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12-26-2016, 03:37 PM
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Join Date: Mar 2006
Location: Newport, TN
Posts: 7,496
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WD-630-1 Nose Wheel Fork... Cracks in the Welds
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12-26-2016, 03:58 PM
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Join Date: Jun 2007
Location: palm coast fl.
Posts: 945
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CRacks
Wow ! Good find . Curious from one of the welding pros on what caused this
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12-26-2016, 04:00 PM
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VAF Moderator
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Join Date: Jan 2005
Location: Pine Junction, CO
Posts: 655
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Darn, I first though there is now way this could crack but after looking at the rest of the pictures I agree it looks like the weld is cracked. Time to call Vans on Tuesday. Gonna check mine too!
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Gary "Seismo" Zilik
Pine Junction, Colorado
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12-26-2016, 05:07 PM
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Join Date: May 2005
Location: Concho, Arizona
Posts: 177
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There was an SB on checking for cracks in nose wheel forks some time ago. However that SB is not about cracks in the weld but cracks at the bend. Not sure if this pertains to the later version, but a good idea to check anyway. Read here:
https://www.vansaircraft.com/pdf/sb96-09-1.pdf
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12-26-2016, 06:47 PM
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Join Date: Oct 2006
Location: TX
Posts: 53
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Cracks in the weld
What I see here is typical embrittlement of filler rod vs the base metal. It's common when the filler rod and base metal have different numbers. It's kinda like trying to weld 2024-T3. My suggestion is taking it to an experienced aluminum TIG welder and have it rewelded using 5606 filler rod with a lot of heat on a square wave machine. I would bet Rick Robbins of Robbins Wings could rewelded it and not crack again. Vetterman
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12-27-2016, 07:26 AM
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Join Date: Mar 2006
Location: Newport, TN
Posts: 7,496
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He is calling Van's today to inform them. I think he is planning to purchase a new fork to get back in the air.
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12-27-2016, 06:44 PM
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Join Date: Mar 2006
Location: Newport, TN
Posts: 7,496
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He has a new one on the way. Van's requested he mail this one back to them for an investigation....
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12-27-2016, 07:46 PM
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Join Date: Mar 2007
Location: Sonoma County
Posts: 3,821
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Cracks down each side of every weld???
I do expect it to be something other than cracks.
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12-27-2016, 08:31 PM
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Join Date: Jun 2012
Location: Frederick, MD
Posts: 821
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Anyone run a dye check on it to see if they are actually cracks?
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Dan Morris
Frederick, MD
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12-28-2016, 05:47 AM
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Join Date: Mar 2006
Location: Newport, TN
Posts: 7,496
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Quote:
Originally Posted by gasman
Cracks down each side of every weld???
I do expect it to be something other than cracks.
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Quote:
Originally Posted by RVDan
Anyone run a dye check on it to see if they are actually cracks?
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This can be a common issue if the wrong filler rod was used. Larry commented on that above and other examples are out there on the web.
These are not traditional fatigue cracks that normally would run right down the middle.
Maybe Van's will post their results after they do their dissection....
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