Graco 224342 A Series, Instructions Manual

Page: 13 / 28

Repair
308116V 13
Repair
Disconnect the Displacement
Pump
1. Perform Flush the Equipment procedure, page 9.
Stop the pump at the bottom of its stroke.
2. Perform the Pressure Relief Procedure , page 9.
3. Disconnect the air and fluid hoses. Remove the
pump from its mounting.
NOTE: Note the relative position of the pump fluid
outlet (R) to the air motor air inlet (S).
4. Unscrew the tie rod locknuts (102) from the tie rods
(103). Remove the cotter pin (111).
5. Unscrew the displacement rod (13) from the air
motor (108). Carefully pull the displacement pump
(101) off the air motor (108).
6. Inspect the o-ring (110). See F
IG
. 2, page 14.
NOTE: To service the displacement pump, refer to
Disassemble the Displacement Pump , page 15,
and Assemble the Displacement Pump , 15. To
service the air motor, refer to the separate motor
manual, supplied.-
Connect the Displacement
Pump
1. Lubricate the o-ring (110) and check that it is in
place on the displacement rod (13).
2. Align the pump fluid outlet (R) with the air motor air
inlet (S) as was noted in step 2 under Disconnecting
the Displacement Pump. Position the displacement
pump (101) on the tie rods (103). See F
IG
. 2, page
14.
3. Screw the locknuts (102) onto the tie rods (103)
loosely.
4. Screw the displacement rod (13) into the shaft of
the air motor (108) until the pin holes in the rod and
shaft align. Install the cotter pin (111).
5. Apply thread sealant to the pump fluid outlet (R)
and the threads of the fluid hose.
6. Mount the pump and reconnect all hoses.
Reconnect the ground wire if it was disconnected
during repair.
7. Tighten the packing nut/wet-cup (2) so it is snug.
Fill the wet-cup with TSL or compatible solvent.
8. Tighten the tie rod locknuts (102):
- Model 224342: Torque to 20-30 ft-lb (27-41
N•m)
- Models 224343, 902147, 247147, 261630:
Torque to 10-15 ft-lb (14-20 N•m).
9. Start the pump and run it at about 40 psi (0.3 MPa,
2.8 bar) air pressure, to ensure proper pump
operation.
10. Check for fluid leakage at the packing nut/wet-cup
(2). Perform the Pressure Relief Procedure ,
page 9, before tightening the packing nut/wet-cup.