777G Off-Highway Truck Power Train Caterpillar

Installation Procedure

Note: Check all the components for wear or for damage. Replace the components, if necessary. Clean all the components with a cloth that is free of loose material (lint).

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Illustration 1	g06295291

1. Install O-ring seal (18).
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   Illustration 2	g06295254

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   Illustration 3	g06127805
   Typical Example

   Note: If the transmission is not equipped with a rear lifting eye, then attach Tooling (D) at locations (X).

2. Attach Tool (A) to the transmission. Secure Tool (A) to the hoist. Position the transmission, transfer gears, and differential onto the axle housing assembly, as shown. The weight of the transmission, transfer gears, and differential is 2223 kg (4900 lb).
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   Illustration 4	g06295261

3. Install two full nuts (13) and the washers that hold the differential and bevel gear to the rear axle housing. Tighten full nuts (13) to a torque of 430 ± 60 N·m (317 ± 44 lb ft).

4. Install 26 full nuts (12) and the washers that hold the transmission in position. Tighten full nuts (12) to a torque of 430 ± 60 N·m (317 ± 44 lb ft).

5. Remove Tooling (B) from location (X). Location (X) occurs six times around the circumference of the transmission.
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   Illustration 5	g01310782

6. Connect hose assembly (10).
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   Illustration 6	g01310778

7. Connect harness assembly (9).
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   Illustration 7	g01310776

8. Attach a suitable lifting device onto drive shaft (5). The weight of drive shaft (5) is approximately 91 kg (200 lb).

9. Position bearing and spider assembly (7). Install new bolts (8). Tighten new bolts (8) to a torque of 319 ± 7 N·m (235 ± 5 lb ft). Extend drive shaft (5). Install new bolts (6). Tighten new bolts (6) to a torque of 270 ± 15 N·m (199 ± 11 lb ft).
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   Illustration 8	g01310774

10. Install guard assembly (3). Install bolts (2). Install cable straps (4).
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    Illustration 9	g01310773

11. Connect hose assembly (1).

12. Fill the oil in the transmission oil tank. Refer to Operation and Maintenance Manual, "Transmission Oil Tank - Change".
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    Illustration 10	g06295290

    Note: Refer to Power Train, Testing and Adjusting, "Differential and Bevel Gear - Adjust" for the correct procedure to adjust pin (16).

13. Install O-ring seal (17) on pin (16). Install pin (16) in the axle housing assembly.
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    Illustration 11	g06295262

14. Install the shim pack, cover (15), two bolts (14), and the washers.

15. Fill the axle housing assembly with oil.

End By:

1. Install the lubrication pump assembly.