Product Introduction

• Structure: Precision-forged from high-strength alloy steel (40Cr), with a rigid, boxy design and precision-machined mounting surfaces. The surface is coated with anti-rust primer for corrosion resistance, and features threaded mounting holes for secure attachment.

• Key Specifications:

• Material: 40Cr alloy steel

• Mounting: 4-point bolted connection to clutch housing

• Surface treatment: Anti-rust primer coating

  • Performance: High rigidity withstands the torsion and impact forces from gearshift linkage operation; precision-machined surfaces ensure stable alignment of the gearshift mechanism.

Core Function

1. Structural Reinforcement: Adds rigidity to the front of the clutch housing, preventing deformation under heavy loads and vibration.

2. Linkage Mounting: Provides a fixed, robust mounting point for the forward gearshift linkage components, ensuring precise force transfer.

3. Alignment Support: Maintains the gearshift linkage in its correct geometric position, preventing misalignment and ensuring smooth gear changes.

Forward Gear Block AZ2214220004 – SINOTRUK HW Series Gearbox Parts

When your SINOTRUK HW series gearbox demands reliable shifting performance, the Forward Gear Block AZ2214220004 is the component that keeps everything running smoothly. This precision-engineered sliding block plays a critical role in forward gear engagement, ensuring your heavy-duty trucks shift seamlessly under the toughest operating conditions. At Mettlead, we supply this genuine-spec gearbox component directly from our factory in China — which means you get unbeatable wholesale pricing without compromising on quality.

Whether you are a parts distributor serving the African transport corridor or a fleet maintenance provider in Southeast Asia, this forward gear block is one of the most frequently replaced transmission components in the SINOTRUK HOWO and SITRAK lineups. Stocking it means faster turnaround for your customers and stronger margins for your business.

Key Features and Benefits of Forward Gear Block AZ2214220004

Precision-Engineered for the HW Gearbox

The Forward Gear Block AZ2214220004 is specifically designed to fit the SINOTRUK HW series gearbox. Every dimension, surface hardness value, and material composition matches OEM specifications. As a result, it integrates perfectly into the synchronizer assembly, delivering smooth and positive gear engagement each time the driver shifts into a forward gear.

Superior Material and Heat Treatment

Manufactured from high-grade alloy steel, this sliding block undergoes precision heat treatment to achieve optimal surface hardness. Consequently, it resists wear and deformation even after hundreds of thousands of kilometers of heavy-load operation. That durability translates directly into longer service intervals and fewer warranty claims for your customers.

Wholesale-Friendly Pricing and Supply

Because Mettlead works on a factory-direct model, there are no middlemen inflating the price. In other words, you enjoy competitive unit costs that protect your profit margins — especially at higher order volumes. We maintain stable inventory levels of this popular part number, so you will never face extended lead times.

Strict Quality Control Process

Every batch of Forward Gear Block AZ2214220004 passes through a multi-stage inspection process. This includes dimensional verification, hardness testing, and surface finish checks. Only parts that meet our rigorous standards leave the factory. Therefore, you can confidently list these components alongside OEM-branded alternatives.

Technical Specifications

Application Scenarios

The Forward Gear Block AZ2214220004 is a core transmission component for SINOTRUK HW series gearboxes. More specifically, it sits inside the synchronizer assembly and acts as the mechanical link that pushes the synchronizer sleeve into the correct gear position during forward gear selection.

This part is widely fitted in the following applications:

• SINOTRUK HOWO A7 / T7H heavy-duty trucks equipped with HW19710 or HW19712 transmissions
• SITRAK C7H tractor heads running long-haul routes with HW gearboxes
• HOWO dump trucks and mixer trucks operating in mining, quarrying, and construction environments
• SINOTRUK STEYR series vehicles with compatible HW15710 transmissions

In these demanding scenarios, the forward gear block endures constant mechanical stress from repeated gear changes. Over time, wear on the sliding surfaces can lead to imprecise shifting, gear pop-out, or grinding — all of which signal that replacement is overdue. Keeping this part in stock allows fleet operators to complete gearbox repairs quickly and reduce vehicle downtime.

Looking for more transmission components? Browse our full Gearbox Parts Category or explore the dedicated SINOTRUK HOWO Gearbox Parts page for a complete selection.

OEM/ODM Capability and White-Label Packaging

Mettlead understands that every distributor has unique branding requirements. That is why we offer flexible packaging and labeling options for the Forward Gear Block AZ2214220004:

• Neutral Packaging: Plain boxes with part numbers only — ideal for re-branding under your own label.
• Custom Packaging: Your brand name, logo, and contact details printed directly on the box. Minimum order quantities apply, but they are designed to be distributor-friendly.
• Bulk Packaging: Cost-optimized packaging for high-volume orders, reducing per-unit shipping costs.

