430mm Pull‑type Diaphragm Spring Clutch Pressure Plate Assembly

The OE part number is AZ9725160100. This 430mm Pull‑type Diaphragm Spring Clutch Pressure Plate Assembly (Large Bore) is the core force‑bearing and power transmission component of heavy‑duty truck transmission system. It is installed on the engine flywheel, matched with clutch disc and release bearing to undertake engine torque output. It relies on high‑precision diaphragm spring clamping force to realize stable connection and complete disconnection of power between engine and gearbox, ensuring smooth vehicle starting, accurate gear shifting and stable driving power output. It effectively solves common clutch system faults caused by spring fatigue, pressure plate deformation, surface ablation and elastic attenuation of old assemblies, such as heavy‑load clutch slipping, incomplete clutch separation, difficult gear shifting, gear grinding noise, insufficient power acceleration and abnormal clutch friction noise. Long‑term failure will further cause clutch disc burning, flywheel surface wear and even transmission power loss, seriously affecting driving safety. This premium 430mm pull‑type large‑bore clutch pressure plate can thoroughly eliminate these typical failure risks for Sinotruk HOWO heavy‑duty trucks. It adopts integral high‑strength ductile iron casting structure and high‑precision diaphragm spring assembly with overall pressure calibration treatment. The precisely processed spring structure maintains uniform and stable clamping pressure under long‑term operation. It keeps reliable power transmission performance under long‑time heavy‑load climbing, frequent start‑stop switching and complex bumpy road conditions. Factory‑calibrated mounting hole spacing, overall outer diameter and large‑bore inner hole size support direct plug‑and‑play installation, keeping tight fitting and stable pressure output without offset or pressure deviation under intense vehicle vibration.

① Applicable vehicle models​
Suitable for Sinotruk HOWO series heavy trucks equipped with 430mm pull‑type clutch system, including logistics tractors, bulk cargo transport vehicles, engineering dump trucks and long‑haul transportation heavy‑duty vehicles. Widely applied for after‑sales maintenance, fleet overhaul and spare parts stocking projects.​
② Adaptation System​
Belongs to HOWO Transmission System, sub‑category of clutch core transmission parts. Precisely matches original engine flywheel, clutch housing, clutch disc and release bearing assembly. Fits installation cavity perfectly without drilling, cutting or any modification to vehicle structure. No extra debugging needed, ready for direct installation after replacement.​
③ Original Factory Reference Number​
Corresponding OE Number: AZ9725160100. All products are strictly manufactured according to original factory drawing data and mold standards, achieving full dimensional consistency and 100% accurate interchangeability with genuine OEM clutch pressure plate assembly.​
④ Interchangeability​
Produced fully complying with OEM dimensional and performance criteria. Core parameters including overall outer diameter, large‑bore inner hole size, diaphragm spring elastic coefficient, clamping force value, mounting hole spacing and flatness tolerance are completely consistent with original spare parts. It can directly replace the factory clutch pressure plate assembly, greatly shortening on‑site maintenance debugging time and cutting labor service costs.​
⑤ Additional Services​
We provide professional compatibility verification based on customers' HOWO vehicle year, engine horsepower configuration and original clutch structure parameters. Meanwhile, detailed disassembly & assembly operation guidance and matching clutch disc, release bearing and clutch accessory recommendation lists are available. Our technical team offers full‑process installation support to avoid clutch slipping, incomplete separation and gear shifting jamming faults triggered by mismatched spare parts or non‑standard installation.

The pressure plate body adopts high‑strength ductile iron material, with excellent compression resistance, torsion resistance and anti‑deformation performance, capable of enduring high friction pressure and high‑temperature heat generated by frequent clutch engagement and disconnection under full‑load operation. The built‑in diaphragm spring is made of high‑quality alloy spring steel after multiple high‑temperature tempering and pressure aging treatment, featuring stable elasticity and strong anti‑fatigue performance, without permanent deformation or elastic attenuation under long‑term heavy‑load compression. The pressure surface adopts high‑precision plane processing technology, ensuring uniform contact with clutch disc and avoiding local overheating and partial slipping. The thickened fixed support lugs effectively resist cracking and loosening caused by long‑term chassis vibration. The whole unit has outstanding adaptability to heavy‑truck harsh working conditions, resisting high‑temperature friction, heavy pressure impact and complex road vibration.

The outer shell surface of the pressure plate adopts high‑temperature anti‑oxidation and anti‑corrosion coating treatment, effectively isolating erosion from dust, moisture and high‑temperature oil fume to prevent long‑term oxidation and rust. The friction working surface is precision ground to form a flat and smooth plane without burrs and deformation, ensuring uniform stress and stable friction transmission. The mounting hole inner walls are precisely reamed with smooth inner surfaces to guarantee uniform bolt locking force and prevent thread sliding and loose installation. The diaphragm spring surface is treated with anti‑oxidation protective oil to avoid spring rusting and elastic weakening caused by long‑term environmental erosion.

Integral ductile iron casting, precision CNC finishing and spring calibration assembly are completed by advanced fully automatic production equipment. Core processing procedures are finished in a constant‑temperature dust‑free workshop to eliminate internal casting stress of the workpiece and avoid later structural deformation and pressure instability during vehicle operation. Key indicators such as overall dimension tolerance, pressure plate flatness, spring clamping force uniformity, working flatness and fatigue resistance are inspected piece by piece with professional precision testing equipment. All finished products pass 100% full inspection before delivery, covering appearance defect detection, full‑plane pressure calibration test, high‑low temperature heat cycle test and long‑time high‑frequency clutch fatigue durability test. Each batch of goods is screened per OEM standards to fully meet heavy‑load power transmission and long‑service‑life requirements of HOWO heavy truck clutch transmission system.

We are equipped with professional ductile iron casting production lines and complete clutch performance testing equipment, with mature standardized stable production processes. Sufficient monthly output and abundant finished product stock can fully support batch wholesale, spot delivery and global export orders. We also provide customized services including OEM part number marking, neutral export packaging and special surface process treatment, as well as sample trial production. We fully satisfy personalized procurement and matching demands of global auto parts distributors, repair shops and fleet purchasers.

Q: Compared with ordinary aftermarket clutch pressure plates, what core advantages does this AZ9725160100 pressure plate have?​
A: It is manufactured strictly following OEM standards with stable full‑plate clamping force, high‑temperature resistant ductile iron shell and anti‑fatigue alloy diaphragm spring. It adapts to full‑load heavy‑duty driving and frequent clutch operation of HOWO heavy trucks, effectively avoiding clutch slipping, incomplete separation, spring fatigue deformation and premature failure, providing long‑term stable power transmission protection for the vehicle transmission system.​
Q: Is the product quality reliable? What is its service life?​
A: All products are produced in accordance with original factory technical specifications and pass multiple rounds of professional pressure fatigue and high‑temperature durability tests. Under standard normal driving and maintenance conditions, its service life reaches 3–5 years. It is specially customized for harsh working scenarios of heavy trucks, engineering vehicles and long‑distance logistics transportation, with stable quality and outstanding cost performance.​
Q: What practical benefits can replacement with this clutch pressure plate bring?​
A: It completely restores the original stable power transmission performance of the vehicle clutch system, solves typical faults including heavy‑load slipping, difficult gear shifting, power attenuation and abnormal friction noise. It ensures complete separation and tight combination of clutch during daily driving, improves vehicle driving smoothness and transportation safety, and avoids frequent repeated maintenance and high replacement costs caused by clutch system failure, effectively reducing overall vehicle operation and maintenance expenses.

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