1997/05/27 Caterpillar

Special Installation Procedure For Alternator Support Brackets{1405}

Usage:

C-10 (2PN1095-Up),
C-12 (1YN1278-Up) Truck Engines

Description of Change: Improved alternator support brackets are used in the above truck engines. The improved brackets add support from the front housing to the block, providing additional rigidity to the front housing.

Adaptable To: The improved 133-7040 and 133-7042 Brackets are direct replacements for the former 123-0763 Tensioner Support and 122-0770 Bracket, effective with the above truck engines.

Installation

Views of the 136-4280 Alternator Mounting Group. (1) 133-7042 Bracket. (2) 133-7040 Bracket. (3) 8T-0643 Bolt. (4) 3E-4353 Hard Washer. (5) 6V-1820 Bolt. (6) 9H-8260 Bolt. (7) 1F-7958 Nut. (8) 5P-8245 Washer. (9) 8T-0643 Bolt. (10) 6V-1820 Bolt.

1. Attach the 133-7042 Bracket (1) to the block at three bosses by snugging three 6V-1820 Bolts (5) and three 3E-4353 Hard washers (4) finger tight.

2. Attach the 133-7040 Bracket (2) to the front housing by using two 8T-0643 Bolts (9) and two 6V-1820 Bolts (10). Torque the bolts to 55 ± 10 N·m (41 ± 7 lb ft).

3. Attach the 133-7042 Bracket (1) to the 133-7040 Bracket (2) by using two 8T-0643 Bolts (3) and two 3E-4353 Hard Washers (4). Torque to 55 ± 10 N.m (41 ± 7 lb ft).

4. Loosen the three 6V-1820 Bolts (5) at the block to relieve the stress in the front housing. Torque to 55 ± 10 N.m (41 ± 7 lb ft).

NOTE: When installing the alternator, use a 9H-8260 Bolt (6), 5P-8245 Washer (8) and 1F-7958 Nut (7). Torque to 105 ± 20 N.m (75 ± 15 lb ft)

Caterpillar Information System:

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