Product Overview

This high-quality Head Rotor Nut (7123-018E / 7123-18) is a critical component designed specifically for DPA CAV diesel fuel injection pumps. Manufactured to meet or exceed OEM specifications, this precision-engineered nut ensures a secure and reliable fitment for the head and rotor assembly. We supply this essential part globally to markets in North America, Europe, Southeast Asia, the Middle East, and Africa, supporting both aftermarket distributors and repair workshops. Our stock offers consistent quality and competitive pricing for bulk B2B orders.

Key Features & Benefits

• Precision Engineering: Manufactured from high-grade steel to exacting tolerances for a perfect fit and reliable sealing within the DPA CAV pump head and rotor assembly.
• Enhanced Durability: Designed to withstand high pressure and rotational forces, ensuring long service life and reducing the risk of pump failure.
• Direct OE Replacement: A direct replacement for OEM part number 7123-018E and 7123-18, ensuring seamless integration during pump overhaul or repair.
• Rigorous Quality Control: Each component is inspected for dimensional accuracy and material integrity to guarantee consistent performance.
• Cost-Effective Solution: Provides a high-quality alternative to expensive dealer parts, offering excellent value for volume buyers and rebuilders.

Technical Specifications

OEM Cross-Reference

This head rotor nut is a direct replacement for the following OEM and reference numbers:

• Primary OEM: 7123-018E
• Alternate Number: 7123-18
• Application: Designed for DPA and CAV distributor-type diesel fuel injection pumps.

Compatibility

This nut is specifically designed for the head and rotor assembly of DPA (Distributor Pump A) and CAV fuel injection pumps. These pumps are commonly found on a wide range of diesel engines, including agricultural tractors, industrial machinery, and some older automotive applications. It is a standard service part used during pump rebuilds and overhauls. Please verify your pump model to ensure compatibility.

Global Supply & Distribution

We are a dedicated supplier of diesel engine and fuel injection components with a strong global distribution network. We serve B2B clients including parts distributors, repair shops, and equipment dealers across:

• North America: USA, Canada, Mexico
• Europe: UK, Germany, France, Netherlands, Poland
• Asia-Pacific: Australia, New Zealand, Singapore, Japan
• Middle East & Africa: UAE, Saudi Arabia, South Africa, Nigeria
• South America: Brazil, Argentina, Chile

We offer fast and reliable shipping from our warehouse in Qingdao, China, with flexible logistics options including FOB, CIF, and DDP terms. Our supply capacity is 20,000 pieces per month, ensuring stock availability for large-scale orders.

Quality Assurance

• Manufacturing Standards: Produced under strict quality control procedures to ensure dimensional accuracy and material consistency.
• Certifications: All products are tested for hardness, thread fit, and surface finish before dispatch.
• Warranty: All parts come with a standard 1-year warranty against manufacturing defects.
• Testing: Each batch undergoes random sampling for performance verification to ensure it meets the demands of high-pressure fuel injection systems.

FAQ

Q1: What is the specific function of this head rotor nut in a DPA CAV pump?
A: This nut secures the pump’s head and rotor assembly together. It maintains the precise alignment and clamping force required for the rotor to turn smoothly within the hydraulic head. A faulty or loose nut can lead to internal leakage, pressure loss, and pump failure.

Q2: How do I confirm if this nut (7123-018E) is the correct part for my pump?
A: You can verify by checking the part number stamped on the old nut or by consulting your pump’s service manual. This nut is a standard component for most DPA and CAV pumps. If your pump model is known (e.g., a specific Lucas/CAV or Delphi pump number), please provide it to our sales team for a 100% cross-reference check.

Q3: Is any special installation procedure or torque required for this nut?
A: Yes, correct installation is critical. The nut must be tightened to the manufacturer’s specified torque setting, which is typically low (e.g., 5-10 Nm) and often requires a special socket. Over-tightening can damage the rotor. We recommend consulting a professional fuel injection service manual for the exact procedure and torque value for your specific pump model.