Bearing Housing And Connecting Rod; Fig. 18; Ft-Lb - Graco Roof Rigs 224483 Instructions-Parts List Manual

Bearing Housing and Connecting Rod

WARNING
To reduce the risk of serious injury, always follow
the Pressure Relief Procedure on page 8 before
repairing the sprayer.
NOTE: Steps 1 to 10 refer to Fig. 18.
1. Refer to Removing the pump on page 18.
2. Remove the screws (48) and lockwashers (49) from
the bearing housing (23).
3. While pulling the connecting rod assembly (22) with
one hand, lightly tap the lower rear of the bearing
housing (23) with a plastic mallet to loosen it from the
drive housing (20). Pull the bearing housing and the
connecting rod assembly off the drive housing.
4. Inspect the crank (A) for excessive wear and replace
the drive housing. See page 23.
5. Evenly lubricate the inside of the bronze bearing (C)
in the bearing housing (23), and the inside of the con-
necting rod link (D), with high–quality motor oil (do
not use grease). Liberally pack the roller bearing (E)
in the connecting rod assembly (22) with bearing
grease (20d), supplied.
6. Assemble the connecting rod (22) and bearing hous-
ing (23).
7. Clean the mating surfaces of the bearing (23) and
drive (20) housings.
8. Align the connecting rod with the crank (A) and care-
fully align the locating pins (B) in the drive housing
(20) with the holes in the bearing housing (23). 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 (48) to align
or seat it with the drive housing. These parts must be
aligned using the locating pins (B), to help avoid prema-
ture bearing wear.
9. Install the screws (48) and lockwashers (49) on the
bearing housing. Tighten the screws evenly to
25 ft–lb (34 N.m).
10. Refer to Installing the pump on page 18.
E
D
TORQUE TO
22
25 ft–lb
(34 N.m)
23
49
48

Fig. 18

20
A
B
C
0400