Troubleshooting
308870G 9
Excessive paint leakage into throat
packing nut
Throat packing nut is loose Remove throat packing nut spacer.
Tighten throat packing nut just
enough to stop leakage.
Throat packings are worn or dam-
aged
Replace packings. Manual 308798.
Displacement rod is worn or dam-
aged
Replace rod. Manual 308798.
Fluid is spitting from gun Air in pump or hose Check and tighten all fluid connec-
tions. Reprime pump. Manual
308867.
Tip is partially clogged Clear tip. Manual 309091.
Fluid supply is low or empty Refill fluid supply. Prime pump.
Manual 308867. Check fluid supply
often to prevent running pump dry.
Pump is difficult to prime Air in pump or hose Check and tighten all fluid connec-
tions.
Reduce engine speed and cycle
pump as slowly as possible during
priming.
Intake valve is leaking Clean intake valve. Be sure ball
seat is not nicked or worn and that
ball seats well. Reassemble valve.
Pump packings are worn Replace pump packings. Manual
308798.
Paint is too thick Thin the paint according to the sup-
plier's recommendations.
Engine speed is too high Decrease throttle setting before
priming pump. Manual 308867.
Clutch squeaks each time clutch
engages
Clutch surfaces are not matched to
each other when new and may
cause noise
Clutch surfaces need to wear into
each other. Noise will dissipate after
a day of run time.
Engine stalls Engine speed is to slow - Increase throttle setting.
- Adjust engine speed at no load to
3750 - 3850 rpm
Fluid filter is clogged Relieve pressure and clean filter
Too much pump friction (new pump) Reduce pressure to 3000 psi (20.68
MPa, 206.8 bar) until pump wears in
Spark plug wire is loose Reconnect wire
Problem Cause Solution
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