420x150mm HOWO Front Brake Drum WG9112440001 SINOTRUK Truck Brake Components

Product Specification

SINOTRUK HOWO Front Brake Drum WG9112440001 | 420x150mm Heavy-Duty Truck Brake Component

Product Overview

The WG9112440001 Brake Drum is a premium-grade replacement part specifically engineered for the front axles of SINOTRUK HOWO heavy-duty trucks. Designed for 7-ton and 9-ton front steering axles, this brake drum is critical for ensuring steering stability and immediate braking response for heavy-load commercial vehicles.

Manufactured from high-quality HT250 / G3000 Gray Cast Iron, our WG9112440001 model is optimized for high thermal conductivity. Its precision-engineered design allows for rapid heat dissipation during frequent braking, effectively preventing thermal cracking and ensuring safety. Each unit is CNC-machined to exacting OEM standards, providing a perfect "plug-and-play" fit for global fleet operators and wholesalers.

Vehicle Compatibility

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

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

Axle Series: HF7, HF9 Front Steering Axles (7-ton and 9-ton series).

Axle Position: Front Wheels.

Application: Heavy-duty logistics trucks, tippers, concrete mixers, and specialized transport vehicles.

Technical Specifications

Accurate technical dimensions are essential for building customer trust and improving Google's "Product Schema" relevance:

Cross-Reference & Interchange

Ensure you have the correct part by cross-referencing with these industry numbers:

SINOTRUK: WG9112440001 / WG9112 440001

Alt. Reference: AZ9112440001 (Common interchangeable part number)

Aftermarket Ref: Various Chinese truck spare parts specialists.

Key Benefits 

Optimized for Steering Axles: Specifically balanced to prevent front-end vibration, ensuring smooth steering and vehicle control.

Excellent Heat Dissipation: The specialized high-carbon iron alloy prevents "brake fade" even under high-frequency braking in urban transport.

CNC Precision Machining: Guarantees perfect concentricity, which reduces uneven wear on brake linings and extends the life of the entire hub assembly.

Superior Durability: High-grade casting material offers exceptional resistance to thermal cracking and mechanical stress.

IATF 16949 Certified: Manufactured under strict automotive quality systems to match or exceed the performance of the original equipment.

Frequently Asked Questions (FAQ)

1. Which truck models is the WG9112440001 Brake Drum compatible with?

The WG9112440001 Brake Drum is a precision OEM-spec replacement primarily designed for Sinotruk HOWO heavy-duty trucks and vehicles utilizing Steyr (STR) rear axles. It is a standard fit for many 6x4 and 8x4 dump trucks and tractor units. To ensure a 100% perfect fit, we recommend verifying the 10-hole mounting pattern and checking the internal diameter and height against your original part number WG9112440001.

2. What material grade is used to ensure the WG9112440001 handles heavy loads?

Our WG9112440001 drums are manufactured from premium G3000 Grey Cast Iron. This material is engineered for high thermal conductivity and tensile strength, which is essential for the heavy-duty braking required in construction and mining. The high-carbon content allows for rapid heat dissipation, effectively preventing brake fade and protecting the drum from warping or "bell-mouthing" under extreme pressure.

3. Does the WG9112440001 Brake Drum come factory balanced?

Yes, every WG9112440001 unit undergoes rigorous dynamic balancing before shipment. For Sinotruk HOWO trucks carrying heavy payloads, an unbalanced drum can cause significant chassis vibration and "shudder," which leads to premature wear of wheel bearings, tires, and hub seals. Our precision balancing ensures a smooth, stable rotation and helps lower the Total Cost of Ownership (TCO) for fleet operators.

4. How can I tell when it is time to replace my WG9112440001 Brake Drum?

Maintenance safety is critical for heavy-tonnage vehicles. You should inspect the WG9112440001 and replace it 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 Heat Checking: You notice numerous radial cracks on the friction surface that are deep enough to catch a fingernail.

Scoring: Deep grooves are present that prevent proper contact between the brake shoes and the drum, reducing overall stopping power.