C3.3 Industrial Engine Caterpillar

Removal Procedure

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Illustration 1	g01212859

1. Remove allen head bolt (1) from accessory drive housing (8). Remove allen head bolts (6) from accessory drive housing (8).

2. Remove accessory drive housing (8) from the front housing.

3. If necessary, follow Steps 3.a through 3.c in order to disassemble the accessory drive.

   1. Remove retaining ring (2) from accessory drive housing (8).

   2. Place accessory drive housing (8) onto a suitable support. Press the assembly of gear (4) and bearings (3) and (5) out of accessory drive housing (8). Use a suitable puller in order to remove bearings (3) and (5) from gear (4).

   3. Remove O-ring seal (7) from accessory drive housing (8).

Installation Procedure

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Illustration 2	g01193304

1. If necessary, follow Steps 1.a through 1.e in order to assemble the accessory drive.

   1. Inspect the condition of the teeth and the splines of gear (4) for wear or damage. Inspect bearings (3) and (5), retaining ring (2), and the front housing for wear or damage. Replace any components that are worn or damaged.

   2. Apply a small continuous bead of Tooling (A) to the inner surface (X) of bearing (5). Place the gear shaft on a suitable support. Press on the inner race of bearing (5) until bearing (5) is against the shoulder of gear (4). Remove any excess sealant.

   3. Apply a small continuous bead of Tooling (A) to inner surface (Z) of bearing (3). Place the front face of the inner race of bearing (3) onto a suitable support. Press the shaft of gear (4) into bearing (3) until the shoulder of the gear is against the bearing. Remove any excess sealant.

   4. Apply a small continuous bead of Tooling (A) to the outer surface (Y) of bearing (5). Place accessory drive housing (8) on a suitable support. Press the assembly of gear (4) and bearings (3) and (5) into accessory drive housing (8). Ensure that bearing (5) is against the front face of the recess in accessory drive housing (8). Remove any excess sealant.

   5. Install retaining ring (2) into the groove in accessory drive housing (8). Ensure that retaining ring (2) is correctly positioned in the groove.

2. Lightly lubricate a new O-ring seal (7) with Tooling (B) and install O-ring seal (7) into the groove in accessory drive housing (8).

3. Inspect the bore in the front housing (not shown) for damage. If necessary, replace the front housing. Refer to Disassembly and Assembly, "Housing (Front) - Remove" and Disassembly and Assembly, "Housing (Front) - Install".

4. Lightly lubricate bearing (3), bearing (5), and gear (4) with clean engine lubricating oil. Install the assembly of the accessory drive to the front housing.

5. Apply Tooling (C) to allen head bolts (1) and (6). Install allen head bolts (6) to accessory drive housing (8). Install allen head bolt (1) to accessory drive housing (8).

6. Tighten bolts (1) and (6) to a torque of 22 N·m (16 lb ft).

7. Ensure that there is backlash between the idler gear and the accessory drive gear.