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Bearing Housing and Connecting Rod
3A0243A 15
Bearing Housing and Connecting Rod
NOTE: The item numbers referenced are for the 5900
Hi-Boy models. The 3900, 7900 and all Lo-Boy models
may have different item numbers. Use the 5900 Hi-Boy
item number and part to find the corresponding alter-
nate part and item number.
Removal
1. Relieve pressure; page 4.
2. Remove four screws (45) and front cover (44)
3. Remove pump. Refer to Displacement Pump,
Removal, page 23.
4. Remove four screws (41) and washers (42) from
bearing housing (40).
5. Pull connecting rod (43) and lightly tap lower rear of
bearing housing with plastic mallet to loosen from
drive housing (33). Pull bearing housing and con-
necting rod assembly off drive housing.
6. Inspect crank (B) and connecting rod (43) for exces-
sive wear and replace parts as needed.
Installation
1. Evenly lubricate inside of bronze bearing (C) in
bearing housing (40) with high-quality motor oil. Lib-
erally pack top roller bearing (E), lower bearing (D)
inside connecting rod (43) with bearing grease.
2. Assemble connecting rod (43) to bearing housing
(40). Rotate connecting rod to lowest position.
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 (33) with
holes in bearing housing (40). Push bearing housing
onto drive housing or tap into place with plastic mal-
let.
5. Install screws (41) and washers (42) in bearing
housing. Torque evenly to note 3 value below.
6. Install pump. Refer to Displacement Pump,
Installation, page 14.
NOTICE
DO NOT use bearing housing screws (41) to align or
seat bearing housing with drive housing. Align these
parts with locating pins, to avoid premature bearing
wear.
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TIB
3
2
1
Oil
Pack with bearing grease 114819
GMAX II 3900: Torque to 200 in-lb (22.6 N•m)
GMAX II 5900: Torque to 25 ft-lb (34 N•m)
GMAX II 7900: Torque to 40 ft-lb (54 N•m)
TexSpray 5900HD: Torque to 40 ft-lb (54 N•m)
TexSpray 7900HD: Torque to 40 ft-lb (54 N•m)