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I am working on a MTH Monorail and can't seem to locate any parts diagrams at MTH or on the web.  I have a couple of questions that I am hoping others who know or own the MTH Tinplate Monorail can anser....  Refrer to the attached photos... 1.) there is 1 traction tire installed on one of the upper drive wheels.  Is this correct or should there be a tire on the other wheel?  2.) Directly below the center wheel plunger/spring there is a hole in the body.  Is there supposed to be a screw or other part installed?  Seems there should be somthing there to keep the spring/plunger straight up and down.   Thanks!!!!!



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It normally never would have traction tires. Remember while the name is monorail- technically it's 2 electrical rails!!! Upper and lower. If both upper wheels had traction tires you would not pickup the upper rail.

Again, normally it would have no traction tires- however one is OK and may also quiet operation - the knurled wheels rolling on the rail make significant sound.

Yes, there should be a screw- same pitch and length of the body screws.

Let me add something too and I do not know how significant it matters but this is how I handled the situation regarding the traction tire. It comes with no traction tires- again the primary reason- to be authentic to the original and second- you cannot have 2 traction tires or else you cannot pickup the upper rail.

So one traction tire it is- however, catch 22, that changes the effective diameter of the wheel compared to the non traction tired wheel. Since they are geared together, in theory this means the rear wheel being smaller effective diameter is sliding against the rail being pulled by the now traction tire equipped front wheel. I then purposely removed the rear wheel gear (it attaches to the back with 2 screws) and made the rear wheel an idler non-driven wheel. the idea being:

#1 I'm no longer worried about rolling diameter with the traction tire.

#2 I have a spare gear now for the front drive wheel should it ever wear down or get stripped.

#3 one driven wheel with a traction tire seemed to be better traction than 2 wheels driven with no traction tires. Again, we cannot put on 2 without somehow making a 3rd wheel or contact to then pickup the upper rail for the engine.

So again, I personally made a compromise, I didn't want the rolling diameter difference of the wheels to fight each other causing more wear and tear on the motor, the rails, the wheels, and the system as a whole.

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