I replaced the compressor unit/ pump [ol195b,h1503tp]. I started it and it went up to 120 p.s.i.and didn't shut off or continue to fill. The parts list shows a new pressure switch starts at 125 psi and off at 150 psi.. So is the new compressor pump faulty or the pressure switch. Thanks for any help. darryl, I've got a Ram Air 77043 150 PSI air compressor that needs a new pressure switch. Since this company was bought out by Campbell Hausfeld, I can't find any parts. It's a great compressor. Any help would be appreciated., 9. Drain the Air Compressor’s Tank (part #50) every day. Do not allow moisture to build up inside the Tank. Do not open the Tank Drain Valve (part #59) so that more than four threads are showing. 10. Avoid injury. Never direct the Air Outlet Valve (part #69) at people or animals. 11., Halas, What is the model number of your air compressor? I'm sure I can help you find the parts you need. For quicker assistance, please call one of our sales associates at 757-547-8665 and someone can easily locate the parts for your air compressor., But it is a 5 H.P. 30 Gal tank compressor, bore is 2 7/8", stroke 2", Volt single Phase 240, fuse type Fusetron Type "T". The model # is 919.176951 Do a search and you should find multiple web sites that at least have the parts manual with diagrams and parts list., Air compressor parts was created by Cmcfarm I have a kobalt air compressor model# 0320541 where can i get orings and such for cylinder head cover and piston Please Log in or Create an account to join the conversation..