Air dryer rapid cycling
(I tried to search for relevant topics, but didn't find any that were helpful)
My air dryer purges about once in two minutes, which does not seem normal. I have done the following:
1. Listened for large leaks, and heard nothing over the engine sound. After a light air discharge of about ten seconds, no air sounds when engine is turned off.
2. Watched pressure gauge for several minutes with engine off. The gauge slowly moves to no pressure in about 36-48 hours.
3. Watched the pressure gauge with brakes applied. The gauge drops about 15 pounds on application of brakes, and does not visibly move in four minutes.
4. Rebuilt the air dryer - It was apparently original. No shocking build up of oil or moisture inside.
5. Watched the air gauge in normal driving. It does not move significantly.
6. Noted a small leak when the air brake "button" is slightly sideways. Still takes about 24 hours for system to leak down. When running, the air dryer purges similarly when brake on or off.
I am thinking an overactive governor, in need of replacement. I welcome your thoughts.
Matt B
1998 Monaco Windsor DP with air brakes and air suspension, purchase about 1 year ago. service records incomplete
My air dryer purges about once in two minutes, which does not seem normal. I have done the following:
1. Listened for large leaks, and heard nothing over the engine sound. After a light air discharge of about ten seconds, no air sounds when engine is turned off.
2. Watched pressure gauge for several minutes with engine off. The gauge slowly moves to no pressure in about 36-48 hours.
3. Watched the pressure gauge with brakes applied. The gauge drops about 15 pounds on application of brakes, and does not visibly move in four minutes.
4. Rebuilt the air dryer - It was apparently original. No shocking build up of oil or moisture inside.
5. Watched the air gauge in normal driving. It does not move significantly.
6. Noted a small leak when the air brake "button" is slightly sideways. Still takes about 24 hours for system to leak down. When running, the air dryer purges similarly when brake on or off.
I am thinking an overactive governor, in need of replacement. I welcome your thoughts.
Matt B
1998 Monaco Windsor DP with air brakes and air suspension, purchase about 1 year ago. service records incomplete
