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Air Brakes 1989 International with DT360 Steve 5-25-09  
I'm very new with air brakes. Drove this school bus from Miami to Baton Rouge with no problems. Let the bus sit for a week and now the air won't come up to pressure. Need to know how to check the compressor. Thank you thank you,
Re: Air Brakes 1989 International with DT360 wrench 5-25-09  
The regulator on the side of the compressor is probably stuck, tap on it or check if it's not leaking at the side.
Re: Air Brakes 1989 International with DT360 Steve 6-3-09  
I did find a loose connection...a small hose at the dryer. However, it still won't come up to pressure. It does come up a little more. I'm really new at this so was wondering about the belt tension. How do you know if it's tight enough? How much deflection?
I'll check the the regulator but after looking at almost every other connection, there doesn't appear to be any air leaks. If I pull a little plastic cover off the regulator, there is an adjusting screw with a lock nut. It appears to be brass. Would it help if I exercised this setting making sure it was returned to the original position?

Thanks for your previous response. Since I'm money challenged, I have to work all this stuff out myself.

Re: Air Brakes 1989 International with DT360 Steve 6-3-09  
I wanted to add that the compressor is a Bepco-Tuflo belt drive.
Re: Air Brakes 1989 International with DT360 wrench 6-7-09  
The belt should deflect about 1/2" per 12".
The way it work, the regulator control the air going to the intake valve, when the pressure reach the pre-adjusted point it let air go trough & close the valve so the intake vale close & keep the compressor from getting air to compress. Having a status of not building pressure= the regulator is letting air trough to the valve & keep them closed & not getting air to compress.
Disconnect the small hose or tube going to the regulator & it should start to built pressure, if not then you got an other problem.
Re: Air Brakes 1989 International with DT360 Steve Immel 6-28-09  
There are two hoses to the regulator. I disconnected one at a time. No change. I did tighten up the belt and got a few more pounds but that's it. Is there a way to test the lbs/sq inch on the output at the compressor to see if the problem is a leak or closed check valve somewhere else?

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