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Type :
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Clutch pressure plate
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Specification :
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Single size: 43 * 40 * 6CM
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Pulley :
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Brand :
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NUOJIN
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Number :
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1312408890
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Quality :
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NEW
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Delivery time :
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30DAYS
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The installation of an Isuzu clutch friction disc must follow the core process of "Cleaning → Centering → Orientation → Torque Application → Lubrication → Reset → Bleeding → Adjustment → Testing" to ensure each step complies with specifications and avoids faults such as slipping, abnormal noise, or incomplete disengagement. Detailed steps and key points are as follows:
Park the vehicle on a flat surface, fully engage the parking brake, and place wheel chocks front and rear; turn off the engine, remove the key, and disconnect the negative battery terminal to prevent short circuits. Lift the vehicle to a suitable height using a lift or jack with safety stands to ensure sufficient working space. Maintain a clean working environment to avoid contamination of the clutch friction surface by dust or oil.
Flywheel: Check for cracks; ensure end runout ≤0.1mm. The surface must be flat without grooves—resurface or replace if out of tolerance.
Friction Disc: Ensure the friction surface is free of oil, burn marks, or exposed rivets. The damper plate side faces the pressure plate, and the "Flywheel Side" marking faces the flywheel.
Release Bearing: Rotate smoothly without jamming or abnormal noise; replace if worn—do not reuse defective bearings.
Input Shaft Splines: Check for no damage or deformation, and ensure smooth fit with the friction disc splines.
Cleaning: Thoroughly clean the flywheel surface, pressure plate mating surface, friction disc friction surface, and input shaft splines. Strictly prohibit residual oil or metal shavings.
Centering: Align the friction disc with the flywheel center using a centering mandrel to ensure full concentricity with the crankshaft (avoids difficult shifting or uneven wear).
Bolt Installation: Align the pressure plate with the flywheel locating pins, then hand-tighten all fixing bolts (usually 6) to prevent misalignment.
Torque Tightening: Use a torque wrench to tighten bolts in a cross-diagonal sequence in 2-3 stages. Example:
Stage 1: Pre-tighten all bolts to 5-10N·m;
Stage 2: Tighten to 25N·m in diagonal order (common Isuzu standard—verify with the specific model’s service manual).
Pneumatic impact wrenches are prohibited to avoid uneven bolt stress or thread damage.
One-Time Components: Replace bolts with "TORX" or "One-Time Use" markings—do not reuse.
Release Bearing: Apply a small amount of special grease to ensure smooth rotation; avoid over-lubrication (prevents grease splatter and friction surface contamination).
Clutch Fork Pivot: Lubricate the contact point between the fork and release bearing, as well as the pivot, to reduce wear.
Input Shaft Splines: After cleaning, apply a thin layer of special grease to ensure smooth sliding of the friction disc and prevent jamming.
Input Shaft Centering: Clean the transmission input shaft splines, align with the friction disc spline hole, and slowly push the transmission into place. Lightly tap the housing with a rubber mallet if needed (avoids spline damage).
Transmission Fixing: Tighten transmission-to-engine connecting bolts in a cross-diagonal sequence in stages. Reference the model’s service manual for torque values (common range: 50-70N·m).
Accessory Installation: Reinstall the drive shaft/half-shaft and transmission oil pan; fill with new transmission fluid to the specified level.
Steps: One person depresses the clutch pedal 3-5 times continuously and holds it down; the other person opens the slave cylinder bleed valve to release air, closes the valve, and the first person releases the pedal. Repeat until no air bubbles are present in the discharged fluid. Continuously replenish brake fluid during the process to prevent master cylinder air intake.
Purpose: Eliminate air in the system to avoid abnormal pedal travel or incomplete disengagement.
Standard: Adjust the push rod length to set the pedal free travel to the model’s specified range (common: 15-25mm).
Inspection: Ensure smooth pedal return without jamming. Excessive travel causes incomplete disengagement; insufficient travel leads to premature wear from prolonged half-engagement.
Start the engine, depress the clutch pedal, and shift through all gears—shifting should be smooth without gear rattle. Slowly release the pedal; the vehicle should start smoothly without slipping or shuddering.
Verify clutch performance under low-speed starting, high-speed driving, and rapid acceleration. Check for abnormal noise, incomplete disengagement, or shifting difficulties. Re-inspect installation steps if issues arise.
Prioritize Cleanliness: Keep friction surfaces and splines free of oil (causes slipping). Use lint-free cloths for cleaning to avoid fiber residue.
Precise Centering: Always use a centering mandrel—misalignment causes shifting problems or input shaft damage.
Strict Torque Compliance: Tighten all bolts to the model’s specified torque in cross-diagonal stages. Avoid impact wrenches to prevent component deformation.
Moderate Lubrication: Apply only small amounts of special grease to the release bearing and pivot points—over-lubrication contaminates friction surfaces.
Correct Component Orientation: Install the friction disc with the damper plate side facing the pressure plate and "Flywheel Side" marking facing the flywheel. Reversed installation causes incomplete disengagement.
Replace One-Time Components: Mandatorily replace one-time design bolts (e.g., flywheel bolts) to avoid fatigue failure.
Inspect Flywheel and Bearing: Ensure flywheel end runout ≤0.1mm; replace worn or defective release bearings—never reuse them.
This text is not directly excerpted from a single official document, but a technical summary compiled based on Isuzu's official service manuals, universal industry maintenance standards, and practical repair experience. The specific source composition is as follows:
Torque and Tightening Sequence: The manuals explicitly require that clutch pressure plate bolts be tightened in a cross-diagonal sequence in 2-3 stages, with a common torque value of 25N·m (subject to the specific model’s service manual). The use of pneumatic impact wrenches is prohibited.
Key Inspection Items: Emphasis is placed on the following critical checks:
Flywheel end runout must be ≤0.1mm;
One-time use bolts (e.g., flywheel bolts) must be replaced;
Worn or seized release bearings must be replaced synchronously.
Centering and Orientation: Requirements mentioned in the manuals—such as "centering with a mandrel," "component orientation markings (Flywheel Side/Pressure Plate Side)," and "hydraulic system bleeding procedures"—serve as direct bases for precautions related to cleanliness, centering, and bleeding in the content.
General Guidelines: In the automotive repair industry, the following universal operating principles are widely applied to clutch installation for all manual transmission vehicles:
Maintaining clean friction surfaces;
Applying moderate lubrication (to avoid oil contamination of clutch friction discs);
Prohibiting the use of pneumatic impact wrenches.
Parameters and Procedures: Specifications and processes such as clutch pedal free travel (15-25mm) and the two-person cooperative method for hydraulic bleeding, while not exclusive to Isuzu, comply with mainstream passenger car maintenance standards. They serve as important references for commissioning-related precautions in the content.
Model Differences: Model-specific requirements for various Isuzu vehicles (e.g., NKR, 700P, D-MAX)—such as flywheel bolt torque, release bearing models, and hydraulic bleeding steps—are derived from the official service manuals of respective models and practical operation guides in the repair field. These constitute supplementary specifications tailored to specific models.
The core basis of this technical summary is Isuzu's official service manuals, supplemented by integrated universal industry standards and practical experience to ensure accuracy and applicability. For citation purposes, it is recommended to note: "Compiled based on Isuzu's official service manuals and universal industry maintenance standards," and refer to the specific service manual of the corresponding model for precise parameters.
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