FlowMaster™ Rotary Driven Hydraulic Pump
Series “A”
Page Number - 10
7.5A-18100-A98
Form 402864
Lincoln Industrial
25 International Business Park
#01-68 German Centre
Singapore 609916
(+65) 562-7960
Lincoln Industrial
One Lincoln Way
St. Louis, MO 63120-1578
(+1) 314 679 4200
www.lincolnindustrial.com
Lincoln GmbH
69190 Walldorf
Heinrich-Hertz Strasse 2-8
(+49) 6227 33-0
Printed in the U.S.A
.
Copyright 1999
Troubleshooting
Condition
Possible Cause
Corrective Action
Pump does not run.
No pressure on gauge (32):
- Closed Supply line shut off valve.
Open shut-off valve.
- No power to solenoid valve (34).
Correct electrical fault.
- Faulty Solenoid (35).
Replace solenoid (35).
- Pressure Reducing Valve (38) is
Reset Pressure Reducing Valve (38).
set too low.
- Insufficient Hydraulic Fluid supply.
Check hydraulic supply for proper
pressure and flow.
Pressure is shown on gauge (32):
- Closed fluid outlet line.
Check outlet line and clear
obstructions.
- Flow Control Valve is fully closed.
Readjust valve to 3/4 turn open.
- Pump is stalled due to grease
Check vent valve in system.
backpressure.
- Pump is stalled due to grease
Check vent valve in system.
backpressure.
Pump is seized or damaged.
Dismantle the pump and repair
defective or seized component. See
disassembly and assembly
procedure.
Pump speeds up or runs erratically.
Low level of grease or reservoir
Refill reservoir.
is empty.
Follower plate is stuck and separated
Check follower plate and container
from grease.
for damage.
Pump piston or checks are worn.
Disassemble the pump and repair.
Pump runs, but output is low.
Insufficient hydraulic fluid supply.
Check hydraulic supply and adjust
flow using valve 39.
Inlet pressure too low.
Increase pressure using valve 38.
Faulty inlet (25, 26, 27) or discharge
Replace faulty components.
check valve (18, 19, 20).
Weepage from housing cover 30.
Cup seal (16) or O-Ring (48) wore out.
Check the seals and replace if
necessary.
Pump becomes noisy.
No crank case oil.
Add crank case oil. Remove Pipe
Plug (45) from Pump Housing (46).
Oil level should be at the bottom of
the Pipe Plug opening. Add 10W30
motor oil until the crankcase is full.
Worn wrist pin bushing 13.
Check the bushings and replace if
necessary.
To order call 1-800-548-1191 or visit www.partdeal.com - [email protected]
