Graco PerformAA 26B570 Instructions Manual page 23

11. Remove the large o-ring (22) from the piston and
the smaller o-ring (23) from the piston shaft.
Remove the two o-rings (25, 26) from each of the
piston stems. Check that the stems are solidly in
place. If they are loose, replace the entire piston
assembly (20).
12. Perform the following applicable step:
a. Guns in a non-circulating system: Remove the
fluid outlet port plug (5) and gasket (4) from the
fluid housing (2). Remove the o-ring (6) and
backup o-ring (7) from the plug.
8
10a
9a
10e
4
30
9
10d
* included with the 288171 Air Seal Repair Kit
† included with the 288136 Fluid Repair Kit
F . 17: Model 26B572 cutaway view
IG
3A8553A
1
26* 3
2
2
15*
2
5
10
2
10f
4†
b. Guns in a circulating system: Remove the
gasket (4) from the fluid housing (2).
13. Clean all parts and replace any worn parts. When
assembling, lubricate the threads with anti-seize
lubricant.
22*
2
3
25*
16*
14
2
NOTES:
2 Lubricate threads with anti-seize lubricant
2
3
Lubricate with light-weight oil
4
Do not lubricate
5
Torque to 155-165 in-lb (18-19 N•m)
6
Apply semi-permanent anaerobic sealant
7
Torque to 4-5 in-lb (0.45-0.56 N•m)
8
Tighten cap (27) until it bottoms out
27
8
21
19
6
7
20
23*
3
TI8123a
Service
29
28
SERVICE
23