Mike L
Senior Member
my brand new used service truck has a boss series 35 hydraulic compressor on it. When I turn on the compressor the idle will speed up and it will build 150 psi but never sounds like it shuts off and truck doesn’t idle down unless I shut off the compressor. Contacted boss and he said There was nothing wrong as it is a rotary screw compressor and that’s what they do. Previously I had vanguard compressors which only idled the truck up when it was building air and then returned to low idle. Anybody have any insight on this? I really hate to have the truck idled way up the whole time the compressor is on and it’s a pain to turn it on and off every time I need air.