Multiquip MQD3H Bedienungsanleitung PDF herunterladen (Seite 20)

PAGE 20 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13)

To perform the pump vacuum test do the following:

1. Start the engine as outlined in the initial start-up section,

and wait for the pump to begin pumping.

2 Check and make sure that there are no air leaks between

the vacuum tester (Figure 21) and the inlet port on the

pump. If air leaks are present reseat vacuum tester.

3. 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.

Pump Vacuum Test

22 in. Hg (inches of mercury)

translates into 25 feet of lift at

sea

level

4. 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.

5. 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.

Gear Reduction Oil (Transmission)

1. Check gearbox oil level every

20 hours

of operation or

at least once a week; more often if any leakage is

detected around the gearbox.

2. Change transmission oil after the first

40 hours

operation. Use SAE 80/90

EP (API GL-5) gear oil.

Transmission oil capacity is 22 ounces (651 ml.). Check

oil level periodically and change oil after every

350 hours

of operation.

Connecting Rod Bearing Lubrication

1. Grease connecting rod bearing (Figure 8) every

8 hours of operation.This is done by rotating the

rod bearing to the 12 o'clock position. At this point

the grease fitting will be visible through the guard

hole.

2. Use only

premium lithium based grease

, conforming

to NLG1 Grade #2 consistency.

3. Remove connecting rod guard occasionally and

wipe up excess grease from connecting rod

bearing.

NOTE

Flapper Valve Replacement

1. Remove the two bolts that secure the suction port

chamber (Figure 20) to the pump well. Remove suction

port chamber. Replace valves as required and

reassemble.

Figure 20. Flapper Valve Replacement

2. Remove the two bolts that secure the discharge port

(Figure 20) to the pump well. Remove discharge port

plate.Replace valves as required and reassemble.

MAINTENANCE

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