Product Overview

This high-performance common rail fuel injector, part number 4W7021, is engineered as a direct replacement for Caterpillar 3400 and 3408 series diesel engines. Designed for global distribution, we supply this critical component to major industrial markets worldwide, including North America, Europe, the Middle East, and Asia-Pacific, ensuring reliable performance for heavy machinery and power generation applications.

Key Features & Benefits

• Precision Engineering: Manufactured to exact OEM specifications for optimal fuel atomization, combustion efficiency, and engine power output.
• Superior Durability: Constructed from high-grade steel components to withstand extreme pressures and temperatures within modern common rail systems.
• Enhanced Performance: Delivers consistent injection timing and fuel volume, contributing to reduced emissions and improved fuel economy.
• Reliable Replacement: Provides a cost-effective solution for engine repair and overhaul, minimizing equipment downtime.
• Global Compliance: Packaged for international export with all necessary documentation for smooth customs clearance.

Technical Specifications

OEM Cross-Reference

This injector is a direct replacement for the following OEM part number:

• Caterpillar®: 4W7021

Note: Always verify part number compatibility with your specific engine serial number before purchase.

Compatibility

This fuel injector is designed for use in the following engine families, commonly found in excavators, loaders, mining equipment, and generator sets:

• Caterpillar 3400 Series Diesel Engines
• Caterpillar 3408 Diesel Engines

Global Supply & Distribution

We are a professional supplier with extensive experience in the international B2B trade of heavy equipment parts. Our logistics network ensures efficient shipping to key global markets.

• Worldwide Shipping: We export to North America, South America, Europe, the Middle East, Africa, and Asia-Pacific.
• Fast Delivery: Consolidated shipments to major ports and industrial hubs ensure timely delivery for your maintenance schedules.
• Export Expertise: All products are prepared with compliant commercial invoices, packing lists, and harmonized system codes for seamless customs processing.

Quality Assurance

Every injector undergoes rigorous quality control to meet the demanding standards of heavy-duty diesel applications.

• Manufacturing Standards: Produced using precision CNC machinery and advanced manufacturing techniques.
• Performance Testing: Units are functionally tested to verify spray pattern, flow rate, and leak integrity.
• Warranty Backed: Supported by a 4-month warranty against manufacturing defects, providing peace of mind for our B2B clients.

FAQ

Q: Is this injector a direct fit for my Caterpillar 3406 engine?
A: No. This part (4W7021) is specifically designed for the Caterpillar 3400 and 3408 engine families. The 3406 engine requires different injector part numbers. Always confirm your engine model and serial number for correct fitment.

Q: What is included in the “Neutral Packing”?
A: Neutral packing means the product is shipped in non-branded, standard industrial packaging. This is common for the global aftermarket to facilitate easy importation and is ideal for distributors and workshops who may supply multiple brands.

Q: Do you provide technical support for installation?
A> While we supply the component, installation should be performed by a qualified diesel technician. Proper installation is critical for common rail systems, including torque specifications, seal replacement, and system priming procedures to prevent damage.

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 .