Graco 223843, Instructions Manual

Page: 13 / 24

13 308106
Service
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 9.
DISCONNECTING THE DISPLACEMENT
PUMP
1. Flush the pump if possible. Stop the pump at the
bottom of its stroke. Relieve the pressure.
2. Disconnect the air and fluid hoses. Remove the
pump from its mounting. Note the relative position
of the pump’s fluid outlet to the air motor’s air inlet.
3. Unscrew the tie rod locknuts (106) from the tie
rods (110). Remove the cotter pin (105). Unscrew
the displacement rod (19) from the air motor (101).
Carefully pull the displacement pump (102) off the
air motor (101). See Fig 3.
4. Refer to page 14 for displacement pump service.
To service the air motor, refer to the separate air
motor manual (306982 or 307043), supplied.
RECONNECTING THE DISPLACEMENT
PUMP
1. Screw the displacement rod (19) into the base of
the air motor (101). Install the cotter pin (105).
Orient the pump’s fluid outlet to the air motor’s air
inlet as was noted in step 2 under Disconnecting
the Displacement Pump. See Fig 3.
2. Position the displacement pump (102) on the tie
rods (110). Screw the locknuts (106) onto the tie
rods (110) loosely.
3. Mount the pump and reconnect all hoses. Recon-
nect the ground wire if it was disconnected during
repair. Torque the packing nut/wet--cup (4) to
18--20 ft--lb (24--27 N.m). Fill the wet--cup with
Graco Throat Seal Liquid or compatible solvent.
4. Tighten the tie rod locknuts (106) evenly, and
torque to 25--30 ft--lb (34--41 N.m).
5. Start the pump and run it at about 40 psi (280 kPa,
2.8 bar) air pressure, to check that it is operating
properly.
1
3
2
107
4
110
105
102
101
19
106
MODEL
223843
SHOWN
Torque President to 25--30 ft-lb (34--41 N.m);
Monark to 15--20 ft-lb (20--27 N.m)
Torque to 18--20 ft-lb (24--27 N.m)
1
2
Torque to 25--30 ft-lb (34--41 N.m)
3
Fig. 3