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 (See Figure 3), 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 18, 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 (See Figure 18) 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.

NOTICE

25 in. Hg (inches of mercury) 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.

8.To test the flapper valve, shutdown 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.

PAGE 20 — QP402H CENTRIFUGAL PUMP • OPERATION AND PARTS MANUAL — REV. #2 (01/29/14)

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Multiquip qp402h manual Maintenance Pump, Pump Vacuum Test
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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.

In terms of portability, the Multiquip QP402H does not disappoint. It comes with sturdy wheels and a foldable handle, making it easy to transport from one location to another. This is especially beneficial for contractors and event planners who frequently move equipment to different job sites.

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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