HOUSING-FLYWHEEL 2339770 - Caterpillar

Service Brake Check
Note: The service brake air control valve activates the front brakes and the rear brakes.
Start the engine and allow the air system to build up to the operating pressure.
Move the parking brake control to the OFF position. Do not depress the secondary brake control.
Move the transmission control to the NEUTRAL position.
Depress the service brake control fully.
Move the transmission control to the FIRST GEAR position.
Increase engine speed to 1300 rpm. The machine should not move.
If the machine moves, inspect the brake system for wear or for damage. Correct the air pressure. See the Systems Operation/Testing And Adjusting, "Braking System Troubleshooting".Parking Brake Check
Note: The air control valve for the parking brake activates all the wheel brakes. The wheel brakes are applied by spring pressure and the wheel brakes are released by oil pressure. The parking brake tests consist of the following two tests.Brake Drive Through Test
Note: This test should be conducted when the truck is empty.
Move the parking brake control to the ON position.
Move the transmission control to the FIRST GEAR position.
Increase engine speed to 1300 rpm. The machine should not move.
If the machine moves, inspect the brake system for wear or for damage. Correct the air pressure. See the Systems Operation/Testing And Adjusting, "Braking System Troubleshooting".Brake Slope Test
Note: This test should be conducted when the truck is loaded to the normal rated capacity.
Load the truck to the normal rated capacity.
Park the machine on a slope of no more than 15 percent.
Depress the service brake control.
Shift the transmission control to NEUTRAL.
Move the parking brake control to the ON position.
If the machine moves, inspect the brake system for wear or for damage. Correct the air pressure. See the Systems Operation/Testing And Adjusting, "Braking System Troubleshooting".Secondary Brake Check
Note: The secondary brake air control valve activates all the wheel brakes. The wheel brakes are applied by spring pressure and the wheel brakes are released by oil pressure.
Start the engine and allow the air system to build up to the operating pressure.
Do not depress the secondary brake control.
Move the transmission control to the NEUTRAL position.
Depress the secondary brake control fully.
Move the transmission control to the FIRST GEAR position.
Increase engine speed to 1300 rpm. The machine should not move.
If the machine moves, inspect the brake system for wear or for damage. Correct the air pressure. See the Systems Operation/Testing And Adjusting, "Braking System Troubleshooting".Retarder Brake Check
Note: The retarder air control valve activates the front brakes and the rear brakes.
Stop the machine in a level area.
Pull the manual retarder control lever completely to the down position.
Move the transmission control to the NEUTRAL position.
Move the parking brake control to the OFF position.
Move the transmission control to the FIRST GEAR position.
Increase engine speed to 1300 rpm. The machine should not move.
If the machine moves, inspect the brake system for wear or for damage. Correct the air pressure. See Systems Operation/Testing And Adjusting, "Braking System Troubleshooting".Check The Warning System (Air System)
Turn on the battery disconnect switch.
Start the engine.
Allow the pressure to reach approximately 690 kPa (100 psi).
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