SHIELD AS-EXHAUST 5051581 - Caterpillar

Checking the Wear on the Service Brake Discs
Introduction
It is necessary to check the service brake discs for wear in order to maintain the performance of the service brake.Required Tools
Use the following test equipment in order to check for wear on the service brake discs:
Table 1
Required Tools    
Tool    Part Number    Description    Qty    
A     242-0992     Brake Wear Gauge     1    Procedure for Checking the Wear
Personal injury or death can result from machine movement.Place blocks in front of and behind the wheels to make sure the machine does not move while the parking brakes are disengaged.
Park the machine on level ground and ensure that the parking brake is engaged.
Stop the engine. Prepare the machine for servicing. Refer to the Operation and Maintenance manual for your machine.
Place wheel blocks in front of the rear wheels and behind the rear wheels.
Use a tool (A) in order to measure the brake discs for minimum thickness.
Illustration 1 g00787712
Top view of the Front Axle
Remove oil filler plug (1) .
Compress and hold the brake pack by applying force to the service brake pedal.Note: Apply sufficient force to the pedal in order to ensure that the brake pack is fully compressed.
Illustration 2 g00787713
Measure the thickness of a brake disc (2) by inserting tool (A) through the oil filler plug hole (3) and between the plates of the compressed brake pack. Refer to Illustration .Refer to Table for the minimum allowable thickness (S) .
Table 2
Model     Minimum Allowable Thickness
(S)    
TH220B, TH330B, TH340B, TH350B, TH355B, and TH360B     4.0 mm (0.16 inch)    
TH460B, TH560B, and TH580B    
3.26 mm (0.128 inch)    
Disengage the brakes.
Reinstall the oil filler plug.
Repeat Steps through in order to check the thickness of the brake discs at the opposite side of the differential for the front axle.Note: Repeat this procedure as often as needed in order to maintain the correct thickness of the brake discs.
Remove the wheel blocks.
Prepare the machine for operation.