1997/03/31 Caterpillar

New Shaft Assembly Used In The Steering Gear Groups To Improve Service Life {4301,4300}

Usage:

776 (14H),
776B (6JC),
776C (2TK),
776D (5ER),
784D (5RK) Tractors;
771D (6JR),
775D (6KR) Quarry Trucks;
769C (01X),
769D (5TR),
773B (63W),
773D (7ER),
777 (84A),
777B (4YC),
777C (4XJ),
777D (3PR),
785 (8GB),
785B (6HK),
789 (9ZC),
789B (7EK),
793 (3SJ),
793B (1HL),
793C (4AR) Off-Highway Trucks

Description of Change: This article replaces the previous service magazine article published December 16, 1996; Page 8, New Shaft Assembly Used in the Steering Gear Groups to Improve Service Life.

A new shaft assembly is used in the steering gear group. The new shaft assembly will improve the service life of the steering gear group.

Adaptable To: The 135-5283 Shaft Assembly shown in Illustration 1 is a direct replacement for the former 8X-1225 Shaft Assembly effective with 776D (5ER76) and 784B (5RK23) Tractors, 771D (6JR90) and 775D (6KR95), Quarry Trucks, 769D (5TR239), 773D (7ER180), 777D (3PR79) and 785B (6HK590) Off-Highway Trucks. This change is adaptable to all earlier 776C (2TK1-Up), 776D (5ER1-75) Tractors, 771D (6JR1-89) Quarry Trucks, 769C (01X1-Up), 769D (5TR1-238), 773B (63W1-Up), 773D (7ER1-179), 775D (6KR1-94), 777C (4XJ1-Up), 777D (3PR1-78), 784B (5RK1-22), 785 (8GB1-Up) and 785B (6HK1-589) Off-Highway Trucks.

The 135-5386 Shaft Assembly is a direct replacement for 8X-1226 Shaft Assembly. This change is adaptable to all 776 (14H), 776B (6JC) Tractors; 769C (01X), 777 (84A), and 777B (4YC) Off-Highway Trucks. A typical view of 135-5386 Shaft Assembly is pictured in Illustration 2.

The 135-5284 Shaft Assembly is a direct replacement for 8X-1224 Shaft Assembly effective with 789B (7EK452), 793B (1HL490) and 793C (4AR79) Off-Highway Trucks. This change is adaptable to all 789 (9ZC1-Up), 789B (7EK1-451), 793 (3SJ1-Up), 793B (1HL1-489) and 793C (4AR1-78) Off-Highway Trucks. A typical view of 135-5284 Shaft Assembly is also pictured in Illustration 2.

NOTE: As shown in Illustration 3, installation of either shaft assembly (1) requires the new 135-5295 Tube (2) which directly replaces the former 8X-2010 Tube.

Steering gear group numbers and model usage are listed in Charts 1, 2 and 3 for each shaft assembly.

Illustration 1. View of 135-5386 Shaft Assembly.