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I’ve recently been focused on cleaning all of the track on my layout.  Prior to that, I hadn’t noticed any performance concerns, but the cleaning was probably overdue.  After I cleaned it, I ran a new steam engine around 2 loops and it performed well.  However, I then added a consist of 6 MTH premier passenger cars and sent it up a roughly 2.2% grade.  It got halfway up and the steamer’s wheels began to spin as it lost traction.  It was moving at 25 scale mph.  After I backed it back down, I tried it again going at 40 wondering if momentum would carry it - yes it went further, but with the same ultimate result - I expected that but I thought I’d give it a shot.  My first thought was to inspect the engine and it’s traction tires and they looked fine. I also wondered if maybe the suspension caused those wheels to have poor contact with the rails but all looked well.  I then combined the consist with another steamer that I had usually paired with it and which traditionally had no problems pulling it up the grade.   Sure enough, this engine began to slip as well.  I took a rag and ran it across the rails and it came back clean and dry, that is, no dirt and no sign of any grease or lubricant of any sort — so maybe too clean?  

I had used WD-40 contact cleaner (not the lubricant) to clean the track which I had on hand and which I had seen as recommended in another thread several months back.  I’m wondering if it polished the rails too well.  The layout is a combo of Ross and Gargraves.  My ultimate solution was to take a sanding block to rough up the rails and sure enough, both engines and the consist once again made it up the grade without too much concern.  I had to go back and do an additional rough up on the rails in some spots where I did see some continuing slippage.  I just thought I’d share this with you all.  Btw, I did not have any concerns when the train ran on a flat surface.  The loss of traction on an incline was the concern.

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Thanks Joe.   Actually I had used denatured alcohol in prior cleanings without this problem happening.  I recall that the recommendation for the contact cleaner had referenced another report that suggested it minimized certain reactions between the trains wheels and tracks which caused the track to in effect, become dirty sooner.  You may be right about the residue but contact cleaner was supposed to minimize residue.  Nonetheless, I won’t use it again.

@Hot Water posted:

For what it's worth, if you have MTH DCS on your layout, do NOT use any "cleaner" that will leave ANY sort of film/residue in the rails.  Been there, done that!  Thus, I never used ANYTHING other than denatured alcohol or Lacquer thinner, on a soft cotton rag wrapped around a short piece of 1" X 2" pine lumber.

Alcohol has a dielectric constant of 19.  Lacquer thinner is even worse at 33.6.  Contact cleaner is 1.9, but if it leaves a residue, I won’t be using it.  I have been using mineral spirits (dielectric constant 2.1) with good results.  Works faster than alcohol and track/wheels stay clean longer.  See this link.

Model Railroad Hobbyist magazine

Hey Bob.  The table in your referenced article was the one I had seen and used that as guidance.  Because I had the WD-40 contact cleaner on hand and based on that article, I sprayed the stuff on a rag and went to work on the track.  It is an interesting article.  Unfortunately, the article didn’t mention the residue problem.  Lesson learned.  Thanks!

I think the track can get too polished. I've had several 2 or 3 day open houses where after many hours of running, the rails on a 3 percent grade seemed to get polished and made it difficult for the heaviest trains to get up the hill due to slipping (2 rail layout). After a week or so of no train running, the trains made it up the hill again without trouble. I'm guessing oxidation made some difference, not sure.

I have used alcohol to clean the rails for years. Then I saw the article about mineral spirits posted above and it seemed like a magic bullet. I used the mineral spirits once and watched the trains slipping on the grade. I then went back to cleaning the rails with alcohol because I think the mineral spirits left a residue and any film will collect crud. The mineral spirits may clean the rails better, but my trains have always run great and no slipping when using alcohol so I think I'll stick with the alcohol for now.

I would not sand or scrape the rails. That will put grooves in the rail which collect dirt.

Last edited by christopher N&W

I don't think rails can be too clean.    And as above, some things are lubricants, that also help contact.   Using then is a matter of personal choice.    I have tried both Mineral Spirets and recently the wd40 contact cleaner.   I think the mineral spirits works better.

But on the subject of too clean, I think rails can get too dry.   Alcohol, I think, contributes to this.    When both the rails and wheels are very dry as when cleaned with alcohol, and there is a small spec of dirt or ridge in the rail or wheel, there is arcing.   When you have arcing, you often see sparks.    But when you have arcing, you also get pitting on the wheels.    The arcing essentially burns small "potholes" in some wheel material, especially the sintered metal kind.    The holes then collect dirt and contribute to more arcing which causes more holes etc.   A lot of diesel models, especially All Nation, and older Lionel have sintered  metal wheels.

Mineral spirits and WD 40 contact cleaner tend to leave a film that improves contact and eliminates arcing.    I am willing to put up with a little slippage to protect wheels from arcing.    I have some older diesels with badly pitted wheels from this.    If the train slips, I just add a helper locomotive.

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