
3DTH :20 fl. oz. minimum
4DTH :20 fl. oz. minimum
6ETH :20 fl. oz. minimum
8GTH :20 fl. oz. minimum
10GTH :20 fl. oz. minimum
Motor bearing lubrication: Follow motor
manufacturer's specification.
5

SP | Flexible Couplings | Misalignment | Alignment
FLEXIBLE COUPLINGS
A flexible coupling should not be used to compen-
sate for misalignment of the pump and driver
shafts. The purpose of the flexible coupling is to
compensate for temperature changes and to
permit end movement of the shafts without
interference with each other while transmitting
power from the driver to the pump.
TYPES OF MISALIGNMENT
There are two forms of misalignment between the
pump shaft and the driver shaft, as follows:
1. Angular misalignment-shafts with axes
concentric but not parallel.
2. Parallel misalignment-shafts with axes parallel
but not concentric.
Angular misalignment
A check for angular alignment is made by inserting
the taper gauge or feelers at four points between
the coupling faces and comparing the distance
between the faces of four points spaced at 90-de-
gree intervals around the coupling. The unit will be
in angular alignment when the measurements
show that the coupling faces are the same distance
apart at all points.
Parallel misalignment
A check for parallel alignment is made by placing a
straight edge across both coupling rims at the top,
bottom and at both sides. The unit will be in paral-
lel alignment when the straight edge rests evenly
on the coupling rim at all positions. Allowance may
be necessary for temperature changes and for
coupling halves that are not of the same outside
diameter. Care must be taken to have the straight
edge parallel to the axis of the shafts. Angular and
parallel misalignment is corrected by means of
shims under the motor mounting feet. After each
change, it is necessary to recheck the alignment of
the coupling halves. Adjustment in one direction
may disturb adjustments already made in another
direction. It should not be necessary to adjust the
shims under the pump.
COUPLING ALIGNMENT
The faces of the coupling halves should be spaced
far enough apart so that they cannot strike each
other when the driver rotor is moved hard over
toward the pump. Due allowance should be made
for wear of the thrust bearings. A minimum dimen-
sion for the separation of the coupling halves is
specified by the manufacturer, usually 3.2mm, the
necessary tools for approximately checking the
alignment of a flexible coupling are a straight edge
and a taper gauge or a set of feeler gauges.
GROUTING
When the alignment is correct, the foundation
bolts should be tightened evenly but not too firmly.
The unit can then be grouted to the foundation.
The base plate should be completely filled with
grout and it is desirable to grout the levelling
pieces, shims or wedges in place. Foundation bolts
should not be fully tightened until the grout is
hardened, usually about 48 hours after pouring.
FINAL CHECK OF ALIGNMENT
After the grout has set and the foundation bolts
have been properly tightened, the unit should be
checked for parallel and angular alignment and, if
necessary, corrective measures taken. After the
piping of the unit has been connected, the align-
ment should be again checked.
V-BELT ALIGNMENT
Although alignment is not as critical in V-belt
drives as in others, proper alignment is essential
for long belt and sheave life. First, make sure that
drive shafts are parallel. The most common causes
of misalignment are nonparallel shafts and
improperly located sheaves. Where shafts are not
parallel, belts on one side are drawn tighter and
pull more than their share of the load. As a result,
these belts wear out faster, requiring the entire set
to be replaced before it has given maximum
service. If misalignment is in the sheave, belts will
enter and leave the grooves at an angle, causing
excessive belt cover and sheave wear.
6

SP | Sheave Mountaing and Alignment | Tensioning
7
CHECK SHEAVE MOUNTING AND
ALIGNMENT
V-Belt drives do not require alignment to as close
tolerances as most other types of drives - but
unless the belts enter and leave the sheaves in a
relatively straight line, wear is accelerated.
The two most common causes of misalignment are
shown: (a) the shafts of the driver and driven
machines are not parallel, and (b) the sheaves are
not located properly on the shafts. To check align-
ment, all you need is a straight edge or, for drives
with longer centres, a steel tape. If these aren't
available, you can, as a last resort, even use heavy
string. Just line the straight edge or tape along the
outside face of both sheaves as shown in the
illustration. Misalignment will show up as a gap in
between the sheave face and straight edge, or
perhaps as a "break" in the tape or string. Make
sure that the width of the outside land is equal on
both sheaves, when using this method.
V-BELT DRIVE TENSIONING METHOD
Before attempting to tension any drive it is
important that the sheaves be properly installed
and aligned. The V-belts should be placed over the
sheaves and in the grooves without forcing them
over the sides of the grooves.
Step 1: With all belts in their proper groove, adjust
the centres to take up all slack and until the belts
are fairly tight.
Step 2: Start the drive and continue to adjust until
the belts have only a slight bow on the slack side
of the drive while operating under load. See
sketch.
Step 3: After a few days of operation, the belts will
seat themselves in the sheave grooves and it may
become necessary to readjust so that the drive
again shows a slight "bow" in the slack side.
The drive is now properly tensioned and should
operate satisfactorily with only an occasional
readjustment to compensate for belt and groove
wear.

