Graco LubePro A4000, Instructions Manual

Page: 22 / 38

Parts: Oil Models
22 3A5266G
Repair Air Valve
Replace Complete Air Valve
1. Stop pump. Relieve pressure. See Pressure Relief
Procedure , page 11.
2. Disconnect the air line to the motor.
3. Remove four screws (211), then remove the air
valve (214 and gasket (209*
◆
). See Repair Air
Motor , page 24.
4. Repair the Air Valve. To install a replacement air
valve, continue with Step 5.
5. Align the new air valve gasket (209*
◆
) on the mani -
fold, then attach the air valve (214). Torque screws
(211) to 95-105 in-lb (11-12 N•m).
6. Reconnect the air line to the motor.
Replace Seals or Rebuild Air Valve
NOTE:
Air Valve Seal Kits are available (see page 30). Parts
marked with †.
Air Valve Repair Kits are available (see page 30).
Parts marked with
◆
.
Air Valve End Cap Kits are available (see page 30).
Parts marked with
❖
.
Disassemble the Air Valve (F
IG
. 25 and F
IG
. 26)
1. Stop pump. Relieve pressure. See Pressure Relief
Procedure , page 11.
2. Perform steps 2-3 under Replace Complete Air
Valve procedure.
3. Use a 2 mm or 5/64 hex key to remove two screws
(305
◆
). Remove the valve plate (309
◆
), cup (312
◆
),
and spring (311
◆
).
4. Remove the snap ring (310
❊
) from each end. Use
the piston to push the end caps (307
❊
) out of the
ends. Remove the end cap o-rings (306†
❊◆
).
F
IG
. 25
◆
311
◆
312
◆
305
309
ti12751