I installed a LA853 front loader on my L5030HSTC tractor. My problem is when I go to lower the bucket by pushing lightly on the joystick the bucket goes UP! If I push the joystick HARD it will go down but not at the speed I might need depending on job I'm doing. And by having to push hard on the joystick I get a big bounce/jerk which shakes the tractor. Any ideas out there?