SP | Impeller Running Clearance | Shaft & Bearing Replacement
IMPELLER RUNNING CLEARANCE
The impeller running clearance, the distance
between the impeller vanes and wear plate, is
adjusted at the factory prior to shipment to
.020"-.030". To adjust this clearance in the field,
shut down the pump, disconnect power supply to
the pump and use the following instructions.
1. Drain pump casing completely by removing
drain plugs from both suction and discharge
chamber.
2. Remove clean-out cover by unscrewing the two
hand knobs.
3. Reach inside the pump casing through the
cleanout hole with a feeler gage and measure
the gap between the impeller vanes and wear
plate. Measure this gap at each impeller vane.
If this gap is not within the allowable limits of
.020"-.030", adjust this clearance as follows:
a. Unscrew the three jackscrews and jam nuts.
Partially loosen the bearing carrier caps
crews.
b. Adjust the jackscrews and cap screws until
the front clearance between the impeller
vanes and wear plate falls within the
allowable range of .020"-.030". Tightening
the jackscrews will increase the front
clearance and tightening the cap screws will
decrease the front clearance. Tighten one
set of screws and loosen the other to go in
the direction required. Tighten locknut.
Note: Maximum allowable bearing carrier (110)
pull back movement is 1/8", (i.e. from the
condition when impeller is "just" touching the wear
plate you can push back the bearing carrier
assembly by 3.2mm.
SHAFT AND BEARING REPLACEMENT
If shaft or bearing replacement is necessary, follow
these instructions. (Shut down the pump and
disconnect power supply to the pump before
working on pump.)
1. Install the front (impeller end) bearing on the
shaft.
2. Slide the carrier retaining ring onto the shaft.
3. Install the rear (coupling end) bearing on the
shaft.
4. Install the retaining ring onto the shaft (38).
Add shims (107) between the retaining ring
and the bearing if required to lock the bearing
on to the shaft axially.
5. Install O-ring into the bearing carrier groove.
6. Slide the bearing carrier with O-ring over the
rear bearing such that rear bearing slides into
the bearing carrier. Install the retaining ring
(106) in place.
7. Insert shaft assembly with bearings and carrier
into the housing.
CLEANING OR REPLACING CHECK VALVE
(Shut down the pump and disconnect power
supply to the pump before working on the pump.)
Drain pump casing completely by removing drain
plugs. Access to suction check valve can be made
by removing the check valve cover plate from the
top of the suction chamber of pump casing.
Reaching through the check valve cover plate hole,
remove the two shoulder screws and check valve
keeper plate. Now slide off check valve. Pull the
check valve assembly out of the pump casing
through the cover plate hole. Inspect the sealing
surface of the check valve and make sure it is in
good condition and free of debris.
CLEANING IMPELLER
Drain pump casing completely by removing drain
plugs. Remove hand knobs, remove clean-out cover
and using coat hanger, remove debris from the
impeller eye area and if necessary wash it off with
garden hose. Check O-ring on the clean-out cover
replace it if necessary.
8

SP | Dissasembly
DISASSEMBLY
If you need to replace impeller, wear plate, shaft
seal, front oil lip seal, bearing or check valve,
follow these steps:
1. Drain pump casing completely by removing
drain plug from both suction and discharge
chamber.
2. Drain seal cavity oil by removing drain plug
from bearing housing.
Note: A mixture of oil and water does not
necessarily indicate a seal failure. Inspect seal for
damage and replace if needed.
3. Drain bearing cavity oil by removing drain plug.
Note: If oil is mixed with water, shaft seal and front
oil lip seal must be inspected for failure.
4. Remove bearing housing support cap screws
from base.
5. Disconnect coupling or V Belt.
6. Remove cap screws, which holds seal plate to
casing.
7. Pull complete assembly including bearing
housing assembly, seal plate and impeller from
pump casing.
8. Remove impeller nut & impeller washer from
the shaft. Pry out the impeller using wedges
behind the impeller.
Note: Check impeller for any broken vanes or wear.
If it is necessary, replace it.
Refer to impeller-nut torque value before
reinstalling impeller nut.
9. Remove wear plate by removing locknut
through the clean-out cover hole. Check wear
plate for wear. Replace if required.
10. Remove seal assy from seal well as follows:
a. Remove spring and rotating element of the
seal.
b. Pry out the stationary element gently from
the seal cavity by using screw driver. OR if
seal plate is removed from the shaft, the
stationary seal will slide out of the shaft
along with seal plate. Be careful not to
damage stationary element by letting it hit
the shaft.
Note: Before reinstalling seal assy make sure that
the rubber O-ring and both mating silicon-carbide
rings, rubber bellows and shaft surface under seal
are in good condition. Make sure to lubricate with
water before reinstalling. If necessary, replace seal
assembly.
11. Remove cap screws to disassemble bearing
housing from seal plate.
Note: Check gasket - if worn, replace it.
12. Remove the shaft assembly with bearings and
bearing carrier out of the bearing housing.
13. Check both lip seals, replace if necessary.
14. Remove the snap ring from the bearing
carrier which will allow the bearing carrier to
slide off the shaft, along with O-ring.
15. Remove snap ring from the shaft.
16. Check the bearings. If they feel rough when
turning by hand, replace the bearings. Remove
bearings from the shaft using a hydraulic
press.
17. If your pump is supplied with a shaft sleeve,
the sleeve is locked in place with a roll pin and
an O-ring to prevent leakage under the shaft.
To remove shaft sleeve, push the roll pin into
the shaft (shaft has a drilled through hole) and
pull the sleeve from the shaft along with the
O-ring. Push the roll pin out of the shaft. Pump
with slotted shaft sleeve, pull the sleeve along
with O-ring from the shaft. If roll pin is
damaged, pull roll pin out of shaft. Replace
shaft sleeve, O-ring and roll pin if necessary.
Check O-ring and shaft sleeve. If damaged,
replace as necessary. When reinstalling the
sleeve onto the shaft, make sure that the roll
pin is installed flush or max. 0.13mm under
the sleeve O.D.
Follow the above procedure in reverse to
reassemble the pump.
Note: (1) Make sure all gaskets, O-rings, and
sealing surfaces of the check valve are in good
condition before reassembly. Replace as is
necessary.
(2) Make a heavy bead of "GASKET ELIMINATOR"
Loctite #518 or equivalent all around the outer
edge, inner edge and around the mounting holes
on the wear plate before reinstalling wear plate
onto the pump casing for sealing.
9

