Hi Larry,

Let me give you a more detailed description of what I did with the mast
top fitting.

The Dwyer fitting has much smaller sheaves than my old fitting had, so
from my point of view, I wanted the larger sheaves, plus the ability of
pulling the sheaves by removing a ring and pulling the clevis pin -
goodness as far as I was concerned.

When I took my original mast top fitting and tried it on the Dwyer mast,
the geometry of the part fitting into the mast was wrong.

So, cut off the top portion (with the sheaves) from the Dwyer fitting. 
This fitting had rivets instead of clevis pins, so that was no way of
taking it apart.

Cut off the part that fits into the mast from the original fitting.  This
give you the top portion with the sheaves.
The Dwyer fitting was cut where the sheaves were, leaving you the lower
part that fits into the Dwyer mast profile

Place parts in vise and file until you generate flat surfaces so that the
two parts can be fitted together.

I then drilled and tapped  two 1/4 - 20 holes and fastened the two pieces
together.

Then, I noticed that the original forward sheave was too far back and the
halyard didn't lead fairly.  It  
scraped at the edge of the fitting.

Can't have that, so take it all apart again, and now drill a new clevis
pin hole about 1X diameter further forward - I think I used as much space
as I had available.

Now the main halyard leaves the sheave on the forward side of the mast
and doesn't rub on anything.

Is this clear?  If not yell!

Connie

 

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