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The reliable transfer of engine power in a heavy-duty truck hinges on the integrity of the clutch assembly. A core component within this system is the friction plate, responsible for creating the essential grip between rotating elements. The SHACMAN 199000340068-WX Riveted Upper Friction Plate is a precision-manufactured part designed to deliver consistent performance under extreme pressure and heat. As a crucial element within the official catalog of Shacman truck parts, this plate ensures smooth engagement, effective torque transfer, and long service life. Its failure can lead to drivability issues and costly downtime, making the genuine 199000340068-WX component a vital part of any clutch repair or overhaul kit for SHACMAN vehicles.
Riveted Upper Friction Plate
Верхняя приклепанная фрикционная пластина
This specific part is classified as an “upper” plate, denoting its position within a multi-plate clutch assembly commonly used in commercial trucks for higher torque capacity. It consists of a robust steel core plate that features a splined center hole. This spline meshes with the grooves on the transmission’s input shaft, allowing the plate to slide along the shaft while rotating with it. High-performance friction material segments are permanently affixed to both sides of the steel core using heavy-duty rivets.
During clutch operation, this plate is compressed between the flywheel and the pressure plate (or against other friction plates). The riveted friction material creates the necessary high-coefficient surface to transmit engine torque to the gearbox. The “riveted” construction is key for heavy-duty applications, as it securely anchors the friction material to withstand shear forces and extreme heat that could cause bonded materials to detach. The design of the 199000340068-WX plate often includes cushioning segments or marcel springs to dampen engagement shocks and promote smoother gear changes.
The performance of this clutch component is defined by strict engineering parameters. The following table outlines the critical specifications that ensure compatibility and durability for the SHACMAN Riveted Upper Friction Plate.
| Specification Category | Value / Description | Impact on Performance |
|---|---|---|
| Official Part Number | 199000340068-WX | Ensures exact OEM compatibility with specific SHACMAN clutch housings and release systems. |
| Construction Type | Riveted, Cushioned Drive Plate | Rivets provide ultimate material security; cushioning reduces gear engagement shock and noise. |
| Core Material | Alloy Steel (Heat-Treated) | Provides exceptional strength to resist warping and distortion under high thermal and mechanical load. |
| Friction Material | Ceramic-Organic Hybrid Compound | Offers high heat tolerance, consistent friction coefficient, and extended life compared to standard organic materials. |
| Spline Specification | Precision-Ground, Hardened | Ensures smooth axial movement on the input shaft with minimal wear over time, preventing sticking or binding. |
| Diameter & Thickness | Model-Specific (e.g., 350mm dia.) | Critical dimensions that must match the clutch housing and pressure plate for proper clamping force distribution. |
| Thermal Capacity | Designed for Sustained High Heat | The material composition resists fading and glazing even during prolonged slippage or heavy starts. |
The friction material formula is developed specifically for SHACMAN’s engine torque profiles and vehicle weights. This ensures maximum grip without excessive pedal pressure, leading to efficient power transfer, reduced clutch slip, and better overall fuel economy. The plate maintains its holding power throughout its lifespan.
The inclusion of cushioning devices or a waved spring design in the plate assembly absorbs torsional vibrations from the engine. This dampening effect significantly reduces noise, harshness, and vibration (NVH) during clutch take-up, resulting in smoother starts and a more comfortable driving experience for the operator.
Superior materials and construction directly translate to longer life. The genuine 199000340068-WX plate resists wear, cracking, and heat spotting more effectively than many aftermarket alternatives. This durability means fewer clutch replacements over the vehicle’s lifetime, reducing total operating costs and vehicle downtime for maintenance.
This is the primary indicator. The engine revolutions will rise without a proportional increase in road speed, particularly noticeable when accelerating or climbing a grade. It feels as if the clutch is not fully engaged. This occurs when the friction material on the plate is worn too thin to maintain adequate clamp force.
If the clutch drags (does not fully release), shifting gears becomes hard and is often accompanied by grating sounds. This can be caused by a warped plate that fails to separate cleanly, or by a worn spline that hinders the plate’s free movement on the shaft. It necessitates immediate inspection.
A shuddering or chattering feeling when engaging the clutch from a stop often points to oil contamination, hot spots, or uneven wear on the friction surface. A persistent burning smell, especially in stop-and-go traffic, indicates excessive slippage and overheating, which is damaging the friction material of the plate.
Replace as a Complete Set: The friction plate operates as part of a system. Installing a new 199000340068-WX plate against a worn pressure plate or flywheel will lead to rapid, uneven wear and premature failure. Always install a full clutch kit that includes the pressure plate, release bearing (throw-out bearing), and pilot bearing. Resurface or replace the flywheel as necessary.
Impeccable Cleanliness and Alignment: Any trace of grease or oil on the friction surface will contaminate it and cause slippage. Clean all mating surfaces meticulously. Ensure proper alignment when installing the clutch disc and pressure plate; a misaligned clutch will not release fully, causing shift problems and immediate damage. Use a proper clutch alignment tool.
Respect the Break-In Period: A new clutch requires a gentle break-in of roughly 500 to 1000 kilometers. Avoid heavy towing, rapid starts, and high engine loads during this period. This allows the friction materials to gradually seat against the flywheel and pressure plate, establishing an even contact pattern and maximizing the service life and performance of the entire assembly, including your new genuine SHACMAN plate.
The SHACMAN 199000340068-WX Riveted Upper Friction Plate is a precision component where quality directly dictates drivetrain reliability and operating costs. Choosing the genuine OEM part guarantees the exact specifications, material integrity, and performance characteristics required by your SHACMAN truck’s engineering. It is a definitive investment in preventing unexpected breakdowns, ensuring driver satisfaction, and maintaining the vehicle’s productivity. When servicing the clutch system, prioritize a complete kit replacement and always specify the correct part number—199000340068-WX—to secure the longevity and smooth operation of your commercial vehicle for miles to come.
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