Graco 231-033 Instructions-Parts List Manual page 32

BEARING HOUSING & CONNECTING ROD REPLACEMENT
PACK WITH
C
BEARING GREASE
68
B
OIL
25,23
TORQUE TO
175 in-lb (19 N.m)
49
42
43
47
76
99
Fig 32–1
WARNING
To reduce the risk of serious injury, follow the illus-
trated Pressure Relief Procedure
page 24 whenever you are instructed to relieve
pressure.
NOTE: Read the GENERAL REP AIR INFORMATION
on page 24 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.
67
E
69
F
70
40
223
warning on
2. Remove the front cover (49). For the upright sprayer
only, unclip the drain hose (99) from the pump. Hold
a wrench on the pump intake valve (223) and un-
screw 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 displacement
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 hous-
ing (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. Liber-
ally pack the roller bearing (C) with bearing grease.
9. Assemble the connecting rod (68) and bearing hous-
ing (69).
10. Clean the mating surfaces of the bearing and drive
housings (69,67).
11. Align the connecting rod (68) with the crank (E) and
the drive housing locating pins with the bearing hous-
ing (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). Tighten
the screws evenly to 175 in-lb (19 N.m).
13. Install the pump. See page 38.
14. Install the remaining parts. See Fig 32–1 .