770 and 772 Off-Highway Trucks Power Train Transfer Gears - Assemble Caterpillar

Assembly Procedure

1. Check all of the O-ring seals and the components for wear or damage. Replace the components, if necessary.

2. Lubricate all of the O-ring seals lightly with the lubricant that is being sealed.
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   Illustration 1	g00575648

3. Lower the temperature of bearing cup (18). Install bearing cup (18) into the transfer gear case.
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   Illustration 2	g00575858

4. Raise the temperature of bearing cones (17). Install bearing cones (17) onto transfer gear (16).

5. Position transfer gear (16) into the transfer gear case.
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   Illustration 3	g00575510

6. Lower the temperature of bearing cup (14). Install bearing cup (14) into bearing cage (13).
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   Illustration 4	g01409019

7. Install the original shims (15) and bearing cage (13) to the transfer gear case. Install the bolts and the washers that hold bearing cage (13) to the transfer gear case. Tighten the bolts to a torque of 50 ± 10 N·m (37 ± 7 lb ft).

8. Use Tooling (D) to measure the end play of bearing cone (17). Add or subtract shims between bearing cage (13) and the transfer gear case in order to achieve an end play measurement of 0.15 ± 0.05 mm (0.006 ± 0.002 inch).
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   Illustration 5	g00575503

9. Position tube assembly (10) to the transfer gear case and connect tube assembly (10).

10. Install bolt (11) that holds tube assembly (10) to the transfer gear case. Bend clip (12) against the head of bolt (11).
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    Illustration 6	g00575871

11. Raise the temperature of bearing cones (9). Install two roller bearing cones (9) onto transfer gear (8).
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    Illustration 7	g00575498

12. Install transfer gear (8) to the transfer gear case.
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    Illustration 8	g01409027

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    Illustration 9	g00575496

13. Apply Tooling (E) to the seal bore in the transfer gear case and allow the tooling to dry.

    Note: Do not apply Tooling (E) to the lip seal.

14. Use Tooling (B) to install lip seal (6) to bearing cage (3). Lubricate the sealing lip of the lip seal lightly with the lubricant that is being sealed.

15. Lower the temperature of bearing cup (5). Install bearing cup (5) to bearing cage (3).

16. Install O-ring seal (7) to bearing cage (3).
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    Illustration 10	g00575894

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    Illustration 11	g00575403

17. Lubricate the bore of the transfer gear case lightly with the lubricant that is being sealed. Install the original shims and bearing cage (3) to the transfer gear case. Install bolts (1), the washer, and the spacers that hold bearing cage (3) to the transfer gear case. Tighten bolts (1) to a torque of 50 ± 10 N·m (37 ± 7 lb ft).

18. Use Tooling (A) to measure the end play of bearing cone (9). Add or subtract shims between bearing cage (3) and the transfer gear case in order to achieve an end play measurement of 0.15 ± 0.05 mm (0.006 ± 0.002 inch).

19. Install yoke (2) to the transfer gear.

End By:

1. Connect the transmission planetary and the transfer gears. Refer to Disassembly and Assembly, "Transmission Planetary and Transfer Gears - Connect".