How do I replace linkage rods on mower deck on a wizard 14 hp 42 in. craftman deck.

Hi,
Do you speak of the ones on the sides beneath the running boards or the ones in front?
Generally you would unmount the deck. The ones on the sides generally point forward and slightly up when deck is mounted. Pointing them rearward will usually line them up to the removal point.
A model number always helps.
Peace,
Clarke