Export thread

I have a Craftsman 917.270532.

I need to replace the wire for the lift assembly. It is going to be part 1 (wire) and part 3 (pin) on the diagram below. Do I need to take off the arm to do that? How would I replace those two things?

http://www.searspartsdirect.com/par...P0020369/00009?blt=06&prst=0&shdMod=917270532

Alex