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TROUBLE SHOOTING
PROBLEM CAUSE ACTION REQUIRED
Spray Gun HUMS Piston Sticking. Remove 4 screws adjacent to paint pick up pipe
but does not Part no. SG12. part no. SG14. Release container cover, cylinder
operate. housing and piston assembly. Unscrew and remove
nozzle. Remove atomiser valve. Use soft punch or
shaft of 4.5mm MAXIMUM diameter inserted into the
valve housing to eject the stuck piston. Clean and
lubricate piston and cylinder. Re-assemble carefully
in reverse order. Remember to replace the
compression spring onto the piston before fitting the
piston. Ensure you have not dropped any parts into
the motor housing.
No suction Feed. No Valve in pump. Insert atomiser valve part no. SG03.
Paint Pickup Clean filter accordingly part no. SG16.
filter blocked.
Liquid too thick. Thin liquid as recommended.
Spray Gun motor Nozzle Blocked Clean thoroughly with thinners.
operates but part no. SG04 or
nothing coming SG44.
out. Atomiser valve Clean thoroughly with thinners.
blocked, part no.
SG03.
Spray Gun motor Worn valve. Replace atomiser valve part no. SG03.
operates, but Worn nozzle. Replace nozzle part no. SG04 or SG44.
spluttering. Container almost Refill container.
empty.
Spray gun held Hold at correct angle.
at wrong angle.
Liquid too thick. Thin liquid as recommended.
Incorrectly set Adjust regulator at back of gun.
regulation
control.
Paint Dripping. Nozzle loose. Tighten nozzle.
Operating at more Keep sprayer upright.
than 45
o
angle.
Excessive fogging. Pressure too high. Turn output knob clockwise to reduce pressure
Holding sprayer Hold sprayer about 30cm (12”) from work.
too far from
surface.
Runs and sags in Arm movement See section on spraying.
paint. too slow.
Spray gun too
close to work
surface.
Applying too
much paint in
one go.
sg82 amend p8.qxd 19/01/00 12:35 Page 12