SHAFT 4D2246 - Caterpillar

Personal injury or death can result if two persons are not used in the following procedure.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.Dispose of all fluids according to local regulations and mandates.
Specification
Table 1
Disc Thickness Wear Chart
Estimated Percentage of Remaining Brake Disc Life Remaining Thickness of Disc Oil Groove Depth(1)
100 7.10 mm (0.28 inch) 1.05 mm (0.041 inch)
80 6.80 mm (0.268 inch) 0.90 mm (0.035 inch)
60 6.52 mm (0.257 inch) 0.76 mm (0.030 inch)
40 6.22 mm (0.245 inch) 0.61 mm (0.024 inch)
20 5.94 mm (0.234 inch) 0.47 mm (0.018 inch)
0 5.64 mm (0.222 inch) 0.32 mm (0.013 inch)
(1) Groove depth is the most critical measurement.Introduction
The following information outlines the procedure needed to check the service brake discs.
Illustration 1 g03409100
Components of the Service Brakes
(A) Thickness of a new disc
(1) Piston
(2) Disc
(3) Plate The thickness of a new disc (2) is 7.10 mm (0.28 inch).The minimum thickness of a worn disc (1) is 5.64 mm (0.222 inch).Service the brake before disc (2) reaches the minimum thickness.Note: Check each service brake disc in each service brake. Brake service life can vary greatly because of the different applications. The following conditions can lead to premature brake failure:
Check for oil leaks at the yoke and the drive axles. A leak can also allow contamination from water and debris to occur. Water and debris can enter the axle through the lip seal at the drive yoke. The water and debris can mix with the oil. This water and debris can lead to premature brake failure.
The axle housing breather may be plugged or damaged. Check the axle housing breather for proper operation.
Excessive heat can be generated if the service brakes are used as a retarder. Excessive heat can be generated if the service brakes are used as a device to maintain a slower ground speed. This type of operation should be avoided by using a lower transmission gear speed. The buildup