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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. |
This procedure requires two people. One person must engage the service brakes and the other person must measure the disc wear. Care must be taken when you perform this procedure. Oil leakage from the brake system will occur. Keep all other personnel away from the machine or in sight of the operator.
- Park the machine on a level surface away from other equipment and other personnel and lower the implement to the ground. Place the transmission in NEUTRAL. Engage the parking brake and turn off the engine.
- Install the steering lock and chock the wheels.
- Start the engine to build brake system pressure.
- Stop the engine. Allow the axle oil to settle before proceeding to the next step.
Note: Keep the engine off when the brake wear is measured.
- Push the button on the top of each axle breaker relief valve to relieve any pressure.
Note: Refer to Operation and Maintenance Manual, "Axle Breaker Relief Valve - Clean" for the axle breaker relief valve locations.
- Place a suitable container below the plug to collect oil leakage from the brake system.
- Press and hold the service brake pedal.
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Illustration 1 g01446483 - Remove the plug.
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NOTICE Do not allow the brake piston to retract while the pin is installed in the plug hole. This could cause the pin to break off when the brake piston retracts. It is possible for broken pieces of the tool to fall into the brake housing and cause damage.
- Insert an FT3105 Brake Wear gauge into the inspection hole.
If the brake wear gauge does not drop all the way into the inspection hole, the brake wear is less than 50%. Proceed to step 12.
If the brake wear gauge drops all the way into the inspection hole, the brake wear is greater than 50%. Proceed to step 10.
- Insert an FT3104 Brake Wear gauge into the inspection hole.
If the brake wear gauge does not drop all the way into the inspection hole, the brake wear is between 50% and 75%. Proceed to step 12.
If the brake wear gauge drops all the way into the inspection hole, the brake wear is greater than 75%. Proceed to step 11.
- Insert an FT3103 Brake Wear gauge into the inspection hole.
If the brake wear gauge does not drop all the way into the inspection hole, the brake wear is between 75% and 100%. Brake service should be scheduled soon.
If the brake wear gauge drops all the way into the inspection hole, the brake wear is greater than 100%. Brake service should be scheduled immediately.
- Remove the brake wear gauge.
- Release the service brake pedal.
- Install the plug.
- Clean up spilled oil.
- Repeat Steps 1 through 15 for each service brake.
