Above are all very good tests. You may also contact Underground sound in Memphis TN. They are old time AR tweekers and offer info, repair, parts ect.
Mr. Merrill has retired a short while ago and I don't know if you can now get a whole lot from Underground Sound for AR tts. It may be worth a try, but don't hold your breath. Plenty of info available at AA on the mother of all suspended tts. A number of companies have replacement motors. I believe the original was manufactured by Hurst (won't swear to that though) and they are still available from them. Good luck and don't ditch that cd player!
I did some trouble shooting before posting and did the things that Viridian suggests. The brushing–grinding is in the bearing, seat area. There is another problem though which is motor related. Even while the unit is off the motor trembles-vibrates(to the touch). When on the platter turns at the right speed but the vibration while off troubles me even though I don't know weather it adds rumble during play.Thanks for all your help and any more suggestions for a remedy or as to whom to contact for information would be appreciated. Cheers
The spindle is square and true with no wear or damage I can see.The platter doesn't seem to be spinning as free and easy as it should and the very low grade brushing–rubbing–grinding sound is ever present. I believe I will try to contact the sources suggested above for assistence. The trouble "looks" to be the bearing seat,(the brass or bronze alloy?) that the bearing rests on. Thanks Viridian and all others for your input. Peace