730C2 and 725C2 Articulated Truck Power Train Caterpillar

Transmission - Remove and Install

Usage:

Removal Procedure

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	5P-7306	Engine Turning Tool	1
A	5P-7305	Engine Turning Tool	1
B	207-8157	Bracket	2
B	208-5040	Tube	1
C	207-8158	Spacer	4
D	1U-9203	Lever Puller Hoist	2
F	-	Loctite 263	-
F	-	Loctite 270⁽¹⁾	-

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⁽¹⁾	For use in EAME only

Start By:

Remove the electric starting motor.
Remove piston pump (brake, ejector, and fan).
Remove piston pump (steering).
Remove gear pump (output transfer gear).

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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 coolant. Refer to Operation and Maintenance Manual, "Cooling System Coolant (ELC) - Change" for the correct draining and filling procedures.
Drain the transmission. Refer to Operation and Maintenance Manual, "Transmission Oil - Change" for the correct draining and filling procedures.
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Illustration 1 g03662954
Disconnect hose assembly (2) from the transmission. Disconnect hose assemblies (1) from gear pump (ATTAC fan) (4). Remove bolts (3) and washers. Remove gear pump (ATTAC fan) (4) and the O-ring seal.
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Illustration 2 g03663118
Note the location of cable straps (6) and remove. Set hose assemblies (5) to the left side of the machine. Remove tube assemblies (7) and the O-ring seals.
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Illustration 3 g03663171
Remove bolt (8), the nut, and the washers. Disconnect hose assembly (10). Set hose assemblies (9) to the side.
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Illustration 4 g03664619
Disconnect brackets (11). Loosen clamps (14) and (12). Position tube (13) to the right side of right transmission mount.
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Illustration 5 g03664930
Remove bolt (17), the nut, and the washers. Disconnect harness assembly (19). Remove bolts (21) and the washers. Position bracket assembly (18) with the transmission.
Position bracket (20) and reinstall bolts (21) and the washers. Tighten bolts (21) to a torque of 125 ± 20 N·m (92 ± 15 lb ft).
Remove clip (16) and cable strap (15).
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Illustration 6 g03664983
Remove bolt (22), the nut, and the washers. Remove bolt (24) and the retainer. Set tube assembly (23) to the front of the machine.
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Illustration 7 g03665011
Remove bolts (25).
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Illustration 8 g03665032

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Illustration 9 g03665057
Attach a suitable lifting device to main drive shaft (27). Remove bolts (26).
Lower main drive shaft (27) onto suitable cribbing (28) positioned on top of the front axle.
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Illustration 10 g03665488

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Illustration 11 g03665538
Disconnect transmission oil filter tube assemblies (29) from the transmission.
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Illustration 12 g03665549
Remove tube assemblies (30). Disconnect tube assembly (31).
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Illustration 13 g03665577
Remove hose assembly (32). Disconnect hose assembly (33).
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Illustration 14 g03665831

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Illustration 15 g03665818

Typical example
Use Tooling (A) to rotate the engine, transmission, and torque converter.
Note: Place identification marks on the plate and the housing for installation purposes.
Remove plug (34).
Remove bolts (35).
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Illustration 16 g03665772

Typical Example
Install Tooling (B) and Tooling (C). Install Tooling (D) and a suitable lifting device to support the engine.
The weight of the engine is approximately 1406 kg (3100 lb).
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Illustration 17 g03665614

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Illustration 18 g03665747
Attach Tooling (D) and a suitable lifting device to transmission (36). The weight of transmission (36) is approximately 590 kg (1300 lb). Remove transmission housing to engine bolts (37).
Remove bolt (38), the washers, and the mounts. Repeat for the opposite side.
Remove bolts (40). Remove left mount (39).
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Illustration 19 g03665783
Remove transmission (36).

Installation Procedure

Install transmission (36) in the reverse order of removal.
1. Apply Tooling (F) to the threads of bolts (35). Tighten bolts (35) to standard torque.
2. Tighten bolts (26) to a torque of 117 ± 10 N·m (86 ± 7 lb ft).
3. Tighten bolts (21) to a torque of 125 ± 20 N·m (92 ± 15 lb ft).