Aussie Pumps QP Manual de instalación, uso y mantenimiento - Página 4
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Impeller
a. Dismantle the drain cover and volute casing as described above 1.
b. The impeller is now exposed
c. Impeller is attached to the engine shaft with a screw.
d. Tap the impeller at the lead part in counter-clockwise direction with a mallet
e. Screw new impeller on shaft by hand, and tighten by using a mallet, tapping
at the lead part of the impeller in a clockwise direction.
Check Valve
a. Unscrew suction cover set nut or cap-screw, and remove suction cover.
b. Unscrew check valve set bot or screw with washer at the back of the suction
cover.
Mechanical Seal
c. Dismantle the impeller as above.
d. D. Remove the mechanical seal sleeve from the shaft.
e. Mechanical seal rotary section and spring will be removed with the sleeve.
f. Remove mechanical seal stationary section from the seat of casing cover.
g. Set the new mechanical seal sleeve to the shaft after assembled with new
rotary section spring. (Check to see if the mechanical seal O-ring is placed
correctly to the seat)
h. Set new mechanical seal rotary section and spring with the sleeve to fit the
slit of the sleeve with spring stopper.
i. Screw the impeller as described above.
Troubleshooting
PROBLEM
Pump does not turn over
Pumping volume is lower
than normal
Pump does not self prime
CAUSE
Impeller jamming
Air leak on suction side
Reduction of engine
performance/rpm
Damaged mechanical seal
Excessive suction lift
Leaking water
Clogging of foreign
substance in impeller
Wear of impeller
Suction of air on suction side
Insufficient priming water
inside pump casing
Loose drain plugs
Engine loses performance
Sucking air from mechanical
seal
Page
4
Australian Pump Industries
REMEDY
Adjust impeller spacing,
disassemble and clean
Check fitting and piping on
suction side. Replace if
necessary.
Take to engine repair Agent
Relace mechanical seal
Move pump closer to liquid
Take to Aussie Pump
repairer
Disassemble and clean
Replace impeller
Check hoe and fitting at
suction side
Prime fully
Tighten the 2 plugs
completely
Take to engine repairer
Replace mechanical seal
document number: QPWP151204