Product Overview

This high-quality diesel fuel injection pump head rotor, part numbers 146400-4520 and 9 461 620 956, is a critical component for Isuzu VE pump systems. Designed for precision and durability, this rotor head ensures optimal fuel metering and injection timing for your diesel engine. We ship globally to major markets including North America, Europe, Southeast Asia, and the Middle East, with fast delivery to industrial centers and major ports.

Key Features & Benefits

• Precision Engineering: Manufactured to exact OEM specifications for seamless fitment and reliable performance.
• Enhanced Durability: Constructed from high-grade steel to withstand high-pressure injection cycles and resist wear.
• Optimal Fuel Efficiency: Precision-machined surfaces ensure accurate fuel delivery, improving combustion and reducing consumption.
• Rigorous Testing: Each unit undergoes strict quality control to meet international standards for pressure and flow consistency.
• Cost-Effective Solution: A direct replacement for worn OE parts, offering long service life and reduced downtime.

Technical Specifications

OEM Cross-Reference

This head rotor replaces the following OEM and reference numbers:

• Primary OEM: 146400-4520
• Alternate Number: 9 461 620 956
• System: Designed for Bosch VE-type distribution pumps

Compatibility

This component is compatible with diesel engines utilizing the Bosch VE-type rotary injection pump. Common applications include:

• Isuzu Engine Models: 4JB1, 4JG2, 4BD1, 6BD1, and other VE pump-equipped Isuzu engines
• Vehicle Applications: Isuzu trucks, buses, construction machinery, and agricultural equipment
• Note: Verify pump model and engine code before purchase. This is a precision internal pump part.

Global Supply & Distribution

We offer worldwide shipping to support your operations, wherever you are based.

• Shipping Partners: DHL, TNT, UPS, EMS, FEDEX – fast and reliable delivery.
• Major Markets: North America (USA, Canada, Mexico), Europe (Germany, UK, Netherlands, France), Asia-Pacific (Japan, Australia, South Korea), Middle East (UAE, Saudi Arabia), Africa, and South America.
• Delivery Time: 3-7 days for in-stock items.
• Export Experience: We specialize in international B2B trade, ensuring proper documentation and packaging for global shipping.

Quality Assurance

We are committed to providing parts that meet or exceed OE performance.

• Manufacturing Standards: Produced in ISO-certified facilities with strict process control.
• Testing: Each head rotor is tested for dimensional accuracy, surface finish, and pressure integrity.
• Warranty: 6-month warranty against manufacturing defects.
• Support: 24-hour customer service to assist with technical inquiries and order support.

FAQ

1. What is the function of the head rotor in a VE injection pump?

The head rotor is the central rotating component of the VE distributor pump. It meters the fuel and distributes it to the correct injector at the precise moment. A worn or damaged head rotor can cause poor engine performance, hard starting, and uneven running.

2. How can I confirm this part fits my Isuzu engine?

Please check your injection pump’s model number and the existing part number. This head rotor (146400-4520 / 9 461 620 956) is a standard replacement for many Bosch VE pumps used on Isuzu 4JB1, 4JG2, and similar engines. If you are unsure, contact our support team with your pump model and engine code for verification.

3. What maintenance is recommended after installing a new head rotor?

Installation of internal pump components should be performed by a qualified diesel technician. After installation, the injection pump must be properly timed and calibrated on a test bench to ensure correct fuel delivery and engine synchronization. We recommend replacing the pump’s seals and checking fuel quality to maximize the life of the new part.