Unscrew the thimble from the top. Use a strap wrench if tight.
Unscrew the set screw at the bottom and you should be able to push the 1/4" rod down and the pawl out of the bottom of the casting.
Be very careful about using heat on it....the tube is only soft (lead) soldered into the casting.
Usually the pawl doesn't wear all that much but the teeth on the plate do.
Arwyn
| 
