Challenger 35, Challenger 45 and Challenger 55 Agricultural Tractors Power Train Caterpillar

Center Housing (Differential Steering) - Remove

Usage:

45 1DR

Removal Procedure

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	1U-9760	7 Ton Stands	2
B	138-7574	Link Brackets	3

Start By:

Remove two rear axles. Refer to Disassembly and Assembly, "Rear Axle - Remove" for the machine that is being serviced.
Remove the cab. Refer to Disassembly and Assembly, "Cab - Remove".
Remove the implement valve and the hitch valve. Refer to Disassembly and Assembly, "Implement and Hitch Valve - Remove".
Remove the steering motor. Refer to Disassembly and Assembly, "Steering Motor - Remove".
Remove the lift arm. Refer to Disassembly and Assembly, "Hitch (Lift Arm) - Remove and Install".
Remove the lift link. Refer to Disassembly and Assembly, "Hitch (Lift Link) - Remove and Install".
Remove the lower link. Refer to Disassembly and Assembly, "Hitch (Lower Link) - Remove".
Remove the rockshaft. Refer to Disassembly and Assembly, "Rock Shaft - Remove" for the machine that is being serviced.
Remove the power take-off clutch. Refer to Disassembly and Assembly, "Power Take-Off Clutch - Remove" for the machine that is being serviced.
Remove the driven gear for the power take-off. Refer to Disassembly and Assembly, "Power Take-Off Driven Gear - Remove" for the machine that is being serviced.
Remove the parking brake. Refer to Disassembly and Assembly, "Parking Brake - Remove " for the machine that is being serviced.

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

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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, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products. Dispose of all fluids according to local regulations and mandates.

Note: Put identification marks on all lines, on all hoses, on all wires, and on all tubes for installation purposes. Plug all lines, hoses, and tubes. This helps to prevent fluid loss and this helps to keep contaminants from entering the system.

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Illustration 1	g00692585

Note: The axle with the 20 hole pattern is for the tractors with a 2032 mm (80.0 inch) base.

Note: The axle with the 16 hole pattern is for the tractors with a 1524 mm (60 inch) base which is shown in this story.

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Illustration 2	g00692594

Identify two hose assemblies (1). Remove the hose assemblies from steering pump (2).
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Illustration 3 g00692598
Identify electrical connectors (3) and disconnect the connectors. Disconnect tube assembly (5) and one hose assembly (4) from charge pump (6).
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Illustration 4 g00692613
Disconnect both ends of tube assembly (7). Remove the tube assembly from steering pump (2).
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Illustration 5 g00692616
Disconnect hose assembly (8) from compensator valve (9). Disconnect tube assembly (11) from implement pump (10). Remove hose assemblies (8) and (11).
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Illustration 6 g00692625
Disconnect hose assembly (12) from extension housing (13). Disconnect tube assembly (14) from tube (15).
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Illustration 7 g00692636
Loosen banjo bolt (16). Remove tube (15) from implement pump (10) and cover (17).
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Illustration 8 g00692647
Remove eight bolts and washers (18). Remove pump suction tube assembly (19) from the center housing and from charge pump (6). Disconnect tube assembly (20) from steering pump (2). Disconnect tube assembly (21) at the steering pump and remove tube assembly (21) from the machine.
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Illustration 9 g00692657
Install two lifting straps to implement pump (10) and charge pump (6). Attach to a suitable lifting device.
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Illustration 10 g00692661

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Illustration 11 g00692665
Remove nine bolts (22) from pump drive (23) and remove the pumps as a unit from the machine. The weight of the pumps is 182 kg (400 lb).
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Illustration 12 g00692672
Disconnect tube assembly (14) from the hydraulic oil filter base (not shown). Remove tube assembly (14) from the machine.
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Illustration 13 g00692676

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Illustration 14 g00692678
Disconnect tube assembly (25) from fitting (24). Repeat the process for the other side. Remove bolt (27) from clip (26). Remove tube assembly (25) from the machine.
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Illustration 15 g00692689

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Illustration 16 g00692691
Disconnect tube assemblies (28) and (29) from cooler bypass valve (30). Remove the bolt and nut (31) that holds clamp (32) to bracket (33). Remove tube assemblies (28) and (29) from the machine.
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Illustration 17 g00692705
Remove two bolts and washers (35) from bracket (34). Position the wire harnesses and the battery cables out of the way.
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Illustration 18 g00692709
Remove the dipstick and tube (36) from the center housing.
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Illustration 19 g00692717

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Illustration 20 g00692721
Install tool (A) under hardbar (37). Repeat this process for the other side.
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Illustration 21 g00692730
Install tool (B) on center housing assembly (39) and to cover (38). Attach tool (B) to a suitable lifting device.
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Illustration 22 g00692736

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Illustration 23 g00692742
Identify 28 bolts (40) and remove bolts (40) from center housing (39). Remove center housing (39) from extension housing (13).