Seized gooseneck

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Cardinal

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My gooseneck fitting has seized up. I have never dismantled it so before I try to apply inordinate force to it I wonder if the forum could please clarify for me exactly how this fitting should dismantle.
I believe that the vertical pin should rotate freely as the boom swings, encouraged by the horizontal pin (removed in my pictures).
I have loosened the small retaining nut on the bottom of the vertical pin.
I have managed to turn the vertical pin only a mm or so with a vicegrip clamped around the bit which protrudes above the aluminium bracket.
Should I apply heat to the aluminium bracket?
Any advice will be gratefully received.
 

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It is I think a classic case of ali to ss corrosion or in the case of the horizontal axle ali on ali corrosion. You could force the movement at the risk of breaking the ali casting. Yes heat is the best bet to break the corrosion grip. Try boiling water or a small gas flame. There are also various penetrating fluids that may also help if you can get it to migrate into the joint. good luck ol'will
 
The old WD 40, heat, spray and repeat may work well. Otherwise get some automatic transmission fluid and brush that on a couple of times, takes a bit more patience but that stuff works magic with frozen bolts/fittings/shafts and perhaps also goosenecks.
 
I would expect the vertical pin with the hooks to 'lift out' which would then allow removal of the boom. If it has a bit of movement I would keep working on increasing the movement until you can get the pin out.
There was a few years ago some talk about using acetone with a very light oil mixed in as it allowed the oil to penetrate better into seized fittings.
 
Lift the boom up & down a few times should break the corision between pin & claw & you should be able to remove the boom with the aild of suitable lubricant mentioned above.
then you have to work n the pin. Clean up the exposed surfaces on it first so if you do get it moving it does not jam
 
I'd drill out the rivets and remove the whole lot, it would be much easier to work with off the mast. Riveting the goosneck back on with the boom removed is a 10 minute job once it is off.

After removing the gooseneck/boom and taking it home I'd probably fill an ice cream tub with something like automatic transmission fluid and leave the gooseneck immersed for a few days. Finally turn it upside down and support the aluminium part on a block of wood, heat it with a heat gun and try driving the pin out with a hammer, while also trying to rotate it a bit as you already did

. As mentioned, the main risk is snaping the ali casting so if it doesn't go don't get too violent, just repeat again and again.

You say you've got a mm of movement, the most difficult part is typically getting any movement at all. As soon as you get some movement go back the opposite direction not to jam it all up, then try again and you usually get slightly more movement each time... as long as you don't go crazy the battle is won as soon as it moves even slightly. If it is really moving I don't imagine it will be too hard.
 
Loosten the nut but leave it on the bolt. Squirt release spray in the hole and around the pin.

Tap the bolt up from the bottom then back down from the top. Keep repeating (up down up down) and it will start to loosten.
 
There should be a pin or split ring through a hole in the vertical shaft, below the lower web of the casting which must be removed before the shaft is driven upwards. As mentioned, applying a release fluid should be done before trying extraction. From a look at the photos i think that I can see a crack in the allow casting but it may only be a mould mark.
 
Thanks all for your interest and helpful suggestions. I shall try with boiling water taking the sort of precaution against burning suggested, but if that fails, I may be tempted to remove from the mast and take away to work on. As you will have noticed from my pics, the boom end fitting has suffered and the ally will need to be welded and perhaps an SS sleeve fitted to keep the joint tight so removal will be required anyway.
 
Blueboatman said:
Just boil a kettle and wriggle it whilst pouring
And don’t burn yourself with splashing water
And repeat
Click to expand...
Yes yes yes.

Copius amounts of boiling water for all seized UK by salty environment stuff

Many kettles of boiling water poured will dissolve the salty detriius and free it.

It's been discussed on here before and there are many doubters.

It's a cheap easy trick that often works.

WHAT HAVE YOU GOT TO LOSE BY TRYING IT?
 
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