I wouldn't bother.... it's a crappy way to reef the sail anyway, and if the mechanism is already questionable then it may be more trouble than it's worth.
If the boat has been fitted with a vang in the interim that will negate using the feature too ...
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
1984 Fast/Nicholson 345 "FastForward"