Troy Bilt 50" mower decklift handle spring broken, need help replacing

[poolguy]

I have a Troy Bilt 50" mustang mower that broke the spring on the deck lift handle rod. I do not know how to get the old one off, let alone get the new one on. Has any one put one on before.
Thank you very much!
Ken

 

[mechanic mark]

A pair of vise grips & muscle.