Mast head sheave jam recurring...

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Mast head sheave jam recurring...

Postby hnash53 » Wed Sep 07, 2016 6:38 pm

The mast head keeps jamming with the halyard cable AFTER I have stepped it :( and then I have to unstep and restep... pita.
Below are some pics of the sheaves/head.... Does it appear to be overly worn and in need of replacement? Or perhaps just the sheaves?

I have a DS2 1976.

Thanks.

Hal
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hnash53
 
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Location: Waldport, Oregon

Re: Mast head sheave jam recurring...

Postby Shagbark » Wed Sep 07, 2016 8:11 pm

Sheaves are cheap. Replace them first. While you're at it, replace the bolts and nuts holding them in with stainless steel.
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Re: Mast head sheave jam recurring...

Postby talbot » Thu Sep 08, 2016 1:30 am

Is that steel cable?
If so, you might consider replacing it with Dyneema or another modern fiber. Stronger, lighter, little stretch, can be attached with knots or splices, and runs very smoothly in the sheaves.
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Re: Mast head sheave jam recurring...

Postby jeadstx » Thu Sep 08, 2016 2:46 am

When I replaced my halyards I switched to line for the full length on my 1976 DS II. No regrets doing that. Modern line doesn't stretch as much as when these boats were first built and you don't need the half line/half wire halyard.

I agree with Shagbark in replacing the bolts with stainless steel. D&R Marine sells the correct sheaves.

John
1976 Day Sailer II, #8075 - Completed the 2011, 2012, and 2013 Texas 200
1952 Beetle Boat Swan Catboat
Early Rhodes 19
1973 Mariner 2+2, #2607 - Completed 2014, 2015 and 2016 Texas 200
1969 Day Sailer I, #3229
Fleet 135; Canyon Lake, Texas
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Re: Mast head sheave jam recurring...

Postby hnash53 » Thu Sep 08, 2016 12:27 pm

talbot wrote:Is that steel cable?
If so, you might consider replacing it with Dyneema or another modern fiber. Stronger, lighter, little stretch, can be attached with knots or splices, and runs very smoothly in the sheaves.


What size line/dyneema goes well in these halyards?

BTW...I see that you are in Eugene... I'm in Waldport and sail mostly in Alsea Bay.
hnash53
 
Posts: 20
Joined: Wed Aug 17, 2016 5:19 pm
Location: Waldport, Oregon

Re: Mast head sheave jam recurring...

Postby jeadstx » Fri Sep 09, 2016 1:10 am

Halyards are usually 1/4" line.

John
1976 Day Sailer II, #8075 - Completed the 2011, 2012, and 2013 Texas 200
1952 Beetle Boat Swan Catboat
Early Rhodes 19
1973 Mariner 2+2, #2607 - Completed 2014, 2015 and 2016 Texas 200
1969 Day Sailer I, #3229
Fleet 135; Canyon Lake, Texas
jeadstx
 
Posts: 1216
Joined: Tue Jul 08, 2008 11:10 am
Location: Dripping Springs, Tx

Re: Mast head sheave jam recurring...

Postby GreenLake » Fri Sep 09, 2016 4:54 am

1/4" is a bit stronger than necessary for Dyneema....

I've been using 3/16" for several years now. See my writeup.
~ green ~ lake ~ ~
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