Repair - Pneumatic Motor; Pneumatic Valve - Graco Python XL-DA25 Series Instructions And Parts

Repair - Pneumatic Motor

Pneumatic Valve

Replace Complete Pneumatic Valve
1. Stop the pump. Follow Pressure Relief Procedure,
page 11.
2. Disconnect the pneumatic line to the motor.
3. See the figure on page 31. Remove four screws
(218). Remove the pneumatic valve (217) and gas-
ket (216*).
4. To repair the pneumatic valve, go to Disassemble
the Pneumatic Valve, page 19. To install a replace-
ment pneumatic valve (217), continue with step 5.
5. Align the new pneumatic valve gasket (216*) on
the manifold, then attach the pneumatic valve (217).
Torque screws (218) to 95-105 in-lb (11-12 N•m).
6. Reconnect the pneumatic line to the motor.
3A6831A
Replace Seals or Rebuild Pneumatic Valve
Inspect and replace seals and worn parts while disas-
sembling and reassembling the pneumatic valve on the
next following pages.
Use F . 12 and the following table to identify the kits
IG
needed for replacements:
Symbol Kit Description
† Pneumatic Valve Seal Kits. See page 34

Pneumatic Valve Repair Kits. See page 34.

Pneumatic Valve End Cap Kits. See
page 34.
Disassemble the Pneumatic Valve
1. Perform steps 1-3 under Replace Complete Pneu-
matic Valve, page 19.
2. See F . 12. Use a 2 mm or 5/64 in. hex key to
IG
remove two screws (309†). Remove the valve
plate (305), cup (312), and spring (311).
3. See F . 12. Remove the snap ring (310) from
IG
each end. Use the piston to push the end caps
(307) out of the ends. Remove end cap o-rings
(306†).
4. Remove the piston (302). Remove the u-cup seals
(308†) from each end, and the detent assembly
(303) and detent cam (304) from the center.
Repair - Pneumatic Motor
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