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Beolover SyncDrive: DC Platter Motor Replacement for Beogram 4002 and 4004 (Type 551x and 552x)

Late Beogram 4002 and the 4004 (Types 551x and 552x), which have DC platter motors instead of the earlier synchronous AC motors usually suff...

Saturday, December 8, 2018

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.




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