I recently received a DC platter motor out of a Beogram 4002 located in Virginia. This shows the motor as received:
This is a follow up to my recent post about the redesigned Beogram Commander remote control board, which now works in both (DC-motor) Beogr...
Thursday, June 2, 2022
Beogram 4002: DC Platter Motor Restoration
I disassembled the motor to get the bearings out for oil infusion:
I submerged the bearings in motor oil and pulled a vacuum:
Immediately vigorous bubbling started from the bearings. This indicates that the vacuum drew the air from the empty pores of the oilite bearing material. This made room for fresh oil to inter diffuse into the bearing. After about 3 days the bubbling stopped and I extracted the bearings from the oil:
I installed them back in the motor. Then I tested the reassembled motor in one of my Beograms with the BeoloverRPM device, which allows logging the RPM in 10s intervals over extended periods of time: