Drive Housing And Connecting Rod - Graco 3400 Repair Manual

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. F . 1. Remove screws (10) and front cover (62).
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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 F . 2.
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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.
8
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.
F . 1
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F . 2
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Drive Housing and Connecting Rod
Steel
Copper
310813 Rev C