Product Introduction

This precision-engineered support pin is a critical component for maintaining the alignment and stability of the shift fork shaft, ensuring smooth and precise gear shifts.

• Structure & Material: Made from high-strength alloy steel, it features a threaded body for secure installation, a smooth pivot section, and a hexagonal head for easy torque application. The surface has a zinc-plated (rainbow) finish for excellent corrosion resistance.

• Performance: The precision-machined pivot surface ensures low-friction rotation, while the threaded design locks the pin securely in place, preventing movement or loosening under vibration.

• Durability: The hardened steel construction and corrosion-resistant coating withstand high vibration and repeated load cycles, ensuring long service life even in harsh operating conditions.

Core Function

1. Pivot & Support: Provides a stable, low-friction pivot point for the shift fork shaft, enabling smooth linear movement during gear shifts.

2. Alignment: Maintains precise alignment of the shift fork shaft, preventing binding or misalignment that could cause gear shift issues.

3. Secure Locking: The threaded design ensures the pin stays securely in place, even under high vibration, preventing premature wear or failure.

Shift Fork Shaft Support Pin AZ2229100043 – SINOTRUK HW Series Gearbox Parts

When your SINOTRUK HW series gearbox demands precision and durability, every single component matters — especially the shift fork shaft support pin. The Shift Fork Shaft Support Pin AZ2229100043 is engineered to keep your gearbox shifting smoothly under the toughest operating conditions. Sourced directly from our factory in China, this genuine-spec support pin delivers the exact fit and long-lasting performance that fleet operators and repair workshops worldwide rely on.

At Mettlead, we understand that procurement managers need more than just a part number — you need confidence in quality, competitive pricing, and fast delivery. That is exactly what we bring to the table with every SINOTRUK HW gearbox component we supply.

Key Features and Benefits of Support Pin AZ2229100043

This shift fork shaft support pin is far more than a simple fastener. It plays a critical role in stabilizing the shift fork shaft inside the HW series gearbox, ensuring accurate gear engagement and preventing premature wear on surrounding transmission components. Here is what sets this part apart:

• OEM-Spec Precision: Manufactured to match the original SINOTRUK specification AZ2229100043, so it drops right into place without modification.
• Superior Material Hardness: Made from high-grade alloy steel with appropriate heat treatment, this pin resists shearing forces and surface wear even under continuous heavy-load shifting.
• Smooth Shifting Performance: By holding the shift fork shaft in perfect alignment, it eliminates play and vibration — resulting in crisp, reliable gear changes.
• Extended Service Life: Strict quality control during production means fewer replacements, less downtime, and lower total cost of ownership for your fleet.
• Factory-Direct Pricing: Because we source and ship directly from China, you bypass multiple middlemen and get genuinely competitive unit costs.

Application Scenario – Where Does This Support Pin Fit?

The Shift Fork Shaft Support Pin AZ2229100043 is specifically designed for the SINOTRUK HW series manual transmission gearbox. This transmission family is widely used across numerous heavy-duty truck models, making this pin a high-demand maintenance and repair component.

Compatible Vehicles and Gearboxes

• SINOTRUK HOWO A7 heavy-duty trucks equipped with HW19710 / HW19712 gearbox
• SINOTRUK HOWO T7H with HW25716 transmission
• SITRAK C7H series with HW series manual gearbox
• Other SINOTRUK models utilizing HW series 9-speed, 10-speed, and 16-speed transmissions

In practice, this support pin bears the lateral load every time the driver shifts gears. Over hundreds of thousands of kilometers, the original pin can wear down, leading to sloppy shifting, increased noise, and eventually gear disengagement. Replacing it promptly with a quality-matched part like AZ2229100043 restores transmission performance to factory standards.

Looking for more gearbox components? Browse our full Gearbox Parts catalog or explore our dedicated SINOTRUK HOWO Gearbox Parts page for a complete range of transmission spares.

Technical Specifications

OEM and ODM Capabilities

Whether you run a parts distribution business, manage a fleet maintenance workshop, or operate a local truck parts store, Mettlead adapts to your branding and packaging needs. Here is how we support your business growth:

• White-Label Packaging: We can ship the Shift Fork Shaft Support Pin AZ2229100043 in plain, unbranded boxes — ready for you to apply your own brand identity.
• Custom Packaging: Need your company logo, part number labels, or specific packaging materials? Our production line accommodates custom print and packaging requirements with reasonable MOQs.
• Strict Quality Control: Every batch of support pins undergoes dimensional inspection, hardness testing, and surface quality checks before leaving our facility. This means you receive parts that meet or exceed OEM tolerances — consistently.
• Flexible Order Quantities: From sample orders for testing to container-load shipments, we scale with you.

