Page Number - 7
Form 403750
FlowMaster™ Rotary Driven Hydraulic Pump
7.5A-18100-J03
Troubleshooting
Condition
Possible Cause
Corrective Action
Pump does not run.
No pressure on gauge (72):
- Closed Supply line shut off valve.
Open shut-off valve.
- No power to solenoid valve (73).
Correct electrical fault.
- Faulty Solenoid (74).
Replace solenoid (74).
- Pressure Reducing Valve (77) is
Reset Pressure Reducing Valve (77).
set too low.
,QVXI¿FLHQW+\GUDXOLF)OXLGVXSSO\
Check hydraulic supply for proper
SUHVVXUHDQGÀRZ
Pressure is shown on gauge (72):
- 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.
3XPSLVVHL]HGRUGDPDJHG
Dismantle the pump and repair
GHIHFWLYHRUVHL]HGFRPSRQHQW6HH
disassembly and assembly
procedure.
Pump speeds up or runs erratically.
Low level of grease or reservoir
5H¿OOUHVHUYRLU
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.
,QVXI¿FLHQWK\GUDXOLFÀXLGVXSSO\
Check hydraulic supply and adjust
ÀRZXVLQJYDOYH
Inlet pressure too low.
Increase pressure using valve (77).
Faulty inlet (25, 27) , faulty discharge
Replace faulty components.
check (18, 19) or damaged O-ring (26).
Weepage from housing cover 30.
Cup seal (15) or O-Ring (13b) wore out.
Check the seals and replace if
necessary.
Pump becomes noisy.
No crank case oil.
Add crank case oil. Remove Pipe
Plug (67a) from Pump Housing (67).
Oil level should be at the bottom of
the Pipe Plug opening.
Worn wrist pin bushing (12).
Check the bushings and replace if
necessary.
Pump does not build pressure.
Foreign material holding lower
Dismantle & clear check. Consider
check open.
installing strainer 272180©
before returning pump to service.
