Needle Replacement
313347C
5
Needle Replacement
Removal
1.
Relieve pressure, page 2. Set trigger lock (11a).
2.
Disconnect air hose from gun.
3.
Disconnect bracket (36) from retainer (16) and swivel
bracket out of the way
4.
Remove tip (28) and guard (29), Parts, page 7, from
air cap manifold (26).
5.
Release trigger lock (11a). Squeeze trigger (11).
Remove set screw (39) at base of air cap manifold
(26). Unscrew air cap manifold from front of gun (26).
6.
Squeeze trigger. Remove diffuser housing (3).
7.
Remove locknut (10) and end cap (9).
8.
Tap needle assembly (8), Parts, page 7, out, with
needle exiting through front of gun.
9.
Use a soft brush to clean out internal passages of
gun.
Installation
1.
Apply non-silicon grease to o-rings of new needle.
2.
Guide new needle (8), Parts, page 7, through front of
gun.
3.
Loosely install end cap (9) and locknut (10).
4.
Grease threads of needle housing (3).
5.
Squeeze trigger (11) and install diffuser (5). Torque
to 26-32 ft-lb (36-40 N•m).
6.
Hold gun with nozzle facing up.
7.
Turn locknut (10) clockwise until you see and feel
trigger (11) raise slightly.
8.
Turn locknut (10) 3/4 turn counter-clockwise.
NOTE: Needle is properly adjusted when trigger moves
freely.
9.
Screw air cap manifold
(26) on until end of
manifold is flush with end
of diffuser housing (5).
26
15
11a
9
10
5
1
11
3
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8
NOTICE
The end of the diffuser housing must be flush or
sticking out beyond the manifold in order to ensure a
proper seal.
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