Operation - Section 3 OM3020.2 12/99 Page 3-16 Operator Cab and Controls HEATER / AIR CONDITIONER COMPARTMENT AND CONTROLS SELECTION CONTROL SWITCH The heater/air conditioner compartment contains the heater/air conditioner controls (6, Figure 3-1) and some of the heater/air conditioner components, such as the blower motor assembly and heater coils. Opti- mum cab air climate can be selected by using the following controls in various combinations. The Selection Control Switch (6, Figure 3-3) is provided for the operator to select a comfortable temperature. Rotating the knob counter-clockwise (blue arrow) will select cooler temperatures.
Full counter-clockwise position is the coldest air setting. Rotating the knob clockwise (red arrow) will select warmer temperatures. Full clockwise position is the warmest heater setting. DEFROSTER VENT CONTROL SWITCH The defroster control switch (1, Figure 3-3) directs heated air for windshield defrosting. “Down” position of the toggle switch is OFF. “Up” position of the toggle switch is On. HEATER/AIR CONDITIONER VENTS These heater/air conditioner vents (7, Figure 3-3) may be rotated 360°. Air flow through the vents is controlled by manually opening/closing or turning the louvers.
HEAT VENT CONTROL SWITCH The heater control (2, Figure 3-3) directs heated air to the cab floor for heating of the cab. “Down” position of the toggle switch is OFF. “Up” position of the toggle switch is On. FAN CONTROL KNOB The fan control knob (3, Figure 3-3) is provided to control the cab air fan motor. The fan motor is a 3-speed motor (low, medium and high). Speeds are selected by rotating the control knob clock- wise to the desired position. “Off” is full counter- clockwise position. AIR CONDITIONER CONTROL KNOB The Air Conditioner control knob (4, Figure 3-3) controls the air conditioner to cool the cab air.
Cooler temperatures are selected by rotating the control knob clockwise to the desired tempera- ture. Full clockwise position is coldest setting. “Off” is full counter-clockwise position. OUTSIDE/INSIDE AIR CONTROL SWITCH The outside/inside air control switch (5, Figure 3-3) allows either outside or inside air to be circu- lated through the cab heater assembly. Moving the switch “Up” directs outside air to be circulated through the heater assembly and through the cab. Moving the switch “Down” directs inside air to be recirculated through the heater assembly. FIGURE 3-3. A/C & HEATER CONTROLS