Drive Housing and Connecting Rod

Drive Housing and Connecting Rod

NOTE: The item numbers referenced are for the Hi-Boy models. The Lo-Boy models may have different item numbers. Use the Hi-Boy item number and part to find the corresponding Lo-Boy part and item number.

Removal

WARNING

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

1.Relieve pressure, page 5.

2.FIG. 1. Remove screws (10) and front cover (62).

3.Remove pump. Refer to Displacement Pump, Removal, page 14.

4.Remove four screws (18) from drive housing (49).

CAUTION

Thrust washers may stick to grease inside of drive housing. Do not lose or misplace.

5.Pull connecting rod (6) and lightly tap lower rear of drive housing (49) with plastic mallet to loosen from pinion housing (50). Pull drive housing and connecting rod assembly off pinion housing.

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

Installation

1.Evenly lubricate inside of bronze bearing (C) in drive housing (49) with high-quality motor oil. Liberally pack top roller bearing (E), lower bearing (D) inside connecting rod

(6) with bearing grease.

2.Assemble connecting rod (6) to drive housing (49). Rotate connecting rod to lowest position.

3.Apply grease to washers 52, 57 and 56. Install in order shown in FIG. 2.

4.Lubricate gears with 0.26 pint of 110293 grease (supplied with drive housing). Pack grease evenly around gears.

5.Clean mating surfaces of pinion and drive housings.

6.Align connecting rod with crank (B) and carefully align locating pins in drive housing (49) with holes in pinion housing (50). Push drive housing onto pinion housing or tap into place with plastic mallet.

CAUTION

DO NOT use drive housing screws (18) to align or seat bearing housing with drive housing. Align these parts with locating pins, to avoid premature bearing wear.

7.Install screws (18) in drive housing. Torque evenly to note 3 value in Fig. 1.

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





 



 

 

 



 



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FIG. 1







 Steel

%

WLD

 Copper

FIG. 2

8

310813 Rev C

Page 8
Image 8
Graco 3400 manual Drive Housing and Connecting Rod, Removal