Product Manual

8 Rev. - 922123-01
SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION
A. MOTOR DOES NOT
RUN
1. Fuse blown Inspect fuse in fuse holder on power cord. If blown, replace.
2. Switch defective Remove switch coverplate and inspect switch. Replace, if necessary.
3. Motor burned out Replace motor as described in the Repair Section.
4. Switch or electrical connections faulty
(Model M-150S and Model M-180S)
Inspect for damaged motor protector, defective wiring or switch, or improper
electrical connections. Replace as needed and re-install.
5. Circuit breaker tripped Turn power off at source. Inspect the pump thoroughly; clean or repair.
Reset circuit breaker by turning the power switch off then back on.
B. MOTOR RUNS BUT
DOES NOT PUMP
1. Suction pipe clogged, damaged, or miss-
ing.
Remove pump from tank. Inspect suction pipe. Clean or replace, as neces-
sary.
2. 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.
3. Strainer clogged or defective Remove strainer coverplate. Remove and clean strainer. Install again.
4. Bypass poppet O-ring worn or missing
Inspect O-ring using instructions in the Repair Section. Replace, if necessary.
5. Bypass poppet O-ring dirty Remove poppet assembly and clean poppet and cavity.
6. Bypass poppet binding or damaged Using instructions in the Repair Section, remove the bypass poppet, spring,
and O-ring. Clean cavity. Inspect and replace components, as necessary.
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 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. Also check battery voltage.
10. Fuel level low Fill tank.
11. Motor running backwards due to incor
-
rect polarity
Connect red wire to positive (+) ungrounded side of battery. Gear with key
should turn counterclockwise.
C. LOW FLOWRATE
1. Poor connections or low voltage Make sure electrical connections are secure. Also check battery voltage.
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. Bypass poppet spring weak Using instructions in the Repair Section, remove the bypass poppet and
inspect spring. Replace, if necessary.
D. MOTOR STALLS
WHEN OPERATING
IN BYPASS MODE
1. Motor protector activated Turn off switch. Allow motor to cool, then turn on switch.
2. Gears locked 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 Using instructions in the Repair Section, 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. SWITCH FAILS TO
OPERATE MOTOR
1. Switch or electrical connections faulty
(Model M-240S)
Inspect for a blown fuse, defective wiring or switch, or improper electrical
connections. Replace or install again, as necessary. Refer to Switch Re-
placement instructions in the Repair Section.
2. Motor burned out Replace motor as described in the Repair Section.
3. Motor protector activated Turn off switch. Allow motor to cool, then turn on switch.
4. Switch or electrical connections faulty
(Models M-150S and M-180S)
Inspect for damaged motor protector, blown fuse, defective wiring or switch,
or improper electrical connections. Replace as needed and re-install.
F. RAPID OVER-
HEATING OF
MOTOR
1. Duty cycle too long Pump operation should not exceed the standard duty cycle of 30 minutes
ON, 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