SFWR GP-A4003 3322705 - Caterpillar

Illustration 1 g01383840
Typical Example (1) Air compressor (2) Air compressor governorNote: Orientation of the air compressor governor will depend on your specific engine arrangement.The engine operates air compressor (1) through the timing gears. The air compressor governor (2) controls the air pressure for the system.The air compressor governor keeps the air pressure constant in the system. When the engine is started, the air compressor operates until the pressure in the system is at the cutout setting. At this cutout setting, the air pressure moves the piston in the air compressor governor. This allows the air to flow through the air compressor governor. Then, the air flows to the unloading valves in the air compressor. Air pressure holds the unloading valves open in order to stop the flow of air from the air compressor.The pressure air from the left section of the air tank provides the signal to the air compressor governor. When the system air pressure reaches the minimum cut in setting, the force of the spring in the air compressor governor moves the piston in the air compressor governor. This action stops the flow of air to the unloading valve. The unloading valves close and the air compressor again sends air pressure to the system.ReferenceFor the pressure settings of the air compressor refer to Testing and Adjusting, "Air Compressor Governor - Test and Adjust".