Old post for those who may look in the future. On he control valve of this unit there are two plugs, below the steering relief valves, behind these plugs are springs. These springs tend to break and keep the unit from steering. Good advice, replace both springs when you do it. You can also go to bil-jax web site and download service and parts manuals for this machine. Be sure you know whether it is an original or a refurb as some parts are different.