GREAT PLAINS PA-120DEF Manuale d'uso - Pagina 9

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GREAT PLAINS PA-120DEF Manuale d'uso
TROUBLESHOOTING – P-120DEF
SYMPTOM
A. MOTOR DOES NOT
RUN
B. MOTOR RUNS BUT
DOES NOT PUMP
FLUID
C. LOW FLOWRATE
D. RAPID OVERHEATING 1. Duty cycle too long
OF MOTOR
PROBABLE CAUSE
1. Fuse blown
2. Switch defective
3. Motor burned out
1. System air leak
2. Drive key broken
3. Strainer clogged
4. Gear coverplate O-ring worn
5. Bypass poppet stuck
6. Suction pipe clogged,
damaged or missing
7. Gear drive shaft broken
8. Gear wear
1. Low voltage or poor
connections
2. Strainer partially clogged
3. Suction pipe clogged or
damaged
4. Bypass poppet stuck
5. Gear wear
6. Discharge hose too long
7. Power cord too long
2. Strainer clogged
CORRECTIVE ACTION
Inspect fuse. If blown, replace.
Remove switch coverplate and inspect switch. Replace, if necessary.
Remove motor from pump and test by connecting to 12-volt DC power
supply. Replace if necessary.
Make sure all fittings and connections are tight. Inspect suction pipe, bung
adapter and pump inlet seals for leaks or damage.
Replace key.
Remove coverplate. Clean strainer. Install again.
Remove coverplate. Inspect O-ring and replace if worn or damaged.
Remove poppet and clean. Install again.
Remove pump. Inspect suction pipe and clean or replace, as necessary.
Remove coverplate, gears, and motor. Remove and inspect drive shaft.
Replace, if necessary.
Remove the coverplate and inspect gears, and drive key. Gears must turn
freely with the drive key removed. Replace any worn or damaged parts.
Check for adequate battery voltage and good terminal connections.
Remove coverplate. Clean strainer. Install again.
Remove pump from tank. Inspect suction pipe and clean or replace, as
necessary.
Remove poppet and clean. Install again.
Remove the coverplate and inspect gears, and drive key. Gears must turn
freely with the drive key removed. Replace any worn or damaged parts.
Long hoses reduce flowrate. Shorten hose.
Long cords reduce flowrate. Shorten cord.
Do not exceed the standard duty cycle of 30 minutes ON and 30 minutes
OFF. Allow the pump to cool for 30 minutes.
Remove coverplate. Clean strainer. Install again.
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