The KMC Controls HLO-1004 Drive Bushing and Collar is a precision-engineered 10-pack set designed for HVAC actuator maintenance and terminal unit repairs

providing the tight tolerances required for high-efficiency burner performance in residential and commercial heating systems

it is engineered for use with a cadmium spring to maintain high-sensitivity regulation in commercial gas equipment

Using an incorrectly sized diaphragm will result in immediate seal failure and zero stroke control

the hyphenation is simply a variation in manufacturer labeling

Armstrong Furnace R44704-002 Induced Draft Assembly 30067439-890 The KMC Controls HLO-1004 DriveThe Armstrong Furnace R44704 002 Induced Draft Assembly is a critical OEM replacement component designed to maintain the integrity of the combustion cycle in high efficiency residential and commercial gas furnaces. This 1 20 HP, 115V, 3200 RPM motor works as a draft inducer blower, creating the essential negative pressure required to pull combustion gases through the heat exchanger and safely vent them through the flue. As an exact functional