If the 29 is like the 30, then the whole top of the mast (aluminum casting)
comes off - it rests on the top of the mast, but the casting goes down inside
of the mast. The sheaves are in the top piece, and you must take it off to get
the sheave axles out. Mine is secured with about 8 stainless screws, evenly
spaced around the casting. It is a tight fit, it took some prying with small
pry bars to get it out.
I agree - I think the 29 is keel stepped and if so, keeping the lowers in place
and using the pole topping lift can hold the mast in place while you work on
the top. But, your crane must hold you up there without any help from halyards
and such, as they are all attached to or through the top casting.
Gary
----- Original Message -----
From: Tim Goodyear via CnC-List
To: Bev Parslow ; cnc-list@cnc-list.com
Sent: Sunday, September 21, 2014 10:08 PM
Subject: Re: Stus-List c and c 29-2 mast cap.
On the 35-3, you would not have to affect the standing rigging to change a
sheave. It should be possible from a bosun's chair (at the crane or on other
halyards). I would suggest going up to check what it looks like before
gathering the right tools and planning the job. On the 35-3, the sheaves are
rigged similar to those on the boom. There is a stainless cover over one end
of the sheave axle. When that is removed, you should be able to push the axle
out and remove the sheave (holding it as others suggested). Yours may be
different, but it may not be necessary to remove the mast cap.
Tim
Mojito
35-3 Branford, CT
On Sep 21, 2014, at 7:14 PM, Bev Parslow via CnC-List <cnc-list@cnc-list.com>
wrote:
We have a mast tower at the club. The main sheave needs to be replaced. Can
we take off the cap at the mast tower and avoid hauling out the mast for the
replacement?
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