I have just had a 1956 Buick steering unit rebuilt to correct a seal leak. After installation,when the car is started, the steering wheel turns itself to the left. This occurs without moving the car. It seems that this has something to do with the power steering system, which worked fine before we had the steering unit rebuilt. Any idea how to solve this problem?
It is very likely that the spool valve was not properly adjusted. Adjustment is not difficult if you are familiar with how the system works.
The block on top of the steering box where the high pressure hose is attached is not quite centered, which moves the lever over a little which directs the fluid into chamber that causes the box to turn left.