Bearing Housing and Connecting Rod, Removal

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

WARNING

Read Injection Hazard, page 3; Burn Hazard, page 4

1.Relieve pressure; page 5.

2.F IG . 1. Remove four screws (45) and front cover (44)

3.Remove pump. Refer to Displacement Pump, Removal, page 16.

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 connecting rod assembly off drive housing.

6.Inspect crank (B) and connecting rod (43) for excessive wear and replace parts as needed.

Installation

1.Evenly lubricate inside of bronze bearing (C) in bearing housing (40) with high-quality motor oil. Liberally 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 housings.

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 mallet.

CAUTION

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.

5.Install screws (41) and washers (42) in bearing housing. Torque evenly to note 3 value in Fig. 1.

6.Install pump. Refer to Displacement Pump, Installation, page 14.


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		TIB
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1Oil

2Pack with bearing grease 114819

3GMAX 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 7900HD: Torque to 40 ft-lb (54 Nm

FIG. 1

310893L

Hitachi 3900 Bearing Housing and Connecting Rod, Removal, Installation

Models: 3900