I restored another Beogram 4002 DC platter motor for a returning customer. I guess one Beogram is just not enough for a real B&O aficionado!..;-). This shows the motor:
It made the typical dry bearing noises when I bench tested it. I took it apart to get to the bearings:
The bearings are the two small donuts on the black pad. I immersed them in motor oil and pulled a vacuum. Immediately vigorous bubbling started indicating 'thirsty' Oilite bearing material:
After about 2 days the bubbling stopped and I extracted the replenished bearings from the oil:
I put the motor back together and installed it in one of my Beogram 4002s for a 24 hrs RPM stability test with my BeoloverRPM device:
The BeoloverRPM allows logging the RPM in 10s intervals for long periods of time. Perfect for detecting intermittent RPM issues. This is the curve I measured for this motor:
This is pretty much as good as it gets with the DC platter motor! Time to send this motor to its new Beogram home!
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