Product Overview

This high-precision Diesel Engine Plunger and Barrel Assembly (Part No. 5550) is a critical component for the fuel injection system of diesel truck and car engines. Designed as a direct replacement part, it ensures optimal fuel metering and injection pressure for efficient combustion. As a specialized supplier based in Shandong, China, we offer global shipping solutions, serving major markets across North America, Europe, Southeast Asia, and the Middle East with fast, reliable logistics.

Key Features & Benefits

• Premium Material: Manufactured from high-speed steel, offering exceptional wear resistance and durability against high-pressure fuel injection cycles.
• Precision Engineering: Machined to standard size specifications for a tight, leak-free seal, ensuring consistent fuel delivery and engine performance.
• Direct Replacement: Designed for easy installation as a repair or replacement part for standard diesel fuel injection pumps.
• Cost-Effective Solution: A high-quality aftermarket alternative to OEM parts, providing reliable performance without the premium price tag.
• Lightweight Design: Weighing only 0.06 kg, it minimizes shipping costs while maintaining structural integrity.

Technical Specifications

OEM Cross-Reference

This product is a direct aftermarket replacement for the following OEM part number(s):

• OEM 5550 (Primary Reference)

Note: Please verify the physical dimensions and application with your existing part to ensure compatibility, as variations may exist across different engine models.

Compatibility

This plunger and barrel assembly is designed for use in standard diesel fuel injection pumps found in:

• Engine Types: Diesel engines for trucks, cars, and light commercial vehicles.
• Vehicle Application: General diesel car and truck engines requiring a standard-size plunger.

Global Supply & Distribution

We are equipped to serve the international B2B market with efficient logistics and wholesale capabilities. Our distribution network ensures fast and reliable delivery to major industrial hubs worldwide.

• Worldwide Shipping: We ship to North America (USA, Canada, Mexico), Europe (Germany, UK, France, Italy), Asia-Pacific (Japan, South Korea, Australia), and the Middle East (UAE, Saudi Arabia).
• Fast Delivery: Standard lead times to major ports (e.g., Shanghai, Qingdao) and airports for global freight forwarding.
• Bulk Supply: With a low MOQ of 48 pieces, we support both small workshops and large-scale distributors.
• Trade Compliance: Our export experience ensures smooth customs clearance and documentation for international transactions.

Quality Assurance

We are committed to providing high-quality aftermarket parts that meet rigorous standards.

• Manufacturing Standards: Produced in a controlled environment with strict quality checks on material hardness and dimensional accuracy.
• Testing: Each batch is inspected for surface finish and fitment tolerances to ensure reliable fuel injection performance.
• Warranty: Backed by a 4-month warranty against manufacturing defects, providing peace of mind for your purchase.

FAQ

Q: Is this plunger and barrel assembly a direct fit for my engine?
A: This part (OEM 5550) is designed as a standard-size replacement for many diesel fuel injection pumps. However, we recommend you compare the dimensions (10x5x3 cm) and visual appearance with your original part. If you are unsure, please provide your engine model or pump model for cross-verification before purchase.

Q: What is the recommended installation procedure?
A: Installation should be performed by a qualified diesel mechanic. The plunger and barrel must be cleaned with diesel fuel before installation. Ensure the pump housing is free of debris. Apply a light coating of clean engine oil during assembly. Over-tightening can cause distortion; torque to manufacturer specifications. It is highly recommended to replace the entire assembly (plunger and barrel) as a matched set.

Q: How long does this plunger typically last under normal operating conditions?
A: The lifespan depends heavily on fuel quality, operating conditions, and maintenance. With high-quality fuel and regular filter changes, this high-speed steel component can provide thousands of hours of reliable service. The 4-month warranty covers manufacturing defects; proper fuel filtration is the key to maximizing longevity.