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FlowMaster™ Rotary Driven Hydraulic Pump
Condition
Pump does not run.
Pump speeds up or runs erratically. Low level of grease or reservoir
Pump runs, but output is low.
Weepage from housing cover 30.
Pump becomes noisy.
Pump dies not build pressure.
Page Number - 10
Troubleshooting
Possible Cause
No pressure on gauge (32):
- Closed Supply line shut off valve.
- No power to solenoid valve (34).
- Faulty Solenoid (35).
- Pressure Reducing Valve (38) is
set too low.
- Insufficient Hydraulic Fluid supply.
Pressure is shown on gauge (32):
- Closed Fluid outlet line.
- Flow Control valve is fully closed.
- Pump is stalled due to grease
backpressure.
Pump is seized or damaged.
is empty
Follower plate is stuck and separated Check follower plate and container
from grease.
Pump piston or checks are worn.
Insufficient hydraulic fluid supply.
Inlet pressure too low.
Faulty inlet (25, 26, 27) or discharge
check valve (18, 19, 20).
Cup seal (16) or O-Ring (48) wore out. Check the seals and replace if
No crank case oil.
Worn wrist pin bushing 13.
Foreign material holding lower
check open.
7.5A-18100-G01
Corrective Action
Open shut-off valve.
Correct electrical fault.
Replace solenoid (35).
Reset Pressure Reducing Valve (38).
Check hydraulic supply for proper
pressure and flow.
Check outlet line and clear
obstructions.
Readjust valve to 3/4 turn open.
Check vent valve in system.
Dismantle the pump and repair
defective or seized component. See
disassembly and assembly
procedure.
Refill reservoir.
for damage.
Disassemble the pump and repair.
Check hydraulic supply and adjust
flow using valve 39.
Increase pressure using valve 38.
Replace faulty components.
necessary.
Add crank case oil. Remove Pipe
Plug (45) from Pump Housing (46).
Oil level should be at the bottom of
the Pipe Plug opening. For Models
85480, 85481, 85482, 85483 and
85247Add 10W30 motor oil until
the crankcase is full.
For Model 85610, add light weight
Mobil Arrow HFA Hydraulic Oil until
the crankcase is full.
Check the bushings and replace if
necessary.
Dismantle & clear check. Consider
installing inlet screen 272180
before returning pump to service.
Form 403139
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