Product Overview

This high-quality DPA diesel injection pump head rotor, model 7180-819U with rotor number 820U and specification 4/9R, is a precision-engineered replacement component designed for diesel engines used in excavators and heavy machinery. Manufactured in Shandong, China, this head rotor is a critical part of the fuel injection system, ensuring optimal fuel metering and delivery for reliable engine performance. We offer worldwide shipping and serve major markets including North America, Europe, Asia-Pacific, the Middle East, and South America, catering to B2B clients in the construction, mining, and agricultural sectors.

Key Features & Benefits

• Precision Engineering: Manufactured to standard dimensions for a direct, seamless replacement of the original DPA pump head rotor, ensuring accurate fuel delivery and consistent engine operation.
• Enhanced Durability: Constructed from high-grade materials to withstand the high pressures and demanding conditions of diesel injection systems, providing long service life.
• Reliable Performance: Designed for repair or replacement of worn-out components, this rotor restores pump efficiency, reduces fuel consumption, and minimizes engine downtime.
• Cost-Effective Solution: Offers a competitive price point without compromising on quality, providing excellent value for fleet maintenance and aftermarket parts procurement.
• Global Compatibility: Suitable for a wide range of diesel engine applications in excavators and other heavy equipment, backed by professional service and support.

Technical Specifications

OEM Cross-Reference

This head rotor is designed as a direct replacement for the following OEM part numbers:

• Primary Part Number: 7180-819U
• Rotor Number: 820U
• Specification Code: 4/9R

Note: This part is a standard aftermarket replacement. For specific fitment verification, please cross-reference your original part number with the information provided.

Compatibility

This DPA head rotor is compatible with a wide range of diesel engines, particularly those found in:

• Engine Applications: Diesel engines in cars and light commercial vehicles.
• Vehicle Types: Primarily designed for diesel engine cars but also suitable for other diesel-powered equipment using DPA-type fuel injection pumps.
• Note: Ensure your injection pump model matches the 4/9R specification and 820U rotor number for correct fitment.

Global Supply & Distribution

We are a dedicated supplier of diesel engine parts with a strong global distribution network, ensuring fast and reliable delivery to our B2B partners.

• Worldwide Shipping: We ship to all major ports and industrial centers across the globe, including North America, Europe, Asia-Pacific, the Middle East, Africa, and South America.
• Fast Delivery: Efficient logistics ensure quick processing and shipping times from our location in Shandong, China.
• B2B Expertise: We have extensive experience in international trade and comply with all export regulations, offering flexible packaging options (Neutral or OEM).
• Professional Service: Our team provides dedicated support to assist with order inquiries, technical questions, and after-sales service.

Quality Assurance

• Manufacturing Standards: Produced in a quality-controlled facility in Shandong, China, following industry standards for diesel injection components.
• Warranty: Each unit comes with a 4-month warranty against manufacturing defects, ensuring reliability and peace of mind.
• Testing: All head rotors undergo rigorous inspection and testing to guarantee dimensional accuracy and performance before shipment.

FAQ

Q1: What is the function of the DPA head rotor (7180-819U / 820U) in a diesel injection pump?
A: The head rotor is a core component of the DPA rotary injection pump. It rotates to distribute high-pressure fuel to each injector line in the correct firing order. This part (7180-819U with rotor number 820U) meters and pressurizes the fuel, directly impacting engine combustion, power output, and efficiency. A worn rotor can cause misfiring, hard starting, or loss of power.

Q2: How can I verify if this 4/9R head rotor is the correct replacement for my pump?
A: To confirm fitment, you must check your existing injection pump’s identification plate or the part number on the current head rotor. The key identifiers are the main part number (7180-819U), the rotor number (820U), and the specification (4/9R). If these three numbers match your original component, it is the correct direct replacement. If you are unsure, contact our professional service team with your pump model and original part number for verification.

Q3: What are the common signs that a DPA head rotor needs replacement?
A: Common symptoms of a failing head rotor include engine surging at idle, black smoke from incomplete combustion, poor fuel economy, hard starting, and a noticeable drop in engine power. If your diesel engine exhibits these issues, inspecting and potentially replacing the head rotor (along with other wear parts like the drive shaft and pumping elements) is a standard repair procedure for DPA pumps.