MQ-D206H — 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 19 (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 19) 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.

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.

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

Gear Reduction Oil (Transmission)

1.Change transmission oil after the first 40 hours of operation. Use SAE 80/90 EP gear oil. Transmission oil capacity is 1-1/4 pints (590 ml.). Check oil level periodically and change oil after every 400 hours of operation.

Connecting Rod Bearing Lubrication

1.Grease connecting rod bearing thru the access hole (Figure 7) every 25 hours of operation.

2.Use only premium lithium based grease, conforming to NLG1 Grade #2 consistency.

Connecting Rod Bearing Lubrication

1.Keep interior of pump and valves clean. Flush out pump with clear water after operation.

2.Remove connecting rod guard occasionally and wipe up excess grease from connecting rod bearing.

MQ-D206H DIAPHRAGM PUMP — PARTS MANUAL— REV. #0 (12/15/03) — PAGE 21

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Multiquip MQ- D206H manual Gear Reduction Oil Transmission, Connecting Rod Bearing Lubrication
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MQ- D206H specifications

The Multiquip MQ-D206H is a cutting-edge, high-performance diesel engine generator designed to provide reliable power for a variety of applications, including construction sites, outdoor events, and emergency power needs. This generator stands out in the market due to its robust design, advanced features, and high efficiency, making it a preferred choice among professionals in various industries.

One of the key features of the MQ-D206H is its powerful and durable 206cc diesel engine. This engine is engineered to deliver consistent power output while maintaining excellent fuel efficiency, allowing users to operate the generator for extended periods without the need for frequent refueling. The MQ-D206H is capable of producing up to 6,000 watts of continuous power, making it suitable for running multiple tools and equipment simultaneously.

The generator is equipped with a large fuel tank that offers extended runtime, ensuring that users can rely on it during long working hours without interruptions. Its compact and portable design, complemented by durable wheels and a sturdy frame, allows for easy transportation and setup in various locations. This portability makes it an ideal choice for both stationary use and on-the-go power requirements.

In terms of technology, the Multiquip MQ-D206H features advanced noise reduction technologies, making it one of the quieter generators in its class. The built-in sound attenuated enclosure significantly reduces operational noise, helping to maintain a quieter environment in residential areas or during outdoor events.

Moreover, the MQ-D206H includes innovative safety features such as low oil shutoff and over-current protection, which help safeguard the engine and connected equipment from damage. The user-friendly control panel offers easy access to essential functions, including voltage selection and circuit breakers, allowing for a straightforward operation.

Construction professionals and event organizers will appreciate the high-quality electrical components within the MQ-D206H, which are designed to deliver clean and stable power, ensuring that sensitive electronic devices are protected from voltage surges.

In summary, the Multiquip MQ-D206H is a reliable and versatile diesel generator that excels in performance, fuel efficiency, and portability. With its advanced features and rugged design, it caters to a wide range of power needs, making it an indispensable tool for both professional and recreational users.
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