What do these Brush Plates go to?

I would say the brushplate on the right is 600-121.

600-121 or 600-141?  Then the brush plate on the left is 2321-113?

Thanks

David Johnston posted:

600-121 or 600-141? Then the brush plate on the left is 2321-113?

I know it's not the clearest picture, but both brush plates are stamped with "pt. no. 2321-115" plus a single digit number below that main part number.

The brush plate on the left is 2321-115 with the number 2 stamped below, while the one on the right is 2321-115 with a 1 stamped below.

So what I am asking is if you know what engine(s) these both went into?

Thanks

Hi. The 2321-115 part number is the number for just the piece of plastic. The single digit number is the cavity  number. The parts were made in a multi cavity mold. The first number indicates it was first made for the 2321 postwar train master. With the addition of the brush holders, felt wick and bronze bearing the part becomes something else.    I think the part in the left, as a complete assembly, is 2321-113. I am hoping that Chuck can varify this.  It then looks like the mold was modified to make the 600-141 brush holder.  This would have first been used on the 600 switcher. Then later on a whole family of these NW2 switchers. I think the plastic part was again reused to make a brush holder assembly used on the 200 series of locomotives. 

Once you figure out what the brush holder assembly part number is, then you can use one of the maintenance guides to figure out which locomotives it goes on.  There could be quite a few of them. 

To make things even more confusing, The 222 Rio Grande service manual pages (you can check this out on Olsen's library) lists 2 different brushplates, armatures, and brushes for the same locomotive! The 222-103 brushplate is the same as 600-141, less the top armature bushing. The 600-141 brushplate looks as if the sides were reinforced, to add more support to sit on top of the field stack on the integral type motor and truck vs. the separate motor assembly. Surprisingly, the early 600 series switchers used the 2321-113 brushplate, and not the 600-141 part. At least according to the service manual, which we all know is riddled with errors.

It looks like they would fit aall engines that took a 2028-100 motor also...

Marty

So it would appear that if it fits...run it! Perhaps I worried too much about the detail. Anyway, as soon as I get some time, I will be popping one of these into my 602 Seaboard to see if that improves matters.

I probably should have put a new bottom plastic bearing plate in the 602 while I had things split apart a few months ago, but I really wasn't aware of just how critical/touchy that bottom plate can be! I suspect wear in the bottom bearing is far more critical than wear in the brush plate bearing, although neither is the least bit desireable! 

Thank ya'll, always a great response when asking questions here!!!!