The most referenced page. It shows Part #209 (the stepped motor pulley), #222 (the idler wheel), and crucially, #139 (the main bearing ball thrust plate). Never lose this diagram.
The manual shows the four screws and the grounding strap that secure the chassis to the plinth. Remove these carefully to avoid stripping the 60-year-old threads. thorens td124 service manual
Using the diagram, locate the idler wheel cam. The manual details how to adjust the eccentric pin to ensure the idler meets the motor pulley and the inner platter rim perfectly flush—not vertically misaligned. The most referenced page
The manual instructs you to remove the platter, pull the inner shaft, and clean out the old oil. Crucially, it notes the thrust ball (Part #138) at the bottom. Do not lose it. The manual says to replace the felt oil wick (Part #137) if it is hard. The manual shows the four screws and the
Without this document, you are flying blind. With it, you become the master of your machine. First, a crucial distinction. The User Manual is a simple two-page foldout that tells you how to plug it in, turn it on, and change speeds. The Thorens TD124 service manual (often referring to the original Thorens TD124 Instruction for Service or the later TD124 MkII supplement) is a deep-dive technical blueprint.
The TD124 came in 50Hz (European) and 60Hz (US) versions. The manual shows how to re-wire the motor for different voltages (110/125/220/240v). If you import a deck from Germany to the USA, you must follow this diagram or you will burn the motor coils.
According to the manual, you must disconnect the motor springs (Part #124) using two pairs of pliers. Do not stretch them. Set the motor on a clean cloth.