6 309662
Troubleshooting (Contd)
PROBLEM CAUSE SOLUTION
Loss of air control or volume
at gun
Air passages clogged with material After releasing gun trigger, make sure
system is fully depressurized before trig-
gering gun again. This helps prevent
material backing into gun passages.
Displacement pump output
p
Piston ball (220) not seating Clean piston area. See page 8.
ow on upstro
e
Piston packings worn or damaged Replace packings. See page 8.
Siphon hose coupling gasket (1e)
worn or missing.
Replace or install gasket
Pump cylinder o-ring (205) worn or
missing
Replace o-ring
Displacement pump output
low on downstroke or both
Siphon hose strainer is clogged Clean strainer
ow on
owns
ro
e or
o
strokes
Piston packings worn or damaged Replace packings. See page 8.
Intake valve ball (216) not seating
properly
Clean and service intake valve. See
page 8.
Clutch (9) worn or damaged Replace clutch. See page 14.
Material leaks into wet-cup Loose wet-cup (202) Tighten wet-cup enough to stop leakage
Throat packings worn or damaged Replace packings. See page 8.
Displacement rod (201) worn or
damaged
Replace displacement rod. See page 8.
Low fluid delivery Siphon hose strainer is clogged. Clean or remove strainer
Engine RPM too low Increase engine speed. See Startup,
procedure in operator manual.
No fluid delivery Flow control not set to PRIME Set flow control to PRIME
Compressor is not on and/or air
hoses are not properly connected
Check and correct
Gun is not fully triggered Squeeze trigger firmly and completely.
Spitting from gun Material supply is low or empty Refill and prime pump. See Startup pro-
cedure in operator manual. Check materi-
al supply often to prevent running pump
dry.
Heavy or poorly atomized
material when gun is first trig-
gered
Fluid pressure was not allowed to
fully self relieve after releasing gun
trigger
Wait a little longer between releasing gun
trigger and pulling it again
Gun was not fully triggered immedi-
ately when squeezed, causing gun
air passages to clog with material.
Always squeeze trigger fully to prevent
just air from turning on, which starts pump
and pressurizes hoses. Disassemble and
clean gun.
Material from gun is not atom-
ized, or has insufficient
Gun air control valve is turned fully in Turn air control valve out for desired
atomization.
atom
zat
on
Insufficient compressor air Increase air supply or compressor size
Gun nozzle too small for application Increase nozzle size