Usage:
D11N, 776B Tractors;
777B, 785, 789 Trucks;
3500 Family Of Engines
Description of Change: A new connecting rod bearing is used in the piston and rod groups. The new bearing is made from a material that will provide higher fatigue properties than the former bearing. The new connecting rod bearing will provide increased service life.
Adaptable To: The new 7E7997 Connecting Rod Bearing is a direct replacement for the former 1W7538 Connecting Rod Bearing in the 7E1038, 8N6224, 7W1988, and 7W5461 Piston And Rod Groups. The former connecting rod bearing is canceled. The new 7E7997 Connecting Rod Bearing is in effect as shown in Chart A.
New parts service connecting rod bearings with higher fatigue properties are also available. The former parts service bearings are canceled. Chart B lists the new and former parts service connecting rod bearings.