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SERVICE
Troubleshooting
PROBLEM
Low.Pressure
rump runs extremely
rough, pressure low.
iNater leakage from under
:he manifold.
iNater
in
pump crankcase.
Zrequent or premature
'ailure of the packing.
jtrong surging at the inlet
Ind low pressure on the
lischarge side.
hit
will not start.
:hemica1 injection system
oesn't work.
r leaks.
pray gun doesn't work
CAUSE
Worn nozzle.
Coupling slippage.
Air leak
in
inlet plumbing.
Relief valve stuck, partially
adjusted; valve seat worn.
plugged or improperly
Inlet suction strainer clogged
or improper size.
:
Worn packing. Abrasives
in
tion. Inadequate water supply.
pumped fluid or severe cavita:
charge valves.
Fouled or dirty inlet or dis-
Worn inlet or discharge valves.
Leaky discharge hose.
Pressure adjustment set down.
entering the inlet plumbing.
Restricted inlet or air
leaks. Stuck inlet or discharge
Inlet restrictions and/or air
valve.
Leaking high pressure seals.
Worn packing.
May be caused by humid
air
condensing into water inside
the crankcase.
Scored plungers.
Over pressure to inlet manifold.
Damaged or worn plungers.
4brasive material
in
the fluid
3eing pumped.
I
Excessive pressure and/or
:emperatwe of fluid being
Jumped.
3ver pressure
of
pump.
SOLUTION
Replace with nozzle of proper size.
Tighten or replace.
Disassemble, reseal, and reassemble.
Clean, and adjust relief valve; check for
worn and dirty valve seats.
Kit
available.
Clean. Use adequate size. 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.
rurn adjustment knob counter-
:lockwise to increase pressure.
'roper size inlet plumbing: check for air
:ight seal.
:lean out foreign material, replace worn
Ialves.
7eplace seals.
nstall new packing.
:hange oil
at
3
month or
500
hour intervals
)sing Crankcase Oil (other approved oil every
nonth or
200
hours)
P.N.
801-144.
leplace plungers
leduce inlet pressure.
leplace plungers.
nstall proper filtration
on
pump inlet
Ilumbing.
:heck pressures and fluid inlet temperature;
le sure they are within specified range.
leduce pressure.
7unning pump dry.
Do
not run pump without water.
:oreign particles
in
the inlet or
Check for smooth lap surfaces on inlet and
lischarge valve,
or
worn inlet
discharge valve seats. Discharge valve seats
and/or discharge valves.
and inlet valve seats may be lapped
on
a very
Jnit
not plugged
in.
Check power cord.
j.F.1.C. activated.
Check for proper grounding.
ilectric motor overheated.
Let motor cool
and
push reset button
ilectric service
off.
Check fuse/circuit breaker panel.
:hemica1 injector clogged. Disassemble chemical valve and clean.
\djustable nozzle completely
Turn control ring
on
nozzle clockwise
losed. to cause drop
in
pressure.
.ow chemical level.
Check level of chemical.
iun
cartridge needs replace- Replace cartridge (see gun parts drawing).
fine oil stone.,
Push switch
ON
(RESET)
button.
on
rear
of
motor.
,
Check and clean chemical hose and filter.
6
801-888