Author Topic: 40' foot kadee boxcar problem  (Read 869 times)

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h2w

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40' foot kadee boxcar problem
« on: September 23, 2015, 11:44:47 PM »
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 i have a new 40 foot kadee boxcar that can't negoiate a 15 inch curve , I have no problems with atlas or athearn 40 foot and 50 cars or a gp7, the wheels on the 40 foot seems to bind when it enters the curve and derails. any ideas?
thanks
Mark

nkalanaga

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Re: 40' foot kadee boxcar problem
« Reply #1 on: September 24, 2015, 01:41:28 AM »
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Usually on my cars (N scale) it's either the draft gear or the center sill causing the problem.  If you have a loose piece of 15 inch radius track you can turn the car over, put the track on the wheels, and roll it back and forth to see where the problem is.

If not, my usual solution is to turn the trucks by hand and see what they hit first.  Usually it's the draft gear, but N scale draft gear tends to be oversized anyway, so in your case it may be something else entirely.

Does your car have 3-D brake rigging?  If so, one of the rods/pipes may be out of place, and the wheels are hitting it.  If that's the case, you should be able to bend it out of the way, or, worst case, cut it off.  If you have to cut, trim as little as possible, and it shouldn't be noticeable when the car is on the track.

You might check the coupler swing on this one.  Sometimes, if the coupler is binding, it will force the entire car to the side, making it LOOK like the wheels are binding.

Now, if you have other KD boxcars that work fine, you can also do a very close inspection, and try to find anything that looks different.

If there is any irregularity in your track, it could even be that the truck screws are too tight, and the trucks can't rock enough to follow the track.

A long shot, but there might be a rough spot on either the truck or body bolster, and the truck only binds when turned as far as possible.  That should show if you turn the truck slowly by hand.

It might even be the track itself, and the particular wheels on this car, combined with a slight flaw in the track, climb the rail.  Do you have other cars with the same trucks or wheels?

Good luck!
N Kalanaga
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Spikre

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Re: 40' foot kadee boxcar problem
« Reply #2 on: September 24, 2015, 04:04:28 PM »
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  :?
   sounds like it could be the truck journals binding,or Flash on the wheels.
   both are well known Kadee problems.
   try a pair of Kato ASF A-3 trucks and see if they work.
   if not its something on the underframe,air pipes or brake rods.
   also check that the underframe is sitting level on the floor casting.
    if this car has the metal sprung trucks they need a good run in.
    don't have any of the Split HGC trucks,so not sure what sort of problems
   they may come with ?
    note that the floor is depressed around the wheels,this is to help rolling
   on uneven track,and to stop the metal wheels from shorting out.
      look everything over closely,and test roll the trucks until they roll easily.
       Spikre
          :?

h2w

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Re: 40' foot kadee boxcar problem
« Reply #3 on: September 25, 2015, 07:28:24 PM »
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thank you for the input, i turned the car upside down and someone had replaced the metal wheels with plastic ones that rub on the brake shoes.
thanks for the input,

nkalanaga

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Re: 40' foot kadee boxcar problem
« Reply #4 on: September 26, 2015, 01:58:14 AM »
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OK, I didn't even think of the wheels not being original!  At least you solved the problem.
N Kalanaga
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bnsf971

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Re: 40' foot kadee boxcar problem
« Reply #5 on: September 26, 2015, 06:50:54 AM »
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thank you for the input, i turned the car upside down and someone had replaced the metal wheels with plastic ones that rub on the brake shoes.
thanks for the input,
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nkalanaga

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Re: 40' foot kadee boxcar problem
« Reply #6 on: September 27, 2015, 12:45:15 AM »
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If it's a new car it sounds like KD put the wrong wheels in it at the factory.  Surely not!?
N Kalanaga
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h2w

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Re: 40' foot kadee boxcar problem
« Reply #7 on: September 28, 2015, 11:35:37 PM »
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on these kadee cars do the wheels have a flexible plasti axle?

Spikre

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Re: 40' foot kadee boxcar problem
« Reply #8 on: September 29, 2015, 08:24:12 PM »
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 :?
   Plastic Wheels wont short out.
   Good Plastic Wheels are not as bad as many think.
   but it does sound like someone Raided the car for the wheels ?
  are Youn sure the Trucks are Kadee Trucks ?
    Spikre
      :?