The air compressor is flange mounted to the flywheel housing and is gear driven. The air compressor is lubricated from the engine oil lubrication system and is cooled through the engine cooling system. The model identification number is located on a plate that is attached to the air compressor crankcase.

A coolant inlet pipe provides coolant from the engine head to the air compressor. The coolant outlet pipe carries hot coolant back to the engine block.

An oil supply tube provides lubrication from the engine block to the air compressor. The oil is returned to the engine through the air compressor crankcase.

As the air compressor piston moves downward, air is drawn into the cylinder through the inlet valve of the cylinder head. This action is referred to as the intake stroke. As the piston begins to move upward, the inlet valve closes and the air above the piston is compressed. This action is referred to as the compression stroke. When the air pressure in the cylinder is greater than the air pressure in the air reservoir, the discharge valve raises off of the discharge valve seat. Air is then allowed to pass through the exhaust port and out of the discharge tube. As the intake stroke begins, the discharge valve seats again.