Product Introduction

• Structure: A heavy-duty, one-piece cast-iron flywheel with a precision-machined friction surface on its outer edge for clutch engagement. It features a central mounting hub with bolt holes for secure attachment to the crankshaft, and an outer ring gear (integrated or press-fit) for engine starting via the starter motor.

• Performance: The high-mass design stores kinetic energy to smooth out the pulsations of engine combustion, ensuring consistent rotational speed and reducing vibration. The hardened friction surface resists wear from clutch engagement, while the balanced construction minimizes stress on the crankshaft.

• Design: Directly interchangeable with original equipment flywheels, supplied with a precision-machined mounting surface and pre-drilled bolt holes for a perfect fit.

Core Function

1. Energy Storage & Smoothing: Stores rotational energy during power strokes and releases it during non-power strokes, maintaining a steady engine speed and reducing vibration.

2. Clutch/Torque Converter Interface: Provides a friction surface for the clutch disc or a mounting flange for the torque converter, transferring engine power to the transmission.

3. Engine Starting: The integrated ring gear engages with the starter motor pinion to crank the engine during startup.

Flywheel 1003570122 WEICHAI – OEM-Grade Engine Flywheel for Heavy-Duty Truck Applications

When your fleet depends on uninterrupted power delivery, the flywheel sitting at the heart of your WEICHAI engine cannot afford to be anything less than perfect. The Flywheel 1003570122 WEICHAI from METTLEAD Truck Parts is precision-engineered to store rotational energy, dampen torsional vibrations, and ensure smooth clutch engagement cycle after cycle. Built to meet OEM dimensional and metallurgical standards, this flywheel delivers the durability that long-haul operations demand — at a factory-direct price that protects your bottom line.

Key Features and Benefits of Flywheel 1003570122

• OEM-Matched Specifications – Manufactured to the exact dimensional tolerances and material hardness required by WEICHAI engine assemblies, ensuring drop-in fitment with zero modification.
• High-Grade Cast Iron Construction – Premium gray cast iron (HT250 equivalent) provides superior heat dissipation, vibration damping, and resistance to thermal cracking under sustained load.
• Precision-Machined Friction Surface – The clutch mating face is ground to a surface roughness of Ra 1.6 μm or finer, promoting even clutch disc contact and extending clutch life.
• Balanced for Smooth Operation – Each flywheel undergoes dynamic balancing to minimize engine vibration, reduce bearing wear, and protect downstream drivetrain components.
• Ring Gear Pre-Installed – Heat-shrunk starter ring gear with hardened teeth (58–62 HRC) is factory-fitted, saving assembly time and ensuring reliable engine cranking.
• Strict Quality Control – 100% dimensional inspection, hardness testing, and balance verification before shipment — because a failed flywheel means a truck off the road.

Technical Specifications

Note: Exact specifications may vary by engine sub-model. Our technical team will cross-reference your VIN or engine nameplate data to confirm compatibility before shipment.

Application Scenarios – Where This Flywheel Performs

The Flywheel 1003570122 is designed to serve the demanding environments where WEICHAI-powered trucks operate daily:

• SINOTRUK HOWO A7 / T7H – Long-haul logistics across Africa, Southeast Asia, and the Middle East where sustained highway speeds demand flawless energy storage and clutch engagement.
• SHACMAN F3000 / X3000 – Mining and construction haulage where high-torque, low-RPM operation subjects the flywheel to extreme torsional loads.
• FOTON Auman GTL – Regional distribution fleets requiring frequent stop-start cycles that test clutch-flywheel interface durability.
• SITRAK C7H – Premium heavy-duty tractors where NVH (noise, vibration, harshness) standards require precisely balanced rotating assemblies.

Whether your trucks are hauling containers out of port, moving aggregate from quarry to plant, or running intercity freight corridors, this flywheel keeps the powertrain rotating with confidence.

OEM / ODM Capability

METTLEAD Truck Parts operates as a factory-direct supplier with full white-label and custom packaging capabilities. Here is what that means for your procurement operation:

• White-Label Packaging – Ship under your own brand identity. We supply neutral boxes or print your logo, part numbers, and barcodes directly on packaging.
• Custom Specifications – Need a modified bolt pattern, alternative ring gear tooth count, or specific surface treatment? Our engineering team can adapt production to your requirements with MOQ discussion.
• Consistent Batch Quality – Every production run follows the same inspection protocol: CMM dimensional checks, Brinell hardness verification, and dynamic balance reporting with certificates available on request.
• Flexible Order Volumes – From sample orders for testing to full container loads for distribution, we scale to match your inventory strategy.

Frequently Asked Questions – Flywheel 1003570122 WEICHAI

What engines does Flywheel 1003570122 fit?

Flywheel 1003570122 is primarily designed for WEICHAI WP10 and WP12 series diesel engines commonly found in SINOTRUK, SHACMAN, and FOTON heavy-duty trucks. Because WEICHAI uses this part number across several engine variants, we always recommend confirming your engine nameplate data or VIN before ordering to guarantee exact fitment.

How does this flywheel handle high-torque applications like mining trucks?

The HT250 cast iron body is specifically chosen for its ability to absorb and dissipate heat generated during heavy clutch engagement. Combined with G6.3 dynamic balancing, the flywheel resists thermal cracking and fatigue even under the repeated high-load cycles typical in mining and construction haulage.

Is the starter ring gear included and pre-installed?

Yes. Every Flywheel 1003570122 ships with the ring gear heat-shrunk onto the flywheel body. The teeth are induction-hardened to 58–62 HRC, ensuring reliable starter motor engagement across thousands of engine start cycles.

What quality inspections does this flywheel undergo before shipping?

Each unit passes through a multi-point inspection process: dimensional verification on CMM equipment, Brinell hardness testing of the body and ring gear, surface roughness measurement of the clutch face, and dynamic balance testing. Inspection reports can be provided upon request for bulk orders.

Can I order a sample of Flywheel 1003570122 before committing to volume?

Absolutely. We encourage procurement managers to evaluate fit, finish, and material quality firsthand. Sample orders ship within 3–5 business days, and our team provides full technical documentation alongside the part for your QC review.

How should I store the flywheel before installation?

Store in a dry, temperature-stable environment. The machined friction surface is coated with a rust-preventive oil film at the factory. Avoid removing this film until installation. If stored for extended periods (over 6 months), inspect the surface and re-apply a light anti-corrosion coating if needed.

Ready to Secure Your Supply of Flywheel 1003570122 WEICHAI?

Your fleet uptime depends on parts that arrive on spec, on time, and at a price that makes sense for your operation. METTLEAD Truck Parts delivers exactly that — factory-direct pricing, rigorous quality control, and a technical team that speaks your language.

Get a competitive quote today. Send us your engine model, required quantity, and delivery destination. We will respond with pricing, lead time, and shipping options within 24 hours.

👉 Contact Us Now to Request a Quote

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