To switch from standard (std) to joystick (jd) controls on a John Deere 490E excavator, locate the control pattern switch, typically found on the machine's control panel or near the operator's seat. Flip the switch to the desired control pattern. After switching, test the controls to ensure they are functioning as expected. Always consult the operator's manual for specific instructions related to your model.
I paid $100 for one in 2012