Last spring I had the mast down for the first time since I bought the boat, One of the things I was planning to do was replace the sheaves. I was able to get the plates off with an impact driver, but I could not budge the sheaves. Unfortunately, I did not take a picture of what it looked like with the plate off, so I don’t remember what the problem was, but I had a small sledge hammer and spike and could not budge it. I should have posted at the time, but sheaves seemed fine so I did not pursue it then. Anyone had this problem? Dave
> On Jan 31, 2021, at 11:25 AM, CHARLES SCHEAFFER via CnC-List > <cnc-list@cnc-list.com> wrote: > > I wouldn't try replacing mast head sheaves unless the mast was out and placed > somewhere I could work on it safely. > The mast head sheaves on my Offshore Spars mast ride on SS axles and they are > captive inside the welded mast. I had the mast pulled and did the following: > > Step 1: remove the halyards and rig pull strings. (You will later need pull > strings or halyards to hold the new sheave in position to insert the axle) > Step 2: remove two screws holding on a SS plate that blocks the exit hole for > the sheave axle on one side > Step 3: use a small 3# sledge hammer and a 1/4" punch that fits into the > little hole on the other side and drive out the axle > Step 4: catch the sheave as it drops through the halyard exit slot when the > axle is part way out. > > Install new sheaves following steps in reverse order. > > In my case the main halyard sheave rides alone on a 1/2" axle and two > spinnaker sheaves ride on an axle and the jib halyard rides on it's own axle. > I can share pictures. > > Chuck Scheaffer Resolute 1989 C&C 34R David Knecht S/V Aries 1990 C&C 34+ New London, CT
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