Graco Optimiser 2K 02748 Instructions Manual page 21

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.
Fig. 38
8. Tighten 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.
Fig. 39
Service
9. Remove the u-cup seal (32) from the fluid adjust-
10. Place the new u-cup seal (32) on the seal installa-
11. Push the u-cup seal (32) into the fluid adjustment
21
14
B
Apply even pressure to the u-cup seal (32) when
installing it to avoid damaging the seal.
12. Install the new packing ring (22).
02764
1
31
35
Fig. 40
02758
ment nut (6). See Fig. 40. Do not damage the seal
surface or the nut's internal threads.
tion tool (42) with the u-cup lips facing the tool.
See Fig. 40.
nut (6) until a definite snap is felt.
CAUTION
U-cup lips face
the tool
42
22
32 1
6
02021