HOUSING 4N9850 - Caterpillar

Removal Procedure
Start By:
Install the steering frame lock. Refer to Disassembly and Assembly, "Steering Frame Lock - Remove and Install".
Personal injury can result from driveline torque windup under load.Unequal wheel speed can result in driveline torque windup which can cause driveline components to be under load during disassembly.Relieve the driveline torque windup before disassembly.
Lower the worktool to the ground.
Illustration 1 g01205264
Support center drive shaft (2) on suitable wood blocks.
Remove four bolts (4) . Remove guard (3) .
Remove four bolts (1) that fasten center drive shaft (2) to the output yoke of the output transfer gears.
Illustration 2 g01205265
Remove four bolts (5) that fasten the center drive shaft (2) to the front drive shaft yoke.
Use two people to remove center drive shaft (1) . The weight of center drive shaft (1) is approximately 38 kg (84 lb).Installation Procedure
Table 1
Required Tools    
Tool     Part Number     Part Description     Qty    
A     -     Loctite 7649 Primer N     -    
B     -     Loctite 263     -    
When the center drive shaft is installed, it must be installed in phase with the front and rear drive shafts. Serious component damage could occur. Be certain that all the joint group, all the yokes, and all the lubricating fittings are aligned.
Illustration 3 g01205265
Note: Prior to assembly, wipe the mounting surfaces of the bearing caps and the mounting surfaces of the yokes. Make sure both the mounting surfaces are clean.
Use two people to install center drive shaft (2) between the front drive shaft yoke and the output yoke of the output transfer gears. The weight of center drive shaft (2) is approximately 38 kg (84 lb).
Illustration 4 g00903158
Install four bolts (1) and four bolts (5) . Tighten bolts (1) and bolts (5) to a torque of 80 15 N m (60 11 lb ft). Use the numerical sequence shown in Illustration 4.
In numerical sequence, remove one bolt (5) at a time. Apply Tooling (A) and then apply Tooling (B) to the thread of bolt (5) . Install bolt (5) and tighten to a torque of 150 15 N m (110 11 lb ft).
Repeat Step 3 for the remaining bolts (5) .
Illustration 5 g01205264
In numerical sequence, remove one bolt (1) at a time. Apply Tooling (A) and then apply Tooling (B) to the thread of bolt (1) . Install bolt (1) and tighten to a torque of 150 15 N m (110 11 lb ft).
Repeat Step 5 for the remaining bolts (1) .
Remove the wood support blocks.
Install guard (3) . Install four bolts (4) .
Lubricate the center drive shaft. Refer to Operation and Maintenance Manual, "Drive Shaft Universal Joints, Splines, and Bearings - Inspect/Lubricate", for the correct lubrication procedure.End By: Remove the steering frame lock. Refer to Disassembly and Assembly, "Steering Frame Lock - Remove and Install".