mast head sheave issue

   the wire halyard on my carbon contender mast keeps slipping down the side of the sheave becoming so trapped it's impossible to move it.  Yesterday I replaced the plastic sheavew with a new one but the same thing happened straight away.  I have a metal sheave, is that the answer?  The masthead fitting itself is plastic.  Should I give up and switch to a rope halyard instead?  If so I will have to fit a cleat and the rack for the wire will be in the way.

What is the answer?

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winging it Send Private Message Find Member's Posts Really should get out more Joined: 22 Mar 07 Online Status: Offline Posts: 3958	Post Options Post Reply Quote winging it Report Post Quote Reply Topic: mast head sheave issue Posted: 10 Jul 13 at 7:52pm
	the wire halyard on my carbon contender mast keeps slipping down the side of the sheave becoming so trapped it's impossible to move it. Yesterday I replaced the plastic sheavew with a new one but the same thing happened straight away. I have a metal sheave, is that the answer? The masthead fitting itself is plastic. Should I give up and switch to a rope halyard instead? If so I will have to fit a cleat and the rack for the wire will be in the way. What is the answer?
	the same, but different...

PeterG Send Private Message Find Member's Posts Really should get out more Joined: 12 Jan 08 Location: United Kingdom Online Status: Offline Posts: 822	Post Options Post Reply Quote PeterG Report Post Quote Reply Posted: 10 Jul 13 at 8:58pm
	Sound like the slot in the fitting is too wide? Or the sheave is too narrow? (OK that's probably bleedin' obvious!). It's a problem I've never had on both a metal and carbon mast with a wire halyard. How hard would it be to replace the whole fitting? Pretty easy I remember on a metal one, but no experience on a carbon stick. A rope halyard might help a little, but only if you use a diameter larger than the wire - then again it might just jam too!. Edited by PeterG - 10 Jul 13 at 8:58pm
	Peter Ex Cont 707 Ex Laser 189635 DY 59

winging it Send Private Message Find Member's Posts Really should get out more Joined: 22 Mar 07 Online Status: Offline Posts: 3958	Post Options Post Reply Quote winging it Report Post Quote Reply Posted: 10 Jul 13 at 10:07pm
	the sheave is the right size, but the halyard wire is really thin. Maybe I should change that first?
	the same, but different...

Ian29937 Send Private Message Find Member's Posts Far too distracted from work Joined: 25 May 05 Online Status: Offline Posts: 409	Post Options Post Reply Quote Ian29937 Report Post Quote Reply Posted: 11 Jul 13 at 10:38am
	Try using a bolt rather than a pin as this could provide more support to the sides of the sheave stopping them from deforming and allowing the wire to go down the side. You could even add some penny washers......

winging it Send Private Message Find Member's Posts Really should get out more Joined: 22 Mar 07 Online Status: Offline Posts: 3958	Post Options Post Reply Quote winging it Report Post Quote Reply Posted: 11 Jul 13 at 10:42am
	ah! I have the penny washers! Good thinking about the bolt!
	the same, but different...