Can you show me some pics, I may have the parts list..

If it's what I think it is, There are 3 bolt that move on a bracket which should have a strong spring for holding tension.. I find alot over tighten the nuts which stops it from moving..

Do you have a Deck mount bracket like this?
[Linked Image]


Regards,
Paul

Such is life.......
Nothing better than a "GreenField" just mowed..