SINOTRUK HOWO Brake Drum AZ9112340006 420x185mm Rear Brake Drum

SINOTRUK HOWO Brake Drum AZ9112340006 | 420x185mm Heavy-Duty Rear Axle Component

Product Overview

The AZ9112340006 Brake Drum is a premium-grade, heavy-duty replacement component specifically engineered for SINOTRUK HOWO and other Chinese heavy-duty truck axle systems. Designed for the HC16 and AC16 drive axles, this brake drum is critical for maintaining high-torque braking performance and vehicle safety.

Manufactured using high-carbon HT250 / G3000 Gray Cast Iron, our AZ9112340006 model is built to withstand extreme thermal stress. Its optimized wall thickness provides superior heat sink capacity, preventing "brake fade" and surface cracking during heavy-load transport or steep downhill descents. Each drum is CNC-machined to ensure a perfect fit, providing fleet managers with OEM-level reliability at a competitive cost.

Vehicle Compatibility

This brake drum is a direct-fit solution for the following heavy-duty platforms:

Truck Brand: SINOTRUK (HOWO, HOWO A7, T7H, T5G).

Axle Type: HC16 / ST16 / AC16 Heavy-Duty Reduction Axles.

Axle Position: Rear Drive Axles.

Brake Configuration: SN 4218 (420mm diameter x 185mm width brake shoes). 

Application: Mining tippers, long-haul logistics trucks, and heavy-duty construction vehicles.

Technical Specifications

Accurate technical data is essential for both SEO authority and customer confidence. Here are the key dimensions for AZ9112340006:

Cross-Reference & Interchange

To ensure you are ordering the correct part for your HOWO fleet, this model is interchangeable with:

SINOTRUK: AZ9112340006 / AZ9112 340006

Related Models: AZ9100440001 (Rear Drum for specific configurations)

Aftermarket Ref: Various Chinese heavy-duty truck parts specialists.

Key Benefits

Exceptional Heat Dissipation: The specialized alloy composition allows the drum to cool rapidly, reducing thermal fatigue and protecting brake linings.

Precision Dynamic Balancing: Every drum is factory-balanced to eliminate vibration at high speeds, extending the life of your wheel bearings and tires.

Reinforced Structure: Engineered with a heavy-duty flange to maintain perfect circularity even under extreme mechanical pressure.

Stable Friction Coefficient: Fine-machined friction surface ensures quick "bedding-in" with new brake shoes for immediate stopping performance.

Anti-Rust Protection: (Optional) Treated with a protective surface finish to prevent oxidation during sea freight and early service life.

Frequently Asked Questions (FAQ)

1. Which truck models use the AZ9112340006 Brake Drum?

The AZ9112340006 Brake Drum is a high-performance OEM replacement part specifically designed for Sinotruk Howo (70t/90t mining trucks), Shacman, and Foton heavy-duty trucks equipped with STR (Steyr) axles. It is commonly used for rear axle braking systems. To ensure a perfect fit, we recommend verifying the 10-hole mounting pattern and the pilot diameter against your vehicle’s technical manual or original part stamping.

2. What makes the AZ9112340006 suitable for mining and heavy-load conditions?

Our AZ9112340006 drums are manufactured from high-strength G3000/G3500 alloyed grey iron. This material is engineered to handle the extreme mechanical stress of mining and construction environments. It features superior thermal heat capacity, allowing the drum to absorb and release heat rapidly. This prevents brake fade and structural warping, even when the vehicle is operating at maximum payload capacity on steep descents.

3. Does the AZ9112340006 Brake Drum come dynamically balanced?

Yes, every AZ9112340006 unit is factory dynamically balanced. For heavy-duty trucks, an unbalanced drum can lead to severe chassis vibrations and "pedal pulsation," which damages wheel bearings, hub seals, and tires. Our precision-balanced drums ensure a smooth, stable rotation, reducing the total cost of ownership (TCO) by extending the service life of the entire wheel-end assembly.

4. How do I identify when it is time to replace my AZ9112340006 Brake Drum?

Safety is paramount in heavy hauling. You should inspect the AZ9112340006 during every brake shoe replacement and replace it if:

Max Dia Reached: The internal diameter meets or exceeds the Maximum Diameter (Max Dia)