Product Introduction

Structure

This balance shaft with housing is a pre-assembled integral suspension unit for heavy-duty trucks. It consists of a high-strength forged steel balance shaft, precision rolling bearings, seals, and a heavy-duty cast ductile iron housing as one integrated assembly. The housing features mounting flanges with machined holes for chassis installation, built-in bearing seats, and oil seal grooves for dustproof and lubrication retention. The whole assembly is treated with anti-corrosion coating, with the part number clearly marked for OE matching.

Performance

The balance shaft is made of forged alloy steel with quenching and tempering treatment for high strength and fatigue resistance. The housing adopts high-performance ductile iron with strong rigidity and shock resistance. The matched bearings and seals ensure stable rotation, low noise, and long service life under heavy load and vibration. The assembly works reliably in -40°C to 120°C environment, with good salt spray resistance and aging resistance.

Core Function

1. Integrates balance shaft, bearings and housing into one unit, providing direct mounting for the rear suspension balance system.

2. Supports and positions the balance shaft, ensuring accurate swing and load distribution between two axles.

3. Reduces chassis vibration and uneven tire wear, improving vehicle stability and safety under full load.

4. Simplifies installation and maintenance, improving repair efficiency and prolonging the service life of the suspension system.

Balance Shaft With Housing WG9925520233 – Genuine Sinotruk Replacement Part

When your heavy-duty Sinotruk fleet demands reliable suspension performance, every component matters — especially the balance shaft. The Balance Shaft With Housing WG9925520233 is a precision-engineered chassis component designed to stabilize the vehicle body and absorb road vibrations under extreme payloads. Built to OEM specifications, this assembly ensures your trucks keep running smoothly across the toughest terrains, ultimately reducing downtime and maintenance costs for your fleet operations.

At Mettlead, we supply this genuine Sinotruk balance shaft assembly directly from our China-based factory network, which means you get competitive wholesale pricing without compromising on quality. Whether you are a parts distributor in Africa, the Middle East, or Southeast Asia, we are ready to fulfill your bulk orders with fast, dependable logistics. Explore our full range of Sinotruk HOWO truck parts to expand your inventory with confidence.

Key Features and Benefits of Balance Shaft With Housing WG9925520233

This balance shaft assembly is far more than a simple mechanical linkage. It plays a critical role in your truck’s rear suspension system, and here is why it stands out:

• Superior Load Balancing: The balance shaft evenly distributes axle loads between the tandem rear axles, preventing uneven tire wear and enhancing overall driving stability.
• Integrated Housing Design: Unlike standalone shafts, this unit comes pre-assembled with its housing, which simplifies installation, reduces labor time, and minimizes the risk of misalignment during fitting.
• Vibration Dampening: Engineered to absorb and cushion road shocks, the WG9925520233 balance shaft protects the frame and cargo from excessive vibration, extending the service life of surrounding suspension components.
• OEM-Grade Material: Manufactured using high-strength alloy steel and precision casting techniques, this part meets the original Sinotruk factory standards for hardness, fatigue resistance, and dimensional accuracy.
• Corrosion-Resistant Finish: The housing features a protective surface treatment that withstands harsh operating environments, including muddy roads, salt exposure, and humid climates.
• Direct Bolt-On Fitment: As a genuine OEM-numbered part, the WG9925520233 drops directly into the designated mounting points — no modifications or adapters needed.

In short, choosing this balance shaft assembly means fewer warranty claims for your customers, faster workshop turnaround times, and stronger profit margins for your wholesale business. For more chassis-related components, browse our complete chassis parts catalog.

Application Scenarios – Vehicle Fitment and Working Conditions

The Balance Shaft With Housing WG9925520233 is specifically designed for Sinotruk HOWO heavy-duty trucks equipped with tandem rear axle configurations. Here is how it performs in real-world conditions:

Fitted Vehicle Models

• Sinotruk HOWO A7 6×4 Dump Trucks
• Sinotruk HOWO 8×4 Cargo Trucks
• Sinotruk HOWO Mining Trucks (Tandem Rear Axle)
• SITRAK C7H Series with Matching Rear Suspension

Functional Role in the Suspension System

Mounted between the two rear axles, the balance shaft with housing acts as a pivoting link that allows both axles to articulate independently while maintaining equal ground pressure. Consequently, when the truck travels over uneven terrain or potholes, one axle can rise while the other remains grounded — this prevents the chassis from rocking violently and protects both the driver and the cargo.

Furthermore, during heavy braking or acceleration, the balance shaft transfers reactive torque smoothly between the axle assemblies, reducing stress concentrations on the leaf springs and frame cross-members. As a result, fleets operating in mining, construction, and long-haul transport environments experience fewer suspension failures and longer service intervals.

