Filter
Top Products
PROBLEM
Frequent or premature failur
of the packing.
Strong surging
at
the inlet
discharge side.
and low pressure on the
CAUSE
Scored plungers.
Over pressure to inlet manifold.
Damaged or worn plungers.
Abrasive material in the fluid be
ing pumped.
Excessive pressure and/or
temperature of fluid being
pumped.
Over pressure of pumps.
Running pump dry.
Foreign particles in the inlet or
discharge valve, or worn inlet
and/or discharge valves.
NOTE:
A
M11 and M30 metric wrenches are re-
quired for servicing pump.
PUMP
Valves
Photo
1
and
2.
1) Remove the hex duo usino an M30’wrench
2)
Examine O-ring uide; plug &d replace
if
evidence of
3)
Remove valve assembly including retainer, spring,
cuts or distortion.
valve and valve seat from valve cavity.
NOTE:
Valve assembly may come apart during
removal.
4)
Replace valve parts with service kit (80-041)
in-
cluding retainer, spring, valve, valve seat, O-ring and
5)
Replace valve cover and torque to
75
ft-lb (100 N.m).
back-up-ring.
Photo
3.
Pumping Section
2)
Separate the manifold from the crankcase.
1)
Remove the four
(4)
hex nuts from the manifold.
NOTE:
It
may be necessary to tap manifold lightly
with mallet to loosen.
CAUTION:
plungers when removing to avoid damage to
either plungers or seals.
3) Carefully examine each plunger for any scoring and
replace if necessary.
SOLUTION
Replace plungers.
Reduce inlet pressure
Replace plungers.
Install proper filtration on pump inlet plumbing.
:heck pressures and fluid inlet temperature; be
jure they are within specified range.
3educe pressure.
lo
not run pump without water.
:heck for smooth lap surfaces on inlet 2nd
hharge valve
seats.
Discharge valve seats and
stone.
nlet valve seats may be lapped on
a
very fine oil