Product Introduction

• Structure: Precision-machined from high-strength cast iron or aluminum alloy, featuring a flat sealing surface, integrated oil passage ports, and mounting bolt holes. Equipped with a high-temperature oil seal and a paper/metal composite gasket for leak-proof sealing.

• Key Specifications:

• Material: Cast iron / high-pressure aluminum alloy

• Sealing gasket: Oil-resistant composite material

• Mounting: 4-bolt pattern (M8/M10)

• Operating temperature: -40°C to +150°C

  • Performance: High rigidity resists oil pressure deformation; precision-machined sealing surface ensures zero leakage; corrosion-resistant surface treatment extends service life.

Core Function

1. Oil Chamber Sealing: Forms a closed pressure chamber for the oil pump, preventing lubricating oil leakage and maintaining stable oil pressure.

2. Oil Passage Guidance: Directs pressurized oil from the pump to transmission lubrication and cooling circuits.

3. Pressure Retention: Withstands internal oil pressure (up to 0.8 MPa) to ensure adequate lubrication for gears and bearings.

End Cap Of Oil Pump AZ2222240002 – SINOTRUK HW Series Gearbox

When your SINOTRUK HW series gearbox demands reliable oil pressure, every component matters — especially the oil pump end cap. The End Cap Of Oil Pump AZ2222240002 is precision-engineered to seal and support the gearbox oil pump assembly, ensuring consistent lubrication flow across all operating conditions. Built to OEM specifications, this genuine-fit part keeps your heavy-duty trucks running smoothly on highways, construction sites, and long-haul routes worldwide.

At Mettlead, we supply this critical gearbox component directly from our factory in China — giving procurement managers like you access to competitive pricing, fast lead times, and guaranteed quality without middlemen eating into your margins.

Key Features and Benefits of the Oil Pump End Cap AZ2222240002

This end cap is far more than a simple cover plate. It plays a vital role in maintaining hydraulic integrity within the HW series gearbox oil pump system. Here is what sets it apart:

• OEM-Grade Precision: Manufactured to match the exact dimensional tolerances of the original SINOTRUK AZ2222240002 specification, ensuring seamless installation without modification.
• Superior Sealing Performance: The machined mating surface provides a leak-free seal that prevents oil pressure loss, protecting internal gears from premature wear.
• High-Strength Material: Crafted from durable alloy that resists cracking, corrosion, and thermal fatigue under sustained heavy-load operation.
• Extended Service Life: Rigorous quality control ensures each end cap withstands the vibration, heat, and pressure cycles typical of long-distance trucking and off-road applications.
• Drop-In Replacement: Designed as a direct replacement part, so your maintenance crews can reduce downtime and get vehicles back on the road faster.

In other words, choosing a quality end cap for your oil pump means fewer unplanned breakdowns, lower maintenance costs, and better fleet uptime — outcomes every procurement manager values.

Technical Specifications – End Cap Of Oil Pump AZ2222240002

Application Scenarios – Where This Oil Pump End Cap Fits

The End Cap Of Oil Pump AZ2222240002 is specifically designed for the SINOTRUK HW series gearbox. It serves as a critical gearbox transmission component across multiple heavy-duty vehicle platforms:

• SINOTRUK HOWO A7 / T7H / T5G trucks equipped with HW19710 / HW19712 series transmissions
• SITRAK C7H / C5H models using HW gearbox configurations
• HOWO heavy-duty dump trucks operating in mining and construction environments
• HOWO tractor heads covering intercity and international freight corridors

Whether your fleet hauls cargo across African highways, Southeast Asian terrain, or Middle Eastern deserts, this end cap keeps the oil pump sealed tight — so your gearbox shifts smoothly under punishing conditions.

Looking for more gearbox components? Browse our full Gearbox Parts Collection or explore dedicated SINOTRUK HOWO Gearbox Parts for compatible items.

