Troubleshooting
30 3A6400A
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 (see pump manual).
Displacement rod is worn or damaged. Replace rod (see pump manual).
Fluid is spitting from gun Air in pump or hose. Check and tighten all fluid connections.
Reprime pump (see operation manual).
Tip is partially clogged. Clear tip (see gun manual).
Fluid supply is low or empty. Refill fluid supply. Prime pump (see operation
manual). Check fluid supply often to prevent
running pump dry.
Pump is difficult to prime Air in pump or hose. Check and tighten intake tube connections.
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 (see pump manual).
Engine speed is too high. Decrease throttle setting before priming pump
(see operation manual).
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.
Gallon counter not working Bad sensor, broken or disconnected
wire. Displaced or missing magnet.
Check connections. Replace sensor or wire.
Reposition or replace magnet.
No display, sprayer operates Display damaged or has bad
connection.
Check connections. Replace display.
Problem Cause Solution
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