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 heater core, air conditioning evaporator coil,
blower motor control valves, and air ducts.
The system is turned on by the mode control lever on instrument panel in cab.
The four-speed blower switch controls flow rate.
An even cab temperature is maintained by controlling the coolant flow through
the heater core, or refrigerant flow through the evaporator coil.