|
Type :
|
Clutch pressure plate
|
|
Specification :
|
|
|
Pulley :
|
|
|
Brand :
|
nuojin
|
|
Number :
|
ISC510 NDC518
|
|
Quality :
|
Remanufacture
|
|
Delivery time :
|
10 day
|
The following is the standard installation method for clutch pressure plates of Isuzu, Nissan, and Nissan Diesel trucks and buses with specifications of 410×250×438 mm. Strictly following the steps ensures installation accuracy and service life.
Park the vehicle securely, turn off the engine, engage the handbrake, place wheel chocks, disconnect the negative battery terminal, and ensure a flat and clean working surface.
Prepare tools: Torque wrench (accuracy ±3%), clutch centering tool, feeler gauge, try square, socket set, flywheel holding tool, cleaning solvent, specified lubricant (e.g., SAE 30 oil or lithium-based grease).
Verify that the new pressure plate has specifications of 410×250×438 mm, check for no deformation, cracks, or burning on the friction surface; inspect the driven disc spline, friction surface, shock absorber, and ensure the release bearing rotates without jamming or abnormal noise.
Check the flywheel runout ≤ 0.1 mm and flatness ≤ 0.05 mm; ensure the locating pins are intact and the threaded holes are not stripped.
Remove the transmission assembly, lock the flywheel with a flywheel holding tool, loosen and remove the pressure plate fixing bolts diagonally and in multiple steps, take off the old pressure plate and driven disc, and remove the release bearing and guide sleeve.
Clean the flywheel, guide sleeve, and input shaft spline to remove oil, rust, and impurities.
Clean the release bearing guide sleeve and apply specified lubricant; apply a thin layer of lubricant to the driven disc spline to ensure smooth fit with the input shaft, and strictly prohibit lubricant contamination of the friction surface.
Install the release bearing into the release fork, ensure the circlip is in place, and both ends of the release fork shaft are concentric.
Pass the clutch centering tool through the driven disc spline and position it to the flywheel center hole; confirm the driven disc is installed in the correct direction (shock absorber disc faces the pressure plate, long hub faces the transmission).
Align the pressure plate assembly with the flywheel locating pins, fit it to the flywheel end face, and ensure the assembly marks of the pressure plate and flywheel are aligned (if any).
Manually pre-tighten all pressure plate fixing bolts (usually 6–8 pieces) to ensure no jamming.
Lock the flywheel with a flywheel holding tool, and tighten the bolts step by step in 3–4 stages according to diagonal grouping (e.g., 1→4→2→5→3→6) to the specified torque: generally 25–35 N·m for Isuzu/Nissan Diesel trucks, and 35–50 N·m for buses (refer to the vehicle service manual).
Remove the centering tool, check the pressure plate runout ≤ 0.15 mm, and ensure the driven disc rotates without jamming.
Clean the transmission input shaft spline, apply a thin layer of lubricant, slowly push the transmission into place, ensure the input shaft is smoothly inserted into the driven disc spline, and avoid forced tapping.
Tighten the transmission-to-engine connecting bolts to the specified torque, install the clutch cable or hydraulic lines, and bleed the hydraulic system.
Check the clearance between the release bearing and diaphragm spring: generally 3–5 mm, achieved by adjusting the cable or push rod stroke.
Adjust the clutch pedal free travel (15–25 mm) and working travel to ensure complete disengagement, smooth engagement, and no drag or slippage.
Rotate the crankshaft to check that the clutch assembly rotates smoothly without abnormal noise; use a feeler gauge to check that the pressure plate fits evenly with the flywheel and no local clearance exceeds the standard.
Start the engine, check the clutch pedal free travel and working travel at idle speed; gently press the pedal to confirm complete disengagement and smooth gear shifting without impact; conduct a road test to check smooth starting and shifting, with no slippage, jitter, or abnormal noise.
The following are the core precautions for installing clutch pressure plates of Isuzu, Nissan, and Nissan Diesel trucks and buses with specifications of 410×250×438 mm, sorted by installation process to ensure operational compliance and assembly quality:
It is mandatory to verify the compatibility of the new pressure plate (specifications: 410×250×438 mm) with the vehicle model, check that the friction surface of the pressure plate is free of scratches, cracks, or burning, and ensure the diaphragm spring has no deformation or uneven elasticity (a spring dynamometer can be used to detect that the elasticity difference ≤ 5%).
The flywheel end face, driven disc friction surface, bolt holes, and locating pins must be thoroughly cleaned with anhydrous ethanol or a special cleaner. Residual oil, iron filings, or sealant are strictly prohibited, otherwise, it will cause clutch slippage and engagement jitter.
