Association Forum - Time to replace the Sheaves?

Assn Members Area · Join

Home.

Association Forum

Ships Store

Cruising

Racing

Technical Tips

Photo Gallery - New

Boat Search - Updated

Manuals & Brochures

Swap Meet

Links

Officer Flag Line & Staff

Bylaws & Constitution

Members Area

Join the Association

Notice:
The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.

Association Forum

Username:	Password:
Save Password
Forgot your Password?

All Forums

Catalina/Capri 25/250 Sailor's Forums

Catalina 250 Specific Forum

Time to replace the Sheaves?

New Topic

Reply to Topic

Printer Friendly

Author

Topic

k3fuller
1st Mate

Member Avatar

USA
73 Posts

Initially Posted - 02/18/2020 : 15:29:07

I'm getting ready to put the boat back in the water and have the mast down. While replacing the anchor light and doing a masthead inspection the halyard sheaves looked a little wonky. I figured they were original 2004 vintage. Being inexpensive I decided to replace them. Having gotten them out today and replaced with new ones today I think it was probably a good decision.

https://drive.google.com/file/d/1YHvCDjLil0pdweT7-Od7hhlzQca1GazP/view?usp=sharing

https://drive.google.com/file/d/1YNT1RtpQIzJOa96l615E8bjA_JR4-jyC/view?usp=sharing

https://drive.google.com/file/d/1YFnve__EXAAkaajgm-nMoqzz_yiyNhlr/view?usp=sharing

2004 250WB #781

islander
Master Marine Consultant

Members Avatar

USA
3992 Posts

Response Posted - 02/18/2020 : 16:21:17

Those white sheaves Catalina used would crack,craze and crumble from UV damage. The same on the C25. I believe the black replacement sheaves are better. Looks like you caught those just in time. Mine were in worse condition.

Scott-"IMPULSE"87'C25/SR/WK/Din.#5688
Sailing out of Glen Cove,L.I Sound

Edited by - islander on 02/18/2020 16:22:16

Stinkpotter
Master Marine Consultant

Members Avatar

Djibouti
9013 Posts

Response Posted - 02/18/2020 : 22:00:05

Agreed. A basic rule of thumb is white and clear plastics are more susceptible to UV damage than black, which contains carbon that (counter-intuitively) somehow protects it. I've seen that demonstrated in everything from sheaves to pipes. My 15 year-old original-equipment white masthead sheaves were crumbling.

Dave Bristle
Association "Port Captain" for Mystic/Stonington CT
PO of 1985 C-25 SR/FK #5032 Passage, USCG "sixpack" (expired),
Now on Eastern 27 $+!nkp*+ Sarge

Russ.Johnson
Commodore

Members Avatar

USA
833 Posts

Response Posted - 02/20/2020 : 21:41:36

Kemp,

Thanks for the photos, I'll check my sheaves.
A few years ago, I had my mast down and noticed the masthead casting had rough spots where the halyard exit the sheave.
The halyard was getting chafed and it took me awhile to find it.
Since our boats are close in age, I was wondering if you had the same problem.

Russ Johnson
2005 C250WB Hull 793

k3fuller
1st Mate

Members Avatar

USA
73 Posts

Response Posted - 02/21/2020 : 13:34:48

Hi! I have not noticed any issues at the mast head with Chafe but I will double check before I put the mast up tomorrow. I have some outside damage from the cotter pin holding the clevis pin in, the sheave must not have been rolling ON the pin but rolling THE pin lol. Hope it's all fixed now. If I see anything at the mast head I'll take a picture and post it.

Stinkpotter
Master Marine Consultant

Members Avatar

Djibouti
9013 Posts

Response Posted - 02/21/2020 : 15:22:31

quote:
Originally posted by k3fuller

...I have some outside damage from the cotter pin holding the clevis pin in, the sheave must not have been rolling ON the pin but rolling THE pin...

That would suggest a lot of friction. A more common and worrisome problem is the clevis pin being galled into the mast-head casting and requiring some (gentle) use of a hammer to pop it out, hopefully without breaking the casting. Sounds like that was not your case.

