Product Manual
5922106-01E PRO25-012 / PRO25-024
SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION
A MOTOR DOES NOT RUN
1. Wiring problem Conrm all connections are tight and correct voltage is getting to the pump.
2. Fuse blown Inspect fuse in fuse holder on power cord. If blown, replace.
3. Rotor or vanes jammed Remove coverplate to expose rotor. Remove any obstructions. Check for
excessive vane and slot wear. If damaged, replace.
4. Circuit breaker switch defective Replace switch
5. Motor bad Contact the factory.
B. MOTOR RUNS,
BUT NO FLOW
1. Tank level low Add fuel to tank.
2. Clogged lter assembly Remove and clean lter assembly or replace.
3. Suction line problem Remove suction pipe and remove any obstructions.
4. Broken motor shaft key Replace shaft key in end of shaft. Check slot and vane for excessive wear.
Remove any obstructions.
5. Bypass poppet stuck open Remove bypass poppet and clean. If damaged, replace.
6. Motor running backwards Check wiring to conrm correct polarity.
C. PUMP FAILS TO PRIME
1. Air leak in system Check for air leaks at all joints. Reseal and tighten.
2. Bypass poppet stuck open Remove bypass poppet and clean. If damaged, replace.
3. Vanes worn or sticking Check slots and vanes for excessive wear or damage. If damaged, replace.
4. Motor runs backwards Check wiring to conrm correct polarity.
D. LOW FLOWRATE
1. Low voltage Check battery voltage. Conrm voltage is correct.
2. Wiring problem Conrm correct polarity and all connections are tight. Conrm wire
size is correct and not too small.
3. Clogged lter assembly Remove and clean lter assembly or replace.
4. Air leak in system Check for air leaks at all joints. Reseal and tighten.
5. Bypass poppet stuck open Remove bypass poppet and clean. If damaged, replace.
6. Vanes worn or sticking Remove any obstructions. Check rotor slots and vanes for exces-
sive wear. Replace if damaged.
7. Outlet is blocked Check all accessories for blockage. Remove any obstructions.
8. Clogged or broken suction pipe Remove pump and clear suction pipe, replace as needed.
9. Fuel level low Fill tank.
10. Using off-the-shelf automatic
nozzle
Factory-supplied automatic nozzle is recommended.
11. Hose damaged Replace hose.
E. MOTOR STALLS WHEN
NOZZLE IS CLOSED
1. Bypass poppet stuck closed Remove bypass poppet and clean or replace as needed.
2. Rotor or vanes worn Check rotor and vanes for excessive wear. Replace as needed.
3. Low voltage Check incoming battery voltage and tighten wiring connections.
4. Motor defective UL Listing requires specic treatment for motor replacement,
contact factory.
F. FUEL LEAKAGE
1. Threaded joints loose Check and reseal threaded joints.
2. Insufcient bolt torque Retighten bolts.
3. Lost or damaged O-rings Check O-rings for damage. Replace as needed.
4. Shaft seal worn or damaged Fuel leaking from drain hole indicates shaft seal needs to be
replaced.
5. Hose damaged Replace hose.
TROUBLESHOOTING
Observe precautions against electrical shock when servicing the
pump. Always disconnect power before repairing or servicing.
Never apply electrical power to the system when any of the cov-
erplates are removed.
WARNING
Avoid prolonged skin contact with petroleum fuels. Use protective
goggles, gloves and aprons in case of splashing or spills. Change
saturated clothing and wash skin promptly with soap and water.
CAUTION
a soft-bristled brush and solvent. If the strainer is very
dirty, compressed air may be used. If damaged, replace
the strainer.
Replace components making sure that they are seated
and fasteners are tightened securely.
REPAIR
Carefully inspect all parts for wear or damage. Replace
components, as necessary. The Illustrated Parts List
gives information on replacement parts and kits.
Review the Safety Instructions before proceeding.