Operation - Section 3 OM3006.2 04/98 Page 3-14 Operator Cab and Controls HEATER / AIR CONDITIONER COMPARTMENT AND CONTROLS Moving the switch ‘‘Up’’ directs out- side air to be circulated through the heater assembly and through the cab. 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 the heater coils. Optimum cab air climate can be selected by using the following controls in various combinations. Moving the switch ‘‘Down’’ directs inside air to be recirculated through the heater assembly.
DEFROSTER VENT CONTROL SWITCH The defroster control switch (1, Fig- ure 3-3) directs heated air for wind- shield defrosting. ‘‘Down’’ position of the toggle switch is OFF. ‘‘Up’’ position of the toggle switch is On. SELECTION CONTROL SWITCH HEAT VENT CONTROL SWITCH The Selection Control Switch (6, Figure 3-3) is provided for the operator to select a comfortable temperature. 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. 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. 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 clockwise to the de- sired position. ‘‘Off’’ is full counter- clockwise position. AIR CONDITIONER CONTROL KNOB The Air Conditioner control knob (4, Figure 3-3) controls the air condi- tioner to cool the cab air.
Cooler temperatures are selected by rotat- ing the control knob clockwise to the desired temperature. Full clock- wise position is coldest setting. ‘‘Off’’ is full counter-clockwise posi- tion. 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. FIGURE 3-3. A/C & HEATER CONTROLS