Repair

Repair Air Motor

NOTE: Complete Air Motor Replacement Kits are avail- able. Order 24G693 (2.5 in. motor) or 24G694 (3.5 in. motor).

NOTE: Air Motor Seal Kits are available. See page 33 for the correct kit for your motor. Parts included in the kit are marked with an asterisk (*). For best results, use all the parts in the kit.

Disassemble the Air Motor

1.See FIG. 14. Use a 10 mm socket wrench to remove four screws (211). Remove the air valve (214) and gasket (209*†).

2.Remove four screws (211) and remove the manifold

(220)and two gaskets (208*).

3.Use a 10 mm socket wrench to remove the pilot valves (213) from the top and bottom cover.

4.Use a 13 mm socket wrench to remove the tie bolts

(212).

5.Remove the top cover (210). Remove the o-ring (202*). On 3.5 in. motors only, remove the plug

(231)and o-ring (230*).

6.Remove the shield (206) and cylinder (205).

7.Remove the o-ring (204*) from the piston.

8.Secure the piston (219) in a vise with soft jaws. Use a wrench on the flats of the rod (218) to remove the rod and bottom cover assembly (201) from the pis- ton.

9.Remove the rod from the bottom cover assembly.

10.Remove retaining ring (217), u-cup seals (207*), and o-ring (202*) from the bottom cover.

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.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.See FIG. 13. Lubricate and install new u-cup seal (207*) in the bottom of the bearing in the bottom cover (201). The lips must face down. Lubricate and install new u-cup seal (207*) in the top of the bear- ing. Lips must face up Install retaining ring (217).

*207

Lips face up

*207

Lips face down.

ti16285a

FIG. 13. Air Motor U-cup Installation

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3A0732J

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Graco 3A0732J important safety instructions Repair Air Motor, Air Motor U-cup Installation

3A0732J specifications

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