Heavy-Duty Brake Drum 786115M for Dongfeng Trucks | 410x220mm Rear Axle Brake Component
Product Overview
The 786115M Brake Drum is a premium-grade replacement part specifically engineered for Dongfeng (DFAC/DFCV) heavy-duty commercial vehicles. Designed for rear axle applications, this brake drum is built to provide consistent braking torque and exceptional safety under maximum payload and high-stress conditions.
Manufactured using high-density HT250 / G3000 Gray Cast Iron, our 786115M model is optimized for superior thermal management. Its advanced metallurgical composition allows for rapid heat dissipation, preventing "brake fade" and surface cracking during prolonged braking on steep descents. Each drum is CNC-machined to exacting OEM standards, ensuring a perfect fit and long-term durability for global fleet operators and distributors.
Vehicle Compatibility
This brake drum is a direct-fit solution for various heavy-duty truck platforms:
Primary Brand: Dongfeng Trucks (DFAC / DFCV).
Model Series: Dongfeng Kinland (Tianlong), T-Lift, and Kingrun (Tianjin) series.
Axle Application: Heavy-duty Rear Axles (10-stud hub configuration).
Service Environment: Optimized for long-haul logistics, heavy-duty transport, and construction vehicles.
Technical Specifications
Accurate dimensional data is essential for technical SEO and building customer confidence. Here are the key specs for 786115M:
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Feature
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Detailed Specification
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Brake Surface Diameter
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410 mm
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Friction Surface Width
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220 mm
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Total Height
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285 mm
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Centering Diameter (Pilot)
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281 mm
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Pitch Circle Diameter (PCD)
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335 mm
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Number of Holes
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10
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Bolt Hole Diameter
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24 mm
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Material Grade
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HT250 / G3000 High-Carbon Gray Iron
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Weight
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Approx. 72.0 kg
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Cross-Reference & Interchange
The 786115M can be cross-referenced with the following industry reference numbers:
Dongfeng: 786115M / 786115-M
Interchange: Suitable for select heavy-duty axles utilizing the 410x220mm drum standard.
Alternative Ref: 3502S1M (Related series for specific Dongfeng axles).
Key Benefits
Enhanced Thermal Stability: Specifically formulated to resist heat-cracking and "blue spots" under extreme heavy-load braking.
Precision Dynamic Balancing: Every 786115M drum is factory-balanced to eliminate vibration, protecting your wheel bearings and tires from premature wear.
OEM Dimensional Accuracy: CNC-machined to match original equipment tolerances for a "plug-and-play" installation.
Longer Service Intervals: Superior wear resistance reduces the frequency of replacements, lowering the Total Cost of Ownership (TCO) for fleet managers.
Certified Quality: Manufactured in compliance with ISO/IATF 16949 quality standards for consistent performance.
Frequently Asked Questions (FAQ)
1. Which vehicle models is the 786115M Brake Drum compatible with?
The 786115M Brake Drum is a high-performance OEM replacement part primarily designed for Hino heavy-duty trucks. It is engineered to meet the exact specifications of Japanese commercial vehicle axles. To ensure a 100% perfect fit, we recommend verifying the 10-hole bolt pattern and checking the pilot diameter against your vehicle's technical manual or the original part number stamped on your hub assembly.
2. How does the metallurgy of the 786115M prevent thermal cracking?
Our 786115M drums are manufactured using premium G3000-grade grey cast iron. This high-carbon material is specifically selected for its superior thermal conductivity. It allows the drum to absorb and dissipate heat rapidly during intense braking cycles, which prevents brake fade and significantly reduces the risk of "heat checking" (small radial cracks) even when the truck is carrying a maximum payload.
3. Does the 786115M Brake Drum come dynamically balanced?
Yes, every 786115M unit undergoes rigorous precision dynamic balancing before leaving the factory. In heavy-duty applications, an unbalanced drum can lead to severe chassis vibration, steering wheel "shudder," and accelerated wear on wheel bearings and tires. Our pre-balanced drums ensure a smooth, stable rotation that improves driver comfort and lowers the total cost of ownership (TCO) for fleet operators.
4. What are the signs that a 786115M Brake Drum needs replacement?
Safety is paramount in heavy hauling. You should inspect and replace the 786115M if:
The Wear Limit is Reached: The internal diameter meets or exceeds the Maximum Diameter (Max Dia) limit cast onto the drum’s exterior.
Severe Scoring: There are deep grooves on the friction surface that cannot be removed by machining without exceeding the safety limit.
Pulsation: You feel a rhythmic pulsing in the brake pedal, indicating the drum has warped or become "out-of-round" due to extreme heat.
Product Tags:
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Dongfeng Truck Brake Drum 786115M 410x220mm Rear Axle Brake Drums Images
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