Looking for parts across multiple Sinotruk systems? Visit our comprehensive Sinotruk truck parts page for a full overview of available components.

Technical Specifications

Note: Dimensions and weight may vary slightly by production batch. Please confirm your truck’s VIN or chassis number with our team to ensure an exact match before ordering.

OEM/ODM Capability – Tailored to Your Market

As a wholesale buyer or regional distributor, you need more than just parts — you need a supply partner who adapts to your brand strategy. Mettlead offers flexible OEM and ODM services that give you a competitive edge in your local market:

• White-Label Packaging: Receive the WG9925520233 balance shaft assembly in plain, unbranded boxes — perfect if you sell under your own private label.
• Custom Branded Packaging: We can print your logo, part number, and branding elements directly on the box and labeling, helping you build brand recognition with every delivery.
• Strict Quality Control: Every unit undergoes dimensional inspection, hardness testing, and surface finish verification before shipment. We maintain full traceability records, so you can confidently back your products with warranties.
• Flexible Order Quantities: Whether you need a trial order to test the market or a full container load, our production capacity scales to meet your requirements.
• Factory Visit Welcome: We openly invite potential partners to visit our facilities in China, inspect the production line, and verify quality processes firsthand.

Ultimately, our goal is to help you grow your business by offering dependable products at factory-direct pricing. If you are ready to discuss volume discounts or custom packaging details, do not hesitate to contact us directly.

Frequently Asked Questions – Balance Shaft With Housing WG9925520233

What exactly does the balance shaft with housing do on a Sinotruk HOWO truck?

The balance shaft sits between the tandem rear axles and acts as a pivoting equalizer. Essentially, it allows the two axles to move independently over rough surfaces while keeping the load evenly distributed. Without it, one axle would carry excessive weight during articulation, leading to premature tire wear, spring fatigue, and even frame cracking over time.

How do I know if WG9925520233 is the correct part number for my truck?

The most reliable way to confirm fitment is by matching the OEM part number stamped on your existing balance shaft assembly. Additionally, you can provide your vehicle’s VIN or chassis plate number, and our technical team will cross-reference it against the Sinotruk parts catalog. This extra verification step prevents costly returns and ensures you receive the right component.

What are the common signs that a balance shaft with housing needs replacement?

There are several telltale symptoms to watch for. First, you may notice uneven tire wear on the rear axles, which suggests unequal load distribution. Second, excessive bouncing or swaying at the rear of the truck — especially when loaded — often points to a worn or cracked balance shaft bushing. Third, visible cracks or deformation on the housing itself indicate the unit has exceeded its fatigue life. Finally, unusual clunking or knocking noises from the rear suspension during low-speed maneuvers are a strong indicator of balance shaft failure.

Is this balance shaft assembly sold as a complete unit or do I need to purchase the housing separately?

The WG9925520233 comes as a complete pre-assembled unit — the shaft and housing are supplied together. This integrated design saves installation time and ensures perfect alignment between the shaft and its bearing surfaces, which is critical for long-term durability.

What material is the balance shaft made from, and how does it handle heavy loads?

The shaft itself is forged from high-strength alloy steel that undergoes heat treatment for optimal hardness and fatigue resistance. Meanwhile, the housing is manufactured using precision-cast iron, which provides excellent rigidity and vibration dampening. Together, these materials allow the assembly to handle the extreme forces generated by fully loaded Sinotruk trucks operating in mining, construction, and long-haul environments.

Can I install this balance shaft assembly without specialized tools?

Since the WG9925520233 is a direct bolt-on replacement, it does not require any special jigs or machining for installation. However, you will need a hydraulic jack or lift to support the rear axles, along with standard heavy-duty hand tools. We recommend following the Sinotruk workshop manual torque specifications for all fasteners to ensure proper clamping force and safe operation.

Ready to Stock the Balance Shaft With Housing WG9925520233?

Your customers depend on you for quality parts, and you deserve a supplier who delivers consistently. With Mettlead, you gain access to factory-direct pricing, rigorous quality inspection, and a dedicated team that understands the Sinotruk parts ecosystem inside and out.

Here is how to get started:

1. Request a Quote: Tell us your required quantity and destination country — we will respond with competitive pricing within 24 hours.
2. Confirm Specifications: Our team verifies part number compatibility and discusses packaging preferences.
3. Place Your Order: Enjoy flexible, secure payment methods and real-time shipment tracking.

Do not let your inventory run low on critical suspension components. Contact us now to request your wholesale quote for the Balance Shaft With Housing WG9925520233 and discover why distributors worldwide choose Mettlead as their trusted Sinotruk parts supplier.