Product Introduction

• Structure: Precision cast from high-strength HT250 gray cast iron, with an integrated mounting flange featuring 4 bolt holes for securing to the transmission housing. The inner cavity is precision-machined to match the oil pump rotor and internal gear ring, with an inlet port and outlet port for oil flow. The surface undergoes anti-rust painting to resist corrosion from transmission oil and moisture, and the flange face is sealed with a rubber gasket to prevent oil leakage.

• Performance: The rigid cast iron body maintains precise cavity dimensions under high-pressure operation, preventing rotor misalignment that would reduce pump efficiency. The precision-machined cavity ensures uniform clearance between the rotor and gear ring, maintaining stable oil pressure (0.2–0.6 MPa) across all operating conditions. The anti-rust coating and gasket seal ensure a leak-free service life exceeding 50,000 hours.

Core Function

1. Pump cavity housing: Provides a rigid, precision-machined cavity for the oil pump rotor and internal gear ring, enabling the gerotor pump to generate oil pressure.

2. Oil flow routing: Directs oil from the transmission sump (via the inlet port) to the lubrication circuit (via the outlet port).

3. Sealed mounting: The flange and gasket seal the pump to the transmission housing, preventing oil leakage into the main gearbox cavity.

Oil Pump Body AZ2222240001 – SINOTRUK HW Series Gearbox | Factory Direct Supply

Premium Oil Pump Body AZ2222240001 for SINOTRUK HW Series Gearbox

When your customers depend on you for reliable SINOTRUK gearbox parts, you need a supplier who truly understands what keeps heavy-duty trucks running. The Oil Pump Body AZ2222240001 is a critical component within the SINOTRUK HW Series Gearbox, responsible for housing the oil pump assembly and ensuring consistent lubrication pressure throughout the transmission system. Without a properly manufactured oil pump body, the entire gearbox faces premature wear, overheating, and costly downtime.

At Mettlead, we supply this genuine-quality oil pump body directly from our factory in China, offering wholesale distributors and agents unbeatable pricing, rigorous quality inspection, and the flexibility to customize packaging under your own brand. Whether you are stocking inventory for the African, Middle Eastern, Southeast Asian, or South American markets, this part is always ready to ship.

Key Features and Benefits of Oil Pump Body AZ2222240001

Understanding what makes this oil pump body stand out helps you confidently recommend it to your end customers. Here is why distributors around the world choose Mettlead for their SINOTRUK HW Series Gearbox components:

• Precision-Cast Housing: Manufactured using high-grade aluminum alloy with precision die-casting technology, this oil pump body delivers exceptional dimensional accuracy and a smooth internal finish that minimizes fluid resistance.
• OE-Matching Specifications: The part number AZ2222240001 guarantees direct fitment to original SINOTRUK HW gearbox assemblies, so there is no guesswork during installation.
• Superior Pressure Resistance: Engineered to withstand high hydraulic pressures generated within the gearbox oil circuit, this pump body maintains structural integrity even under extreme operating loads.
• Corrosion and Wear Resistance: Surface treatment processes protect the oil pump body from corrosion caused by transmission fluids, extending service life significantly.
• Factory-Direct Wholesale Pricing: By sourcing directly from Mettlead, you eliminate middlemen and enjoy higher profit margins on every unit sold.
• Strict Quality Control: Every single oil pump body undergoes dimensional inspection, pressure testing, and surface quality checks before it leaves our facility.
• White-Label and Custom Packaging: Build your own brand identity by having this part packaged with your logo, part labels, and custom box design.

Technical Specifications – Oil Pump Body AZ2222240001

Accurate specifications matter when your buyers need to verify compatibility. The table below outlines the essential parameters of this Oil Pump Body for SINOTRUK HW Series Gearbox:

Application Scenarios – Where Does This Oil Pump Body Fit?

The Oil Pump Body AZ2222240001 is specifically designed for the SINOTRUK HW Series Gearbox oil pump housing. It serves as the structural shell that encases the internal gear pump, channels transmission oil at regulated pressure, and ensures consistent lubrication of gears, bearings, and synchronizers throughout the gearbox.

Compatible Truck Models and Gearbox Types

• SINOTRUK HOWO A7 – Equipped with HW19710 transmission
• SINOTRUK HOWO 371/375/380 – Equipped with HW15710 transmission
• SINOTRUK SITRAK C7H – HW Series manual gearbox variants
• SINOTRUK Steyr King – HW gearbox platform vehicles
• Other HW Series gearbox applications – Mining trucks, dump trucks, tractor units, and concrete mixer trucks using SINOTRUK HW transmissions

In practice, this oil pump body is most commonly replaced during gearbox overhaul or when oil pressure irregularities are diagnosed. Mechanics in heavy-duty truck workshops rely on a precision-fit replacement to avoid leaks and ensure the pump operates at peak efficiency from day one.

Looking for more SINOTRUK gearbox parts? Browse our full SINOTRUK HOWO Gearbox Parts catalog for a complete range of transmission components.

