Copyright Goodheart-Willcox Co., Inc. 821 Chapter 24 ∣ Track Steering Systems The operator selects the direction of propulsion and the transmission speed first, such as forward first gear. The positions of the steering clutch and brake controls dictate if the tractor will be propelled or steered or both. For the example in Figure 24-11, the steering clutch and brake controls have just three positions. If both steering levers remain all the way forward, the tractor travels straight in one direc- tion, either forward or in reverse depending on the transmission control lever. If one steering lever is pulled halfway or fully backward, the tractor steers. See the table in Figure 24-12 and the mechanical control levers in Figure 24-13. Left steering control Right steering control Powershift upshift button Powershift downshift button Forward, neutral, and reverse control Transmission gear and speed control lever Left track steering lever Right track steering lever A B Steering Lever Position Steering Clutch Status Steering Brake Status Completely forward Engaged Released Halfway back Released Released Fully backward Released Engaged Transmission in Forward 1st Gear Type of Steer Left Steering Lever Position Right Steering Lever Position Left gradual steer Halfway back Completely forward Left sharp steer Fully backward Completely forward Right gradual steer Completely forward Halfway back Right sharp steer Completely forward Fully backward Forward (straight path) Completely forward Completely forward Figure 24-10. A—This D6R steering clutch and brake control consists of an electronic fingertip control. B—This D5H clutch and brake dozer has have mechanical control levers the operator must use to move the machine. Goodheart-Willcox Publisher Goodheart-Willcox Publisher Goodheart-Willcox Publisher Goodheart-Willcox Publisher Figure 24-11. The status of the steering clutches and brakes on the left or right side of the machine is determined by the position of the corresponding steering control lever. Figure 24-12. The operator’s movement and positioning of the steering levers determine the directional steering of the tractor.