AIR STARTING SYSTEM
1. Balanced whistle valve. 2. Oiler. 3. Air motor.
The air starting system is mounted on the right side of the engine. Air for the starting system is furnished by an auxiliary air compressor. Air is delivered through a receiver to a remotely mounted pressure regulating valve where the pressure is regulated to suitable starting pressure.
The balanced whistle valve (1) controls the passage of air to the air motor (3). As the air passes through the oiler (2), it picks up oil spray which is deposited on the rotor and vanes of the air motor.
FLOW OF AIR THROUGH STARTING MOTOR (VIEWED FROM DRIVE END OF MOTOR)
An air director tube in the air passage through the body delivers pressure above the oil in the bowl. Oil flows from the bowl through a tube and drilled passage to a chamber under the top plug on the body. From the chamber, oil flows through the oil drip gland which meters the flow of oil to about four drops per minute.