CLAMP 3G5591 - Caterpillar

Check the Air System for Leaks
1. Start the engine and allow air pressure to reach 792 to 896 kPa (115 to 130 psi). 2. Apply the service brakes and hold them in the applied condition.3. Stop the engine.4. With the brakes applied, watch the air pressure gauge.5. The pressure should drop no more than 35 kPa (5 psi) in 10 minutes.6. If the air pressure loss is greater than 35 kPa (5 psi), inspect the air lines and connections. Make any necessary repairs.Test Brakes
The machine must be on a dry, level surface, the bowl lowered and the parking brake engaged.The following tests are to determine if the service brake, parking brake and secondary brake are functional. These tests are not intended to measure maximum brake holding effort. Brake holding effort required to hold a machine at a specific engine rpm will vary from machine to machine due to differences in engine setting, power train efficiency, etc., as well as differences in brake holding ability.Engine rpm at beginning of machine movement, with service, parking or secondary brake engaged, should be compared against the engine rpm your specific machine was able to hold on a prior test, as an indication of system deterioration.Service Brake
1. Start the engine. Allow the engine to reach the normal operating temperature.2. When air pressure registers 792 to 896 kPa (115 to 130 psi) apply the service brakes. Raise the bowl. 3. Depress the knobs to release the parking and secondary brake. Be sure the buttons stay in. 4. Move the transmission control to third speed.5. With the service brake applied, gradually increase engine rpm. The service brakes should prevent machine movement at 1500 50 engine rpm.
When the machine moves during the test, reduce the engine speed immediately, and apply the parking brake.
The expected engine rpm should be 1500 50 rpm or higher. Record the actual engine rpm obtained during the test and use this for future comparison. If rpm obtained is lower than 1400 rpm, consult your Caterpillar dealer for inspection and repair.6. Reduce the engine rpm, shift to NEUTRAL, lower the bowl and stop the engine.Secondary Brake
1. Start the engine. Allow the engine to reach the normal operating temperature. 2. When air pressure registers 792 to 896 kPa (115 to 130 psi) apply the service brakes. Raise the bowl. 3. Pull the knob out to apply the secondary brake.4. Move the transmission control to third speed.5. Release the service brake.6. With the secondary brake applied, gradually increase the engine rpm. The secondary brake should prevent machine movement at 1600 50 engine rpm.The expected engine rpm should be 1600 50 rpm or higher. Record the actual engine rpm obtained during the test and use this for future comparison. If rpm obtained is lower than 1400 rpm, consult your Caterpillar dealer for inspection and repair.7. Reduce engine rpm, shift to NEUTRAL, lower the bowl and stop the engine.If the machine moved at a much lower engine rpm than specified or previously obtained