Beogram 4004 Type 5526: Securing the tangential drive motor and installing a new pulley

In the previous post of this project I identified the need to fix the tangential arm drive motor vibration damping. The old material had deteriorated and was starting to crumble into dust that can get into other components inside the Beogram 4004 cabinet. I also noticed that the tangential drive pulley had some cracks in it.

I removed the pulley and drive motor so I could clean the debris up and make the repair.

Ugly stuff but it is just old foam material and is easy to remove. You can see how fine the debris gets though. That stuff could end up on other moving parts of the Beogram so you really need to get it cleaned out.

There are a lot of options to replace the old damping material. These days remote control cars, helicopters, planes and drones are all the rage. Those all run on electric motors and there are a lot of products to dampen motor vibration. I am using some 1/16" self adhesive neoprene material.

The fit is perfect and the motor does not have any play inside the case anymore.

I added the new pulley and this part of the restoration is complete.

Beogram 4004 Type 5526: New Damping Material for Tangential Drive Motor

I mentioned in the post about Tangential Drive Work that the drive screw motor on this Beogram seemed to have a lot of play in it. I checked some other Beogram units I have and they have very little to no play. The DC motor feels solid inside its black plastic housing on those other Beogram units. Not so on this one.

I needed to do something about the drive motor before I continue so I took the housing off the motor. Sure enough, the foam damping material was all but disintegrated inside.

No saving or restoring this mess. It needs to go so I gathered up the old foam material for disposal.

There are quite a few options available today for a substitute. I decided to run down to my local RC hobby store and see what they use for motor vibration damping in RC cars, air planes, helicopters and other RC vehicles.
I found a 1/16th inch thick dense foam padding material that is sticky on one side. I cut it to size and applied it as two bands (front and back) around the DC motor. I also put a couple small rectangular pieces on the front and back.

It looks quite good and a test fit proved that it should do a good job.

I re-assembled the motor housing and this Beogram drive transport is ready to put back in the chassis.