Troubleshooting
8313889B
Pump output is low
(Base Coat Pump see pages
22.
Top Co at P ump see manual
310894)
Strainer (82) is clogged Clean strainer.
Piston ball is not seating Service piston ball.
Piston packings are worn or damaged Replace packings.
O-ring in pump is worn or damaged Replace o-ring.
Intake valve ball is not seating properly Clean intake valve.
Intake valve is packed with material Clean intake valve.
Engine speed is too low Increase throttle setting.
Clutch is worn or damaged Adjust or replace clutch. Page 17.
Pressure setting is too low Increase pressure.
Tip filter or tip is clogged or dirty Clean filter.
Large pressure drop in hose with heavy
materials
Use larger diameter hose and/or reduce overall
length of hose.
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 damaged Replace packings.
Displacement rod is worn or damaged Replace rod.
Fluid is spitting from gun Air in pump or hose Check and tighten all fluid connections. Reprime
pump.
Tip is partially clogged Clear tip.
Fluid supply is low or empty Refill fluid supply. Prime pump. Check fluid supply
often to prevent running pump dry.
Pump is difficult to prime Air in pump or inlet tube Check and tighten all fluid connections.
Reduce engine speed and cycle pump as slowly as
possible during priming.
Intake valve is leaking or contaminated 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.
Paint is too thick Thin the paint according to the supplier's recommen-
dations
Engine speed is too high Decrease throttle setting before priming pump.
Prime/Drain valve is plugged Material hardened in valve Operate drain valve at least once per hour when
spraying.
Flush valve more thoroughly when cleaning sprayer.
Aggregate packed up in valve Valve is opened too slowly and/or aggregate is too
large.
Over pressure relief valve
actuates
Clutch is worn out or damaged. Pres-
sure transducer or control board are
damaged.
Check and replace worn or damaged component.
Valve is damaged or worn. Clean out debris and replace valve.
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.
High engine speed at no load Misadjusted throttle setting Reset throttle to 3300 engine rpm at no load.
Worn engine governor Replace or service engine governor
No display, sprayer operates Display damaged or has bad connec-
tion
Check connections. Replace display.
Problem Cause Solution