Hi all..... I have a 99 internationl dump truck that has an air dryer that sometimes will not hold the air. Seems to happen when I am building up air in the morning. I start the truck and the air starts to build and then blows off repeatedly and then starts working again when it feels like it. Its happened about 6 times in the last year......Help please.
change your purge valve, clean out inside where it sets good and change the air dryer filter.