OEM/ODM Capability – Build Your Brand with Mettlead

As a wholesale distributor or regional agent, your brand reputation matters. That is exactly why Mettlead offers flexible OEM and ODM services tailored to your business needs:

• Custom Packaging: We print your brand name, logo, part number labels, and barcodes on individual packaging. This creates a professional impression and builds trust with your downstream customers.
• White-Label Solutions: Prefer neutral packaging? We supply parts in clean, unbranded boxes ready for your own stickers or labels.
• Quality Certification Documents: We provide inspection reports and certificates of conformity that you can share with your clients for added confidence.
• Flexible MOQ: Whether you need a trial order of 10 pieces or a container-load shipment, we work with you to find the most cost-effective solution.
• Private Mold Development: For large-volume buyers, we can develop dedicated molds and adjust product specifications to meet unique market requirements.

Explore the full range of SINOTRUK HOWO Truck Parts available from Mettlead, and discover how partnering with us can strengthen your product lineup.

Customer Case Study – Oil Pump Body AZ2222240001 Bulk Order Success

Earlier this year, a truck parts distributor based in Nigeria reached out to Mettlead looking for a reliable source of Oil Pump Body AZ2222240001 for SINOTRUK HW Series Gearbox. Their previous supplier had been delivering inconsistent quality—some units showed porosity defects that caused oil leaks after installation, leading to warranty claims and unhappy workshop customers.

After receiving samples from Mettlead, the distributor’s technical team tested the oil pump bodies on three different HW19710 gearbox rebuilds. Every unit passed their internal pressure-hold test and installed perfectly without machining adjustments. Impressed by the consistency, they placed an initial order of 200 pieces with custom packaging featuring their own brand name and logo.

Within six months, they reordered three more times, gradually increasing their order quantity to 500 pieces per shipment. The feedback from their workshop clients was clear: zero leakage complaints, perfect fitment, and a noticeable improvement in surface finish compared to what they had been sourcing before.

“We finally have a supplier we can trust for SINOTRUK gearbox parts. The Oil Pump Body AZ2222240001 from Mettlead fits like original, and our customers stopped complaining about leaks. That alone saved us thousands in warranty costs.” — Regional Distributor, Lagos, Nigeria

Frequently Asked Questions – Oil Pump Body AZ2222240001

What is the function of the Oil Pump Body AZ2222240001 in a SINOTRUK HW gearbox?

The oil pump body serves as the structural housing for the internal gear pump inside the HW Series transmission. It channels transmission oil under controlled pressure to lubricate gears, bearings, and synchronizer rings. A cracked or worn oil pump body leads to pressure loss, insufficient lubrication, and eventually gearbox failure. Replacing it with a precision-manufactured unit like the AZ2222240001 restores proper oil circulation immediately.

How do I know if Oil Pump Body AZ2222240001 is compatible with my gearbox model?

This oil pump body is designed for the SINOTRUK HW Series Gearbox family, including HW15710, HW19710, and related variants. If your gearbox carries any of these model designations, the AZ2222240001 is a direct-fit replacement. However, if you are uncertain, simply send us your gearbox nameplate photo and we will confirm compatibility within 24 hours.

What causes an oil pump body to fail in the HW Series Gearbox?

Common causes include metal fatigue from prolonged high-pressure operation, cavitation erosion from contaminated transmission fluid, casting porosity defects in low-quality aftermarket parts, and physical damage during improper disassembly. Regular transmission oil changes and using quality-controlled parts like those from Mettlead significantly reduce failure risk.

Is this oil pump body made from the same material as the original SINOTRUK part?

Yes. Our Oil Pump Body AZ2222240001 is manufactured from high-grade aluminum alloy using precision die-casting methods that match OE production standards. The material composition, hardness, and dimensional tolerances are equivalent to the original factory part, ensuring reliable performance and long service life.

Can I order Oil Pump Body AZ2222240001 with my own brand packaging?

Absolutely. Mettlead provides full white-label and custom packaging services. You can have your brand name, logo, part number, barcode, and even installation instructions printed on the box. This service is available for bulk orders and helps you build a professional product line in your local market.

What is the minimum order quantity for this part?

Our MOQ is flexible and depends on your specific requirements. We accommodate trial orders for quality evaluation as well as large container shipments for established distributors. Contact our sales team to discuss pricing tiers based on your volume needs.

Ready to Secure Your Supply of Oil Pump Body AZ2222240001?

Stop losing time and money on unreliable suppliers. As a factory-direct source for SINOTRUK HW Series Gearbox parts, Mettlead delivers the quality, pricing, and service that serious distributors demand. Whether you need a sample for testing or want to negotiate a long-term supply contract, our team is standing by to help you grow your business.

Here is what you can expect when you work with us:

• Competitive factory-direct pricing with transparent volume discounts
• Fast, reliable shipping to any destination worldwide
• Flexible and secure payment methods
• Dedicated account support from enquiry to delivery
• Open invitation to visit our facility in China for inspection

Contact Us Now to request pricing, confirm availability, or discuss custom packaging options for Oil Pump Body AZ2222240001. Let us become your trusted partner for SINOTRUK gearbox parts supply.