ELECTRO-HYDRAULIC CONTROLS CONTINUED
6. Reverse Travel Continued
N OT E
The duty cycles determine the angle of the pump and motor swashplates. The machine
ECM (Figure 11, Item 2) varies the duty cycles based on signals received from the travel
speed switch in the joystick (Figure 11, Item 1). The machine ECM also adjusts the duty
cycles based on signals received from engine speed sensor (Figure 11, Item 11) and
motor speed sensors (Figure 11, Items 9 and 10) in order to prevent an overspeed,
underspeed, or stall condition, and to ensure the machine is tracking in a straight line.
Figure 11. Machine ECM Inputs and Outputs for Reverse Travel.