This is the observation car.
See if this helps with coupler conversion. It’s from Kadee’s site.
https://kadee.com/conv/pdf/i141.pdf
As far as the rear coupler, it looks like some type of pin holds it there. Maybe with the body shell off, you can drive the pin through.
Mike.
Considering the spec is +/- .017, you could have problems with an already low car.
https://www.nmra.org/sites/default/files/standards/sandrp/pdf/s-2_2010.09.pdf
Trip pins will be the first thing that causes problems, usually catching on turnouts or grade crossings. Uncouplings may or may not happen, depending on how smooth the transistion between level and not level track is and if the couplers are all the same height.
That said, I put intermountain 33" wheels on all my accurail cars and had no issues. Those IHC cars look like they have 33" wheels from your pictures. It will just depend on how you mount the couplers.
0.017" sound small, but it is almost one half of a millimeter, and is noticeable, and in HO scale it will effect perfomance.
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+/- 0.002" should be your goal.
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Try to find a good used Mitotoyo or Central dial caliper in a pawn shop, and learn how to use it.
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0-6" will do almost everything you need in the hobby.
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-Kevin
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FWIW, 33" Intermountain wheelsets work just fine in Accurail cars. I have bunches of Accurail 40’ boxcars, and I used Proto 2000 metal wheels until I ran out, so I bought a bulk pack of 100 Intermountain wheelsets. If you want to use these in everything, that’s fine.
I can’t help you with the resistors, sorry. One of my friends uses current sensing, and I believe he was super gluing surface mount resistors to Intermountain metal wheels. I’ll ask him about it the next time I see him.
As far as passenger cars, I use 36" wheelsets, Kadee, Intermountain, or Proto 2000. I can see the difference, and it bothers me, so I changed out the wheelsets on my Rivarossi and Con-Cor passenger cars. I did have to shave down the brake shoes, though. If you want to use 33" wheelsets on your passenger cars, though, do it and sleep well at night.
They do not work in some Atlas cars.
DavidMurry: “33 inches scales to .38 inches 36 inches converts to .41 inches.” That’s the key to this question. Measure the diameter of the existing wheels.
Upthread the OP said he wanted to convert Accurail cars, hence my reply. Later on he mentioned IHC passenger cars. I’m not certain about IHC, but nowhere did he mention Atlas.
This statement implies that you can use intermountain wheelsets in any HO car. When you said everything, the OP may actually think you mean everything.
If you were to say everything made by Accurail, I would not disagree. I have had 0 issues putting intermountain wheelsets in Accurail cars.
I should have been more specific as to why I was making the comment in the original post.
[sigh] Fair enough. How about, “if you want to use these in everything you own, that’s fine.” Or “if you want to use 33” wheels in everything, that’s fine."
As stated above.
[quote user=“SeeYou190”]
0.017" sound small, but it is almost one half of a millimeter, and is noticeable, and in HO scale it will effect perfomance.
.
+/- 0.002" should be your goal.
.
Try to find a good used Mitotoyo or Central dial caliper in a pawn shop, and learn how to use it.