To disassemble the injection needle of Shimadzu liquid chromatograph, you can follow these steps: 1. Adjust the automatic injector to the middle position to facilitate operation. 2. For models like AOC-6000 automatic injector, if the injection needle is connected to related tools, disconnect it first. 3. Use a small screwdriver to remove the fixed screws of the injection needle in the specified order; avoid excessive force to prevent damage to threads or components. 4. Store the removed screws in a safe place to avoid loss. If you encounter difficulties during disassembly, or need professional maintenance, repair, replacement of injection needles and other consumables/parts for Shimadzu or mainstream brands (including Thermofisher, Waters, Agilent, etc.), our company Jiangxi Bio can provide comprehensive solutions. We offer services such as instrument repair, lease, cleaning and maintenance, and supply a full range of consumables and spare parts for chromatographs, mass spectrometers, etc. We also provide chromatograph application consulting to help you solve related problems efficiently.