PL72 Pipelayers Power Train Caterpillar

Removal Procedure

Start By:

1. Separate the track.

Note: The planetary carriers of the final drives can be removed directly from the machine. Refer to Disassembly and Assembly, "Final Drive Planetary Carrier (In Chassis) - Remove".

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Without the sun gear in place, the brakes are ineffective. Personal injury or death could result. Provide other means to hold or stop the machine.

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Illustration 1	g00865052

1. Remove bolts (2) and cover (3) from final drive (1).
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   Illustration 2	g00865024

2. Use Tooling (A) in order to remove axle (4).
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   Illustration 3	g00865075

3. Remove two bolts (5).
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   Illustration 4	g03863228

4. Adjust the top bracket of Tooling (B).
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   Illustration 5	g00865077

5. Remove two bolts (6) and the nuts from the sprocket segment. Discard bolts (6) and the nuts.
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   Illustration 6	g03863234

6. Fasten Tooling (B) and a suitable lifting device to the final drive (1).
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   Illustration 7	g00865094

7. Remove bolts (7) that hold the final drive and the brake together.

8. Use Tooling (B) to remove final drive (1) from the machine. The weight of final drive (1) is approximately 454 kg (1000 lb).

Installation Procedure

1. Install final drive (1) in the reverse order of removal.

   1. Tighten bolts (7) to a torque of 700 ± 90 N·m (516 ± 66 lb ft).

   2. Lubricate new bolts (6) with SAE 30 oil. Install new bolts (6) and the nuts. Tighten bolts (6) to a torque of 175 ± 40 N·m (130 ± 30 lb ft). Tighten bolts (6) an additional 1/3 turn.