Displacement Pump - Graco EM 5000 Instructions-Parts List Manual

Removing and Installing the Pump
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 6.
Removing the pump. (See Fig. 36)
1. Flush the pump. Relieve the pressure.
2. Remove the spring clips (100,102) and drain hose
(101).Hold the intake valve (423) with a wrench and un-
screw the suction tube (30). Remove the hose (59).
3. Push the retaining spring (26) up. Push the pin (25)
out the rear.
4. Loosen the locknut (27). Unscrew the pump. See be-
low for how to repair the pump.
25
27
30
Fig. 36
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 6.
Disassembly
1. Relieve the pressure. Remove the pump from the
sprayer. See page above.
2. Disassemble the intake valve. See Fig. 38.
3. Clean and inspect the parts. Replace any worn or
damaged parts. Use a new o–ring (401* ). If no fur-
ther service is needed, reassemble the intake valve
and torque it into the cylinder to 146 N.m.
26
59
100
101
102
0477

Displacement Pump

Installing the pump. (See Fig. 37)
1. Screw the pump about 3/4 of the way into the bearing
housing (21). Hold the pin (25) up to the pin hole on
the connecting rod (22) and continue screwing in the
pump until the pin slides easily into the hole.
2. Back off the pump until the top threads of the pump
cylinder are flush with the face of the bearing housing
and the outlet nipple faces back.
3. Push the retaining spring (26) into the groove all the
way around the connecting rod. Tighten the locknut
(27) to 97 N.m using a 2–1/4 in. open end wrench and
a light hammer.
4. Install the front cover and screws. Connect the pump
outlet hose. Install the suction tube parts. Install the
spring clips and drain hose.
25
22
26
FACE OF
BEARING
HOUSING
Fig. 37
*404
*401
423
TORQUE TO
146 N.m
Fig. 38
21
27
TORQUE TO
97 N.m
0031
419
420
421*