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What can you check that the spring brakes come on automatically?

1. Park the vehicle on a level surface.

2. Apply the parking brake.

3. Release the air from the air system by opening the drain cock on the air tank.

4. Wait 5 minutes.

5. If the spring brakes have come on, the wheels will be locked and the vehicle will be unable to move.

Note: Be sure to park the vehicle on a level surface so that the spring brakes can engage fully. If the vehicle is parked on a hill, the spring brakes may not come on properly and the vehicle could roll away.