04-30-2018, 03:59 PM
Check your air dryer purge valve. Usually on the bottom of the air dryer.
When they fail, you won't be able to build any air pressure & you can't hear the leak due to the noise the engine is making.
When they fail, you won't be able to build any air pressure & you can't hear the leak due to the noise the engine is making.
1987 classic #159
8V92 MUI , Allison 740