fast hitch plow

Your hydraulic tail wheel is part of the lift assist system. Pushes down on the tailwheel to help support plow when lift arms are in raised position

This parts book I have has a lot of models mentioned, someone has removed the info on several models but left the index. The 510 and 210 just have the index pages left. Hold on, I just found another 3 bottom fast hitch plow, model is 309. The pull bar on the 309 has two different part numbers for 14" bottoms 526 171 R91 and 526 157 R91. This is made like 3 point pull bar with fast hitch forks welded at each end.

The 311 has two separate fast hitch forks bolted to plow frame, two part numbers for each side, and it calls them long coupling beam and short coupling beam. The short ones are left side 524 473 R11, right side 524 474 R11. The long ones are left side 526 343 R11 and right side 526 344 R11. This section covers both the 211 and 311 plows 2 and 3 bottom so I would expect the long ones are used on the 3 bottom plow, giving more support for extra weight. If you need anymore e mail me, then I don't need to stay on line while I type and look up items. Hope this helps.