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SERVICE
TROUBLESHOOTING
PROBLEM CAUSE SOLUTION
Low Pressure Worn nozzle.
Belt slippage.
Air leak
in
inlet plumbing.
plugged or improperly
Relief valve stuck, partially
adjusted; valve seat worn.
Tank outlet filter clogged.
Worn packing. Abrasives
in
tion. Inadequate
water
supply.
pumped fluid or
severe cavita-
t-"
the manifold.
Water leabge.from under
Water
in
pump crankcase.
Strong surging at the inlet
and
low
pressure on the
discharge side.
Electric motor stops while
I
spraying.
starting;
blows fuses.
Electric
motor labors when
I
Fouled or dirty inlet or discharge
valves.
1
Worn inlet or discharge valve.
Leaky discharge hose.
Restricted inlet or air entering
the inlet plumbing.
Inlet restrictions and/or
air
leaks. Stuck inlet or discharge
valve.
Leaking high pressure seals.
Worn packing
May be caused by humid air
crankcase.
condensing into water inside the
Scored plungers.
Over pressure to inlet manifold.
Damaged or worn plungers.
Abrasive material
in
the fluid
being pumped.
temperature of fluid being
Excessive pressure and/or
pumped.
Over pressure of pumps.
Running pump dry.
Foreign particles in the inlet or
discharge valve, or worn inlet
and/or discharge valves.
Building circuit fuse blown.
Overload switch has opened.
Building circuit fuse blown.
Overload switch has opened.
Tip plugged.
Not wired properly,
Replace
with
nozzle of proper size.
Xghten or replace;
use
correct belts and replan
all three at
the
same time.
Disassemble, reseal, and reassemble.
and dirty valve seats. Kit available.
Clean, and adjust relief valve; check
for
worn
Clean. Check more frequently.
Install proper filter. Check flow available to
pump.
Clean inlet and discharge valve assemblies
Replace worn valves, valve seats and/or
discharge hose.
seal.
Proper size inlet plumbing; check for
air
tight
Clean out foreign material, replace worn valves.
Replace seals
Install
new
packing
Crankcase Oil (other approved oil every month or
Change oil at 3rnonth or500Hour intervalsusing
200
hours1 P/N 801-144.
Replace plungers.
Reduce inlet pressure.
Replace plungers.
Install proper filtration on pump inlet plumbing.
Check pressures and fluid inlet temperature; be
overheat if run for over
10
minutes without
sure
they are within specified range. Pump
will
spraying.
Check tip size.
Use
only proper tip.
Do
not
run
Dum0
without water.
Check for smooth lap surfaces on inlet and .
discharge valve seats. Discharge valve seats and
inlet valve.seats may be lapped on
a
veryfine
011
stone.
Check, replace or reset.
Shut
unit
off,
hold gun open, restart.
:heck, replace or reset.
Shut unit
off,
relieve
.,
pressure-allow
:o
cool.
qemove and clean.
3eplace capacitor.
See
wiring diagram.
12
801-765