Air Supply

[ttikalsky]

Anyone know where the air source selector valve is located? When I start the Detroit motor the air compressor only fills the air brake system and won't start filling the air supply system until I run the onboard compressor and bring the air supply system up to 70+ pounds. After that both air systems are filled and maintained by the main compressor mounted on the Detroit motor.

Troy Tikalsky
1986 Newell WB40 DD8V92
Waconia, MN