3508, 3512 and 3516 Generator Set Engines Caterpillar

Removal Procedure

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Illustration 1	g02056453

1. Disconnect the harness assembly from service meter (3). Remove bolts (4) and service meter (3).

2. Disconnect the harness assembly from tachometer drive (1). Remove bolts (2) and tachometer drive (1).

3. Remove the O-ring seal from tachometer drive (1).
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   Illustration 2	g02056454

4. Remove bolts (5), cover assembly (6), and the gasket. Remove the shaft from cover assembly (6).
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   Illustration 3	g02056514

5. Remove lip seal (8) from cover assembly (6). If necessary, remove bearing (7) and the dowels from cover assembly (6).
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   Illustration 4	g02056515

6. Remove bolt (10) and adapter (9).

Installation Procedure

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

   1. Tighten bolt (10) to a torque of 360 ± 40 N·m (270 ± 30 lb ft). Tap the adapter with a hammer. Tighten bolt (10) again to a torque of 360 ± 40 N·m (270 ± 30 lb ft). Repeat this procedure until the torque does not change.

   2. Use Tooling (A) to install lip seal (8) and bearing (7), if necessary.

   3. Apply clean engine oil to the O-ring seal prior to installation.