Graco Optimiser 02017 Instructions Manual page 22

Assembly
1. Insert the fluid needle (21) through the front of the
gun as shown in Fig. 6. Install the new packing
assembly (39) by placing them on the end of the
needle tip. Orientate the packings as shown in
Fig. 6.
Fig. 6
2. Place the packing adjustment screw (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
screw (31) as shown in Fig. 7. Be careful not to
nick or damage parts with the tool. Turn the screw
with the screw driver (about 3 turns); the packing
will still be loose.
Fig. 7
22 308–293
Service
1
2
39
3
1
Washer
U-cup; lips face
2
21
down
3 Spreader
A
31
02110
4. Place the new u-cup seal (33) on the seal installa-
tion tool (42) with the u-cup lips facing the tool as
shown in Fig. 8.
5. Push the packing (33) into the gun until a definite
snap is felt.
1
U-cup lips face the tool
Fig. 8
6. Place the new air valve assembly (14) on the fluid
needle (21), against the nut (B). See Fig. 9. This
helps align the entrance of the air valve stem into
the inside diameter of the u-cup seal (33) without
damaging the seal lip.
7. Install the fluid needle (21) and the air valve
assembly (14) into the back of the gun.
Fig. 9
33
1
42
02023
21
14
B
02108