Product Manual
9
SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION
A. MOTOR DOES 1. Auxiliary temperature-limiting Turn pump switch off. Allow motor to cool approximately 30 minutes. Device
NOT RUN device tripped resets automatically. Try again.
2. Switch’s circuit breaker tripped Turn power off at source. Determine source of high amp draw. Correct
problem. Make sure pump switch is in off position before restoring power.
Restore power to pump. Circuit breaker is reset manually by turning pump’s
power switch off and on.
3. Switch defective Remove switch coverplate and inspect switch. Replace, if necessary.
4. Motor burned out Replace motor as described in the Repair Section.
B. MOTOR RUNS BUT 1. Drive key broken Remove gear coverplate and replace drive key. Make sure gears turn freely
DOES NOT PUMP with the key removed.
2. Suction pipe clogged, damaged, or Remove pump from tank. Inspect suction pipe. Clean or replace, as
missing necessary.
3. Gear coverplate or O-ring damaged Remove and inspect the coverplate and O-ring. Replace, as necessary.
Refer to the Repair Section on Servicing O-rings.
4. Strainer clogged or defective Remove strainer coverplate. Remove and clean strainer. Install again.
5. Bypass poppet O-ring worn or Inspect the O-ring, using instructions in the Repair Section. Replace, if necessary.
missing
6. Bypass poppet O-ring dirty Remove poppet assembly and clean poppet and cavity.
7. System air leak Tighten all pump ttings and connections. Inspect suction pipe for leaks or damage.
8. System air lock This can occur if external lter, meters, or an off-the-shelf automatic nozzle
is being used. To correct, remove the pipe plug in the top outlet port and ll the
gear cavity with fuel. Use of a factory-supplied automatic nozzle is recommended.
9. Poor connections or low voltage Make sure electrical connections are secure. Check power source.
10. Fuel level low Fill tank.
11. Bypass poppet binding or damaged Remove the bypass poppet, spring, and O-ring. Clean cavity. Inspect and
replace components, as necessary.
C. LOW FLOWRATE 1. Poor connections or low voltage Make sure electrical connections are secure. Also check power source.
2. Strainer partially clogged Remove the strainer coverplate. Remove and clean the strainer. Install again.
3. Suction pipe clogged or damaged Remove pump from tank. Inspect suction pipe. Clean or replace, as
necessary.
4. Fuel tank empty Fill tank.
5. Using off-the-shelf automatic nozzle Factory-supplied automatic nozzle is recommended.
6. System air leak Tighten all pump ttings and connections. Inspect suction pipe for leaks or
damage. Replace, as necessary.
7. Suction pipe too close to tank bottom Suction pipe must have at least 1/4 in. (0.6 cm) clearance from bottom of the tank.
8. Bypass poppet spring weak Remove the bypass poppet and inspect spring. Replace, if necessary.
9. Discharge hose too long Long hoses reduce ow rate. Shorten hose.
D. MOTOR STALLS 1. Running too long in bypass mode Limit bypass operation to 10 minutes.
2. Gears worn Remove gear coverplate and inspect gears and drive key. Make sure gears
turn freely with the key removed. Replace, if worn.
3. Wiring defective Use Wiring instructions in the Installation Section to ensure proper
connections.
4. Bypass poppet binding or damaged Remove the bypass poppet, spring, and O-ring. Clean cavity. Inspect
components and replace, as necessary.
5. Motor defective Replace motor as described in the Repair Section.
E. RAPID OVERHEAT- 1. Duty cycle too long Pump operation should not exceed the standard duty cycle of 30 minutes ON,
OF MOTOR and 30 minutes OFF. Allow the pump to cool for 30 minutes.
2. Strainer clogged Remove strainer coverplate. Remove and clean strainer. Install again.
3. Suction pipe clogged or damaged Remove pump from tank. Inspect suction pipe. Clean or replace, as
necessary.
4. Gears worn Remove gear coverplate and inspect gears and drive key. Make sure gears
turn freely with key removed. Replace, if necessary.
5. Fuel level low Fill tank.
6. Running too long in bypass mode Limit bypass operation to 10 minutes.
TROUBLESHOOTING
FLUID
WHEN OPERATING
IN BYPASS MODE