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How to fix Kadee coupler trip pins from rotating

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How to fix Kadee coupler trip pins from rotating
Posted by Old.Professor on Wednesday, February 26, 2020 12:51 PM

I have some cars with Kadee couples where the trip pin rotates freely in the "shaft" or "back" of the knuckle it is supposed to open. Is there any way to fix this? I thought of putting a drop of supper glue on the trip pin, but am afraid that it would just make the whole coupler a solid dummy.

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Posted by SROC99 on Wednesday, February 26, 2020 1:35 PM

If the trip pins are loose you need to replace the coupler. The pins have a knurled end to hold it firmly in the knuckle. If the pin is loose means the interior of the knuckle is damaged. I wouldn't advise trying to glue the pins.

Sam Clarke R&D Kadee Quality Products

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Posted by mbinsewi on Wednesday, February 26, 2020 1:37 PM

I would say if your using some type of uncoupling device, the pin is probably supposed to be in a certain position for operation.

You better check that out first.

Mike.

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Posted by SeeYou190 on Wednesday, February 26, 2020 3:55 PM

Old.Professor
I have some cars with Kadee couples where the trip pin rotates freely in the "shaft" or "back" of the knuckle it is supposed to open. Is there any way to fix this?

SROC99
If the trip pins are loose you need to replace the coupler. The pins have a knurled end to hold it firmly in the knuckle. If the pin is loose means the interior of the knuckle is damaged.

Sam is the man... replace the coupler. I have never had this happen to me.

-Kevin

Wink Happily modeling my STRATTON & GILLETTE RAILROAD. A Class A line located in a personal fantasy world of semi-plausible nonsense on Tuesday, August 3rd, 1954.

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Posted by Southgate on Wednesday, February 26, 2020 4:01 PM

Some people just cut those off. If you use magnetic uncoupling, and are going to replace them, the "whisker" couplers from Kadee work better than #5, especially with delayed uncoupling.  Dan

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Posted by gmpullman on Wednesday, February 26, 2020 4:01 PM

SeeYou190
Sam is the man... replace the coupler. I have never had this happen to me. -Kevin

I've never had it happen to a Kadee product, either. I wonder if the OP has an inferior coupler and mis-identified it as a Kadee?

Good Luck, Ed

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Posted by doctorwayne on Wednesday, February 26, 2020 4:33 PM

gmpullman
I've never had it happen to a Kadee product, either. I wonder if the OP has an inferior coupler and mis-identified it as a Kadee?

I don't think so, Ed, as I've had a few Kadees with that issue.  In most cases, the trip pin was not properly seated, and pushing down on it where the cleft-end of it protrudes though the head of the coupler usually solves the problem.

I've been using Kadees since my first HO layout in the mid-'50s...K-type couplers, with mechanical remote uncoupling - in those days, we din use no steenkin' magnets. Smile, Wink & Grin

Wayne

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Posted by mlehman on Wednesday, February 26, 2020 4:37 PM

gmpullman
I've never had it happen to a Kadee product, either. I wonder if the OP has an inferior coupler and mis-identified it as a Kadee?

Depends on the Kadee. It's not uncommon with the 714 used on narrowgauge. It's an older design with two halves. Made of plastic, the pin presses into one half. I have had these start turning on ocassion when I didn't accurately press the pin into the hole right and wallowed out a larger then necessary hole.

However, if it's standard gauge HO, then a lot of the cheaper plastic couplers are prone to developing a similar problam like the 714. Replace with better.

Mike Lehman

Urbana, IL

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Posted by davidmurray on Wednesday, February 26, 2020 7:33 PM

KD says to replace it.  Therefore you have nothing to lose by adjust it to the right angle, pressing down like Dr Wayne said, then applying a small drop of CA.

Worthless now, at worst worthless after trying.  Good luck.

 

David Murray from Oshawa, Ontario Canada
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Posted by doctorwayne on Wednesday, February 26, 2020 8:09 PM

davidmurray
KD says to replace it. Therefore you have nothing to lose by adjust it to the right angle, pressing down like Dr Wayne said, then applying a small drop of CA.

Just to clarify things, all I do is press it down - no ca is applied.  If it works loose again, it gets replaced.

Wayne

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Posted by Eilif on Thursday, February 27, 2020 4:58 PM

doctorwayne

 

 
davidmurray
KD says to replace it. Therefore you have nothing to lose by adjust it to the right angle, pressing down like Dr Wayne said, then applying a small drop of CA.

 

Just to clarify things, all I do is press it down - no ca is applied.  If it works loose again, it gets replaced.

Wayne

 

doctorwayne

 

 
davidmurray
KD says to replace it. Therefore you have nothing to lose by adjust it to the right angle, pressing down like Dr Wayne said, then applying a small drop of CA.

 

Just to clarify things, all I do is press it down - no ca is applied.  If it works loose again, it gets replaced.

Wayne

 

If it works loose again, perhaps give the top end of the arm a strong crimp?  Just enough to widen the head a bit, then push it back in.

Additionally, I don't see why adding a drop of gel superglue would be a bad thing.   Apply it carefully where you want it with a toothpick.  Not much danger of it dripping into the works and if you're worried about that you can always flip it upside down while it dries.   

If it works you're good to go, if not you can always replace it at that point.  I certainly wouldn't replace a loose KD (assuming other methods don't work) without trying glue. 

If anyone has any loose-arm KD's they don't want to glue, I'll pay for the stamp to mail them here....

Visit the Chicago Valley Railroad for Chicago Trainspotting and Budget Model Railroading. 

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Posted by davidmurray on Thursday, February 27, 2020 8:04 PM

Dr Wayne:

I did not intend to imply that you suggested glue.  My most humble apologies.

 

David Murray from Oshawa, Ontario Canada
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Posted by doctorwayne on Friday, February 28, 2020 1:42 AM

Not a problem at all, Dave.  The only reason I mentioned it is the likelihood of the ca ending up where it shouldn't be, gumming up the works.

Wayne

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Posted by joe323 on Friday, February 28, 2020 5:59 AM

doctorwayne

Not a problem at all, Dave.  The only reason I mentioned it is the likelihood of the ca ending up where it shouldn't be, gumming up the works.

Wayne

 

That's the problem with CA you have to apply it sparingly or it ends up all over.

I use Micro-Mark medium CA a lot usually by dripping a drop in a small cup and applying with a tooth pick.

Joe Staten Island West 

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