ENGINE AR-COMPLETE 3486652 - Caterpillar

Illustration 1 g00435998
(1) Spring
(2) Piston
(3) Inlet/Exhaust Valve
(4) SpringThe "Air Compressor Governor" operates using the "Compressor Unloader Pistons" of the air compressor to control the system air pressure. When the "Air Compressor Governor" is adjusted, spring (1) holds the adjustment. For the cut-out pressure setting and the minimum cut-in pressure, refer to Specifications, "Air Compressor Governor" for the Air System and Brakes.When the air pressure supplied by the air compressor increases to the cut-out pressure setting, the air pressure moves piston (2) against the force of spring (4). Piston (2) moves "Inlet/Exhaust Valve" (3) opening the passage to the compressor unloader mechanism. The air pressure flows through the "Air Compressor Governor" to the compressor unloader mechanism. The compressor unloader mechanism halts the flow of compressed air to the rest of the system.When the air pressure entering the "Air Compressor Governor" reaches the minimum cut-in pressure, the spring force (4) is greater than the air pressure acting on piston (2). "Inlet/Exhaust Valve" (3) moves, closing the passage. The action simultaneously opens the exhaust opening of the "Air Compressor Governor". The air compressor sends compressed air flow to the "Air Dryer".