Check the flywheel runout (≤ 0.1 mm) and flatness (≤ 0.05 mm). If the tolerance is exceeded, the flywheel needs to be ground for repair or replaced to avoid uneven stress on the pressure plate causing deformation.
The torque wrench must be calibrated in advance (accuracy ±3%). Using an adjustable wrench or air gun to directly tighten the pressure plate bolts is prohibited (it may lead to torque loss of control and pressure plate warpage).
Only the manufacturer-specified type of lubricating grease (e.g., SAE 30 oil or lithium-based grease recommended by Isuzu) shall be used, and it shall only be applied to the driven disc spline and release bearing guide sleeve. Contact with the friction surface is strictly prohibited.
Disposable bolts (e.g., for some Nissan models) must be replaced; reuse is prohibited (the thread may fail after stretching).
The installation direction of the driven disc cannot be reversed: the shock absorber disc must face the pressure plate side, and the long spline hub end must face the transmission (reversing will cause incomplete disengagement and inability to shift gears).
A special centering tool must be used to position the driven disc to ensure the coaxiality of the driven disc with the flywheel and pressure plate ≤ 0.1 mm; otherwise, it will cause input shaft wear and clutch jitter.
The assembly marks of the pressure plate and flywheel (if any) must be strictly aligned to avoid unbalanced dynamic balance causing operational abnormal noise.
The pressure plate fixing bolts shall be tightened step by step in 3–4 stages according to the diagonal grouping sequence (e.g., 1→4→2→5→3→6) (example: initial pre-tightening at 5 N·m, second at 15 N·m, final to the specified torque). Single tightening or disorderly operation is prohibited (it may cause pressure plate deformation).
The torque value must strictly follow the vehicle model manual: 25–35 N·m for Isuzu/Nissan Diesel trucks, and 35–50 N·m for buses. Over-tightening will cause bolt breakage, while under-tightening will lead to bolt loosening and pressure plate detachment.
Ensure the circlip of the release bearing is fully clamped into the release fork slot; after installation, it should rotate without jamming or abnormal noise. Both ends of the release fork shaft shall be coated with lubricating grease to ensure smooth swinging.
A clearance of 3–5 mm must be reserved between the release bearing and the diaphragm spring (achieved by adjusting the cable or hydraulic push rod stroke). Excessively small clearance will cause constant meshing wear of the release bearing, while excessively large clearance will result in incomplete disengagement.
References：
Applicable models: 700P/600P series, Forward, Giga and other trucks; Bus series (e.g., Elf bus).
Core content: Diagonal step-by-step tightening of pressure plate and flywheel bolts, torque parameters (25–35 N·m), flywheel runout/flatness standards, driven disc direction and centering requirements, release bearing clearance (3–5 mm), replacement specifications for disposable bolts.
Access channels: Isuzu official website after-sales support, authorized dealer technical system (ISUZU Service Information System), original factory printed manuals.
Applicable models: Nissan Diesel Condor, Quon, Civilian bus, etc.
Core content: Alignment of pressure plate assembly marks, orientation of driven disc shock absorber, assembly specifications for release fork and release bearing, hydraulic system bleeding process, adjustment standards for pedal free travel (15–25 mm).
Access channels: Nissan Diesel (UD Trucks) global service system, authorized service station technical database.
Applicable models: Nissan Cabstar, Atlas and other light-duty trucks, and Nissan buses.
Core content: Flywheel flatness and runout tolerances, pressure plate bolt torque (35–50 N·m), models of special centering tools, lubrication requirements for driven disc splines.
Access channels: Nissan Motor after-sales technical platform (Nissan Technical Information System).
Related Articles
Discover what vehicles use auto starter systems and how Auto Starter car technology improves safety, convenience, and performance. Learn about manufacturer production, factory supply, and modern applications for cars, trucks, and commercial vehicles.....
Looking for a complete Auto Starter guide? This article explains how auto starters work, types, symptoms, maintenance tips, and how manufacturers and factories supply high-quality starters for global production and bulk orders.....
Learn everything about starter parts, how they work, signs of failure, maintenance tips, and how a professional manufacturer with factory production ensures stable, high-quality starter components for global vehicle owners.....
Explore the real-world Auto Starter disadvantages in industrial and automotive production. Learn how auto starter systems affect reliability, cost, maintenance, and factory manufacturing efficiency.....
Discover what a starter solenoid does in a vehicle, how it works with the starter motor, signs of failure, and why quality starter solenoid production from a professional manufacturer and factory matters for reliable performance.....
Explore common Boat Starter types and learn which marine engines they fit best. As a professional Boat Starter manufacturer with factory production and bulk supply capability, we provide reliable starting solutions for outboard, inboard, and diesel marine engin....
