Loose shackle pins

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Donk107
Donk107
TAS
2446 posts
TAS, 2446 posts
5 Oct 2015 12:06am
Hi all

The last two times i went for a sail i had a couple of failures happen

The first was the shackle that holds the topping lift (fixed length wire on mine) to the end of the boom disappeared and the last one was when i did a gybe and the pin in the shackle that holds the main sheet block to the boom fell out as i was pulling the boom across with the main sheet resulting in the boom slamming forwards into the the rearmost shroud

Both of these were fixed on the run with new shackles i had on board but today i decided to check the tightness of the pins on the remaining ones and around four of them were at least a turn loose and one had a bent pin

I have probably been a bit slack on maintenance and in future i will check them every couple of months to make sure that nothing is going to let go

Regards Don
Ramona
Ramona
NSW
7757 posts
NSW, 7757 posts
5 Oct 2015 8:47am
Some of these shackles should be the type with the toggle pin and clip, especially in the rigging and boom fittings.
Toph
Toph
WA
1890 posts
WA, 1890 posts
5 Oct 2015 9:29am
And failing that, a drop of loctite might do the trick. But I often put a small cable tie through the hole in the pin and around the shackle. Yes they deteriate over time, but it is rather obvious to spot.

Donk107
Donk107
TAS
2446 posts
TAS, 2446 posts
5 Oct 2015 5:57pm
Hi all

Thanks for the advise so far

I have lots of different types on mine and quite a few of this type

Until I put a screwdriver on them it wasn't all that obvious that they were a turn loose

to to be honest I haven't got a lot of faith in the straight pin with the split ring

Regards Don




Ramona
Ramona
NSW
7757 posts
NSW, 7757 posts
5 Oct 2015 6:07pm
The top picture of Rumblefish's is the one to use. The pin is usually thicker and does not have the stresser of the thread to weaken it.

Remember a couple of weeks ago writing about my mates halyard landing on the deck. It was a screwed shackle that undid itself! And he climbs the mast regularly on screwed shackles!
sirgallivant
sirgallivant
NSW
1531 posts
NSW, 1531 posts
8 Oct 2015 8:51am
Second time l sailed my boat after buying it, but before going over it with a critical eye, the same thing happened. The boom and main-block detached itself.
The best time, the best place, 25kn winds 10 feet seas comind out of Mollolabah...
So l bought a 2mm cobalt drill bit and a roll of thin ss wire and drilled a hole into every shackle-pin head aboard a 2mm hole and tied it with ss wire.
Problem sold forever.

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