BOOM AR-VARIABLE ADJUSTABLE 3905096 - Caterpillar

Personal injury can result if the machine moves during testing. If the machine begins to move during testing, reduce the engine speed immediately and place the transmission control in the PARK position in order to engage the parking brake.
Note: These tests should be conducted when the truck is empty.The following tests are used to determine if the service brake system and the secondary brake system are functional. These tests are not intended to measure the maximum brake holding effort. The brake holding effort that is required to sustain a machine at a specific engine rpm varies depending on the machine. The variations are the differences in the engine setting, in the power train efficiency, and in the brake holding ability, etc.During the test of the brakes, compare the previous engine rpm and the recent engine rpm. This will determine the system deterioration.
Illustration 1 g02334541Service Brake Holding Ability Test
Fasten the seat belt before you test the brakes.
Check the area around the machine. Make sure that the machine is clear of personnel and clear of obstacles.
Test the brakes on a dry, level surface.
Start the engine.
Depress service brake control (1) in order to apply the service brakes.
Move the transmission control to the D position.
Gradually increase the engine speed to 1200 rpm. The machine should not move.
Reduce the engine speed to low idle. Move the transmission control to the P (Parking Brake Applied) position. Stop the engine.
If the machine moved while testing the brakes, contact