PLATFORM G-LH 6C0227 - Caterpillar

Illustration 1 g01280380
(1) Relief valve
(2) Air compressor
Illustration 2 g01116085
(3) Air compressor governor
(4) Relief valve
(5) Air tank The air system has two functions. The air system is used for the following functions:
Inflate tires that are low.
Blow off the machine.Air compressor (2) is driven by the engine through the timing gears. Air compressor governor (3) regulates the air pressure for the system.When the engine is started, the air compressor operates. The air compressor will operate until the pressure reaches the cut out pressure of the governor. At this pressure, the pressure air 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. Pressurized air will hold the unloading valves open in order to stop the flow of air from the air compressor.The pressurized air in the air tank (5) provides the signal to the governor. When the system air pressure reaches the cut-in pressure setting, the force of the spring in the governor moves the piston in the governor. This action stops the flow of air to the unloading valve. The unloading valves close and the air compressor will send air to the air tank.Relief valve (4) is located in air tank (5). If the governor does not operate correctly, relief valve (4) will open in order to prevent damage to the air system.Relief valve (1) is located on air compressor (2). If both the governor (3) and the relief valve (4) fail, relief valve (1) will open in order to prevent damage to the air system.Note: For more information on the relief valve settings, refer to the Specifications section.