Do-It-Yourself Story

I ordered the armature and field-asm cause I did a test on the armature by connecting it directly to the power line and did not have any movement. Upon changing the armature and assembling the brushes, I realized one of the brushes was getting held up. I opened up the edges of the brush holder and that did it. I knew nothing seemed wrong with the parts I took out so I concluded that was the problem because I had just bought it, used it only twice and it stopped working.