Cab Temperature Control System

N83727-UN-08APR09

H74764-UN-14JAN03

A - Temperature Control Knob

B - Mode Selector

C - Fan Speed Control Knob

D - Cab Temperature Sensor

Rotate temperature control clockwise to increase temperature in cab or counterclockwise to decrease temperature.

The mode selector has three positions:

• OFF (bottom). Compressor and fan are both off.
• ON (middle). Compressor and fan operate as necessary, based on settings of temperature control and fan speed control.
• DEFOG (top). Compressor runs to remove moisture from air, regardless of temperature control setting.

NOTE: Cab temperature sensor is located behind instructional seat. Do not cover sensor or system may not operate correctly in AUTO mode.

Rotate fan speed control knob clockwise to increase the amount of recirculation air directed to air outlet vents in the corner posts.

When the fan speed control knob is rotated fully counterclockwise to the AUTO detent position, fan speed varies in proportion to the difference between the temperature control setting and actual cab temperature. Actual cab temperature is measured by the cab temperature sensor. As actual cab temperature approaches the control set point, fan speed automatically decreases.