Thorens TD 124

vyju · 13th June 2012, 05:58 AM

Hi,

I recently overhauled my TD124.Fresh oil 10W-30 in the main bearing.Oiled the motor bearings ,did not open the motor but oiled it using the holes provided in the motor.Cleaned all the drive parts.

The problem is that the TT comes up to speed in one revolution but runs slightly fast. After an hour it starts to run slow and the slowdown is progressive.After another hour it runs slightly slower still.

The spin down time after shut down from 33 RPM is 40 secs.

Also the motor gets very hot after about three hours of use.Very hot to touch.

Another thing I noticed is that the motor continues to spin even if I switch the TT off.

What could be the problem.The TT was working fine before I relubed it.

Regards
Rajiv

analog_sa · 13th June 2012, 06:24 AM

Sounds like the cap across the power switch has shorted and you are running the motor 24/7. Not good at all. Replace the cap or at least remove it.

kevinkr · 14th June 2012, 12:38 AM

Bad cap as analog_sa indicates.

This thread has lots of information on rebuilding your motor which is what you currently need to do: Restoring and Improving A Thorens TD-124 MKII

The eddy current brake is probably misadjusted allowing the table to run fast when cold, then as the motor heats up the motor bearings start to seize which is why it then runs progressively slower and hotter. It may eventually burn out if you do not clean and lubricate the bearings - depending on hours of use replacement bearings may be fitted. There are several good sources on eBay as well as Schopper in Switzerland.

Make sure you are using the correct motor voltage tap for the local mains voltage.

Note that you should really be using 20wt oil in the main bearing and motor - the design depends to a significant extent on the correct viscosity oil for good speed stability. No harm done as you should be able to flush the bearings anyway.

Running properly it should run a bit slow when cold, and once warm run dead on speed. Mine needs a speed adjustment about once a year now unless I change speeds..

I have two, and use one of them nearly everyday, it's about as trouble free as I can imagine, but did not start that way as you will see if you read my thread.

13th June 2012, 05:58 AM	#1
vyju diyAudio Member Join Date: Sep 2004 Location: CHENNAI	Thorens TD 124 Hi, I recently overhauled my TD124.Fresh oil 10W-30 in the main bearing.Oiled the motor bearings ,did not open the motor but oiled it using the holes provided in the motor.Cleaned all the drive parts. The problem is that the TT comes up to speed in one revolution but runs slightly fast. After an hour it starts to run slow and the slowdown is progressive.After another hour it runs slightly slower still. The spin down time after shut down from 33 RPM is 40 secs. Also the motor gets very hot after about three hours of use.Very hot to touch. Another thing I noticed is that the motor continues to spin even if I switch the TT off. What could be the problem.The TT was working fine before I relubed it. Regards Rajiv

14th June 2012, 12:38 AM	#3
kevinkr diyAudio Moderator Join Date: Sep 2004 Location: Boston, Massachusetts Blog Entries: 6	Bad cap as analog_sa indicates. This thread has lots of information on rebuilding your motor which is what you currently need to do: Restoring and Improving A Thorens TD-124 MKII The eddy current brake is probably misadjusted allowing the table to run fast when cold, then as the motor heats up the motor bearings start to seize which is why it then runs progressively slower and hotter. It may eventually burn out if you do not clean and lubricate the bearings - depending on hours of use replacement bearings may be fitted. There are several good sources on eBay as well as Schopper in Switzerland. Make sure you are using the correct motor voltage tap for the local mains voltage. Note that you should really be using 20wt oil in the main bearing and motor - the design depends to a significant extent on the correct viscosity oil for good speed stability. No harm done as you should be able to flush the bearings anyway. Running properly it should run a bit slow when cold, and once warm run dead on speed. Mine needs a speed adjustment about once a year now unless I change speeds.. I have two, and use one of them nearly everyday, it's about as trouble free as I can imagine, but did not start that way as you will see if you read my thread. __________________ "Extraordinary claims require extraordinary evidence." - Carl Sagan

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Restoring and Improving A Thorens TD-124 MKII	kevinkr	Analogue Source	701	16th May 2013 04:39 PM
Thorens td-124 mk2 wavering pitch, help	boidos	Analogue Source	8	19th August 2011 04:16 AM
Thorens TD-124 noise diagnosis	dls123	Analogue Source	32	10th February 2011 08:15 AM
Thorens TD-124 newbie	neil_kaye	Analogue Source	6	17th March 2008 02:44 AM
Thorens TD 124 MKII question	louis	Analogue Source	3	2nd July 2003 03:27 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

13th June 2012, 06:24 AM	#2
analog_sa diyAudio Member Join Date: Aug 2002 Location: Sofia	Sounds like the cap across the power switch has shorted and you are running the motor 24/7. Not good at all. Replace the cap or at least remove it.