Usage:
772B (64W),
776C (2TK) Tractors;
773B (63W),
777C (4XJ) Trucks;
775B (7XJ) Quarry Trucks
Description of Change: A new Duo-Cone seal retainer and a new backing plate are being used in the rear service and parking brake groups to reduce oil leaks. Oil leaks were possible with the former Duo-Cone seal retainer.
Adaptable To: The new 130-5406 Seal Retainer is a direct replacement for the former 7D-2889 and 124-4123 Seal Retainers which are canceled. The 124-4123 Seal Retainers were canceled due to interference with the Duo-Cone seal and should not be used. The new 130-5406 Seal Retainer and 130-7910 Plate (backing plate) are effective with 772B (64W304) and 776C (2TK90) Tractors; 773B (63W4564) and 777C (4XJ814) Trucks and 775B (7XJ299) Quarry Truck.() The 130-7910 Plate is a direct replacement for the 5T-6380 Plate which is canceled. The 130-7910 Plate, when used in conjunction with the 130-5406 Retainer, will provide adequate Duo-Cone seal clearance and increased face load to prevent oil leaks.
NOTE: The 130-5406 Seal Retainer and 130-7910 Plate must be used together to avoid interference and damage to the Duo-Cone seal. The former 5T-6380 Plate can be reused with the new retainer if it is modified as shown in the illustrations.
Illustration 1. Location of the area on the 5T-6380 Backing to be modified.
Illustration 2. Detail A. Dimension (A) 2.78 ± 0.25 mm (.109 ± .010 in). (B) 0.5 ± 0.2 mm (.02 ± .01 in) x 45°.