730C2 and 725C2 Articulated Truck Power Train Caterpillar

Center Axle - Remove and Install

Usage:

Removal Procedure

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	4C-8174	Guard	2
A	350-7768	Electric Hydraulic Pump Gp	1
B	1U-9200	Lever Puller Hoist	3
C	439-3939	Link Bracket As	4

Start By:

Remove the stabilizer rod for the center axle.
Remove the center axle oil cooler pump and motor.

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Personal injury or death can result from improper lifting or blocking.
When a hoist or jack is used to lift any part or component, stand clear of the area. Be sure the hoist or jack has the correct capacity to lift a component. Install blocks or stands before performance of any work under a heavy component.

Approximate weights of the components are shown. Clean all surfaces where parts are to be installed.

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NOTICE

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat^® products. Dispose of all fluids according to local regulations and mandates.

Note: Cleanliness is an important factor. Before the removal procedure, the exterior of the component should be thoroughly cleaned. This will help to prevent dirt from entering the internal mechanism.

Drain the oil from the center axle housing. Refer to Operation and Maintenance Manual, "Differential and Final Drive Oil - Change".
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Illustration 1 g06133361

Typical Example
Install Tooling (A) under the rear axle. Use Tooling (A) to raise the rear of the machine.
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Illustration 2 g06133413
Remove bolts (1) and plate (3) and reposition hose assemblies (2). Repeat step 3 to the opposite side of the frame.
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Illustration 3 g06135279
Attach Tooling (B) to the rear section of centre suspension frame (4) on each side of the machine as shown. The weight of centre suspension frame (4) is approximately 153 kg (337 lb).
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Illustration 4 g06135281

Typical Example
Use a suitable bar stock and clevis and attach Tooling (B) to the front of centre suspension frame (4) as shown. The weight of centre suspension frame (4) is approximately 153 kg (337 lb).
Remove the Centre drive shaft. Refer to Disassembly and Assembly, "Center Drive Shaft - Remove and install" for correct procedure.
Remove the tire and rim. Refer to Disassembly and Assembly, "Tire and Rim - Remove and Install" for correct procedure.
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Illustration 5 g06133368
Remove tube assembly (5).
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Illustration 6 g06133370
Remove bolts (6) and plate (7).
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Illustration 7 g06133372
Disconnect harness assembly (9) and reposition harness assembly (9).
Disconnect hose assemblies (8).
Remove tube assembly (10).
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Illustration 8 g06133406
Remove straps (14) and disconnect hose assemblies (12) and (14).
Remove tube assembly (11).
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Illustration 9 g06133414
Attach Tooling (C) and a suitable lifting device to axle (17). The weight of axle (17) is approximately 820 kg (1808 lb). Repeat step 15 to the opposite side of the axle.
Remove bolts (15) and (16).
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Illustration 10 g06133421
Use two people to remove bracket (20). The weight of bracket (20) is approximately 21 kg (46 lb). Remove bolts (19) and bracket (20).
Lower and remove axle (17).

Installation Procedure

Install axle (17) in the reverse order of the removal.
1. Tighten bolts (19) to a torque of 900 ± 100 N·m (664± 74lb ft)
2. Tighten bolts (18) to a torque of 270 ± 40 N·m (199 ± 230b ft).
3. Tighten bolts (16) to a torque of 900 ± 100 N·m (664± 74lb ft)
4. Tighten bolts (15) to a torque of 270 ± 40 N·m (199 ± 230b ft).