I've just installed a vintage air system on my street rod. I bought the compressor about 4 years ago while modifying brackets to install. Finally got around to charging the system, but when I engage the compressor (Sanden) on the control panel I have a loud screeching noise. I have a serpentine belt running all accessories. When I engage the compressor the belt seems to stop and not turning around compressor pulley. I sprayed the front of the compressor clutch with WD 40 which helps noise for about 30 min. but it reappears. System is cooling. Compressor cycles off/on, but screeching starts again when WD 40 wears off. Could the compressor be bad? Any help is very appreciated!