Graco 3A0149E Repair Kits, Fan Valve Replacement, Complete Gun Packing Repair, Seat Repair

Repair

Repair

Repair Kits

NOTE:

•Seal Repair Kit 249422 is available. For best results, use all the new parts in the kit. Kit parts are marked with an asterisk, for example (7*).

•Plastic Seat Repair Kit 249424 and Carbide Seat Repair Kit 249456 are available and can be used with both Model G15 guns and Model G40 guns. For best results, use all new parts in the kit. Kit parts are marked with a symbol in the Parts list, for example (5c†).

•Plastic Seat Kit 249424 is intended for low pressure usage.

Fan Valve Replacement

1. Relieve the pressure, page 10.

2. Unscrew the fan valve packing nut (A) from the back of the gun body (1). Slide the fan valve assembly (4) out of the gun body. See FIG. 34.

3. Before reinstalling, turn the pattern adjustment valve

(C) of the replacement fan valve assembly (4) com- pletely counterclockwise to prevent damage to the seat (5c). Install the replacement fan valve assem- bly into the gun body (1). Screw the packing nut (A) into the gun body and torque to 90 in-lb (10.5 N•m).

1 4

C

1 A

1 Torque to 90 in-lb (10.5 N•m).

TI6576A

FIG. 34

Complete Gun Packing Repair

Disassembly

Seat Repair

NOTE:

•See Repair Kits, page 20.

•Clean parts with a solvent that is compatible with the parts and the fluid being sprayed.

1.Relieve the pressure, page 10. Remove the fluid and air hoses from the gun.

2.Remove the air cap retaining ring (6), air cap (21), and spray tip (33). See FIG. 35.

6

33 21 TI6568A

FIG. 35

3.Trigger the gun to pull the needle housing off the seat while you unscrew the diffuser (5) from the gun body (1), using the gun tool (30).

4.Inspect the o-rings (5e*, 5f*, and 5g*) in place. Carefully remove the o-rings from the diffuser hous- ing (5a) and replace if necessary.

5.Remove the seat nut (5d), seat (5c) and seat gasket (5b, carbide models only) using a 7/32 in. hex wrench.

6.Inspect the seat (5c) and seat gasket (5b) and replace if necessary.

20 3A0149E