Product Overview

This high-performance common rail fuel injector is a critical component for maintaining optimal fuel delivery and combustion efficiency in heavy-duty Caterpillar diesel engines. Engineered as a direct replacement for OEM part 386-1766, this remanufactured injector is designed to restore engine performance, reduce emissions, and improve fuel economy. We supply this part globally to major industrial markets, including North America, Europe, the Middle East, and Asia-Pacific, ensuring reliable support for construction, mining, and power generation operations worldwide.

Key Features & Benefits

• Premium Remanufacturing: Each injector undergoes a complete remanufacturing process, including cleaning, testing, and replacement of all wear components to meet or exceed original performance specifications.
• Enhanced Durability: Constructed from high-grade steel, the injector body and internal components are built to withstand the high pressures and thermal stresses of common rail systems.
• Precision Fuel Metering: Ensures accurate atomization and optimal spray pattern for complete combustion, maximizing engine power output and efficiency.
• Guaranteed Fitment: Manufactured to exact OEM dimensions and tolerances for a perfect, hassle-free installation into the specified engine models.
• Cost-Effective Solution: Provides a reliable, high-quality alternative to new OEM parts, offering significant savings without compromising on performance or longevity.

Technical Specifications

OEM Cross-Reference

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

• Caterpillar®: 386-1766, 3861766, 20R-1275

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

Compatibility

This common rail fuel injector is designed for use in the following Caterpillar engine models. It is commonly found in heavy machinery, generator sets, and industrial equipment powered by these engines.

• Caterpillar 3508B Engine
• Caterpillar 3512B Engine
• Caterpillar 3516B Engine

Global Supply & Distribution

We are a professional exporter specializing in diesel engine components, with extensive experience in international logistics and trade compliance. Our streamlined supply chain ensures efficient delivery to key global markets.

• Worldwide Shipping: We ship to all major industrial regions, including North America, the European Union, the Middle East, Africa, and Asia-Pacific.
• Fast Delivery to Hubs: Consolidated shipments ensure cost-effective and timely delivery to major ports and inland logistics centers such as Rotterdam, Houston, Dubai, Singapore, and Shanghai.
• Export-Ready Packaging: All parts are packed securely in neutral, export-standard packaging to ensure they arrive in perfect condition, ready for immediate distribution or installation.

Quality Assurance

Every injector is backed by our commitment to quality and customer satisfaction.

• Rigorous Testing: Each unit is tested on advanced benches to verify flow rate, spray pattern, leak integrity, and pressure holding capability against strict performance criteria.
• Warranty: This product is covered by a 3-month warranty from the date of delivery, covering defects in material and workmanship.
• Professional Service: Our technical support team is available to assist with compatibility verification and installation guidance.

FAQ

Q1: Is this injector a direct “plug-and-play” replacement for my CAT 3512B engine?
A1: Yes. This remanufactured common rail injector is engineered to the exact OEM specifications of part number 386-1766. It is designed as a direct, bolt-on replacement, requiring no modifications for proper fitment and function in compatible 3508B, 3512B, and 3516B engines.

Q2: What is included in your remanufacturing process to ensure quality?
A2: Our remanufacturing process is comprehensive. It includes complete disassembly, ultrasonic cleaning, inspection of all components, replacement of all seals and wear items (such as nozzles and valves), precise reassembly, and final dynamic testing. This ensures each injector delivers performance and reliability matching new OEM standards.

Q3: Do you offer technical documentation or installation guidelines?
A3> While the injector is supplied ready for installation, we recommend consulting the official Caterpillar service manual for your specific engine model for detailed torque specifications, installation procedures, and system priming steps. Our support team can provide general guidance upon request to facilitate a correct and safe installation.

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 .