Ok, that's a control valve issue...or the most favorable situation is you don't have the control valve set in the dead center. You'd need to experiment to see if the wheels stay stationary at some spot in the steering wheel's rotation (wheels elevated). And it can be touchy.
Some of these are not difficult to rebuild and some are pretty tedious, but the first step is to figure out which box you have. Is there any way you can post or email digital images so we can see? My email is
[email protected]
