Graco B Series Instructions-Parts List Manual page 18

Bearing Housing & Connecting Rod
WARNING
To reduce the risk of a serious injury, always shut
off the engine and disconnect the spark plug before
performing any checks or service.
1. Refer to Removing the Pump on page 15.
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 19.
5. Evenly lubricate the inside of the bronze bearing
(E) in the bearing housing (23), and the inside of
the connecting rod link (C), with high-quality motor
oil (do not use grease). Liberally pack the roller
bearing (B) in the connecting rod assembly (22)
with bearing grease (20d), supplied.
6. Assemble the connecting rod (22) and bearing
housing (23).
7. Clean the mating surfaces of the bearing (23) and
drive (20) housings.
8. Align the connecting rod with the crank (A) and
carefully align the locating pins (D) 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 (D), to help
avoid premature bearing wear.
18 308269
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 15.
2
23
48,49
3
21
4
Liberally pack with
1
bearing grease,
supplied
Lubricate with
2
high quality
motor oil
Torque to
3
25 ft–lb (34 N.m)
See page 10 for
4
how to remove
pump
Fig. 15
20
A
1
B
C
22
D
E
2
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