Maintenance - MULTIQUIP QP2E Operation And Parts Manual

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 fi ll cap (Figure 2), and fi ll 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 11, place a water hose inside
the discharge opening of the pump, and turn on the
water. This fl ow 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 11) 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 fi t.
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 reset 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.
PAGE 18 — QP2E CENTRIFUGAL PUMP • OPERATION AND PARTS MANUAL — REV. #0 (02/12/09)
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 fl apper valve, shut down the engine. The
vacuum tester should remain attached to the pump
suction inlet port by vacuum. This indicates the pump's
fl apper valve is seating properly to hold water in the
suction hose when the engine is stopped. This prevents
backfl ow and allows for faster priming when the engine
is restarted.

MAINTENANCE