Air Injection Pump: Description and Operation

Thermactor Air Supply Pump:

The Air Supply Pump is belt-driven, positive displacement, vent-type pump which is available in 19 and 22 cubic inch sizes, both of which may used with different pulley ratios for different applications. This pump supplies air for the Thermactor system. The air is received from a remote silencer filter on the rear side of the engine air cleaner attached to the pump air inlet nipple or through an impeller-type centrifugal filter fan.