Bearing Housing And Connecting Rod - Graco GM3500 Instructions-Parts List Manual

Bearing Housing and Connecting Rod

WARNING
To reduce the risk of serious bodily injury always
follow the Pressure Relief Procedure Warning on
page 12 before checking, adjusting, cleaning or
shutting down the sprayer.
NOTE: Steps 1 to 10 refer to Fig. 11.
1. Remove the pump. See page 17.
2. Remove the four screws (69) and lockwashers
(70) from the bearing housing (21).
3. While pulling the connecting rod assembly (22)
with one hand, lightly tap the lower rear of the
bearing housing (21) 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 parts as needed.
5. Evenly lubricate the inside of the bronze bearing
(C) in the bearing housing (21), and the inside of
the connecting rod link (D), with high-quality motor
oil. Liberally pack the roller bearing (E) in the
connecting rod assembly (22) with bearing grease.
6. Assemble the connecting rod (22) and bearing
housing (21).
7. Clean the mating surfaces of the bearing and drive
housings.
8. Align the connecting rod with the crank (A). Align
the locating pins (F) in the drive housing (20) with
the holes in the bearing housing (21). Push the
bearing housing onto the drive housing or tap it
into place with a plastic mallet.
CAUTION
Use only the locating pins (F) to align or seat the
bearing housing (21) with the drive housing (20).
9. Install the screws (69) and lockwashers (70) on the
bearing housing. Tighten the screws evenly to 300
20 in-lb (34 2.3 N m).
10. Install the pump. See above.
Torque to 300 20 in-lb
(34 2.3 N m)
E
D
22
C
69,70
64
26
25
27
28
30
Fig. 11
20
11
A
F
24
21
55
83
92
91
90