Bearing Housing & Connecting Rod - Graco LineLazert III 3900 Instructions-Parts List Manual

Bearing Housing and Connecting Rod
Removal
1.
Relieve pressure; page 4.
2. Fig. 2. Remove screws (27) and front cover (92).
3. Unscrew suction tube (12) from pump, hold
wrench on pump intake valve (A) to keep pump
from loosening.
4. Disconnect pump outlet hose (61) from displace-
ment pump outlet nipple (6).
5. Fig. 1. Use screwdriver to push up retaining spring
(95) at top of pump. Push out pin (96).
96
Fig. 1
6. Fig. 2. Loosen retaining nut (97). Unscrew and
remove displacement pump (119).
7. Remove four screws (26) and lockwashers (25)
from bearing housing (94).
8. Pull connecting rod (83) and lightly tap lower rear
of bearing housing (94) with plastic mallet to
loosen from drive housing (101). Pull bearing
housing and connecting rod assembly (83) off
drive housing.
9. Inspect crank (B) for excessive wear and replace
parts as needed.
Installation
1. Evenly lubricate inside of bronze bearing (C) in
bearing housing (94) with high-quality motor oil.
Liberally pack top roller bearing (E), lower bearing
(D) inside connecting rod assembly (83) with
bearing grease.
2. Assemble connecting rod (83) and bearing housing
(94).
8 309414
95
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 (101) with
holes in bearing housing (94). Push bearing hous-
ing onto drive housing or tap into place with plastic
mallet.
DO NOT use bearing housing screws (26) 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 (26) and lockwashers (25) on bear-
ing housing. Torque evenly to note 3 value in Fig. 2.
6. Refer to Displacement Pump, Installation, page 15.
92
7675B
27
3
25, 26
94
95
96
61
6
119
Oil
1
2 Pack with bearing grease 114819
LineLazer III 3900: Torque to 200 in-lb (22.6 N¡m)
3
LineLazer III 5900: Torque to 25 ft-lb (34 N¡m)
Fig. 2
CAUTION
B
E
2
D
2
F
83
C
1
97
12g
A
12
Model 233701 shown
101
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