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.

When replacing the compressor, drain any oil from the new compressor. Drain the oil from the old compressor into an approved container. Note the amount drained. If less than 60 ml (2 fl oz) was drained, add 60 ml (2 fl oz) to the new compressor. If more than 60 ml (2 fl oz) was drained, add the same amount of new clean oil to the compressor.