420x250mm Mining Truck Brake Drum WG9761349001 Extra Wide Rear Axle Parts

Product Specification

SINOTRUK HOWO Brake Drum WG9761349001 | 420x250mm Extra-Wide Rear Axle Component for Mining Trucks

Product Overview

The WG9761349001 Brake Drum is a heavy-duty, extra-wide replacement part specifically engineered for SINOTRUK HOWO and other Chinese heavy truck platforms. Designed for HC16/AC16 strengthened axles, this drum features a massive 250mm friction width, making it the ideal choice for mining dump trucks and vehicles operating under extreme payloads.

Manufactured from high-carbon HT250 (G3000) grey cast iron, our WG9761349001 model is optimized for maximum thermal capacity. Its reinforced structure prevents thermal expansion and cracking under the high temperatures generated by continuous downhill braking in mining environments. Every unit is CNC-machined for a precise fit, ensuring OEM-level reliability and safety.

Vehicle Compatibility

This brake drum is a direct-fit solution for specialized heavy-duty and mining configurations:

Truck Brand: SINOTRUK (HOWO, HOWO A7, HOWO Mining Trucks/Tippers).

Axle Series: HC16 / AC16 / STR Strengthened Reduction Axles. 

Axle Position: Rear Drive Axles.

Application: Mining tippers (Mine over-load trucks), heavy-duty construction vehicles, and extra-heavy-load logistics trailers.

Technical Specifications

Precision dimensions are the foundation of technical SEO and customer confidence:

Cross-Reference & Interchange

Ensure fitment accuracy by cross-referencing with these industry reference numbers:

SINOTRUK: WG9761349001 / WG9761 349001

Interchange: AZ9761349001 (Common interchangeable part number)

Alternative Ref: WG9231342006 (Standard 185mm version, please verify width)

Key Benefits

Extra-Wide Friction Surface: The 250mm width provides a larger contact area, significantly increasing braking torque and improving heat dissipation for over-load conditions.

Heavy-Duty Mining Grade: Engineered with a thicker flange and wall to resist deformation under extreme mechanical stress.

Precision Dynamic Balancing: Each drum undergoes rigorous factory balancing to eliminate vibration at low and high speeds, protecting wheel bearings and hubs.

Superior Wear Resistance: High-carbon metallurgy results in a lower wear rate, extending maintenance intervals and reducing the Total Cost of Ownership (TCO).

Ready for Extreme Environments: Ideal for dust-heavy and high-temperature mining sites where braking reliability is non-negotiable.

Frequently Asked Questions (FAQ)

1. Which axle models is the WG9761349001 Brake Drum compatible with?

The WG9761349001 Brake Drum is a specialized replacement part designed for Sinotruk HOWO heavy-duty trucks equipped with HC16 reduction axles. It is a common fit for 6x4 and 8x4 dump trucks, mining trucks, and tractor units. We recommend verifying the 10-hole mounting pattern and the specific flange height to ensure a precise OEM-standard fit for your HC16 hub assembly.

2. How does the WG9761349001 handle extreme heat during mining operations?

Constructed from high-carbon G3000 alloyed grey iron, the WG9761349001 is built for maximum thermal absorption. This material grade is essential for heavy-duty applications because it prevents brake fade and resists heat checking (small surface cracks). The thickened casting design helps dissipate heat quickly, maintaining consistent braking torque even under full-load mountainous descents typical of mining environments.

3. Is the WG9761349001 Brake Drum dynamically balanced?

Yes, every WG9761349001 unit undergoes rigorous dynamic balancing before leaving the factory. For heavy-duty trailers and trucks, an unbalanced drum can lead to severe vibrations that damage wheel hubs, ABS sensors, and tires. Our precision balancing ensures a smooth rotation, extending the service life of the entire wheel-end assembly and reducing overall vehicle downtime.

4. What is the maximum wear limit (Max Dia) for the WG9761349001?

Safety is our priority. Every WG9761349001 brake drum has its Maximum Diameter (Max Dia) limit cast or stamped onto the outer rim. Since this drum is often used for heavy-tonnage loads, it is critical to measure the inner diameter during every lining change. If the wear exceeds the specified limit, the drum’s ability to dissipate heat and withstand pressure is compromised, and it should be replaced immediately.