Replacing reefing line sheeves on a 1983 Beneteau First 38

[Michael Davis]

. I fear there may be a nut underneath t

I've re-done the head liner in the aft cabin of ours, Juan. The only bolts I remember are for the main sheet winch. Are they screws or bolts?

 

[JuanMarcos]

They are screws, and the fairleads are right beside the saloon hatch. The sheaves are held in place by flat head screws about 3 in. long.

 

[Michael Davis]

The sheaves are held in place by flat head screws about 3 in. long.

I think I would fill the hole with thickened epoxy, redrill and put the screw back in. There may be better ideas out there. Check that there is not some water logged core material that needs removing.

 

[AlaskanDan]

Hi Marcos,
If memory serves, for the boom end they used the same system as for the masthead, that is the sheaves are mounted on a common axel that slides on a V shape groove from the open end of the the sheave box. I dealt with the masthead a few moths back, and ended up making custom sheaves as nothing I could find felt acceptable. I documented my process here
Restoring Canis: Episode 2…

All the best,
Alejandro
Alejandro

Alejandro,
I watched your video and saw that you drafted the CNC file for the sheave profiling tool. I have numerous sheaves that I need to replace and can’t find any locally up here in Alaska, but I do have access to a lathe. Is there any way I can obtain the CNC file for the HSS tool you created (I’d be happy to discuss compensation for your time drafting the file)? I have an 85 Idylle 11.50 that I believe uses the same (or close to) running rigging components.

Thanks,
Dan

 

[Benny35]

Hi Marcos,
If memory serves, for the boom end they used the same system as for the masthead, that is the sheaves are mounted on a common axel that slides on a V shape groove from the open end of the the sheave box. I dealt with the masthead a few moths back, and ended up making custom sheaves as nothing I could find felt acceptable. I documented my process here
Restoring Canis: Episode 2

Gerhauer makes sheaves of the right width, but the finishing was disappointing and the edges had often sharp edges sure to damage the lines. I used bronze bushings but I think that is a bit of an overkill, a machine shop should be able to make custom sheaves at a reasonable cost. Alternative Zephyrwerks makes custom sheaves I think they make a superb product (although a bit pricey).
All the best,
Alejandro
Alejandro

@Alejandro, what is the process for removing the top of the mast. Your image was extremely helpful, as I can presumably see what I will be looking at if I can do so, but I am considering doing this while aloft vs. incurring the expense of derigging. Any thoughts/tips on this?