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Service
Problem
Fluid leaking from
packing nut (4).
Fluid nozzle (2)
dripping.
Thin, coarse finish.
Thick, dimpled finish
(resembling orange
peel).
Service
Preparation
1. Flush and clean gun before servicing.
2. Follow Pressure Relief Procedure,
page 5.
Air Cap, Nozzle, and Needle
1. Unscrew air cap (1).
2. Trigger gun while you remove the
nozzle (2) with gun tool (27).
Trigger gun and use gun tool (27) when-
ever you tighten or remove the nozzle (2)
to avoid damage.
8
Cause
a. Packing nut (4) loose.
b. Packing (3-1, 3-2) worn or
dry.
a. Dry packing (3-1, 3-2).
b. Sluggish needle (10).
c. Packing nut (4) too tight.
d. Worn fluid nozzle or
needle.
a. Gun held too far from
surface.
b. Atomization air pressure
set too high.
Gun held too close to surface. Hold gun about 6 to 8 inches
a. Tighten, but not so tight as to grip
needle.
b. Lubricate or replace.
a. Lubricate.
b. Clean and lubricate.
c. Loosen.
d. Replace.
a. Hold gun about 6 to 8 inches
(150 to 200 mm) from surface.
b. Reduce air pressure.
(150 to 200 mm) from surface.
3. Remove fluid adjustment knob (8-2) and
spring (9).
4. Pull fluid needle (10) out the back of the
gun.
Air Valve and Needle Packings
1. Remove retaining rings (15), pin (16), and
trigger (17).
2. Remove packing nut (4) and fluid needle
packings (3-1, 3-2).
3. Remove fluid needle guide (7).
4. Remove fluid adjusting guide (8-1).
5. Remove spring (18) and air valve (19).
6. Remove air valve seat (20) and o-rings.
7. Replace parts as needed.
8. Assemble gun in reverse order. Lubricate
needle and o-rings. Be sure to trigger gun
when installing nozzle (2).
Solution
312388P
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