lubing the airpack

[73m819]

i blead the brakes, now the truck about stops on a dime. i then lubed the air pack, now i only have 75# air pressure at high rpm, it drops to 45 at idle and goes to 0 on shut down, i dont seem to have any leaks, could lubing the air pack cause this?

 

[cranetruck]

The only thing lubing the airpak does is adding oil to the air within the airpak so that the air valves can get lubed and function normally.
Losing air that quickly is bound to be heard. Sure you don't have a leak? Is the compressor and governor working normally?