725C Articulated Truck Power Train Caterpillar

Differential and Bevel Gear (Center) - Remove and Install

Usage:

725C LFB

Removal Procedure

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	169-6969	Threaded Rod⁽¹⁾	2
B	138-7574	Link Bracket	2
C	1U-8846	Gasket Sealant	-

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⁽¹⁾	Cut to a length of 100 mm (4 inch)

Start By:

Remove the center drive shaft.
Remove the center axle shafts.
Remove the parking brake.

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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.

Drain the oil out of the center differential and final drives. Refer to Operation and Maintenance Manual, "Differential and Final Drive Oil - Change" for the correct procedure.
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Illustration 1 g01198582
Disconnect hose assembly (1) from differential housing (2).
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Illustration 2 g01198586
Remove two of bolts (3). Install Tooling (A) (not shown). Remove the remaining nine bolts (3) that secure differential housing (2) to axle housing (4).
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Illustration 3 g01198592

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Illustration 4 g01198594
Install four of bolts (3), which were removed in Step 3, into the threaded holes in differential housing (2). Tighten four of bolts (3) evenly in order to break the seal between differential housing (2) and axle housing (4). Continue to withdraw differential housing (2) out of axle housing (4) until there is a gap of approximately 10 mm (0.4 inch) before allowing the differential to be supported by Tooling (A). Remove two of bolts (4) from the top of differential housing (2).
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Illustration 5 g01198539
Install a suitable bar across the frame rails of the chassis in order to support differential housing (2). Install Tooling (B) into the two threaded holes in the top of differential housing (2). Attach a suitable lifting device to Tooling (B) and the support bar. Carefully remove differential (2) from axle housing (4) and Tooling (A). The weight of differential housing (2) is approximately 280 kg (617 lb).
Carefully lower differential housing (2) onto a suitable pallet fork and remove differential housing (2) from the machine.

Installation Procedure

Install differential and bevel gear (center) in the reverse order of removal.
1. Apply Tooling (C) to the contact surface of the axle housing.
2. Tighten bolts (3) to a torque of 270 ± 40 N·m (200 ± 30 lb ft).