Product Overview

This high-performance diesel engine fuel injector is a direct replacement for Caterpillar C-Series engines, specifically designed for the C4.2, C4.4, C6.4, and C6.6 models. As a critical component of the fuel injection system, this injector ensures optimal fuel atomization, combustion efficiency, and engine power output. Sourced from a leading manufacturer in Shandong, China, this unit is engineered for global distribution, serving major markets across North America, Europe, Asia-Pacific, and the Middle East. It is an ideal solution for heavy equipment applications, including excavators, loaders, and industrial machinery, offering a cost-effective alternative to OEM parts without compromising on quality.

Key Features & Benefits

• Precision Engineering: Manufactured from high-speed steel for superior durability and resistance to wear, ensuring a long service life under high-pressure conditions.
• 100% Professional Testing: Each injector undergoes rigorous testing for flow rate, spray pattern, and pressure calibration to guarantee consistent performance.
• Direct OEM Replacement: Designed to meet or exceed original equipment specifications, ensuring a perfect fit and seamless integration with your engine’s fuel system.
• Optimized Fuel Economy: Advanced nozzle design improves fuel atomization, leading to more complete combustion, reduced fuel consumption, and lower emissions.
• Reliable Performance: Built for demanding excavator and heavy machinery applications, providing reliable starting, smooth idling, and maximum power output.

Technical Specifications

OEM Cross-Reference

This injector is a direct cross-reference for the following genuine Caterpillar part numbers. It serves as a reliable, high-quality replacement for these OEM components:

• 326-4740
• 326-4756
• 10R7951
• 326-6090
• 10R7676

Note: While these numbers are cross-referenced, please verify your specific engine serial number for exact fitment.

Compatibility

This fuel injector is specifically designed for the following engine platforms and applications:

• Engine Models: Caterpillar C4.2, C4.4, C6.4, C6.6
• Vehicle/Equipment: Primarily used in Caterpillar excavators, backhoe loaders, and other heavy construction equipment.
• Common Applications: Cat 320D, 323D, 324D, 325D, 329D, 330D, 336D excavators and similar models using these engine platforms.

Global Supply & Distribution

We are a dedicated supplier of premium diesel engine parts with a robust global logistics network. Our commitment to fast, reliable delivery ensures minimal downtime for your operations.

• Worldwide Shipping: We ship to all continents via air, sea, and express courier (DHL, FedEx, UPS, TNT).
• Major Markets Served: North America (USA, Canada, Mexico), Europe (Germany, UK, France, Netherlands), Asia-Pacific (Australia, Japan, Singapore), Middle East (UAE, Saudi Arabia), and Africa.
• Fast Delivery: Standard stock items are dispatched within 24-48 hours. Bulk orders are shipped efficiently to major ports including Shanghai, Qingdao, and Ningbo.
• Export Compliance: We adhere to international trade regulations, ensuring all documentation (Bill of Lading, Commercial Invoice, Packing List) is accurate for smooth customs clearance.

Quality Assurance

Quality is the cornerstone of our manufacturing process. We ensure that every injector meets the highest standards of performance and reliability.

• Manufacturing Standards: Produced in an ISO 9001 certified facility, utilizing advanced CNC machining and precision assembly techniques.
• Testing: Each unit undergoes a 100% professional test, including flow bench calibration, spray pattern analysis, and pressure leak testing to ensure OEM-level performance.
• Warranty: Backed by an 8-month warranty against manufacturing defects, providing you with peace of mind and protection for your investment.

FAQ

Q1: How do I confirm if this injector (326-4756) fits my specific excavator engine?
A: While this injector is a direct replacement for the Cat C4.2, C4.4, C6.4, and C6.6 engines, we strongly recommend checking your engine’s serial number (S/N) against the OEM part numbers listed (326-4740, 10R7951, etc.). You can find the S/N on a plate attached to the valve cover or engine block. If you are unsure, please contact us with your engine S/N and machine model for expert verification.

Q2: What is the installation procedure for this injector? Are there any special tools required?
A: Installation should be performed by a qualified mechanic. The process typically involves removing the fuel line, electrical connector (if applicable), and the retaining clamp. A torque wrench is essential to tighten the injector hold-down bolt to the exact specification. We also recommend replacing the copper washer or O-rings on the injector tip to ensure a proper seal. Always refer to the Cat Service Manual for your specific engine model for detailed instructions.

Q3: What maintenance can I perform to extend the life of these injectors?
A: The most critical factor is maintaining a clean fuel system. Use high-quality diesel fuel and replace your fuel filters at the intervals specified in your operator’s manual. Contaminated fuel is the leading cause of injector failure. Additionally, avoid running the fuel tank low, as this can draw debris from the bottom of the tank into the injection system. Regular use of a fuel additive can also help lubricate the injectors and prevent carbon buildup.

Our advantages

1.An authorized wholesaler of Isuzu genuine parts, Hino genuine parts, Mitsubishi genuine parts and Mahle parts.

2. We are not only supply genuine parts, but also high quality OEM parts, which are made in China or made in Japan.

3. More than 10 years of experience in machinery parts, professional supply of diesel engine parts.

4. Fast delivery, the fastest can be shipped in one day ,more than 500,000 of different types parts in stock.

5. Scientific ERP system, easy and fast to locate the parts that customer needs.

6. Professional technician checks the parts before delivery, to make sure the parts are correct, usable and defect-free.

Exhibition

Packing&Shipping

1.  Our shipment is by air/sea/express (DHL/FEDEX/TNT/UPS/EMS).

2.  Once we get confirmation of payment, we will ship products in 2 days.

3.  Our packaging is standard export wooden box or others as your requirement.

4. We’ll check and test the products before shipping , and givethe pictures to our customers to confirm.

FAQ

Q1. What is your company major products?

A: Our main products are Liner kit, Piston, Rings, Liner, Gasket kit, Bearing, Injection pump, Nozzle, Water pump, Oil pump,Crankshaft, Turbocharger,Filter, etc.

Q2.What is the MOQ?

A: Normally we can supply any quantity if we have in stock.

Q3. What is your payment term ?

A: We accept Western Union, T/T, Paypal.

Q4. What is the packing ?

A: Carton or wooden case , If you want to put your logo on the packing , We will do it after get your authorization letter.

Q5. When can you deliver products after payment ?

A: By Express ,usually might take 3-4 days ;By Air , Usually take 7-9 days ; By Sea ,usually take 1-2 months .

Q6. What can you do to complete order perfectly ?

A: In the beginning , We will communicate with clients in details to understand what they need .

Before packing , We will check the products and send photos to clients .After confirmation ,

We will packing products well to avoid damage . Once we get tracking number ,

We will send it to customer and keep contact in with clients .