Additionally, if you source multiple SINOTRUK gearbox components from us, we can consolidate orders and streamline your procurement process. Our team is experienced in preparing export documentation, pallet packing, and container loading to ensure your shipment arrives safely and on schedule.

For a deeper look at the full SINOTRUK parts range we carry, visit our SINOTRUK HOWO Truck Parts brand page.

Customer Case Study: Forward Gear Block AZ2214220004 for East African Distributor

One of our long-term partners — a truck parts wholesaler based in Tanzania — approached us with an urgent need. Their workshop clients were reporting frequent gear pop-out issues on HOWO dump trucks working at construction sites around Dar es Salaam. After diagnosis, the root cause was worn forward gear blocks inside the HW19710 gearbox.

The distributor ordered 500 pieces of Forward Gear Block AZ2214220004 from Mettlead. We shipped the order within 7 days via sea freight, complete with neutral packaging so the distributor could apply their own branding stickers. Upon receiving the goods, their quality team confirmed that every piece met dimensional and hardness specifications.

Within two months, the distributor sold through the entire batch and placed a repeat order for 800 units. Their feedback was clear: the AZ2214220004 forward gear blocks from Mettlead performed identically to OEM parts at a significantly lower cost. That price advantage allowed them to undercut local competitors while maintaining healthy margins.

This is exactly the kind of partnership we build at Mettlead — reliable supply, consistent quality, and pricing that helps our distributors grow their market share.

Frequently Asked Questions

What is the function of Forward Gear Block AZ2214220004 in the HW gearbox?

The forward gear block (also called the sliding block) sits within the synchronizer assembly of the SINOTRUK HW series gearbox. Its primary function is to guide the synchronizer sleeve into the correct position for forward gear engagement. When you shift into a forward gear, the shift fork pushes on this block, which in turn moves the sleeve to lock the selected gear. Without a properly functioning gear block, you may experience gear slip, grinding, or difficulty engaging gears.

How do I know when the Forward Gear Block AZ2214220004 needs replacement?

There are several telltale signs that this component is worn. First, drivers may notice that gears pop out of engagement under load — especially in higher gears. Second, you might hear a grinding noise during shifts, indicating that the block is no longer guiding the sleeve smoothly. Third, excessive play in the gear lever can point to worn sliding surfaces on the block. If any of these symptoms appear during gearbox inspection, replacing the forward gear block is a straightforward and cost-effective repair.

Is this Forward Gear Block AZ2214220004 compatible with all HW gearbox variants?

Yes, the AZ2214220004 forward gear block is designed for the SINOTRUK HW series gearbox family. This includes popular models such as the HW19710, HW19712, HW15710, and HW13710. However, because some gearbox revisions may differ slightly in internal components, we always recommend verifying the OEM part number against your specific gearbox assembly drawing before ordering in bulk.

What material is the Forward Gear Block AZ2214220004 made from?

This component is manufactured from high-grade alloy steel. After machining, it undergoes a carburizing and quenching heat treatment process. This produces a hard, wear-resistant outer surface while maintaining a tough core — the ideal combination for a part that must withstand repeated mechanical contact and high compressive forces inside the gearbox.

What is the minimum order quantity for wholesale buyers?

We keep the MOQ flexible to accommodate distributors of different sizes. For the Forward Gear Block AZ2214220004, small trial orders are welcome so you can verify quality before committing to larger volumes. Once you are satisfied, we offer tiered pricing that rewards higher quantities. Reach out to our sales team for a specific quote based on your volume needs.

Can I get custom packaging with my own brand on the Forward Gear Block AZ2214220004?

Absolutely. Mettlead supports white-label and custom packaging for all gearbox components, including the AZ2214220004 forward gear block. You provide your logo, brand name, and any text you want on the box, and we handle the rest. This service helps you build brand recognition in your local market while sourcing high-quality parts at factory-direct prices.

Ready to Stock Forward Gear Block AZ2214220004?

If you are a wholesaler, distributor, or fleet parts buyer looking for a reliable supply of Forward Gear Block AZ2214220004 for SINOTRUK HW Series Gearbox, Mettlead is your factory-direct partner. We offer competitive pricing, consistent quality, fast turnaround, and flexible packaging — everything you need to grow your parts business with confidence.

Take the next step today:

• Request a wholesale quote with volume-based pricing
• Ask about custom packaging options for your brand
• Inquire about combined orders with other SINOTRUK gearbox parts

Contact us now to get your personalized quote and start building a profitable supply chain for SINOTRUK HW gearbox components.