Graco 24V672, Repair Parts

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Air Motor Repair
16 333397A
Reassemble the Air Motor
NOTE: For easier reassembly, start with the top cover
(210) turned over on the workbench and assemble the
air motor upside-down.
1. See F
IG
. 13, page 20. Lubricate and install the o-rig
(202) on the top cover (210).
2. Lubricate the inside of the cylinder (205). Lower the
cylinder onto the top cover (210).
3. Lubricate and install the o-ring (204) around the pis-
ton (219).
4. Slide the piston assembly (219) down into the cylin-
der (205). Be sure the o-ring (202) stays in place.
5. Install the shield (206) around the cylinder (205) and
in the groove on the top cover (210).
6. See F
IG
. 9. Lubricate and install the new u-cup seal
with flange (207) in the bottom of the bearing in the
bottom cover (201). The u-cup must face up and the
flange must face down. Lubricate and install the
new u-cup seal (207) in the top of the bearing. The
lips must face up.
7. Lubricate and install the o-ring (202) on the bottom
cover (201).
8. See F
IG
. 10. Carefully place the bottom cover (201)
on the cylinder (205). Slide the rod through the
bearing. The manifold surfaces of the top and bot-
tom covers must align. Be sure the shield (206) is in
the groove on both the top and bottom covers.
9. Install the tie bolts (211) and tighten by hand.
10. Install two gaskets (208) on the manifold (220).
Install the manifold (214). Torque bolts to 95-105
in-lb (10.7-11.9 N•m).
NOTE: The manifold is reversible for ease of place-
ment of the muffler or the remote exhaust.
11. Align the air valve gasket (208*
◆
) on the manifold,
then attach the air valve.
12. Tighten the tie bolts (211) halfway. Work in a criss-
cross pattern. Check that the shield remains in the
grooves on both covers. Tighten the bolts in pattern
to 11-13 ft-lb (15-18 N•m).
13. Lubricate and install pilot valves (213) in the top and
bottom cover. Torque to 95-105 in-lb (11-12 N•m).
14. Reinstall the muffler.
F
IG
. 9: Air Motor U-cup Installation
207
207
Lips face up
U-cup faces up.
Flange faces down.
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201
F
IG
. 10: Align Shield in Grooves on Covers
groove
groove
210
201
206
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