What is this?

[npalen 2]

Wondering is someone might be able to tell me what the extra lug is for on this 3P link. The one with the hole and zerk. Thanks Nelson

[npalen 2]

Sorry, meant to post this in Talking Tractors. This an Allis 720.

[JP 0]

Hey Nelson, There's a 'shouldered' pin that moves to lock or unlock the arms. This allows the 3pt to physical float or to have down pressure from the hydraulics. If you look through the hole where the zirk is & move the arm up/down you should see what I mean..... JP

[npalen 2]

Jim Now I'm embarrassed. The other side has the shouldered pin installed and I couldn't figure why that side didn't want to float like the side without the pin.:I Guess I need to make a second pin. Thanks for your help.