Dave Bristle
Association "Port Captain" for Mystic/Stonington CT
PO of 1985 C-25 SR/FK #5032 Passage, USCG "sixpack" (expired),
Now on Eastern 27 $+!nkp*+ Sarge

k3fuller
1st Mate

Members Avatar

USA
73 Posts

Response Posted - 02/22/2020 : 17:29:36

Russ - I inspected the masthead and yes, catalina did a poor job finishing the casting where the halyards exit. The sheave for the main halyard extends out far enough that there is a fair amount of clearance and it won't touch the masthead. But on the Jib side, the sheave is more 'inside' and the masthead is basically like a knife edge extrusion (Pic below). I'm really glad you said something, it's a small but important detail. If I had a hank on it would probably be fine because the halyard would be held more forward but with the furler and the halyard restrainer that effectively pulls the halyard against the masthead and right across this knife edge. I then examined the jib halyard and I have damage where it exited the mast and was chafing. The halyard is new last season so it's not a lot of damage but is clearly there. I took a dremel tool and ground the masthead so that it was smooth. That should make things better but I'm going to add it to the list of things to check periodically. Thanks much!!!!

https://drive.google.com/open?id=1_0c0Tym7YMnlEaccYf0MJrI2DZkcerZB

2004 250WB #781

Russ.Johnson
Commodore

Members Avatar

USA
833 Posts

Response Posted - 02/23/2020 : 09:21:09

Kemp,

I'm glad I could help.
Since our boats are 12 numbers apart, I thought we might have the same issues.
I did notice your casting was rough on the base, but mine was rough on the sides.
I'll post some photos next time I'm at the boat.

Thanks, Russ

Russ Johnson
2005 C250WB Hull 793

Russ.Johnson
Commodore

Members Avatar

USA
833 Posts

Response Posted - 03/03/2020 : 16:07:04

Kemp,

I copied your sheave photos (hull 781)

Sheave1

Sheave2

Sheave3

Russ Johnson
2005 C250WB Hull 793

Russ.Johnson
Commodore

Members Avatar

USA
833 Posts

Response Posted - 03/03/2020 : 16:08:12

Kemp,

Here's your masthead photo (hull 781)

Here's my masthead photo (hull 793)
I filed the casting on both the left and right side.
Notice the area to the left of the halyard.

Russ Johnson
2005 C250WB Hull 793

Edited by - Russ.Johnson on 03/03/2020 16:30:55

Russ.Johnson
Commodore

Members Avatar

USA
833 Posts

Response Posted - 03/03/2020 : 16:29:30

Kemp,

I just noticed on your masthead photo, is you forestay connected to the upper or lower pin?

Here's a wider photo of my masthead

Here's the diagram from the owners manual.

http://www.catalina-capri-25s.org/manbro/pictures/m25013.gif

Russ Johnson
2005 C250WB Hull 793

k3fuller
1st Mate

Members Avatar

USA
73 Posts

Response Posted - 03/03/2020 : 19:44:32

Hi! I wish I knew how to post photo's here, I can't find any instructions. You sure did cut that back! I didn't have all that far to go. The forestay is connected to the lower in the correct area and the spinnaker one is unused. :- )

2004 250WB #781

Russ.Johnson
Commodore

Members Avatar

USA
833 Posts

Response Posted - 03/03/2020 : 21:49:48

Kemp,

I agree, I didn't know how soft that cast aluminum could be.
I did remove more than I needed.

To post photos, I see you are a paid association member.
Please login to the Members Area and select Upload Image from the menu.
Then follow the instruction to "Post an Image to the Forum".
There is also an Instructions page from the menu.
Note: It takes some practice.

Please let me know if you have any questions.
Russ

Russ Johnson
2005 C250WB Hull 793

Edited by - Russ.Johnson on 03/03/2020 22:00:03

Topic

New Topic

Reply to Topic

Printer Friendly

Jump To:

Association Forum

Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.