Multiquip qp402h 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.

 

 

 

 

 

 

 

 

 

 

 

QP402H CENTRIFUGAL PUMP • OPERATION AND PARTS MANUAL — REV. #2 (01/29/14) — PAGE 27

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Contents This Manual Must Accompany the Equipment AT ALL Times Model QP402HProposition 65 Warning Page QP402H 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 QP402H Specifications PumpSpecifications Pump Dry Net WeightSpecifications Engines Specifications EngineGeneral Information Drain Plug Remove this plug to drain water from the pump 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 PumpPump 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 9430100160 94301000109430100020 ReplacesEngine Service Parts 17210ZE2822 17620Z0T30517620Z4H020 28462ZE2W11Freight Policy Terms and Conditions of Sale PartsPage HERE’S HOW to GET Help

qp402h specifications

The Multiquip QP402H is a versatile and powerful portable generator designed to meet the demanding energy needs of various applications, making it an ideal choice for construction sites, events, and emergency power supply. This generator stands out due to its robust construction, reliability, and advanced technologies that contribute to its performance and efficiency.

One of the standout features of the QP402H is its Honda GX270 engine, known for its durability and fuel efficiency. This air-cooled, four-stroke engine provides a consistent power output, ensuring that users have access to the necessary electricity to run various tools and equipment without interruption. With a tank capacity that allows for extended run times, the generator can operate for several hours without frequent refueling, making it particularly suitable for long workdays or events.

The QP402H delivers an impressive power output of 4,000 watts, making it capable of handling multiple electrical devices simultaneously. This makes it a reliable choice for powering heavy-duty equipment, lighting systems, and other essential machinery. Furthermore, the generator is equipped with multiple 120V outlets, which enhance its versatility and allow users to distribute power efficiently across different tools.

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Safety features are another hallmark of the QP402H, including a low oil shutdown system that automatically turns off the engine when oil levels are too low. This prevents potential engine damage and reduces maintenance costs. Additionally, the generator is designed with sound reduction technologies, which minimizes noise output, enabling its use in noise-sensitive environments.

The generator’s construction features a heavy-duty frame that offers protection against rugged conditions, ensuring longevity and reliability in the field. Its user-friendly control panel promotes easy operation, allowing even inexperienced users to operate the generator without difficulty.

In summary, the Multiquip QP402H is an exceptional portable generator characterized by its powerful Honda engine, practical power output, and advanced safety features. Its portable design and robust construction make it an excellent choice for various applications, promising reliability and efficiency wherever power is needed.
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