2013/08/20 Caterpillar

New Optional Service Replacement Wheel Studs are Now Available {4201}

Usage:

793B 1HL

Off-Highway Truck/Tractor: 784B (S/N: 5RK1-UP) 784C (S/N: 2PZ1-UP) 785 (S/N: 8GB408-UP) 785B (S/N: 6HK1-UP) 785C (S/N: 1HW1-UP; APX1-UP; 5AZ1-UP) 789 (S/N: 9ZC382-UP) 789B (S/N: 7EK1-UP) 789C (S/N: 2BW1-UP) 793 (S/N: 3SJ1-UP) 793B (S/N: 1HL1-UP) 793C (S/N: 4AR1-UP; ATY1-UP; 4GZ1-UP) 793D (S/N: FDB1-UP) 793F (S/N: SND1-UP; SSP1-UP; SXP1-UP; RBT1-UP)

Service Magazine SEPD0588, 23 July 2001, "New Optional Service Replacement Wheel Studs are Now Available". Disregard this article. See the article that follows.

ReferenceSpecial Instruction, SEHS9575, "Procedure For Salvaging Off-Highway Truck Wheel Bolt/Stud Holes"

Optional service replacement studs for the wheels are available for the repair of the rear wheels and the front wheels.

The studs have a larger spline area. Drill the original hole to 28.575 mm (1.125 inch) for the new studs. The old procedure of welding the original hole, relocating the hole, and redrilling the hole is not required.

Note: Use the reference that is listed above to find the locations of the hole for each specific truck.

Table 1 shows the original stud, the original hole size, the optional service replacement stud, and the hole size that is needed for the replacement stud.

Note: Caterpillar does not recommend operating a truck with any broken studs, any missing studs, or any missing nuts.

Show/hide table

Table 1
Model	Part Number of Current Stud	Current Diameter of Hole	Part Number of Optional Service Replacement Stud	Hole Size for Optional Replacement Stud
784B (S/N: 5RK1-UP)	8X-2560	27.051 ± 0.102 mm (1.065 ± 0.004 inch)	185-6134	28.575 ± 0.102 mm (1.125 ± 0.004 inch)
784C (S/N: 2PZ1-UP)	8X-2561	27.051 ± 0.102 mm (1.065 ± 0.004 inch)	185-6135	28.575 ± 0.102 mm (1.125 ± 0.004 inch)
785 (S/N: 8GB408-UP)	8X-2560	27.051 ± 0.102 mm (1.065 ± 0.004 inch)	185-6134	28.575 ± 0.102 mm (1.125 ± 0.004 inch)
785B (S/N: 6HK1-UP) 785C (S/N: 1HW1-UP; APX1-UP) 785C HAA (S/N: 5AZ1-UP)	8X-2561	27.051 ± 0.102 mm (1.065 ± 0.004 inch)	185-6135	28.575 ± 0.102 mm (1.125 ± 0.004 inch)
789 (S/N: 9ZC382-UP) 789B (S/N: 7EK1-UP) 789C (S/N: 2BW1-UP)	8X-2560	27.051 ± 0.102 mm (1.065 ± 0.004 inch)	185-6134	28.575 ± 0.102 mm (1.125 ± 0.004 inch)
793 (S/N: 3SJ1-UP) 793B (S/N: 1HL1-UP) 793C (S/N: 4AR1-UP; 4GZ1-UP; ATY1-UP) 793D (S/N: FDB1-UP) 793F (S/N: SSP1-UP; RBT1-UP; SND1-UP; SXP1-UP)	8X-0274	27.051 ± 0.102 mm (1.065 ± 0.004 inch)	185-6133	28.575 ± 0.102 mm (1.125 ± 0.004 inch)