HydraMaster

The MAC vacuum control solenoids work in conjunction with the temperature controller to operate the exhaust diverter actuator. When not functioning properly the actuator won't open and the unit will often under perform in heating. There are two solenoids employed one as a primary and one as a secondary, it's recommended to change both at the same time.

Float valve assembly.

HydraMaster bypass orifice.

Electric clutch for the Hydra2 water pump used on HydraMaster Boxxer 421 and Spitfire series truckmounts. This is a 12V single groove clutch, measuring 7" in diameter, and a 24MM center bore.