Air Conditioning/Heating System (General Information)

Air is drawn into the cab through air intake vents (A). This air flows down air duct (B) and into the pressurizer fan (C). The air is then pushed through the precleaner (D) where the majority of dirt and a small amount of air is discharged out through the cab floor. Be certain this opening is open.

This cleaned air then passes through fresh air filter (E) into the evaporator compartment. The air is now mixed with air from inside the cab, being drawn into the evaporator compartment through the recirculating filter (F) and the evaporator filter. The air is then drawn through the evaporator / heater core (I).

Treated air (heated or cooled) is now drawn into the recirculator blower (G) and discharged into the cab through air vents. (H).

Air conditioning system low pressure switch (J) is located left of the evaporator compartment.

A-Air Intake Vents
B-Air Duct
C-Pressurizer Fan
D-Precleaner
E-Fresh Air Filter
F-Recirculating Filter
G-Recirculating Blower
H-Air Vents
I-Evaporator/Heater Core
J-Air Conditioning Low Pressure Switch

AG,OUO6038,1199 -19-11OCT99-1/1