THEORY OF OPERATION - CONTINUED
AIR CONDITIONING SYSTEM
The air conditioning unit is part of the heater and is mounted under the glove compartment. It is a single unit consisting
of a heater core, air conditioning evaporator coil, blower motor, control valves, and air ducts.
The system is turned on by the mode control lever on the instrument panel in the cab. The four-speed blower switch con-
trols flow rate.
An even cab temperature is maintained by controlling the coolant flow through the heater core, or refrigerant flow
through the evaporator coil.