Bearing Housing And Connecting Rod - Graco LINE LAZER A Series Instructions And Parts List

Bearing Housing and Connecting Rod

WARNING
To reduce the risk of serious bodily injury, always fol-
low the Pressure Relief Procedure W arning on
page 4 before repairing the sprayer.
NOTE: Steps 1 to 10 refer to Fig. 33.
1. Refer to Removing the Pump on page 16.
2. Remove the four screws (81) and lockwashers (46)
from the bearing housing (76).
3. While pulling the connecting rod assembly (79) with
one hand, lightly tap the lower rear of the bearing
housing (76) with a plastic mallet to loosen it from the
drive housing (77). 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 (76), and the inside of the con-
necting rod link (D), with high–quality motor oil. Liber-
ally pack the roller bearing (E) in the connecting rod
assembly (79) with bearing grease (77d), supplied.
6. Assemble the connecting rod (79) and bearing hous-
ing (76).
7. Clean the mating surfaces of the bearing and drive
housings.
8. Align the connecting rod with the crank (A) and care-
fully align the locating pins (F) in the drive housing
(77) with the holes in the bearing housing (76). Push
the bearing housing onto the drive housing or tap it
into place with a plastic mallet.
CAUTION
DO NOT use the bearing housing screw (81) to align
or seat the bearing housing with the drive housing.
These parts must be aligned using the locating pins
(F), to help avoid premature bearing wear.
9. Install the screws (81) and lockwashers (46) on the
bearing housing. Tighten the screws evenly to 175
in–lb (20 N.m).
10. Refer to Installing the pump on page 27.
Torque to 175 in–lb
(20 N.m)
C
79
80,59
81,46
59
72
15
74
71
73
Fig. 33
77
A
B
D
76
75
137
54
53
E