Old Part Numbers: BG1-M-175Air compressor pilot unloader valve with adjustable pressure range.Specifications Cut-In/Cut-Out PSI: 145/175 PSI 1/4" Compression Inlet x 1/4" Male Outlet Heavy-duty brass...

Old Part Numbers: 31101990CHReplace these if bent or worn. Check crank for damage first. Same rod for hi and lo pressure piston (includes upper bushing). Insert Bearings NOT included! Order...

Located between Intercooler which leads to tank and pump head. (for newer non-gasket style) (ea.) - not shown.