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I just recently acquired a Marx 2-4-2 locomotive # 666. I have owned Lionel trains for years but have had no experience with Marx trains to date. The only issue I've noted on the locomotive is that the pickup shoe assembly is broken, I purchased a replacement through the Robert Grossman company but have no idea how to go about replacing it. First look at the unit gives me the impression that I'm going to have to disassemble the motor assembly which means pulling the wheels and rods, having never attempted anything this extensive before, I was hoping someone could steer me in the right direction and possibly provide a list of tools I will need to do the job.

 

Thanks

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Originally Posted by Donovan Nickel:

Yes the plastic fiberboard is broken and needs to come out as well, the copper shoe itself is undamaged so I'm not quite sure how the damage occurred.

 

 

To replace both the shoe and the plastic insulator piece.  Two ways to do this:

 

1.  Remove motor from shell and disconnect the drive rods from the smoker link, and pull the drive wheels using a wheel puller - also available from Grossman.  First lift the brush springs clear of the brushes,  Loosen the top 2 nuts on the brush plate, and loosen the nuts, one on each side of the brush plate.  Remove the ground screw at the bottom of the brush plate.  At this point, you should have enough room to spread the two halves of the frame enough to allow you to dismount the complete pickup assembly.  If you want to completely disassemble,  you can simply remove the four nuts and separate the frame.  Unsolder the old and replace with the new one you have. since you have the wheels off, go ahead and remove and throughly clean the commutator.

 

2.  Another method that does not require removing the wheels is to use a thin ignition wrench or other very thin wrench (sized to fit the nuts on the brush plate) to slide between the drive wheels and the frame in order to loosen the nuts that are behind the drive wheels. Takes holding your mouth just right, but can be done.  Once those two are loosened, loosen the two at the top of the brush plate and gently spread the frame enough (It does not take much) to remove the pickup insulator and shoe.  Re-tighten nuts and go play.

 

Someone can fill in any details I may have overlooked.  It's actually easier to do than describe!

That may be a decent option on motors that are riveted like Lionel, but Marx is held with a few nuts that just need to be loosened. Granted two of them are under drivers, but still a pretty simple procedure.
 
Steve
 
 
Originally Posted by Steamer:

Dr Tinker had a tip years ago about cutting the tabs off one side, and then bending the frame area to hold that side in.

 

Even though an old post this helped me with my Marx 333 thanks to Yukon Jack's post .

What i did was used a 1/4 size open end wrench and ground it flat enough to fit under drivers onto the nut , two of the drivers have the nuts that were loosened and removing brush plate and the upper 2 bolts above brush plate was able to just spread gently enough to remove the whole pickup assembly.

The frame looks like it was never touched after spreading it just enough to remove the pickup.

Thanks so much Yuckon Jack for this method..

 

Pulling the wheels and separating the frame is the best way and is not difficult. The wheel removal allows you to see if the frame needs cleaning and to check for any other things not visible with the wheels in place. A plus in all this is these drivers don't have to be quartered; just lined up so the drive rod tips actuate the smoker flap about equally. Nothing to it.

Jim M

 

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