- Fasten the seat belt before you test the brakes.
- Park the machine on a dry, level surface.
- Check the area around the machine. Make sure that the machine is clear of personnel and clear of obstacles.
- Make sure that the steering frame lock is in the unlocked position.
The following tests are used to determine whether the braking system is functional. These tests are not intended to measure the maximum brake holding effort. The required brake holding effort for sustaining a machine at a specific engine rpm varies from one machine to another machine. The variations include differences in the engine setting, the power train efficiency, the brake holding ability, and others.
Service Brake Holding Ability Test
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Personal injury can result if the machine moves while testing. If the machine begins to move during test, reduce the engine speed immediately and engage the parking brake. |
- Start the engine. Raise the implement slightly. Apply the service brake. Release the parking brake.
- Make sure the Auto/Manual Transmission Select is in the MANUAL mode. Put the transmission control in high speed while the service brakes are applied.
- Gradually increase the engine speed to high idle. The machine should not move.
- Reduce the engine speed to low idle. Move the transmission direction control to the NEUTRAL position. Engage the parking brake. Lower the implement to the ground. Stop the engine.
If the machine moved during the test, consult your Cat dealer for a brake inspection. Make any necessary repairs before the machine is returned to operation.
Parking Brake Holding Ability Test
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Personal injury can result if the machine moves while testing. If the machine begins to move, reduce the engine speed immediately and apply the service brake pedal. |
This test is performed when the parking brake is engaged. If the machine begins to move, compare the engine rpm to the engine rpm of a prior test. This difference will indicate the amount of system deterioration.
- Start the engine. Raise the implement slightly. Engage the parking brake.
- Ensure that the transmission control is in the MANUAL position.
- Move the transmission control to high speed.
The parking brake indicator light should come on.
- Gradually increase the engine speed to high idle. The machine should not move.
- Reduce the engine speed to low idle. Move the transmission direction control to the NEUTRAL position. Lower the implement to the ground. Stop the engine.
If the machine moved during the test, consult your Cat dealer for a brake inspection. Make any necessary repairs before the machine is returned to operation.