THEORY OF OPERATION - CONTINUED
ELECTRO-HYDRAULIC SYSTEM - CONTINUED
Joystick Position Sensors.
Joystick position sensors are implement ECM inputs which continuously communicate joystick control
position to ECM. When an operator moves left or right joystick control tilt feature, tilt position sensor
informs ECM that duty cycle of a tilt sensor has changed. When an operator moves front or rear joystick
control lift feature, lift position sensor has changed. ECM sends appropriate current to appropriate propor-
tioning solenoid in oil manifold pilot valve. Current to valve regulates amount of pilot oil through propor-
tional solenoid valve. If pilot oil flows to tilt valve spool in main control valve, tilt cylinder moves. With
joystick control, an operator can send changes in duty cycle of both sensors with one motion.