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.

ADJUSTING IMPELLER CLEARANCE

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

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.

NOTICE

It is important not to remove too many shims or the clearance 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 3) and drain any water left in the pump.

2.Loosen the two locking hand knobs (tur n counterclockwise) 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 — QP2TH TRASH PUMP • OPERATION AND PARTS MANUAL — REV. #5 (01/29/14)

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Multiquip QP2TH manual Maintenance Pump, Pump Vacuum Test, Adjusting Impeller Clearance, Pump Cleaning
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QP2TH specifications

The Multiquip QP2TH is a versatile and efficient piece of equipment tailored for various applications, including construction, landscaping, and roadwork. This powerful equipment is designed to provide robust performance, easy maneuverability, and a range of features that make it a valuable addition to any job site.

One of the standout features of the QP2TH is its robust construction, which includes a heavy-duty frame designed to withstand the rigors of demanding work environments. The equipment is built with high-quality materials, ensuring longevity and reliability. The QP2TH is equipped with a reliable engine, offering sufficient power to tackle tough tasks while maintaining efficiency. This engine not only provides excellent performance but also ensures lower fuel consumption, making it an economic choice for operators.

The QP2TH boasts advanced technology that enhances its usability, including automated features that simplify operation. Its intuitive control panel allows operators to easily select settings, monitor performance, and troubleshoot issues with minimal downtime. Additionally, the machine features ergonomic controls designed to reduce operator fatigue, enabling longer working hours without compromising comfort.

Maneuverability is another defining characteristic of the Multiquip QP2TH. The compact design coupled with robust wheels allows for easy navigation across various terrains, including rugged landscapes and tight urban spaces. This versatility ensures that the QP2TH can perform effectively in a range of job applications, from grading and trenching to compacting and leveling.

Another noteworthy feature is the machine's ability to accommodate a variety of attachments and accessories. This adaptability makes the QP2TH suitable for multiple tasks, enhancing its effectiveness as a multifunctional tool on the job site. Whether operators need to switch from a compactor to a grader, the QP2TH can meet those needs swiftly and efficiently.

In conclusion, the Multiquip QP2TH is a powerful and adaptable machine equipped with significant features and technologies that enhance its performance and usability. With its durable construction, efficient engine, ergonomic controls, and versatility in attachments, the QP2TH stands out as an essential asset for professionals in the construction and landscaping industries.
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