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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...

Wednesday, January 23, 2019

Beogram 4004 (5526): Hood Restoration

While I am enjoying listening to the Beogram 4004 (5526) that I recently finished up, there was still its scratched hood that needed a good polishing. This hood showed the usual scratching, but was otherwise undamaged. No cracks in the hinges etc..., i.e. a perfect starting point for a restoration. This shows the original condition:
I was able to feel some of these scratches with a fingernail, i.e. this hood needed an equalizing  sanding before polishing it back to translucency. Since the scratches were not too bad, I started out with 320 grit sand paper and went at the surface until all the scratches were no longer visible:
Then it was time to polish it with ever finer grit paper. After 6 steps it looked pretty good again:
Most of these hoods had rubber bumpers installed at the front corners, but they are usually broken off. I usually drill them out with a 2mm bit:
And then I glue snippets of a 2mm O-ring into the cavities:
After the glue is hardened I cut them to 1 mm length with a razor blade over a 3D printed 1mm thick washer:
This hood is ready to be installed! Soon this Beogram 4004 will travel back to its owner!

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