Bearing Housing And Connecting Rod - Graco 330GS Manual

Bearing Housing and Connecting Rod

Removal
1.
Relieve pressure; page 4.
2. Fig. 2. Remove screws (43) and front cover (42).
3. Remove drain hose (101). Unscrew suction tube
(31) from pump, hold wrench on pump intake valve
(A) to keep pump from loosening.
4. Fig. 1. Use screwdriver to push up retaining spring
(45) at top of pump. Push out pin (44) from con-
necting rod cross link.
44
45
Fig. 1
5. Fig. 2. Loosen retaining nut (16). Unscrew and
remove displacement pump (17).
6. Remove four screws (40) and lockwashers (27)
from bearing housing (52).
7. Pull connecting rod and lightly tap lower rear of
bearing housing (52) with plastic mallet to loosen
from drive housing (20). Pull bearing housing and
connecting rod assembly off drive housing.
8. Inspect crank (B) for excessive wear and replace
parts as needed.
Installation
1. Evenly lubricate inside of bronze bearing (C) in
bearing housing (52) with high-quality motor oil.
Liberally pack top roller bearing (E), lower bearing
(D) inside connecting rod assembly with bearing
grease.
2. Assemble connecting rod (53) and bearing housing
(52).
3. Clean mating surfaces of bearing and drive hous-
ings.
4. Align connecting rod with crank (B) and carefully
align locating pins (F) in drive housing (20) with
holes in bearing housing (52). Push bearing hous-
ing onto drive housing or tap into place with plastic
mallet.
DO NOT use bearing housing screws (40) to align
or seat bearing housing with drive housing. Align
these parts with locating pins (F), to avoid prema-
ture bearing wear.
5. Install screws (40) and lockwashers (27) on bear-
ing housing. Torque evenly to note 3 value in Fig. 2.
6. Refer to Displacement Pump, Installation, page 15.
7675B
B
1
F
Oil
1
Pack with bearing grease 114819
2
Torque to 200 in-lb (22.6 N
m)
3
Fig. 2
CAUTION
20
E
78
82
53
2
45
44
27
D
C
30
52
16
42
17
31 A
154
32
3
40
29
43
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