Drive Housing and Connecting Rod
8310813D
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
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).
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.
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.

FIG. 2

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

CAUTION

Thrust washers may stick to grease inside of drive

housing. Do not lose or misplace.

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.

FIG. 1

49
9
10 62
10
18
6
8
4
A
54
17
12
15
50
ti5527a
18
B
1
2
Oil
Pack with bearing grease 110293
3Torque to 130 - 150 in-ib (14 - 16.9 N m)
3
D
2E2
1C
56
57
52
5
93
56
B
57
52
ti5990a
1
2
1
2
Steel
Copper