Driver Controls and Instruments A three-speed fan switch controls the flow of air to any selected air vents. The side panel vents allow heated forced air to be di- rected vertically and horizontally. The center air panel vents, located on each side of the heater control panel, allow unheated forced air to be directed vertically and horizontally and can be opened or closed independently by means of a built-in damper. See Fig. 3.23 . The roof vent (see Fig. 3.24 ) can be adjusted to five different positions but is not removable. To adjust, hold the lateral bars and incline the ventilator forward, back- ward, or to either side. To open completely, push the ventilator upward.
1 1 1 3 2 f601423 08/27/97 1. Roof Vent Adjustment Bars f601441 1. Center Air Panel Vents 2. Vertical and Volume Airflow Control 3. Horizontal Airflow Control Fig. 3.24, Roof Vent The foot-level vents, located on each side of the front cab wall under the instrument panel, are opened or closed by moving the actuator lever on the vent. See Fig. 3.25 . Fig. 3.23, Center Air Panel Vents 3.18