I just installed a PacBrake, while testing I let it run for 4-5 minutes but it didn't shut off. My question it this: how long should it take to fill the 1/2 gallon tank to max pressure to shut off?

 

Not sure but i think its pac brake that has the warm up mode. stays on till the water temp is 170.

 

This one's not connected to the ECM. It's set up for only manual control.

 

turn it on and use soapy water to check for leaks

 

It should only pump for 1 to 2 min. Check for a leak.

 

Thanks for the help. Fixed it yesterday. Two leaks: one at the compressor and one at the silonode.
Two tasks left:
1) Finding a "mosture free" area under the truck to mount the air intake
2) Installing an in cab indicator light for the compressor to alert me when it's running. (only way I'll know I have a leak while driving)