350mm Heavy-Duty Clutch Pressure Plate with Heat-Treated High-Strength Steel and ISO 1940-1 Grade G6.3 Dynamic Balancing for Isuzu FTR 6HE1 6HH1

A high-capacity diaphragm spring pressure plate that applies consistent clamping force to the clutch disc, ensuring reliable torque transfer from the engine to the transmission. Essential for smooth gear changes and preventing clutch slip under heavy load.

The Clutch Pressure Plate Assembly (OEM Numbers: 1-31220182-1, 1-31220-182-1 / 1312201821) is a premium-quality, direct replacement clutch cover engineered for ISUZU FTR, FSR, and F-series medium-duty trucks powered by the 6HE1 (6.5L), 6HH1 (6.5L), and compatible diesel engines, as well as cross-reference fitment for models requiring 1312203592 (1-31220359-2).

This heavy-duty pressure plate is the heart of the manual transmission clutch system, responsible for clamping the clutch disc against the flywheel to transmit engine torque to the driveline. With a 350mm diameter, this clutch cover is specifically designed for the higher torque capacity required by Isuzu's 6-cylinder diesel engines.

The unit is dynamically balanced to ISO 1940-1 Grade G6.3 standards to minimize vibration and reduce stress on the transmission input shaft and crankshaft thrust bearings. The precision cover assembly is manufactured from heat-treated high-strength steel, ensuring the diaphragm spring resists fatigue and maintains consistent clamping force.

• OE Quality: Manufactured to strict ISUZU OEM dimensional and material standards for perfect, direct-fit replacement
• 350mm Heavy-Duty Diameter: Larger size provides significantly higher torque capacity for 6-cylinder diesel engines
• Diaphragm Spring Design: Consistent, progressive clamping pressure with lower pedal effort
• Dynamically Balanced: Precision-balanced to minimize vibration and reduce stress on components
• Heat-Treated Construction: Resists fatigue, warping, and cracking under high thermal loads
• ISO/TS16949 Certified: Manufactured in certified facility meeting international automotive quality standards
• Safety-Critical Component: OE-quality replacement restores factory-safe clutch performance
• Direct Replacement: Simple bolt-on installation matching factory specifications
• Cross-Platform Compatibility: Interchangeable with 350mm clutch covers for multiple Isuzu engines
• Long Service Life: Engineered for hundreds of thousands of kilometers of heavy-duty commercial operation

• Material Verification: High-strength steel composition tested to meet JIS/SAE durability standards
• Dimensional Accuracy: Bolt hole pattern and geometry verified against OE blueprints using CMM equipment
• Diaphragm Spring Load Testing: 100% validated for proper clamping force and release characteristics
• Dynamic Balancing: Each unit tested for runout and vibration under high rotational speed
• Durability Testing: Sample units subjected to accelerated life-cycle testing (500,000+ engagement cycles)
• ISO 9001:2015 / IATF 16949 Certified: Facility meets international automotive quality management standards
• Visual Inspection: 100% inspected for cover distortion, spring cracking, and surface defects
• Packaged Safely: Anti-corrosion oil-coated, individually sealed in moisture-barrier packaging

1. Safety Prep: Park on level ground, chock wheels, disconnect battery, and allow engine to cool
2. Remove Transmission: Transmission must be removed to access clutch assembly
3. Remove Old Pressure Plate: Unbolt in diagonal pattern using clutch alignment tool
4. Inspect Flywheel: Check for scoring, cracks, warping, or hot spots
5. Clean Mounting Surfaces: Thoroughly clean with brake cleaner
6. Install New Clutch Disc: Center disc using alignment tool
7. Install New Pressure Plate: Position over disc, align dowel pins, tighten bolts in star pattern
8. Remove Alignment Tool: Verify disc remains centered
9. Reinstall Transmission: Install new release bearing, align input shaft splines
10. Adjust Clutch Pedal Free Play: Verify 5-15mm free travel before resistance
11. Test Drive: Test clutch engagement and disengagement before road testing

• Individual Packaging: Anti-corrosion oil-coated, sealed in moisture-barrier VCI bag with OE-style labeling
• Wholesale / Bulk Orders: Available in case packs of 5, 10, 20 units; pallet pricing for volume orders
• Customization: Neutral or private-label retail packaging available for volume wholesale orders
• Fast Shipping: Ready stock for immediate dispatch worldwide via express courier or sea freight
• Wholesale Support: Long-term supply agreements, tiered pricing, and drop-shipping for distributors