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Boom Goose Neck Connection

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Samtutuki View Drop Down
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    Posted: 12 January 2015 at 10:44
I am the owner of a new Hanse 445, hull number 219, and have had this vessel for about 6 months.

My boat has a Selden rig and the boom is a B250 extrusion.

I recently noticed a lot of knocking and squeaking coming from the boom when running off the wind. Upon investigation there were a number of issues that noticed.  

The subject of this post is the clevis pin that passes through the in board boom end fitting to attach it to the gooseneck (mast fitting). I will post separately the other things I noticed.

This clevis pin has a D head i.e. a flat on the head of the clevis pin.  On the in board boom end fitting there is a corresponding moulding in the casting to match the flat on the head of the clevis pin presumably to stop the clevis pin rotating.  

What I observed was that inspite of this flat, the clevis pin has rotated, damaging the casting as you can see in the attached picture.

  
On the other side of the boom you can see that the split pin has been bent closed by the rotation of the clevis pin forcing the split pin against the moulded recess in the boom fitting.



I know of another Hanse 445 in Australia with this exact same issue. So my questions are:

1. Has anyone else observed this?
2. Does anyone have any idea why the clevis pin is rotating?
3. Does anyone have any idea why Selden should want to stop the clevis pin from rotating?
4. Does anyone have a proven workable solution?

My concern is that left un-corrected the split pin could fall out followed by the clevis pin with potentially dangerous consequences.

Thanks in advance.

Regards.
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Brufan View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brufan Quote  Post ReplyReply Direct Link To This Post Posted: 12 January 2015 at 12:46
I also have a Selden boom (a bit smaller indeed).
Clevis pin is not turning on mine 
I cannot understand how it can turn providing its length is the right one and it can't "exit" the casting.
Very strange.
May be you can lubricate clevis pin where it passes through mast fitting in order to avoid any friction there.  May be sand and polish both parts.
Bruno

hanse 355 - 57

S/Y Spicy Ginger

White hull, 2 cabins, Volvo D1-30, Selden rig, removable mainsheet track system (modifications done now), Simrad-Jefa autopilot.
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panos View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote panos Quote  Post ReplyReply Direct Link To This Post Posted: 12 January 2015 at 17:22
Judging from the picture, the clevis pin has not been properly secured (by bending the two split-pin ends around the main body).
Panos

Hanse 630e - selling her -
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hanafe View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote hanafe Quote  Post ReplyReply Direct Link To This Post Posted: 12 January 2015 at 23:17
the pin you are describing of my spar craft rigg was bend during our 2000 miles tour from HKG to Phuket, most likely due to the heavy winds we had for 5 days. Up to 40 knots, max speed 18.2 knots surfing down the waves.
My pin was just bend and did not chafe anything at the fitting. We just had to replace the pin with a new one.
The pin is differently secured than on your picture. There are screws on each side to hold the pin in position.

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Samtutuki View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Samtutuki Quote  Post ReplyReply Direct Link To This Post Posted: 13 January 2015 at 03:14
Thanks Hanafe. Which pin are you referring to? The clevis pin or the split pin.
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Samtutuki View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Samtutuki Quote  Post ReplyReply Direct Link To This Post Posted: 13 January 2015 at 03:15
Thanks Panos. Yes from my experience with motor vehicles the split pin should be bent around the clevis pin but as you can see from the picture, the Selden casting is not moulded in that way to permit such a bending.
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pideas View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote pideas Quote  Post ReplyReply Direct Link To This Post Posted: 13 January 2015 at 07:00
I have the same problem. until the third season.
I'm going there in the spring clean and lubricate with try.
hanafe
I think you have a sparcraft rig and a different design ?!
Sailing is a Passion, ex Hanse 445, now Moody DS 54



H445#74
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panos View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote panos Quote  Post ReplyReply Direct Link To This Post Posted: 13 January 2015 at 07:09
Originally posted by Samtutuki Samtutuki wrote:

Thanks Panos. Yes from my experience with motor vehicles the split pin should be bent around the clevis pin but as you can see from the picture, the Selden casting is not moulded in that way to permit such a bending.


It has place if you slide in the split pin from down to up and start to bent the two ends with a set of pointy pliers, pulling the split pin up in the process.

Panos



Edited by panos - 13 January 2015 at 07:14
Panos

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Samtutuki View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Samtutuki Quote  Post ReplyReply Direct Link To This Post Posted: 13 January 2015 at 08:57
Thanks Panos - I like your thinking - thinking outside the square!!  I don't really understand why Selden cast that recess in there fittings. If the split pins are inserted and wrapped around the clevis pin as you suggest I suspect there is very little chance of chaff or snagging of lines. And what is so wrong with a clevis pin rotating anyway?
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Samtutuki View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Samtutuki Quote  Post ReplyReply Direct Link To This Post Posted: 13 January 2015 at 08:59
You might like to try this product as a lubricant which I have used previously. I am going to apply to my fitting as soon as I can get to it.



Edited by Samtutuki - 13 January 2015 at 09:02
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