Well the parts came and I set out to rebuild the blue ox 10,000lb tow bar.
In less than 2 hours it is complete including new paint ( took it apart yesterday).
So for those who wish, it is not difficult or too technical.
Thanks to the folks at blue ox they were great.
Total expense including shipping, new boots, washers, lock nuts, springs and roll pins was less than $50.
The only tool I needed to borrow was a 1 1/16 deep thin wall socket.