Motor - Graco 231–373 Instructions-Parts List Manual

Bearing Housing and Connecting Rod
WARNING
FLUID INJECTION HAZARD
To reduce the risk of serious injury,
follow the illustrated Pressure Relief
Procedure warning on page 13 when-
ever you are instructed to relieve pressure.
NOTE: Read the GENERAL REP AIR INFORMATION
on page 19 before doing this procedure.
NOTE: Stop the sprayer at the bottom of its stroke to get
the crank (E) in its lowest position.T o lower the
crank manually, carefully rotate the blades of the
fan with a screwdriver.
1. Relieve pressure.
2. Remove the front cover (49). Unclip the drain hose
(36) from the pump. Hold a wrench on the pump
intake valve (223) and unscrew the pump suction
tube. Disconnect the pump hose (70).
3. Push up the retaining spring (42). Push the pin
(43) out the rear.
4. Loosen the locknut (47). Unscrew the displace-
ment pump (76).
5. Remove the four screws and lockwashers (25,23).
6. Lightly tap the lower rear of the bearing housing
(69) with a plastic mallet to loosen it from the drive
housing (67). Pull the bearing housing and the
connecting rod assembly (68) straight off the drive
housing.
7. Remove the pail bracket assembly (F) and install it
on the new bearing housing.
8. Inspect the crank (E) for excessive wear and
replace parts as needed. Evenly lubricate the
inside of the bronze bearing (B) with high quality
motor oil. Liberally pack the roller bearing (C) with
bearing grease.
9. Assemble the connecting rod (68) and bearing
housing (69).
10. Clean the mating surfaces of the bearing and drive
housings (69,67).
Replacement (Fig. 19)
11. Align the connecting rod (68) with the crank (E)
and the drive housing locating pins (G) with the
bearing housing (69) holes. Push the bearing
housing onto the drive housing or tap it into place
with a plastic mallet.
CAUTION
DO NOT use the bearing housing screws (25) to try
to align or seat the bearing housing; the bearing and
drive housing will not align properly and will result in
premature bearing wear.
12. Install the screws and lockwashers (25,23). Tight-
en the screws evenly to 175 in-lb (19 N.m).
13. Install the pump. See page 32.
14. Install the remaining parts. See Fig. 19 .
PACK WITH
C
BEARING GREASE
68
B
OIL
25,23
TORQUE TO
175 in-lb (19 N.m)
49
42
43
47
F
76
223
Fig. 19
E
67
G
69
40
70
99