Multiquip MQ600TD80 - Manual (Page 27)

mq600Td80 TRaSH pUmp• opeRaTion and paRTS manUal — Rev. #11 (10/10/11) — page 27
Maintenance
pUmp vaCUUm TeST
To perform the pump vacuum test do the following:
1. Remove the pump fill cap, 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.
Confirm engine is operating at 1,900 RPMs
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 over the pump inlet
opening (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
5. Check and make sure that there are no air leaks
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.
between the vacuum tester and the inlet port on the
pump. If air leaks are present re-seat vacuum tester.
6. Run the pump for a few minutes while monitoring the
vacuum gauge. A pump will lose approximately one
foot of suction lift for every 1,000 feet of elevation.
Depending on the elevation, the gauge should read
between 20-29 in. Hg. (inches of mercury). This is an
indication that the pump is working correctly.
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.
NOTICE
25 in. Hg (inches of mercury) translates into 25 feet of
lift at sea level.