3DTH
4DTH
6ETH26
8GTH8
10GTH9
6ETH28
8GTH14
25.4mm-14 Esna Nut (Short)
25.4mm-14 Esna Nut (Short)
25.4-14 Esna Nut (Short)
25.4-14 Esna Nut (Short)
25.4-14 Esna Nut (Short)
25.4-12 Esna Nut
25.4-12 Esna Nut
125-150 ft. Ibs
125-150 it. Ibs
125-150 ft. Ibs
125-150 it. Ibs
125-150 ft. Ibs
150-175 ft. Ibs
150-175 ft. Ibs
IMPELLER NUT INSTALLATION TORQUE
Use following impeller nut torque value during installation:
NOTE: Before installing impeller onto the shaft, apply coat of Loctite grade 242 into the impeller bore to help prevent
corrosion.
TROUBLE SHOOTING
Between regular maintenance inspections, be alert for signsof motoror pump trouble. Common symptoms are listed
below. Correctany trouble immediately and AVOID COSTLY REPAIR AND SHUTDOWN.
Will not prime
Suddenly stops pumping
SP | Impeller Nut Installation Torque | Trouble Shooting
10
Pump Model Nut Size Torque Value
CAUSES CURES
1. No liquid in pump casing.
2. Loose suction inlet and/or
suction check valve cover
plate.
3. Worn suction inlet gasket
and/or cover plate gasket.
4. Loose suction chamber drain
plug.
5. Worn pump shaft seal assy.
6. Loose clean out cover and/or
worn clean out gasket.
7. Air release line clogged.
Fill pump casing with liquid being pumped.
Tighten bolts.
Replace with new gaskets.
Tighten plug, use pipe dope or Teflon tape.
Install new seal
Replace with new gasket and tighten hand knobs.
Clean air release line.
Clogged suction line or suction
strainer.
Clean suction line and strainer.

SP | Trouble Shooting
Stops pumping until motor is stopped and re-started
CAUSES CURES
Collapsing suction hose lining. Replace suction line and strainer.
Slowly stops pumping
1. Clogged impeller, volute
suction line or check valve.
2. Loose clean out cover.
Clean out debris from impeller eye area, suction check valve.
(Follow instructions on other pages)
Clean sealing surface and o-ring gasket and tighten hand knobs.
Excessive leakage (oil and liquid being pumped) through seal cavity vented hole
Worn pump shaft seal. Replace seal (follow instructions on other page).
Will not hold prime
1. Dislodged or worn check valve.
2. Loose cleanout cover.
3. Loose check valve cover plate.
Clean or replace check valve – clean sealing surface.
Check gasket, replace if necessary. Tighten cover plate.
Check gasket. Replace if necessary. Tighten cover plate screws.
Poor performance
1. Dislodged or worn check valve.
2. Motor not up to speed:
a. Low voltage
b. Worn bearings.
3. Excessive clearance between
impeller and wear plate.
Install new impeller, seal or wear plate.
a. Larger lead wires required.
b. Replace or rebuild.
Adjust to 0.5mm to 0.7mm clearance. (Follow instructions on
other pages)
Noisy operation
1. Worn motor bearings.
2. Low discharge head.
3. Impeller clogged.
4. Worn coupling or
misalignment.
5. Units opening at extreme left or
right end of performance curve
(capacity too high or too low).
Replace.
Throttle discharge.
Remove clean-out cover and clean impeller.
Replace or realign coupling.
Adjust for best performance point of operation.
11

SAM Engineering (Pty) Ltd.
24 Duncan Road, Lilianton, Boksburg, South Africa
Tel: [phone] | Fax: [phone]
Email: [e-mail]
www.sameng.co.za