John Deere 3720 attachment pick-up hardware are not equal

[marshallcro]

My John Deere 3720 attachment pick-up hardware are not equal when unhooked for attachments. This make it slower to drive up and pick-up something. Is this somehow adjustable ?
Thanks in advance.

 

[kennyd]

Quite often, the pins (#17) get sheared, the allows the timing bar (#16) to rotated the the QA shoes (#9 and #15). The timing bar's job is to keep the two QA shoes mostly aligned and in "time" with each other, but they will never be perfect.

 

[marshallcro]

Thanks for the info. After looking at pin(17) I see that it was replaced with a case hardened bolt by the previous owner. The pin on the other side looks like it is the original part. I'm going to replace the harden bolt with the correct part at some point in time. But after I put in the correct part this still doesn't have an effect on the unevenness of the QA shoes but now I know that a shear pin should be in Pin (17) I appreciate that you sent me the diagram.