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 ...
1984 Fast/Nicholson 345 "FastForward"
".. 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)