Beogram 4002 DC Platter Motor Restoration

I recently received a DC platter motor from a Beogram 4002 located in the UK. The motor exhibited the usual squeaky noises when running it on the bench indicating dry bearings. This shows the motor as received:

I took it apart to get to the bearings:

The bearings are the small donuts on the back pad upfront. I immersed them in motor oil and pulled a vacuum. Immediately vigorous bubbling started indicative of bearing material thirsty for oil:

The vacuum draws the air out and makes room for inter diffusion of oil. After about 3 days the bubbling stopped and I extracted the bearings:

I re-assembled the motor and installed it in one of my Beogram 4002s for a RPM stability test with the BeoloverRPM device:

The BeoloverRPM allows logging the RPM over long periods of time in 10s intervals. This allows detection of sporadic RPM fluctuations that are difficult to demonstrate by just listening to records. This is the curve I measured over about 24 hrs:

This is as good as it gets with the Beogram 4002 DC platter motors. This motor is ready for duty again!