Product Overview

This high-performance DPA head rotor assembly combines the critical components 7123-340S and 7180-550S with a precision-engineered Rotor No. 344S (4/8.5R). Designed for the demanding fuel injection systems of diesel engines, this unit is a direct replacement for worn or failed components in DPA (Diesel Pump Assembly) units. Sourced from a specialized manufacturer in Shandong, China, this product is available for global shipping, serving major markets including North America, Europe, Southeast Asia, the Middle East, and South America. It is ideal for B2B buyers in the automotive aftermarket, repair shops, and diesel service centers seeking reliable, drop-in replacement parts.

Key Features & Benefits

• Precision Engineering: Manufactured to exacting tolerances to ensure a perfect fit and restore original pump performance.
• High-Performance Material: Constructed from durable, wear-resistant materials to withstand high-pressure fuel injection cycles.
• Direct Replacement: Designed as a complete set (Head Rotor + Rotor) for efficient repair, reducing downtime for your customers.
• Rigorous Testing: Each unit undergoes quality checks to guarantee consistent fuel delivery and long service life.
• Cost-Effective Solution: A high-quality alternative to OEM parts, offering excellent value for volume buyers and repair shops.

Technical Specifications

OEM Cross-Reference

This product is designed to replace the following OEM and standard part numbers:

• Main Part Numbers: 7123-340S, 7180-550S
• Associated Rotor Number: 344S (4/8.5R)
• Common Application: Standard replacement for DPA (Lucas/CAV) style fuel injection pump heads.

Compatibility

This head rotor assembly is specifically designed for use in diesel engine fuel injection systems utilizing DPA (Distributor Pump Assembly) technology. It is commonly found in:

• Engine Types: Various industrial, agricultural, and automotive diesel engines.
• Vehicle Applications: Diesel engine cars, light trucks, tractors, and stationary machinery.
• System: Fuel Injection Pump (Common Rail compatible pump head).

Global Supply & Distribution

We are equipped to serve the global B2B market with efficient logistics and fast shipping. Our supply chain is optimized for international orders:

• Worldwide Shipping: We ship to all major continents and countries via air, sea, and express courier (DHL, FedEx, TNT).
• Major Markets Served: North America (USA, Canada, Mexico), Europe (UK, Germany, France, Italy), Asia-Pacific (Australia, Japan, Korea, India), Middle East (UAE, Saudi Arabia), Africa, and South America.
• Fast Delivery: Orders are dispatched within 1-3 business days to major ports and industrial centers.
• Export Experience: We have extensive experience in international trade, ensuring all documentation and customs compliance are handled professionally.

Quality Assurance

We prioritize quality to ensure our parts meet the demands of professional diesel repair:

• Manufacturing Standards: Produced in a specialized facility in Shandong, China, focusing on precision fuel injection components.
• Testing: Each head rotor is tested for dimensional accuracy and pressure integrity before packaging.
• Warranty: We offer a 4-month warranty against manufacturing defects, giving you confidence in your purchase.

FAQ

Q: How do I identify if this head rotor (7123-340S) is the correct replacement for my DPA pump?

A: First, verify the part number on your existing pump head. This unit replaces numbers 7123-340S and 7180-550S. Additionally, check the rotor number, which should be 344S (4/8.5R). If your pump uses these specific numbers and is a standard DPA (Lucas/CAV) type, this part is likely compatible. We recommend comparing the physical dimensions (height, diameter, and rotor slots) with your old unit before installation.

Q: Can I install this head rotor assembly myself, or do I need a professional?

A: Replacing a head rotor is a complex procedure that requires specialized tools and knowledge of diesel fuel injection systems. We strongly recommend that installation be performed by a qualified diesel mechanic or a fuel injection service workshop. Incorrect installation can lead to pump failure or engine damage. The part is a direct replacement, but proper calibration and timing are critical.

Q: What kind of maintenance is required after installing this new head rotor?

A: After installation, the fuel injection pump should be tested and calibrated on a test bench to ensure correct fuel delivery and timing. For ongoing maintenance, use clean, high-quality diesel fuel and replace fuel filters regularly to prevent contaminants from damaging the new head rotor. Avoid running the fuel tank low, as this can introduce air and debris into the high-pressure system.