Service
Required Tools
DSet of adjustable wrenches
DTorque wrench
DVise
DThread lubricant
Disconnecting Displacement Pump
1.Fig. 3. Flush pump, if possible. Stop pump at bottom of its stroke.
WARNING
To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 8.
2.Relieve the pressure.
3.Disconnect air hose and fluid hose.
4.Disconnect displacement pump (109) from motor (101) as follows. Note relative position of pump’s fluid outlet (U) to air inlet (V) of motor. If motor does not require servicing, leave it attached to its mounting.
CAUTION
If you are disconnecting the displacement pump from a motor which is still mounted (for example, on a wall bracket), be sure to support the displacement pump while it is being disconnected, to prevent it from falling and causing injury or property damage.
5.Using needle nose pliers, remove cotter pin (107) from clevis pin (106). Remove clevis pin from displacement rod (1).
6.Hold tie rod flats with wrench to keep rods from turning. Unscrew nuts (108) from tie rods (105). Carefully remove displacement pump (109) from motor (101).
7.Refer to page 14 for displacement pump service. To service air motor, refer to separate motor manual, 308995.
Reconnecting the Displacement Pump
1.Fig. 3. Reconnect displacement pump (109) to motor (101) (see CAUTION at left). Orient pump’s fluid outlet (U) to air inlet (V) as noted in step 4 under Disconnecting the Displacement Pump. Position displacement pump (109) on tie rods (105).
2.Insert clevis pin (106) through piston rod (W) and displacement rod (1). Install cotter pin (107).
3.Screw nuts (108) onto tie rods (105) and tighten.
4.Reconnect all hoses. Reconnect ground wire if disconnected. Fill wet cup (2) 1/3 full of Graco Throat Seal Liquid or compatible solvent.
5.Turn on air supply. Run pump slowly to ensure proper operation.
WARNING
To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 8.
12 308996
