I have an 873 the machine functions normaly untill i try to lower the bucket, lifts fine tilts fine only then i lower the bucket. I switched the actuators same problem, switched the actuator wires and now it will lift and lower but will not tilt. It seems like whatever function is controlled by the right and joystick works fine but if it is hooked to the left hand joystick it does not work in one direction. I moved the guts from one hand controller to the other, same problem. Tested continuity from the controller to the wiring harness, seem to be ok. Any ideas? At a loss... Mikel