TROUBLESHOOTING

TABLE 9. PUMP TROUBLESHOOTING (Continued)

SYMPTOM

POSSIBLE PROBLEM

SOLUTION

 

 

 

 

Incorrect engine speed speed?

Increase engine speed.

 

 

 

 

Piping is clogged or damaged?

Clean or replace piping.

 

 

 

 

Clogged pump?

Clean pump well.

 

 

 

Flow rate is slow.

Discharge line restricted or undersize?

Flush out piping or replace.

 

 

 

 

Collapsible disc hose?

Replace with rgid or noncollapsible hose.

 

 

 

 

Too many hose bends?

Straighten hose.

 

 

 

 

Hose lines too long?

Shorten hose lines.

 

 

 

 

Faulty suction piping?

Replace piping.

 

 

 

 

Pump located too far from fluid source?

Move pump closer to source.

 

 

 

Pump runs but no fluid.

Gate valve closed?

Open gate valve.

 

 

 

 

Clogged strainer?

Clean or replace strainer.

 

 

 

 

Discharge height too high?

Lower the height.

 

 

 

 

Leak in suction line?

Repair suction line.

 

 

 

Pump starts and stops

Leak in foot valve?

Repair or replace valve.

 

 

pumping.

Diaphragm has a crack or hole?

Replace diaphragm.

 

 

 

 

 

Defective or clogged flapper valves?

Clean or replace flapper valves.

 

 

 

Excessive noise while pump is

Pump not secured properly?

Secure pump.

 

 

in operation.

restricted suction line?

Clean or correct restriction.

 

 

 

 

Water can be seen on top of

Diaphragm has crack or hole?

Replace diaphragm.

 

 

diaphragm.

Screw loose holding diaphragm?

Tighten screw.

 

 

 

 

Pump stalls repeatedly or stops

Discharge height is over 25 feet (7.62 meters) of head?

Lower height.

for no apparent reason.

Material jammed in pump well?

Clean out pump well.

 

 

 

 

MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 29

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Multiquip MQD2H manual Pump Troubleshooting
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MQD2H specifications

The Multiquip MQD2H is a versatile and robust diesel-powered generator designed to cater to a wide range of applications, making it a staple for construction sites, emergency backup, and outdoor events. Engineered with advanced technologies, this generator is built to deliver reliable power and withstand challenging environments.

At the heart of the MQD2H is a powerful, fuel-efficient diesel engine that ensures long operational hours with minimal downtime. This efficiency is crucial for projects requiring continuous power supply. Equipped with a large fuel tank, the MQD2H can operate for extended periods without the need for frequent refueling, enhancing productivity on the job site.

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Safety is also a priority with the Multiquip MQD2H. The generator incorporates automatic shutdown features for low oil pressure and high engine temperature, protecting the unit from potential damage. This built-in safety mechanism provides peace of mind for operators, knowing that the generator is safeguarded against operational hazards.

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In conclusion, the Multiquip MQD2H is a reliable, durable, and efficient generator ideal for a multitude of applications. With its powerful diesel engine, user-friendly controls, enhanced safety features, and commitment to environmental sustainability, it stands out as a top choice for professionals seeking dependable power solutions in demanding conditions.
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