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The following are the installation steps for the Isuzu clutch friction disc: •  Preparation work: Ensure the installation environment is clean and dry, the vehicle is parked on a flat ground and the handbrake is pulled tight. Prepare the new clutch friction disc, pressure plate, release bearing and other clutch three-piece set, as well as appropriate wrenches, sockets and other tools.  •  Make assembly marks: Make assembly marks on the clutch cover assembly and the flywheel assembly to ensure correct alignment during installation and accurate relative positions of all components.Removing the old clutch disc: Gradually loosen the fixing bolts of the clutch cover one turn at a time until the spring tension is completely released. Then remove the fixing bolts, pull down the clutch cover and the clutch friction disc assembly, and at the same time remove the release bearing and release fork. Next, remove the release fork and release bearing assembly from the first shaft of the transmission.  •  Cleaning and inspection: Use a cleaning cloth to thoroughly remove oil stains, rust, and debris from the surfaces of the flywheel and pressure plate. Check whether the new clutch friction disc is damaged or worn. Also, check whether the release fork and the aperture holes are deformed, and whether the release bearing and transmission bearing are in good condition.Lubricate the pilot bearing: Add an appropriate amount of lubricating oil to the pilot bearing of the flywheel to ensure smooth operation and reduce friction.  •  Install the release bearing and release fork assembly: Install the release bearing and release fork assembly in the correct position and check if the release bearing moves smoothly.  •  Install the clutch friction disc: Place the new clutch friction disc on the flywheel, align the splines in the middle with the input shaft of the transmission. Pay attention to the installation direction of the friction disc; usually, the side with the boss faces the transmission, and the flat side without the boss faces the flywheel.Install the pressure plate: Mount the pressure plate onto the flywheel, align it with the previously made assembly marks, secure the pressure plate with bolts, and evenly tighten the bolts to the specified torque. Avoid tightening them sequentially on one side to prevent uneven heights of the release fingers.  •  Install components such as the drive shaft: Reconnect the drive shaft to the transmission and tighten the nuts.  •  Inspection and testing: After installation is complete, start the vehicle, test the operation of the clutch, check whether it can disengage and engage normally, feel if the clutch pedal operates smoothly without jamming, abnormal noises, etc. At the same time, conduct gear shifting tests to ensure smooth gear shifting and normal power transmission.

When installing the Isuzu clutch friction plate, the following precautions must be paid close attention to avoid clutch failures (such as incomplete disengagement, slipping, abnormal noise, etc.) caused by improper operation: I. Core Checks Before Installation •  Do Not Reverse the Direction of Components: The friction plate has a clear installation orientation. Usually, the side with a boss, damping spring, or marked "Towards the Transmission" must face the transmission side, and the flat side must face the flywheel. Reversing the installation will cause abnormal clutch disengagement clearance, making it impossible to shift gears normally.  •  Matching New and Old Parts: Ensure that the size (outer diameter, inner diameter, number of spline teeth) of the new friction plate is consistent with the original one of the vehicle to avoid poor power transmission or jamming due to inconsistent specifications.Synchronous inspection of associated components: It is recommended to synchronously inspect the pressure plate (check if there are scratches or deformations on the surface, and if the spring force is uniform), the release bearing (check if it rotates smoothly without abnormal noise and if the internal lubrication is sufficient), and the flywheel (check if the surface is flat, if there are grooves or warping, and perform turning processing if necessary). If there are any problems, they should be replaced synchronously to avoid premature damage to the new friction plate.Key Requirements for Cleaning and Lubrication •  Thoroughly Clean Contact Surfaces: The mating surfaces of the flywheel and pressure plate, as well as the surface of the friction disc, must be free of oil, grease, and dust. If contaminated with oil, it will cause the clutch to slip. Use a dedicated cleaning agent for cleaning (avoid gasoline to prevent residual corrosion), and ensure the surfaces are dry and free of impurities after wiping.  •  Precisely Lubricate Key Components: Only apply a small amount of high-temperature grease to moving parts such as the flywheel guide bearing, release fork shaft, and the inner ring of the release bearing. It is strictly prohibited to lubricate the working surface of the friction disc or the mating surfaces of the pressure plate and flywheel, as this will severely affect clutch performance.Operational Specifications for the Assembly Process •  Align Assembly Marks: When installing the pressure plate, strictly align it with the marks made on the clutch cover and flywheel before disassembly to ensure the correct relative position between the pressure plate and the flywheel. This avoids uneven heights of the release fingers, which could cause abnormal pedal travel.  •  Uniform Bolt Tightening: The bolts for securing the pressure plate must be gradually tightened in a "diagonal cross" pattern and must reach the torque specified by the manufacturer (for common Isuzu models, the torque is approximately 25-35N・m; refer to the vehicle manual for specifics). It is prohibited to tighten the bolts on one side all at once to prevent deformation of the pressure plate.Ensure smooth spline fitting: When installing the friction plate, a small amount of grease can be applied to the splines of the transmission input shaft to facilitate the insertion of the friction plate. At the same time, check whether the friction plate can slide freely on the splines without jamming, ensuring that the friction plate can be smoothly disengaged when the clutch is separated.  •  Check the separation gap: After assembly, manually toggle the release fork to confirm that the contact between the release bearing and the pressure plate release fingers is uniform, and the gap meets the standard (usually judged indirectly by the free travel of the pedal; the free travel of Isuzu models is generally 15-25mm, which can be fine-tuned by adjusting the fork or push rod).

References：The "passage" you mentioned refers to the previous content about the precautions for installing Isuzu clutch friction plates, right? That passage was summarized and organized based on relevant automotive maintenance knowledge and experience, and there is no specific single source. The content of these precautions refers to automotive maintenance manuals, professional automotive maintenance tutorials, and some practical experience in the automotive maintenance industry. After integrating knowledge from various aspects, a relatively comprehensive explanation of installation precautions was formed to help users better complete the installation of Isuzu clutch friction plates, ensuring installation quality and the normal operation of the clutch.