pavedwave longboarding

scooterdad · Posted: Sat Feb 21, 2009 8:04 am Post subject:

Angelo, I see you posted this a while ago, but I have been getting major kingpin nut loosening to the point of almost falling off. His happens after 10 miles or so. I tried switching to a new nut as the old(one month) one I had seemed to have lost most of the plastic type lock. I had been taking it off often to check/play around with different bushong combos.

So I replaced the nut and same thing. I just checked 15 miles into the ride today because it felt a little loose. It was just a turn or so from falling completey off! The plastic lock still looked in decent shape. So, I don't know if it is terrain or riding style. My two riding buddies had no issues when I asked them to check. We did go over a couple slightly grooved concrete bridges that coils loosen fillings but I don't know why it would only affect me. It worries me a little because it wouldn't be fun having that pop off at speed would it?

pavedwave · Joined: 22 Oct 2007 Posts: 1120 Location: seattle wa usa

Is that with a stock kingpin or a replaced one? Only thing I can imagine other than crummy nylock, is if it was a replacement pin that is slowly turning a little in the baseplate. Have you tried flipping the nut over and screwing it down with the flat side up? I've done that when the nylock was almost gone and it helped extend the life of the nut. But I haven't run into this problem for a long time.

Other than that, the only long-term solution I'd say would be to file grooves in the very end threads of that kingpin, and try to find a big C-clip to snap around it.

scooterdad · Posted: Sat Feb 21, 2009 8:33 am Post subject:

It happened with the stock kingpin and now with the Randal (per Barry's excellent photographic tutorial). I doubt the replacement pin is turning in the baseplate with the locktite and the degree of difficulty for me getting it wedged in there, but I guess that is possible.

One thing I did notice is that with the Randal that I cut down slightly, it bit into some of the plastic on the nut the first time I put it on. Since then, I gently filed down the top of the kinpin slightly so it isn't as sharp, so I will try again with a brand new nylock. It could just be a combination of several things. I did check my new bushings after 20 miles today(longest ride after the kingpin replacement), and they look pristine. I am very happy so far with the kingpin mod.

Belegnole · Joined: 23 Jul 2008 Posts: 86 Location: Appleton, Wisconsin

locktite thread locker...maybe the medium
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scooterdad · Posted: Sat Feb 21, 2009 8:43 am Post subject:

I used that in the baseplate securing the bolt, but you're saying put it on the locknut as well? Will that make it hard to remove to change/adjust bushings?

Belegnole · Joined: 23 Jul 2008 Posts: 86 Location: Appleton, Wisconsin

well there are quite a few variants from loctite. Twenty eight just for thread locking. I was thinking that if your nuts keep wanting to fall off. you should see a doctor. Short of that loctite can reduce the loosening or stop the removal all together. One that stuck out was ...

timbo666 · Joined: 30 Aug 2009 Posts: 21 Location: Coventry - England