TM 10-3930-675-10-1
OPERATION UNDER USUAL CONDITIONS - CONTINUED
0005 00
OPERATE HEATER AND DEFROSTER
0005 00
1.
Start engine and bring RTCH to normal operating temperature.
2.
Rotate heater and defroster selection switch clockwise to desired position to select airflow direction to windshield, oper-
ator or both.
3.
Rotate heater temperature control switch clockwise to desired position to control heater output within the cab.
4.
Rotate fan switch clockwise to adjust fan speed from low to high.
5.
Press cab air circulation control switch to select either recirculated or fresh air within the cab.
NOTE
Air vents are located at each rear corner of cab, as well as on instrument panel.
6.
Control airflow as needed by adjusting louvered openings of air vents.
AIR
CAB AIR CIRCULATION
FAN
AIR
VENT
CONTROL SWITCH
SWITCH
VENT
HEATER AND
DEFROSTER
SELECTION
HEATER
SWITCH
TEMPERATURE
CONTROL
SWITCH
0005 00-23
