12
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
