Air Motor Repair - Graco T2 Instructions Manual

Air Motor Repair

1. Remove cap (1), cylinder (4), and square gaskets
(3*). Inspect all parts, including spring under cap
(not shown in F . 10) for damage and replace if
IG
necessary. See F . 10. Unscrew by hand or use a
IG
chain wrench to prevent distortion of the cylinder's
shape.
1
*3
4
*3
F . 10
IG
2. Loosen set screw (18) and unscrew air piston head
(5). If necessary to assist turning, wedge a screw-
driver blade between the screw heads (16) and the
hex cap (9). Inspect o-rings (13* and 15*) for dam-
age and replace if necessary. During reassembly,
do not add thread lock paste to the piston head.
Ensure o-ring (13*) is correctly positioned and not
pinched. See F . 11.
IG
*15
5
*13
18
F . 11
IG
311882C
ti9896
ti9897
3. Remove 3 screws (16) from top of air piston.
Remove valve disk (8) and spacers (11). Remove
washer (6*) from valve disk. Inspect all parts for
damage. During reassembly, ensure spacers (11)
do not pinch gaskets (10). See F
16
9
8
11
7
F . 12
IG
4. Place pin tool (69) in piston hole to prevent piston
from turning. Use second pin tool (69) to unscrew
piston cap (17) and separate from piston (21) to
expose dowel pin (19). See F
69
21
69
F . 13
IG
Air Motor Repair
. 12.
IG
*6
5
*10
14
ti9898
. 13.
IG
17
19
ti9899
11