The Harrison HT-6 compressor is belt-driven by the engine crankshaft through the compressor clutch pulley. The compressor pulley rotates freely, without turning the compressor shaft, until an electromagnetic clutch coil is energized. When applied voltage energizes the clutch coil, a clutch plate and hub assembly move rearward toward the compressor clutch pulley. The magnetic force locks the clutch plate and the compressor clutch pulley together as one unit in order to drive the compressor shaft.

All the replacement compressors from the service parts have 240 ml (8 fl oz) of oil in the crankcase. When replacing the compressors, drain the oil from the old compressor into an approved container. Note the amount drained. Drain the oil from the new compressor. Then, fill the new compressor with new oil in the same amount that was drained from the old compressor.