OEM/ODM Capabilities and Custom Packaging

At Mettlead, we understand that B2B buyers need more than just parts — you need a supply partner that adapts to your business model. That is exactly what we offer:

• White-Label Packaging: Receive the End Cap Of Oil Pump AZ2222240002 in neutral packaging, ready for your own brand label or regional distribution.
• Custom Packaging: Need your logo, part numbers, and barcodes printed on the box? We handle that in-house, so you can sell directly without repackaging.
• Strict Quality Control: Every batch of end caps undergoes dimensional inspection, surface quality checks, and pressure simulation before shipment leaves our facility.
• Flexible Order Quantities: Whether you need 50 pieces for a trial order or 5,000 for a container load, our production line scales to meet your demand.

Discover the full range of SINOTRUK HOWO Truck Parts available from Mettlead — all sourced with the same factory-direct advantage.

Customer Case Study – AZ2222240002 Oil Pump End Cap in Action

Earlier this year, a fleet maintenance company based in Nigeria reached out to us with an urgent requirement. They managed over 120 SINOTRUK HOWO dump trucks operating in a mining region, and multiple vehicles were experiencing oil pressure drops traced back to worn-out end caps in their HW series gearbox oil pumps.

After verifying the part number — AZ2222240002 End Cap Of Oil Pump for SINOTRUK HW Series Gearbox — our team prepared 200 units within 5 working days. We shipped via sea freight with custom-labeled packaging bearing the customer’s house brand. Upon installation, their maintenance team confirmed that oil pressure readings returned to normal and gearbox performance improved noticeably across the fleet.

The result? Zero repeat failures after 6 months of heavy-duty operation, and the customer has since reordered three additional batches. This is the kind of reliable partnership we build — one quality part at a time.

Frequently Asked Questions – End Cap Of Oil Pump AZ2222240002

What is the function of the oil pump end cap in a SINOTRUK HW gearbox?

The oil pump end cap AZ2222240002 seals the rear of the oil pump housing inside the HW series gearbox. By maintaining a closed hydraulic circuit, it ensures consistent oil pressure that lubricates gears, bearings, and synchronizers throughout the transmission. Without a properly sealed end cap, oil pressure drops — leading to accelerated gear wear and potential gearbox failure.

How do I confirm that AZ2222240002 fits my vehicle?

This end cap is designed specifically for SINOTRUK HW series gearboxes commonly found in HOWO and SITRAK heavy-duty trucks. To confirm compatibility, check your gearbox model plate (typically HW19710, HW19712, or similar designations) and match the OEM part number AZ2222240002. If you are unsure, send us your VIN or gearbox nameplate photo and our team will verify fitment for you.

What causes an oil pump end cap to fail?

Over time, continuous pressure cycling, thermal expansion, and vibration can degrade the sealing surface of the end cap. Operating in extreme temperatures or using contaminated transmission oil accelerates wear. Hairline cracks or warping will eventually compromise the seal, resulting in noticeable oil leakage or fluctuating gearbox oil pressure.

Is this end cap made from original material?

Yes. Our AZ2222240002 end cap is manufactured using OEM-equivalent high-strength alloy steel with an anti-corrosion surface treatment. Each unit passes dimensional and material hardness inspections, so it meets the same performance standard as the factory-original component.

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

Absolutely. We understand that testing quality firsthand builds confidence. Mettlead offers flexible minimum order quantities, so you can start with a trial batch of the End Cap Of Oil Pump AZ2222240002 and scale up once you are satisfied with the fit, finish, and durability.

Ready to Secure Your Supply of AZ2222240002 End Caps?

Getting the right parts at the right price should not be complicated. Whether you need a quick quote, bulk pricing, or technical confirmation for the End Cap Of Oil Pump AZ2222240002 SINOTRUK HW Series Gearbox, our team is standing by to help.

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

• Factory-direct pricing with no middlemen
• Fast response within 24 hours
• Reliable global shipping to Africa, Middle East, Southeast Asia, and beyond
• Secure, flexible payment options
• Open invitation to visit our facility for on-site inspection

Contact Us Now to request your quotation or ask any technical questions. Let us keep your fleet moving.