I recently purchased a 1978 Ford 7000 equpped with a road striping unit. It has a Leroi Dresser Compressor. It also has a hydraulic system driven by a Perkins diesel engine that drives both the hydraulics and the compressor. It starts up with no problem and will pump air up to 160 lbs, psi and then pops off the pressure relief mounted on the tank. I have no idea what is wrong and who can service this in the upstate Albany, New York area. I would also like to know if there is a manual, parts list. etc that I could obtain. Please call me as soon as possible, it is important that I get this truck up and running as I have work scheduled for this truck. My phone number is 518-857-8200. Thank you, Joe Kelley, Northeastern Striping Services, Inc.