Pump Service
307427ZAF 11
Pump Service
Disconnecting the Air Motor
1. Flush the pump.
2. Relieve the pressure. Remove the pump from its
mounting.
3. See FIG. 6. Unscrew the tie rod locknuts (103).
4. Unscrew and remove the screw (105) and barrel
(104).
5. Raise the air motor (115) away from the
displacement pump (114). Unscrew the
displacement rod (15) from the air motor connecting
rod (S).
6. To order pump parts, refer to the parts lists on
pages 12–16. Refer to pages 17–33 for
displacement pump service and parts information.
Refer to manual 307456 for air motor service and
parts information.
Reconnecting the Air Motor
1. When reconnecting the air motor, use lithium base
grease on the threads of the displacement rod (15).
Make sure the o-ring (14) is in place on the rod.
2. Insert the muffler (T) into the air motor connecting
rod (S) as shown in FIG. 6.
3. Tighten the displacement rod (15) into the air motor
connecting rod hand tight, and install the barrel and
screw set (104 and 105).
4. Apply thread sealant to the threads of the tie rods
(106). To ensure proper alignment, first thread the
tie rod locknuts (106) loosely onto the tie rods, then
torque evenly to 15 N•m (8 ft-lb).
NOTE: Removing the muffler (T) will increase both
pump flow rate and exhaust noise.
5. Reconnect the groundwire if it was disconnected
during service.
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 8.
Grease the threads.
Apply thread sealant.
Torque evenly to 15 N•m (8 ft-lb).
FIG. 6
1
2
3
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