QP-301TH — MAINTENANCE (PUMP)

Pump Vacuum Test

CAUTION :

DO NOT attempt to start the engine unless the pump has previously been primed with water.Severe pump damage will occur if pump has not been primed.

To perform the pump vacuum test do the following:

1.Remove the pump fill cap (Figure 2), and fill the pump with water.

2.Start the engine as outlined in the initial start-up section, and wait for the pump to begin pumping.

3.As shown in Figure 17 (next page), place a water hose inside the discharge opening of the pump, and turn on the water. This flow of water into the discharge opening will prevent the pump from running dry.

4.Place the Pump Vacuum Tester (P/N 7000030) over the pump suction (inlet) opening (Figure 17) with the vacuum gauge facing upwards. It may be necessary to apply a small amount of water around the rubber seal of the vacuum tester to make a good suction fit.

5.Check and make sure that there are no air leaks between the vacuum tester and the inlet port on the pump. If air leaks are present reseat vacuum tester.

6.Run the pump for a few minutes while monitoring the vacuum gauge. If the gauge indicates a reading between -25 and -20 in. Hg. (inches of mercury) then it can be assumed that the pump is working correctly.

25 in. Hg (inches of mercury)

NOTE translates into 25 feet of lift at sea level.

7.If the vacuum tester gauge indicates a reading below -20 in. Hg, it can then be assumed that the pump is not functioning correctly, and corrective action needs to be taken.

6.To test the flapper valve, shut down the engine. The vacuum tester should remain attached to the pump suction inlet port by vacuum. This indicates the pump's flapper valve is seating properly to hold water in the suction hose when the engine is stopped.This prevents backflow and allows for faster priming when the engine is restarted.

Adjusting Impeller Clearance

1.If it is necessary to replace impeller or volute, be sure clearance between impeller and volute is adjusted correctly.

2.The impeller should be as close to the volute as possible without rubbing against it. Clearance is adjusted by adding or removing shims from behind the impeller.

3.Check clearance between impeller and insert by slowly pulling starter rope to turn impeller. Remove spark plug to make it easier to turn impeller.

It is important not to remove too many shims or the clearance

NOTE between the impeller and volute will become too wide and pump performance will be reduced. Remember as the impeller wear

down, additional shims may be required to maintain the clearance between the impeller and insert.

4.Check the impeller every six months for wear, and for clearance between the impeller face and the volute. Also check the shaft seal for wear, as well as the shaft sleeve.

Pump Cleaning

After pumping water containing large amounts of dirt and debris, perform the following:

1.Remove the drain plug from the pump housing (Figure 2) and drain any water left in the pump.

2.Loosen the two locking hand knobs (turn counter- clockwise) and remove clean-out cover.

3.Clean and remove dirt, debris from pump casing. Inspect impeller and volute for wear. Replace any damaged or worn parts.

CAUTION :

The impeller may develop sharp edges. Use extreme care when cleaning around the impeller to prevent being cut.

PAGE 20 — QP-301TH TRASH PUMP — PARTS MANUAL — REV. #4 (10/05/05)

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Multiquip manual QP-301TH Maintenance Pump, Pump Vacuum Test

QP-301TH specifications

The Multiquip QP-301TH is a state-of-the-art portable generator designed to meet the diverse power needs of contractors, professionals, and outdoor enthusiasts. Known for its durability, performance, and reliability, this model is a popular choice in the generator market, especially among those requiring consistent and efficient power supply.

One of the main features of the QP-301TH is its robust engine. It is powered by a reliable Honda GX390 engine known for its fuel efficiency and low emissions. This engine offers a starting wattage of 3000 watts and a running wattage of 2400 watts, which is ideal for powering tools, small appliances, and equipment. The generator’s design allows for 120-volt output, providing versatility for various applications.

The QP-301TH also boasts a user-friendly control panel that simplifies the operation. It includes clearly labeled outlets, such as two 120V GFCI outlets and one 120V twist-lock outlet, ensuring easy connectivity to electrical devices. The generator is equipped with an electric start system, facilitating effortless ignition, which is particularly helpful in emergency situations or when the generator is needed quickly.

Portability and convenience are key characteristics of the QP-301TH. Weighing approximately 190 pounds, it features built-in wheels and a comfortable handle that make transport and maneuvering straightforward, making it a practical choice for job sites, camping, or tailgating.

Moreover, the generator incorporates several advanced technologies to enhance performance and safety. The low-noise operation, a hallmark of Multiquip generators, ensures a quieter working environment, while the automatic shut-off feature protects the engine from damage in case of low oil levels.

The protective frame provides durability and safeguards the generator against accidental impacts. It is also designed to withstand various weather conditions, making it suitable for outdoor use.

Overall, the Multiquip QP-301TH stands out due to its combination of power, efficiency, and portability. Its user-centric design and advanced safety features make it a desirable choice for those looking for a dependable generator to handle their energy needs. Whether for professional use or recreational activities, the QP-301TH is a reliable power solution.