Graco LubePro A4000 Instructions Manual page 26

Parts: Oil Models
Reassemble the Air Motor (F
31)
NOTE: For easier reassembly, start with the top cover
(210) turned over on the workbench and assemble the
air motor upside-down.
1. Lubricate and install the o-ring (202*) on the top
cover (210).
2. Lubricate the inside of the cylinder (205). Lower the
cylinder onto the top cover (210).
3. Install the shield (206) around the cylinder (205) and
in the groove on the top cover (210).
4. Lubricate and install a new u-cup seal (207*) in the
bottom of the bearing in the bottom cover (201).
The lips must face down. Lubricate and install a
new u-cup seal (207*) in the top of the bearing. Lips
must face up to install the retaining ring (217).
*207
*207
F . 30
IG
5. Lubricate and install the o-ring (202*) on the bottom
cover (201).
6. Carefully push the threaded end of the rod (218) up
through the bottom cover (201).
7. Apply 16G561 adhesive to the threads of the rod
(218). Screw the piston (219) onto the rod. Place
the piston in a vise with soft jaws and torque to
35-40 ft-lb (47-54 N•m).
8. Lubricate and install the o-ring (204*) on the piston
(219).
9. Carefully place the bottom cover/piston assembly
on the cylinder (205), sliding the piston (219) into
26
. 30 and F .
IG IG
Lips face up
Lips face down.
the cylinder. The manifold surfaces of the top and
bottom covers must align. Be sure the shield (206)
is in the groove on both the top and bottom covers.
201
groove
206
groove
F . 31
IG
10. Install the tie bolts (212) hand tight.
11. Install two gaskets (208*) on the manifold (220).
Install the manifold (220). Torque screws (211) to
95-105 in-lb (10.7-11.9 N•m).
NOTE: The manifold is reversible for ease of placement
of muffler or remote exhaust.
12. Align the air valve gasket (209*◆†) on the manifold,
then attach the air valve (214). Torque screws (211)
to 95-105 in-lb (11-12 N•m).
13. Tighten the tie bolts (212) halfway. Work in a criss-
cross pattern. Check that the shield (206) remains
in the grooves on both covers. Continue tightening
the bolts in pattern to 11-13 ft-lb (15-18 N•m).
14. Lubricate and install pilot valves (213) in top and
bottom cover. Torque to 95-105 in-lb (11-12 N•m).
15. See Air Motor Installation on page 27.
210
3A5266G