While converting some of my locs from a Delta model to a high efficency model I have made a discovery which was not expected. I have noticed that the last batch of 60901 conversion kits I purchased the housing which holds the brushes does not line up with the pins and holes on the frame around the armature. The old housing from the Delta model how ever does.

It seems that the kits I received had some parts swapped before shipped to me and there fore the problem. The housing which I received were really ment for the 60903 kit.

Below I are the steps I took to make the housing from the Delta model replace the wrong piece in the 60901 kit. I opted for this solution since the cost of postage would have made the cost of the kit about twice the normal cost (postage both ways).

The first photo shows the delta motor installed and below a 60901 conversion kit with wrong housing. The second photo shows a better view of how the housing just does not seem to line up properly.

Photo #3 shows the new motor mounted but with the housing from the Delta model. Photo #4 shows a factory installed motor on top and the locomotive below it shows the new motor I am installing with the housing from the Delta model. Notice how the housing on the locomotive sticks out more than the one in the locomotive above it. We'll fix that problem in the steps below.

Before we can reduce the width of the housing from the Delta model, four holes have to be drill right through in order for the pins on the Bi-pol socket to be properly seated. The red arrows show where the holes must be drilled through. The holes are already started, we just have to complete the task.

The above photos show how I setup the bandsaw to remove the excess material from the housing. The best approach is to cut part way through on all four sides in order to ensure a square cut. Also it will minimize the possibility of your hand from being in contact with the blade.

The above photos show the modified housing reinstalled after all the burrs were removed. From here on the normal installation steps can be followed. I have done four motors like this and the results are perfect every time. I have not noticed any extra noise or possible misalignment of the armature.