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. |
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| NOTICE |
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If the machine moved while testing the brakes, contact your AVSpare Dealer. Have the dealer inspect and, if necessary, repair the service brakes before returning the machine to operation. |
Make sure that the area around the machine is clear of personnel and of obstacles.
Test the brakes on a dry, level surface.
Fasten the seat belt before you test the brakes.
The service brake holding ability test determines whether the service brake is functional. This test is not intended to measure the maximum brake holding effort. The brake holding effort that is required to hold a machine at a specific engine rpm will be different for various machines. This is due to variances in the engine setting, in the power train efficiency, and in the brake holding ability.
When the machine begins to move, the engine rpm should be compared to a prior test. Use the comparison as an indication of system deterioration.
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| Illustration 1 | g00881495 |
- Start the engine and look at the air pressure gauge. Allow the brake system air pressure to reach 850 ± 50 kPa (125 ± 10 psi).
- Raise the bowl slightly.
- Apply the service brake and release the parking brake.
- While the service brake is applied, move the transmission direction and speed control to second speed.
- Gradually increase the engine rpm. The service brake should prevent machine movement when the engine is running at 1500 ± 100 rpm.
The engine rpm should be 1500 ± 100 rpm or more. Record the actual engine rpm that is achieved during the test for future comparisons.
If the engine rpm is less than 1400 rpm, consult your AVSpare Dealer for an inspection of the machine and for repairs for the machine.
- Reduce the engine speed to low idle and move the transmission direction and speed control to the NEUTRAL position. Engage the parking brake. Lower the bowl to the ground and stop the engine.
Note: If the friction material for the brakes needs to be replaced, the new friction material may require burnishing for maximum performance. Consult your AVSpare dealer for the procedure for burnishing.
Parking And Secondary Brake Holding Ability Test
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If the machine begins to move, reduce the engine speed immediately and engage the parking brake. |
|
| NOTICE |
|---|
If the machine moved while testing the brakes, contact your AVSpare Dealer. Have the dealer inspect and, if necessary, repair the service brakes before returning the machine to operation. |
Make sure that no people or obstacles are in the area around the machine.
Test the brakes on a dry, level surface.
Fasten the seat belt before you test the brakes.
The parking brake and the secondary brake holding ability test determines whether the parking brake is functional. This test is not intended to measure the maximum brake holding effort. The brake holding effort that is required to hold a machine at a specific engine rpm will be different for various machines. This is due to variances in the engine setting, in the power train efficiency, and in the brake holding ability.
When the machine begins to move, the engine rpm should be compared to a prior test. Use the comparison as an indication of system deterioration.
| | |
| Illustration 2 | g00881495 |
- Start the engine and look at the air pressure gauge. Allow the brake system air pressure to reach 850 ± 50 kPa (125 ± 10 psi).
- Raise the bowl slightly.
- While the parking brake is applied, move the transmission direction and speed control to second speed.
 | |
| Illustration 3 | g00880095 |
- Gradually increase the engine speed to high idle. The machine should not move when the engine rpm is at 1000 ± 100 rpm.
The engine rpm should be 1000 ± 100 rpm or more. Record the actual engine rpm that is achieved during the test for future comparisons.
If the engine rpm is less than 900 rpm, consult your AVSpare Dealer for an inspection of the machine and for repairs of the machine.
 | |
| Illustration 4 | g00879920 |
- Reduce the engine speed and move the transmission direction and speed control to the NEUTRAL position. Lower the bowl to the ground and stop the engine.
Note: If the friction material for the brakes needs to be replaced, the new friction material may require burnishing for maximum performance. Consult your AVSpare Dealer or see Special Instruction, SEHS9580 for the procedure for burnishing.