I discussed removing the rear window motor in my '70 300 vert here: Removing Motor
The original idea was to just replace with a newer model I had sitting on the shelf, but that didn't work, so let's just fix the old one instead.
The problem was real obvious when I took the old motor apart. The commutator was covered in grease and crap and one of the brushes was stuck and not making good contact.
I've freed up the brush, but you can see the crud.
Because it's a worm drive, you can count on a thrust washer of some kind on both ends of the shaft. See the little round piece with the hole in it? That goes down in the end bushing.
This washer (thicker) goes on the other end. Note the nasty black grease. This was after I started scrapping it out.
The original idea was to just replace with a newer model I had sitting on the shelf, but that didn't work, so let's just fix the old one instead.
The problem was real obvious when I took the old motor apart. The commutator was covered in grease and crap and one of the brushes was stuck and not making good contact.
I've freed up the brush, but you can see the crud.
Because it's a worm drive, you can count on a thrust washer of some kind on both ends of the shaft. See the little round piece with the hole in it? That goes down in the end bushing.
This washer (thicker) goes on the other end. Note the nasty black grease. This was after I started scrapping it out.