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 General Sailing Forum
 Drill out the rivets on the sheaves?		  New Topic  Topic Locked
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dblitz
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240 Posts
Initially Posted - 04/12/2007 :  14:52:41  Show Profile
The sheaves for the internal jib/main halyards on the mast have deteriorated. Should I just swap them out or should I drill out the rivets, replace the delrin plastic and rivet using SS rivets?
Daniel 86 "Solar Wind" #5339 C-25 FK/SR I/B Diesel
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John Mason
Admiral

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USA
687 Posts
Response Posted - 04/12/2007 :  18:58:24  Show Profile
Which sheaves are those - masthead or exit block? Exit blocks - I'd just pick up some new ones and not go through the trouble of finding the right sheaves and drilling the rivets out, etc.
Edited by - John Mason on 04/12/2007 19:00:20
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Heartbeat
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USA
161 Posts
Response Posted - 04/12/2007 :  20:24:24  Show Profile
I would not recommend drilling on the masthead. You only have one set of holes for the pins. (I have even seen people who silicone the SS cotter pins in place to limit pin rotation.) Remove the cotter pins and use a punch to tap (gently) the pins out. Replace with new sheaves and lubricated pins.

If you are concerned about mast exit blocks, drill out the rivets and replace the whole exit block assembly as John suggests.

:-)

Matt
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jerlim
Master Marine Consultant

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USA
1484 Posts
Response Posted - 04/13/2007 :  08:45:40  Show Profile
Just pull out the pins. It is MUCH easier w/ the mast down however!
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.