Multiquip QP4TH manual Troubleshooting ENGINE/PUMP, Pump Troubleshooting

Page 27

TROUBLESHOOTING (ENGINE/PUMP)

Table 7. Engine Troubleshooting

Symptom

Possible Problem

Solution

Operation not satisfactory

 

 

 

Governor adjustment improper?

Adjust governor to correct lever.

Rotational speed fluctuates.

Governor spring defective?

Clean or replace ignition.

Fuel flow erratic?

Check fuel line.

 

 

Air taken in through suction line?

Check suction line.

Recoil starter not working properly.

Dust in rotating part?

Clean recoil starter assembly.

Spring failure?

Replace spiral spring.

 

Table 8. Pump Troubleshooting

 

Symptom

Possible Problem

Solution

 

 

 

Not enough priming water in the housing?

Add water.

 

 

 

Engine speed too low?

Increase throttle.

 

 

 

Strainer plugged?

Clean strainer.

 

 

 

Suction hose damaged?

Replace or repair hose, and clamps.

 

 

 

 

 

 

 

 

Air leak at suction port?

Check that fittings are tight and properly

 

 

 

sealed.

 

 

Pump does not take

 

 

 

Pump is located too high above water line?

Move pump closer to water.

 

 

on water.

 

 

 

Debris collecting in pump housing?

Clean pump housing.

 

 

 

Too much distance between impeller

Adjust clearance by adding shims or

 

 

 

and volute.

replace impeller. Min. .006" - Max. .020".

 

 

 

Water leaking out weep hole between pump

Check condition of mechanical seal and

 

 

 

gaskets, between pump end and engine

 

 

 

and engine?

housing.

 

 

 

 

 

 

 

Engine speed too low?

Increase throttle speed.

 

 

Pump takes in water, little or

 

 

 

 

Suction strainer partially plugged?

Clean strainer.

 

 

no discharge.

 

 

 

 

Impeller/Volute worn?

Adjust clearance by adding shims or

 

 

 

 

 

 

replace impeller/volute.

 

 

 

 

 

 

 

Fittings/clamps are not sealed properly?

Tighten, replace or add clamp. (Keep

 

 

 

extra seals on pump).

 

 

Suction hose leaks at inlet.

 

 

 

Hose diameter is too large?

Use smaller diameter hose or replace

 

 

 

 

 

 

hose.

 

 

 

 

 

 

Discharge does not stay on

Pressure too high?

Check pressure, add additional clamp.

 

 

coupling.

Hose kinked or end blocked?

Check hose.

 

 

 

 

 

 

 

 

Impeller jammed or blocked?

Open pump cover and clean dirt and

 

 

 

debris from inside housing.

 

 

Impeller does not turn:

 

 

 

Impeller and volute binding?

Adjust clearance by removing shim from

 

 

pump is hard to start.

 

 

behind impeller.

 

 

 

 

 

 

 

Defective engine?

See Engine Owner's Manual.

 

 

 

 

 

 

 

 

 

 

 

QP4TH TRASH PUMP • OPERATION AND PARTS MANUAL — REV. #3 (01/29/14) — PAGE 27

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Contents This Manual Must Accompany the Equipment AT ALL Times Model QP4THProposition 65 Warning QP4TH Trash Pump Operation and Parts Manual REV. #3 01/29/14 QP4TH Centrifugal Pump Table of ContentsOrdering parts has never been easier Parts Ordering ProceduresSafety Messages Safety InformationSerious damage to the equipment or engine General SafetyPump Safety „ Never open the priming plug when pumpEngine Safety Fuel SafetyBefore servicing equipment Battery Safety Electric Start only Transporting Safety„ Use well-insulated gloves when picking up the battery Label must remain with the engine for its entire life Emissions InformationModel Specifications PumpSpecifications Pump Dry Net WeightSpecifications Engine Specifications EnginesHonda GX340K1QA2 General Information Discharge Port Connect a 4-inch discharge hose to this port Pump ComponentsBasic Engine Initial ServicingMuffler Used to reduce noise and emissions Season Inspection EngineBefore Starting Oil TypeSetup Place the engine fuel valve lever See to the on position Place the engine ON/OFF switch See in the on positionOperation Starting the EngineStopping the Engine Always run engine at full speed while pumpingPlace the fuel shut-off lever See in the OFF position Pump Vacuum Test Maintenance PumpAdjusting Impeller Clearance Pump CleaningPump Vacuum Tester First Every Maintenance EngineEngine Maintenance Engine Maintenance ScheduleEngine OIL Engine AIR CleanerDaily WeeklySpark Arrester Removal Spark Arrester CleaningPump Storage StorageOperation not satisfactory Troubleshooting EngineEngine Troubleshooting Symptom Possible Problem Solution Difficult to startTroubleshooting ENGINE/PUMP Pump TroubleshootingSymptom Possible Problem Solution Explanation of Code in Remarks Column Sample Parts ListQty Description Suggested Spare PartsPump Assembly 0641400430 14660001301466040700 0482200240Pump Assembly 0451250080 14662512410205450100 0401450100Engine Service Parts 17620Z4H020 17672ZE2W0117672Z4H020 17620ZH7023Freight Policy Terms and Conditions of Sale PartsQP4TH Trash Pump Operation and Parts Manual REV. #3 01/29/14 HERE’S HOW to GET Help
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