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308-34121
Service
6. Slide
the new air valve (14) onto the fluid needle
(21) until it is against the nut (B). See Fig. 38.
7.
Install the fluid needle (21) and air valve (14) into
the back of the gun.
02764
Fig. 38
21
14
B
8. T
ighten the packing adjustment nut (31) with the
gun wrench (35) until you can feel a slight drag on
the fluid needle. See Fig. 39. Do not over-tighten
the screw as this may bind the needle movement.
02758
Fig. 39
31
35
9.
Remove the u-cup seal (32) from the fluid adjust
-
ment nut (6). See Fig. 40. Do not damage the seal
surface or the nut’
s internal threads.
10.
Place the new u-cup seal (32) on the seal installa
-
tion tool (42) with the u-cup lips facing the tool.
See Fig. 40.
11.
Push the u-cup seal (32) into the fluid adjustment
nut (6) until a definite snap is felt.
CAUTION
Apply even pressure to the u-cup seal (32) when
installing it to avoid damaging the seal.
12.
Install the new packing ring (22).
Fig. 40
32
42
1
1
U-cup
lips
face
the
tool
02021
6
22