This comprehensive workshop manual offers detailed instructions and technical specifications for Jungheinrich EKS 308 and EKS 312 order pickers, manufactured from March 2009 onwards. It provides in-depth guidance for maintenance, repair, and troubleshooting, covering a wide range of components and systems. The manual includes a detailed breakdown of the drive compartment layout, operating variants, and tightening torques. It also features comprehensive wiring diagrams for electrical and hydraulic systems, enabling technicians to understand and diagnose issues effectively. Detailed information on speed performance settings, braking distances, and hydraulic speed adjustments is provided, ensuring optimal operation and efficiency. Furthermore, the manual delves into various critical components, including the brakes, brake functions, and magnetic brake settings. It outlines the steps for disassembling, assembling, and replacing controller components, providing clear instructions for technicians. The manual covers the Jungheinrich ISM (Intelligent Safety Management) system, outlining its features, components, and installation procedures. Detailed explanations of various sensors, including speed sensors, temperature sensors, and height sensors, are provided, along with their disassembly, assembly, and adjustment procedures. The manual also includes a comprehensive guide for the drive system, covering the drive motor, drive wheel, load wheel, and transmission systems. The manual also provides detailed instructions for the operator position, mast, and load chain systems. It covers the dismantling, assembly, and adjustment of the operator position, mast rollers, and safety mechanisms. A step-by-step guide for inspecting, cleaning, and lubricating the load chains is provided, ensuring optimal performance. The manual also delves into the hydraulic system, covering the hydraulic motor, hydraulic pump, hydraulic control block, and filter replacement procedures. The manual includes detailed sections on the steering system, encompassing the steering transmission, steering angle sensor, and wire guidance sensors. It provides detailed instructions for assembling, disassembling, and adjusting these components, ensuring accurate steering and control. Finally, the manual concludes with comprehensive sections on warehouse navigation, RFID reader systems, and track assignment, providing valuable information on these specialized features.