Graco 24X856, Instructions And Parts

Page: 13 / 27

Repair
334644C 13
Repair Air Valve
Replace Complete Air Valve
1. Stop the pump at the middle of its stroke. Follow
Pressure Relief Procedure , page 12.
2. Disconnect the air line to the motor and the pilot
valve lines to the air valve (13).
3. If installed on air motor, remove reed switch kit and
solenoid from air valve (13).
4. Remove screws (23). Remove the air valve (13) and
gasket (27).
5. To repair the air valve, go to Disassemble the Air
Valve , page 13, step 1. To install a replacement air
valve, continue with step 6.
6. Align the new air valve gasket (27) on the manifold,
then attach the air valve (13).
NOTE: Use grease to hold the gasket (27) in place. Be
sure the bleed air hole in the gasket aligns with the
bleed port in the valve manifold.
7. Reattach the solenoid bracket and the solenoid.
8. Use screw to attach the reed switch assembly to the
new air valve. Be sure the sensor cables are con-
nected properly (see pump or package manual).
9. Reconnect the air line and pilot valve lines to the
motor.
Replace Seals or Rebuild Air Valve
See Kits and Accessories , page 22, to order kits for
your pump.
Disassemble the Air Valve
1. Perform steps 1–5 from Replace Complete Air
Valve , page 13.
2. Use a 2mm or 5/64 hex key to remove two screws
(109). Remove the valve plate (105).
3. Remove the two-piece cup assembly (112, 113,
123), and spring (111).
4. Remove the snap ring (110) from each end. Use the
piston (102) to push the end caps (107, 117) out of
the ends. Remove end cap o-rings (106, 117).
5. Slide out the piston (102). Remove the u-cup seals
(108) from each end and the detent assembly (103)
and detent cam (104) from the center.
F
IG
. 3 Air Valve
F
IG
. 4