Caterpillar — Rear Seal - Remove" and Disassembly and Assembly, "Crankshaft Rear Seal - Install".

A Caterpillar service procedure — check it applies to your exact model before use.

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Procedure

1. 2. Use tool (A) and the lifting device to align the flywheel housing (2) to the dowels (5). Install
2. the flywheel housing to the engine.
3. 3. Install the setscrews (1) that fasten the flywheel housing to the cylinder block.
4. For C0.5 and C0.7 engines, tighten the setscrews to a torque of 15 N·m (11 lb ft).
5. For C1.1/3011C and C1.6 engines, tighten the setscrews to a torque of 50 N·m (37 lb ft).
6. For C1.5/3013C engines, tighten the setscrews to a torque of 25 N·m (19 lb ft).
7. 4. Remove tool (A) and the lifting device from the flywheel housing.
8. End By:
9. a. Install the flywheel. Refer to Disassembly and Assembly, "Flywheel - Install".

Source: manual:216-Skid-Steer-Loader-Service-Manual-4NZ03400.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.