Bought my first 550, a 1965, final price ended up $700. It's in decent shape all things considered but will take a fair amount of TLC and time. After replacing the coil and rebuilding the carb it started right up, engine sounds good. The front end loader is from ARPS in WI, not sure of the model label is worn but it operates fine, external hydraulic control, Vickers model SP212, some hoses will need replacing. Tractor has power steering but the cylinders may be leaking. I've been laid up for a week due to a woodcutting accident so I've had lots of time to read all three of the service manuals, loads of great info. In previous posts I mentioned the PTO does not shut off. I checked the fluid level and it doesn't register on the dip stick. Looking at the manuals it shows the control lever behind the seat right side, missing on mine. Visited Agpartsfirst website and saw a parts list that showed a lever in front of steering wheel right side. It flops freely, moves some when clutch is depressed but still has free play. What am I missing?