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 Catalina/Capri 25/250 Sailor's Forums
 Catalina 25 Specific Forum
 Upper Shroud Chainplate Torque		  New Topic  Topic Locked
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aaron
Deckhand

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USA
23 Posts
Initially Posted - 10/29/2011 :  16:43:04  Show Profile
Hey all,
Getting ready to rebed my chainplates. Did some searching, but can't come up with a good value for the proper torque settings for the bolts that secure the chainplate to the bulkhead. Anyone know?

Aaron
Summers Off, #5871, 1989 TR/WK, Redding CA
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OJ
Master Marine Consultant

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USA
4382 Posts
Response Posted - 10/29/2011 :  16:55:53  Show Profile
Wow, not sure that question has every been asked! I've never replaced chainplates - but if there are lockwashers, I would tighten the bolts/nuts until they are flat.

If you're looking for a number, I'd suggest contacting Kent Nelson at Catalina.

kent@catalinayachts.com
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Tomas Kruska
Admiral

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Czech Republic
522 Posts
Response Posted - 10/30/2011 :  04:36:12  Show Profile  Visit Tomas Kruska's Homepage
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by OJ</i>
I would tighten the bolts/nuts until they are flat.
<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">

I second that. I dont think there is some specific torqure needed. It also depends on the state of the bulkhead wood. If its rot then just tight it slightly or replace the plywood.
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Kim Luckner
1st Mate

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USA
99 Posts
Response Posted - 10/30/2011 :  15:35:19  Show Profile
Aaron,

I think these fasteners are in shear primarily, so torque is not a major concern, if I remember correctly this is a through bolted location. As has been suggested, tight so there is no side motion is good enough, I'd recommend a thread locker (loctite) to make sure the fastener assembly stays snug. I would visually inspect the hole in the chain plate to make sure it's not oval which would suggest problems with the plate. Also look for any cracks or notches in the plate which obviously would lead to failure.

FYI fastener torque is really important for tension or compression loads on the fastener axis, less so otherwise.
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aaron
Deckhand

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USA
23 Posts
Response Posted - 10/30/2011 :  21:38:24  Show Profile
Thanks for the feedback. I got around to rebedding them today. Once I actually loosened the nuts, I realized how little is actually going on with them. Pretty simple. Previous bedding was silicone, and removing it from the non-skid was by far the longest part of the job.
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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.