PC feedback sensor is mounted on the Rockshaft to sense the position of implement.
Actual hitch position feedback based on angular position of the rockshaft.
The operator appears to have the chain wrapped around or attached to the rockshaft
rather than the drawbar.
More time was spent repairing the rockshaft
assembly after the spring jammed due to decades of rust build-up.
During those years, Dad switched the hydraulic unit on the tractor to that off a late Model B so the rockshaft
could be stopped in the middle instead of going to the end of its travel, as was the design in 1945.