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20308-341
Service
Assemble
NOTE:
See Fig. 34, page 19, for the parts that need to
be lubricated.
1.
Insert the fluid needle (21) through the front of the
gun as shown in Fig. 35. Install the new packing
assembly (39) by placing them on the end of the
needle tip. Orientate the packings as shown in Fig.
35.
02763
Fig. 35
21
39
1
Washer
U-cup;
lips face
down
Spreader
2
3
1
2
3
2. Place
the packing adjustment nut (31) over the
packing assembly and start the threads into the
gun, then remove the needle.
3.
Insert a thin-blade screw driver (A) through the
back of the gun and into the packing adjustment
nut (31). See Fig. 36. Do not nick or damage parts
with the tool. T
urn the screw with the screw driver
(about 3 turns); the packing will still be loose.
02762
31
A
Fig. 36
4.
Place the new u-cup seal (33) on the seal installa
-
tion tool (42) with the u-cup lips facing the tool.
See Fig. 37.
5.
Push the u-cup seal (33) into the gun until a defi
-
nite snap is felt.
CAUTION
Apply even pressure to the u-cup seal (33) when
installing it to avoid damaging the seal.
Fig. 37
33
02023
42
1
1
U-cup
lips face the tool