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Message: <blockquote data-quote="skidsteer.ca" data-source="post: 33735" data-attributes="member: 307">GeneIf it will move just a bit  inch, or two then there is likely a problem with the bics system that won't allow the parking brake to unlock, so the wheels won't move (more then a inch or so) and the bics valve won't unlock therefore no loader functions.Often the problem is cause by a bad seat bar sensor (at the pivot point on the seat bar) but can also be caused buy wiring or fuse problem.When all the bics stuff works corectly it sends power to the parking brake coil and to the bics valve that unlock these to let the wheels and loader function.As I said b4 you can remove the park brake and it should drive the wheels, and if you find the bics coils (has 2 wires and was on a aluminum square block on my 553, not certain on this 763) putting power to one and ground to the other wire will power up the coil and unlock the valve.ken</blockquote>