looking for wiring diagram and parts listing. I have narrowed issue of not driving or elevating to the joystick proportional circuit. It appears that the drive and lift circuits use the same proportional valve and just switch the hydraulic circuits for each function. I have power to the joystick and the solenoids controlling the functions but looks like no signal is being generated to the proportional valve, which I assume is probably a PWM signal. If someone has a service or parts manual related to this function they could email, It would be very much appreciated. Thank you.