Page Number - 10
Form 403751
FlowMaster™ Rotary Driven Electric Pump
Troubleshooting
Condition
Possible Cause
Corrective Action
Pump does not run.
Pump is seized or damaged.
Dismantle the pump and repair
defective or seized component.
See disassembly and assembly
procedure.
Incorrect polarity.
Check to ensure red motor lead is
connected to the positive battery terminal.
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.
Pump speed set too low.
Increase motor speed setting.
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 crankcase
cover (30) from Pump Housing (67).
Oil level should be at the middle of
the crankshaft (37). Check dipstick (30a)
to verify.
If unit is used in cold climates, use
Mobil Arrow HFA Hydraulic Oil in
crankcase.
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 inlet screen 272180
before returning pump to service.
Motor runs, but no pump outlet. Gearset or adapter shaft stripped or Dismantle and replace damaged
broken.
part.