For more information on the full range of SINOTRUK components we carry, visit our SINOTRUK HOWO Truck Parts brand page.

Customer Case Study – Shift Fork Shaft Support Pin AZ2229100043 in Action

Earlier this year, a fleet maintenance company based in East Africa reached out to us with a recurring problem: multiple HOWO A7 trucks in their 40-vehicle fleet were experiencing hard shifting and occasional gear pop-out after 300,000 km of service. Their local supplier had provided generic pins that wore out within weeks.

After analyzing their situation, we shipped a trial batch of 50 pieces of the Shift Fork Shaft Support Pin AZ2229100043 from our factory. The parts arrived within 12 days via air freight. Their workshop installed the pins across eight trucks that were showing the worst symptoms.

The result? Smooth, precise gear shifting was immediately restored. Three months and over 80,000 km later, not a single pin has needed replacement. The fleet manager subsequently placed a standing quarterly order for gearbox wear parts — including support pins, shift forks, and synchronizer rings — saving roughly 30% compared to their previous sourcing channel.

This is the kind of outcome that happens when you combine OEM-spec quality with factory-direct pricing. And it is exactly what we deliver, order after order.

Frequently Asked Questions – Shift Fork Shaft Support Pin AZ2229100043

What is the function of the shift fork shaft support pin in an HW gearbox?

The support pin acts as a locating and load-bearing element for the shift fork shaft. It holds the shaft in its correct radial and axial position inside the gearbox housing, which ensures that the shift forks engage each gear cleanly and completely. Without a properly functioning support pin, you may experience vague shifting, grinding noises, or even gear disengagement under load.

How do I know when the support pin AZ2229100043 needs replacement?

Common symptoms include increased play in the gear lever, difficulty selecting certain gears (especially under load), metallic rattling sounds from the gearbox area during shifting, and in severe cases, the transmission popping out of gear spontaneously. If you disassemble the gearbox and notice visible wear grooves, deformation, or surface pitting on the pin, it should be replaced immediately.

Is this support pin compatible with all HW series gearbox variants?

Yes, the AZ2229100043 support pin is designed as a universal fit across the SINOTRUK HW transmission family, including 9-speed, 10-speed, and 16-speed configurations. However, we always recommend confirming the part number against your specific gearbox assembly drawing or consulting with our team if you are unsure.

What material is the support pin made from, and how durable is it?

It is manufactured from high-grade alloy steel and undergoes controlled heat treatment to achieve a working surface hardness of HRC 58–62. This gives the pin excellent resistance to shear stress, wear, and fatigue — making it suitable for the demanding operating environment inside a heavy-duty truck gearbox.

Can I order a small quantity for testing before committing to a bulk purchase?

Absolutely. We welcome sample and trial orders so you can verify the fit, finish, and quality firsthand before scaling up. Simply let us know your requirements, and we will arrange a sample shipment.

Does this support pin come with any related installation hardware?

The AZ2229100043 is supplied as the individual support pin. If you also need related gearbox components — such as shift fork shafts, detent balls, springs, or circlips — we can supply those as well. Many customers order a complete shift mechanism kit for convenience.

Ready to Source Your Shift Fork Shaft Support Pin AZ2229100043?

Stop losing time and money to unreliable gearbox parts. Whether you need 10 pieces or 10,000, Mettlead delivers factory-quality SINOTRUK HW gearbox components at prices that protect your margins — and on timelines that keep your operations moving.

Here is what to do next:

1. Send us your inquiry — include the part number AZ2229100043, your required quantity, and preferred shipping method.
2. Receive a competitive quote — typically within 24 hours, complete with lead time and logistics options.
3. Approve and receive — we handle export packaging, documentation, and coordination with your freight forwarder.

Contact Us Now to request your quote or ask any technical questions about the Shift Fork Shaft Support Pin AZ2229100043 for SINOTRUK HW series gearbox. Our team is standing by to assist you.