Beogram 4004: Restoration of DC Platter Motor

I recently received a Beogram 4004 DC platter motor from Texas. The motor exhibited the typical shrieking noises when running it from a bench supply at 5V. A clear indication of dry bearings.

This shows the motor as received:

I took the motor apart to get the brass bearings out for oil infusion:

The bearings are the two small donuts on the black pad up front. I immersed them in motor oil and pulled a vacuum. Immediately vigorous bubbling started, indicating thirsty bearings:

After about 48 hours the bubbling stopped (indicating that the bearings were replenished with oil) and I extracted the bearings:

Then I reassembled the motor and installed it in one of my Beogram 4002s for a 24 hrs RPM stability test using the BeoloverRPM device. The BeoloverRPM allows logging the RPM every 10 seconds over extended periods of time. This is the curve I measured:

This result is as good as it gets! This motor is ready for duty again!