Usage:
785B (6HK),
789B (7EK),
793B (1HL) Off-Highway Trucks
Description of Change: New center support bracket transition castings are used in new center support assemblies. The new center support assemblies are used in some off-highway truck frame assemblies. The new center support bracket transition castings have larger flanges and are designed to reposition the frame assembly front weld joint between the main rail and center support assembly. The larger flange and repositioned weld will increase weld joint service life.
Adaptable To: Center support bracket transition castings and center support assemblies used in the following frame assemblies have been canceled and replaced with new castings and assemblies as described above. These changes are effective with:
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- * 7I-5537 Frame Assemblies (not serviced) used in 785B (6HK621-Up) Off-Highway Trucks.
- * 7I-5538 Frame Assemblies (not serviced) used in 789B (7EK553-Up) Off-Highway Trucks.
- * 7I-5483 Frame Assemblies (not serviced) used in 793B (1HL404-Up) Off-Highway Trucks.
- * 7I-5537 Frame Assemblies (not serviced) used in 785B (6HK621-Up) Off-Highway Trucks.
The center support bracket transition castings and center support assemblies are not available as serviceable parts. The changes described above are only adaptable through replacement of the truck frame assembly.
View of new center support assembly bracket transition castings.