Bus AC compressor. TM-31. HP310(310cc) Compressor. Direct mount, 8 groove pulley. 152mm Clutch diameter, 5 eye clutch.Oil type PAG46, capacity 16 oz. Used in secondary AC systems for shuttle bus, ambulance. Replaces TM31. We will have this in stock when you need it. Remember to replace your filter drier. We sell more than shuttle bus air conditioning compressors. Please browse our store for all of your shuttle bus parts needs.