Product Overview

This premium quality rotor head (also known as a head rotor) is a critical component for the Isuzu 4JB1-TC diesel engine injection pump. Designed to exact OEM specifications, this part ensures precise fuel metering and reliable engine performance. We are a leading global supplier based in Shandong, China, serving major markets including North America, Europe, Southeast Asia, the Middle East, and Africa. With a supply capacity of 1000 pieces per month, we ensure fast and reliable delivery for B2B clients worldwide.

Key Features & Benefits

• Precision Engineering: Manufactured to standard OEM dimensions for a perfect fit and optimal fuel pressure regulation.
• Enhanced Durability: Built with high-grade materials to withstand the high pressures within the injection pump, ensuring a long service life.
• Improved Engine Performance: Ensures consistent fuel delivery to injectors, leading to smoother idling, better fuel economy, and reduced emissions.
• Rigorous Quality Control: Each unit is tested for dimensional accuracy and hydraulic performance before shipment to guarantee “Excellent” quality.
• Direct Replacement: A true OEM replacement part with no modifications required for installation on compatible pumps.

Technical Specifications

OEM Cross-Reference

This rotor head is a direct replacement for the following original equipment manufacturer (OEM) part numbers:

• Isuzu OEM: 146402-4720
• Alternative OEM: 9461624616

Note: Please verify your existing part number against the list above to ensure compatibility.

Compatibility

• Engine Models: Isuzu 4JB1-TC (Turbocharged), 4JB1 (Naturally Aspirated)
• Vehicle Applications: Commonly used in Isuzu Elf (N-Series) trucks, light-duty commercial vehicles, forklifts, and agricultural machinery powered by the 4JB1 series engine.

Global Supply & Distribution

We are equipped to serve a global B2B clientele with efficiency and speed.

• Shipping Partners: DHL, UPS, FedEx, EMS, and TNT for express delivery.
• Major Markets: North America (USA, Canada, Mexico), Europe (Germany, UK, France, Netherlands), Asia-Pacific (Japan, Korea, Australia, Indonesia), Middle East (UAE, Saudi Arabia), and Africa (Nigeria, Kenya, South Africa).
• Lead Times: Standard delivery is 3-7 working days after payment confirmation.
• Flexible MOQ: Low minimum order quantity of just 4 pieces to support both small workshops and large distributors.

Quality Assurance

• Manufacturing Standards: Produced in ISO-compliant facilities in Shandong, China.
• Testing: Every rotor head undergoes strict hydraulic pressure testing and dimensional inspection to ensure flawless operation.
• Warranty: We provide a 6-month warranty against manufacturing defects.
• Packaging: Available in neutral, original, or custom packaging (plastic tube + carton + pallet) to ensure safe transit.

FAQ

Q1: How do I know if this rotor head fits my Isuzu 4JB1-TC pump?

A: Please verify the part number on your existing rotor head. If it reads 146402-4720 or 9461624616, this part is a direct fit. It is specifically designed for the 4/11L injection pump configuration common on the 4JB1-TC engine.

Q2: What are the common signs of a failing rotor head in an injection pump?

A: Symptoms include hard starting, irregular engine idle, loss of power under load, excessive black smoke, and fuel leaks from the pump housing. If you experience these issues, replacing the rotor head is a critical step before rebuilding the entire pump.

Q3: Is professional installation required for this part?

A: Yes. The rotor head is a high-precision component inside the fuel injection pump. Installation requires specialized tools and knowledge of pump timing and calibration. We strongly recommend that a qualified diesel injection technician perform the replacement to ensure proper engine function and safety.