Adjusting and lubricating the BeoGram 7000

After the electronic components are replaced, the BeoGram 7000 gets new belts, fresh lubrication and a full adjustment to the service manual.

Worn belts cause wow and flutter and make it hard for the turntable to hold its speed, so I replace both, the drive belt (pos. 1046) and the servo belt (pos. 1021).

The lubrication chart specifies Barrierta L 55/2 for the camwheels, rail, shafts and pulleys, Isoflex PDB 38 CX 2000 for the flywheel centre shaft and Molykote GN+ for the centre bearing. These are hard to get today, or only sold in large quantities. I clean the old grease off every point in the chart with a cotton bud and lukewarm water. The rails get a silicone grease that doesn't harden or liquefy over time, such as SGM494, and everything else gets an oil free PTFE lubricant such as Weldtite TF2.

Finally, I adjust the turntable to the service manual. That covers the speed, with 33 rpm set first on R34 and then 45 rpm on R32, the 53 mm indicator arm height and the pickup arm height and parallelism, the 17 cm and 30 cm set down points, and the photo control diaphragm, so the servo first regulates within 1.5 to 2.5 turns. Last come the turntable height, 2.5 to 3 mm below the top plate, and the centring.