Tiger BENGAL BRUTE JD 62-6420 - Manual (Page 57)

ASSEMBLY
Assembly Section 2-25
BOOM JOYSTICK CONTROL CALIBRATION
SUB-D
This Danfoss PVG32 control valve is now equipped with higher-resolution actuators on Main
Boom, Secondary Boom, Deck Roll, and Swivel functions. These actuators have “active fault
monitoring”. The Deck Shield section does not have “active fault monitoring”. The joystick is
unchanged and provides a ratio-metric voltage signal. The neutral signal voltage is half or 50%
of tractor supply voltage. A 25% signal voltage will shift the valve spool to full “A-Port”, and 75%
signal voltage will shift the spool to full “B-Port” in the Main, Secondary, and Swivel valve
sections. On the Deck Roll function a 34% signal voltage will shift the valve spool to full “A-Port”
and a 68% signal voltage will shift the spool to full “B-port”. If an actuator with active fault
monitoring receives a signal from the joystick that is less than 15% or greater than 85% of supply
voltage the actuator will “fault out” and shut down. Also if there is an internal failure in the
actuator or if the spool position is greater than that specified by the signal voltage from the
joystick, the actuator will “fault out” and shut down. An “active fault” condition causes the
actuator to drive the spool to neutral, shut down, and activate a “red” LED on the top of the
actuator. The active fault can be canceled by simply cycling the Master Switch “OFF” and then
“ON”, which resets the fault monitoring, and causes the LED on top of the actuator be “green”
again..
The joystick control is equipped with signal adaption potentiometers.
These provide the capability to individually adjust the oil flow to each boom function. It is
important that the boom functions do not travel too fast. Excessive boom speed can reduce the
stability of the unit and decrease operator control.
Note: Use a Phillips screw driver and be sure to adjust the screws carefully! DO NOT turn
the potentiometers beyond their stopping point, potentiometers are very delicate! Turning the “A”
or “B” port potentiometers clockwise increases the oil flow to increase the boom function speed,
and turning them counterclockwise decreases the oil flow to decrease the boom function speed.
See the graphic on the next few pages for help in adjusting.