BRACKET GP-MTG 4732027 - Caterpillar

Parking/Secondary Brake (Earlier Machines)
To release the parking/secondary brake on earlier machines, move the lever to the release position. Allow three seconds time for the brake to release. 1. Measure the distance from the rotochamber to the slack adjuster clevis retaining pin. 2. Apply the service brake and measure the amount of travel of the rod. If the travel is 75 mm (3 inches) or more, adjust the brake.3. Measure the brake rotochamber rod travel of all four wheel brakes. Adjust the travel as necessary. Scraper rotochambers are located inside the push frame.To Test Brakes (Earlier Machines)
Be sure the area around the machine is clear of personnel and obstructions.Fasten the seat belt before operating the machine.Test the brakes on a dry, level surface.
The machine must be on a dry, level surface, the bowl lowered, and the parking brake applied.The following tests are to determine if the service brake or parking/secondary brake is 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 or parking/secondary brake applied, 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 the air pressure reaches 700 kPa (100 psi) or the green range on the gauge, apply the service brake and move the parking/secondary brake lever to RELEASE. Raise the bowl. If the parking brake does not release, follow steps 3 thru 9. If the parking brake released, proceed to step 6.3. Move parking/secondary brake lever to EMERGENCY. Push the air governor override button and hold until air pressure in the reservoirs increases to 1050 kPa (150 psi). Release the button and move the parking/secondary brake lever to RELEASE.4. Move the parking/secondary brake lever from SECONDARY to RELEASE position at least three times to lower air pressure in the system.5. With parking/secondary brake lever in the RELEASE position, allow the air pressure to again reach 700 kPa (100 psi) or the green range on the gauge.6. Move the transmission control to second speed.7. With the service brakes applied, gradually increase engine rpm. The service brakes should prevent machine movement at 1500 100 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 100 rpm or higher. Record the actual engine rpm obtained during the test and use this for future comparisons. If the rpm obtained is lower than 1400 rpm, consult your Caterpillar dealer for inspection and repair.8. Reduce the engine rpm, shift to neutral, lower the bowl and stop the engine.9. Move the parking/secondary brake lever to PARK and release the