Clean the linkage levers underneath the chassis. Old grease turns hard and locks up the speed selector switch.
Clean and re-oil E50 motor; replace belt; scuff idler wheel edge.
Reassemble the bottom cap tightly. Pour high-quality Thorens-specification bearing oil (typically a higher viscosity oil like ISO VG 68 or factory-equivalent) into the well. Slide the platter spindle back into the well slowly. Let gravity pull it down; forcing it down can trap air or damage the seals. 5. Pitch Control and Mechanical Linkages
Unlike belt-drive turntables (like the Linn LP12 or AR-XA) or direct-drive (Technics), the TD124 uses an intermediate that transfers vibration from a stepped motor pulley to the inside rim of the heavy platter. This design offers incredible torque, but it is finicky. thorens td124 service manual
The factory manual shows the layout of the spindle bottom. Original plastic thrust pads often deform under the weight of the heavy platter. Replacing this pad eliminates vertical play and drastically reduces background noise (rumble).
Because the TD124 uses a high-torque motor and an idler wheel, managing vibration is crucial for high-fidelity playback. The service manual outlines several damping elements that must be replaced as they age:
Late that night, with the manual still open to the final "Adjustment of Speed" section, Elias lowered the tonearm onto a dusty copy of Kind of Blue Clean the linkage levers underneath the chassis
Keeping a vintage Thorens TD124 running like a Swiss watch requires more than just a casual dusting. If you’re diving into a restoration or just doing routine maintenance, you can find the original service manual at the Internet Archive or via Vinyl Engine .
: Page 12 detailed the E50 motor. He carefully unsoldered the leads, noting the exact position of the bushings. One wrong move and the legendary "silent" drive would hum like a beehive. The Step-Pulley Dance
| Common Issue | Root Cause | Service Manual Solution | | :--- | :--- | :--- | | | The stepped pulley bushing is worn or dry. | Disassembly of the step pulley; re-oiling the Oilite bushing or replacing the shaft. | | Speed Instability (Running Fast) | Old lubricant in the main bearing causing drag; OR voltage mismatch. | Cleaning and relubing the bearing; verifying the voltage selector is in the correct position for your mains frequency (50/60Hz). | | Idler Not Engaging | The idler wheel height is off due to worn parts or misadjustment. | Adjust the idler wheel height via the set screws detailed in the mechanical diagrams. | | Slow Start-up | Hardened grease in the motor bearings. | Complete motor rebuild; replacing felts and bushing; using electric motor oil only. | | Clutch Failure | Missing or worn brake pads; maladjusted conical bolts. | The manual provides the 3-bolt adjustment procedure. Some users cut replacement pads from artist erasers if OEM pads are unavailable. | Reassemble the bottom cap tightly
Specific guidance on what type of oil to use for the motor and main bearing.
+--------------[ Power Switch ]--------------+ | | [AC Input] --- [ Voltage Selector Block ] --- [ Spark Suppressor ] --- [ E50 Motor ]