Product Overview

This high-quality Fuel Injection Pump Head Rotor (Part Numbers: 146400-2220 / 146400-1420) is specifically engineered for the Mitsubishi 4D55 diesel engine. As a critical component of the fuel delivery system, this head and rotor assembly ensures precise fuel metering and injection timing, directly impacting engine performance, fuel efficiency, and emissions. Sourced from a leading manufacturer in Shandong, China, this part is designed to meet or exceed OEM specifications. We provide global shipping solutions, serving major markets across North America, Europe, Southeast Asia, the Middle East, and Africa, ensuring reliable supply for workshops, distributors, and fleet maintenance operations worldwide.

Key Features & Benefits

• Precision Engineering: Manufactured from high-speed steel for exceptional durability and resistance to wear, ensuring a long service life even under high-pressure injection conditions.
• 100% Professional Testing: Every unit undergoes rigorous testing for dimensional accuracy, hydraulic performance, and pressure integrity to guarantee reliable operation.
• OEM Quality & Fitment: Designed as a direct replacement for the original Mitsubishi parts (146400-2220 / 146400-1420), ensuring a perfect fit and seamless integration with the existing fuel injection pump.
• Enhanced Engine Performance: Restores optimal fuel atomization and injection timing, leading to smoother idling, improved throttle response, reduced smoke emissions, and better fuel economy.
• Reliable Supply Chain: With a monthly supply capacity of 5,000 pieces, we can accommodate bulk orders and maintain consistent stock levels for ongoing business needs.

Technical Specifications

OEM Cross-Reference

This head and rotor assembly is a direct replacement for the following OEM part numbers. Please verify your existing part number before ordering.

• Primary OE Number: 146400-2220
• Alternate OE Number: 146400-1420

Note: Always confirm compatibility by cross-referencing the original part number from your injection pump.

Compatibility

• Engine Model: Mitsubishi 4D55 (4-cylinder diesel engine)
• Vehicle Applications: This engine was commonly used in various Mitsubishi vehicles including the L200, Pajero, and other light trucks and SUVs from the 1980s and 1990s. It is also used in some industrial and marine applications.
• Pump Type: Suitable for rotary distributor-type fuel injection pumps commonly found on the 4D55 engine.

Global Supply & Distribution

We are a dedicated supplier of diesel engine components with a robust global distribution network. Our logistics capabilities ensure fast and reliable delivery to clients worldwide.

• Worldwide Shipping: We ship from any major Chinese port, including Qingdao, Shanghai, and Shenzhen.
• Major Markets Served: Our products are exported extensively to North America (USA, Canada, Mexico), Europe (UK, Germany, France, Spain), Asia-Pacific (Australia, New Zealand, Japan, South Korea), the Middle East (UAE, Saudi Arabia), Africa (Nigeria, South Africa), and South America (Brazil, Argentina).
• Fast Delivery: Standard delivery time is 3-7 days after order confirmation, with expedited shipping options available for urgent requirements.
• Bulk Orders: With a monthly supply capacity of 5,000 pieces, we can efficiently handle large wholesale orders for distributors and repair centers.

Quality Assurance

• Manufacturing Standards: Produced in an ISO-compliant facility using precision machining processes and high-grade raw materials.
• Testing Procedures: Each head and rotor assembly is 100% professionally tested for hydraulic pressure, dimensional tolerance, and surface finish to ensure flawless operation.
• Warranty: We offer a comprehensive 1-year warranty against manufacturing defects, providing peace of mind for your purchase.

FAQ

Q1: How do I confirm that this head and rotor (146400-2220) fits my injection pump?

A: The most reliable method is to remove the old head and rotor from your pump and compare the part number stamped on it. This part is a direct replacement for numbers 146400-2220 and 146400-1420. It is specifically designed for the Mitsubishi 4D55 engine’s rotary injection pump. If you have a different engine or pump model, please contact us with your original part number for verification.

Q2: What are the key steps for installing a new head and rotor assembly?

A: Installation is a precision task that should be performed by a qualified diesel technician. Key steps include: 1) Thoroughly cleaning the pump housing and all components. 2) Lubricating the new head and rotor with clean diesel fuel or assembly oil. 3) Carefully aligning the drive pins and timing marks during installation. 4) Torquing the retaining screws to the manufacturer’s specifications. 5) After installation, the injection pump must be re-timed and calibrated on a test bench to ensure correct fuel delivery and engine timing. Improper installation can lead to severe engine damage.

Q3: What maintenance is recommended to maximize the lifespan of the new head and rotor?

A: The longevity of the head and rotor is heavily dependent on fuel quality and filtration. We strongly recommend: 1) Always using clean, high-quality diesel fuel. 2) Replacing the fuel filter at the intervals specified in your vehicle’s manual. 3) Regularly draining any water from the fuel separator. 4) Ensuring the fuel injection pump is filled with the correct grade of lubricating oil (if applicable to your pump type). Contaminated fuel is the primary cause of premature wear in these precision components.

Our advantages

1.An authorized wholesaler of Isuzu genuine parts, Hino genuine parts, Mitsubishi genuine parts and Mahle parts.

2. We are not only supply genuine parts, but also high quality OEM parts, which are made in China or made in Japan.

3. More than 10 years of experience in machinery parts, professional supply of diesel engine parts.

4. Fast delivery, the fastest can be shipped in one day ,more than 500,000 of different types parts in stock.

5. Scientific ERP system, easy and fast to locate the parts that customer needs.

6. Professional technician checks the parts before delivery, to make sure the parts are correct, usable and defect-free.

Exhibition

Packing&Shipping

1.  Our shipment is by air/sea/express (DHL/FEDEX/TNT/UPS/EMS).

2.  Once we get confirmation of payment, we will ship products in 2 days.

3.  Our packaging is standard export wooden box or others as your requirement.

4. We’ll check and test the products before shipping , and givethe pictures to our customers to confirm.

FAQ

Q1. What is your company major products?

A: Our main products are Liner kit, Piston, Rings, Liner, Gasket kit, Bearing, Injection pump, Nozzle, Water pump, Oil pump,Crankshaft, Turbocharger,Filter, etc.

Q2.What is the MOQ?

A: Normally we can supply any quantity if we have in stock.

Q3. What is your payment term ?

A: We accept Western Union, T/T, Paypal.

Q4. What is the packing ?

A: Carton or wooden case , If you want to put your logo on the packing , We will do it after get your authorization letter.

Q5. When can you deliver products after payment ?

A: By Express ,usually might take 3-4 days ;By Air , Usually take 7-9 days ; By Sea ,usually take 1-2 months .

Q6. What can you do to complete order perfectly ?

A: In the beginning , We will communicate with clients in details to understand what they need .

Before packing , We will check the products and send photos to clients .After confirmation ,

We will packing products well to avoid damage . Once we get tracking number ,

We will send it to customer and keep contact in with clients .