Operation - Section 3 OM3024.2 8/00 Page 3-16 Operator Cab and Controls HEATER / AIR CONDITIONER COMPARTMENT AND CONTROLS TEMPERATURE CONTROL KNOB The heater/air conditioner compartment contains the heater/air conditioner controls (6, Figure 3-4) and some of the heater/air conditioner components, such as the blower motor assembly and the heater coils. Optimum cab air climate can be selected by using the following controls in various combinations. The Temperature Control Knob (5, Figure 3-6) is pro- vided for the operator to select a comfortable tempera- ture. 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 set- ting. DEFROSTER VENT CONTROL SWITCH The defroster control switch (1, Fig- ure 3-6) directs heated air for wind- shield defrosting. “Down” position of the rocker switch is OFF. “Up” position of the rocker switch is On. AIR CONDITIONER CONTROL KNOB The Air Conditioner rocker switch (6, Figure 3-6) is a three position switch and it controls the air condi- tioner to cool the cab air. Pressing the switch to the left will turn the air conditioner "ON".
When the switch is in the "Center" position, the air conditionerand the heater are both "ON". When the switch is pressed to the right side, only the heater is "ON". OUTSIDE/INSIDE AIR CONTROL SWITCH The outside/inside air control switch (2, Figure 3-6) allows either outside or inside air to be circulated through the cab heater assembly. Pressing the switch “Up” directs in- side air to be recirculated through the heater assembly. Pressing the switch “Down” directs outside air to be circulated through the heater assembly and into the cab. HEAT VENT CONTROL SWITCH The heater control (3, Figure 3-6) directs heated air to the cab floor for heating of the cab.
“Down” position of the rocker switch is OFF. “Up” position of the rocker switch is On. FAN CONTROL KNOB The fan control knob (4, Figure 3-6) 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 clockwise to the de- sired position. “Off” is full counter- clockwise position. FIGURE 3-6. A/C & HEATER CONTROLS