BRACKET 8X0750 - Caterpillar

Illustration 2 g06142116
New wheel brake assembly
(2) Guide
(3) Plates
(4) Brake discs
(5) Service brake piston
(6) Parking brake piston
(7) Spring
Check the position of guide (2) in the brake inspection port. If the head of guide (2) is positioned towards the differential side of the inspection port, wheel brake disc wear is within tolerance. Illustration 2 shows the position of guide (2) for a new brake assembly.
Illustration 3 g06142123
Guide at 20% wear
(2) Guide
Illustration 4 g06142125
Guide at 40% wear
(2) Guide
Illustration 5 g06336569
Guide at 60% wear
(2) Guide
Illustration 6 g06142126
Guide at 80% wear
(2) Guide
Refer to Illustration 3 for an indication of 20% wear. Refer to Illustration 4 for an indication of 40% wear. Refer to Illustration 5 for an indication of 60% wear. Refer to Illustration 6 for an indication of 80% wear.
Illustration 7 g06142139
Worn wheel brake assembly
(2) Guide
(3) Plates
(4) Brake discs
(5) Service brake piston
(6) Parking brake piston
(7) Spring
If the head of the guide (2) is positioned in the center or towards the wheel side of the inspection port, replace the brake discs. Illustration 7 shows the position of guide (2) for a worn wheel brake assembly.
Install plug (1) in the brake inspection port.
Repeat Steps 4 through 8 for the remaining wheel brake assemblies on the machine.Procedure with Brake Group Disassembled
If the wheel brake groups have been disassembled, use the following information to calculate the wear on the brake discs. The information will determine whether the discs require replacement.
Illustration 8 g06142598
Wheel brake assembly
(C) Thickness of a disc
(3) Plates
(4) Brake discs
(5) Service brake piston
(6) Parking brake piston
Check each brake disc (4) in each wheel brake assembly. The thickness (C) of a new disc is 7.10 0.13 mm (0.280 0.005 inch). The minimum thickness of a worn disc should not exceed 6.06 mm (0.239 inch). Service the brake before discs (4) reach the minimum thickness.Note: Groove depth is the most critical dimension. If the depth of the grooves on the brake discs is too shallow, oil flow to the wheel brakes will be inadequate.
Illustration 9 g01254450
Measuring the depth of the grooves on the wheel brake discs
Check the groove depth on both sides of the brake disc. Use a depth gauge for this procedure. Check all brake discs in each wheel brake assembly.
The depth of the oil grooves must be greater than 0.53 mm (0.021 inch).
Table 1
Disc Thickness Wear Chart
Estimated Percentage of Remaining Brake Disc Life Brake Disc Thickness Oil Groove Depth(1)
100 7.10 mm (0.280 inch) 1.05 mm (0.041 inch)
80 6.89 mm (0.271 inch) 0.95 mm (0.037 inch)
60 6.68 mm (0.263 inch) 0.84 mm (0.033 inch)
40 6.48 mm (0.255 inch) 0.74 mm (0.029 inch)
20 6.27 mm (0.247 inch) 0.63 mm (0.025 inch)
0 6.06 mm (0.239 inch) 0.53 mm (0.021 inch)
(1) Groove depth is the most critical measurementSteel Plates
Check the plates for thickness, for scored surfaces, for radial grooves, and for warpage. Replace the plates if any of the following conditions exist:
The plate thickness is less than 6.0 mm (0.236 inch)
More than 10 percent of the surface area is scored
The plate has deep radial