Product Overview

This high-precision fuel injection pump plunger is engineered for Isuzu industrial and commercial diesel engines. As a leading global supplier of OEM-quality engine components, we provide reliable parts with direct shipping to major industrial hubs across North America, Europe, Asia-Pacific, and the Middle East, ensuring timely delivery for your maintenance and repair operations.

Key Features & Benefits

• Precision Engineering: Manufactured to exact OEM tolerances for optimal fuel metering and injection timing, ensuring engine performance and fuel efficiency.
• Premium Material: Constructed from high-grade, wear-resistant alloy steel, hardened and finished to withstand high-pressure fuel cycles and prevent premature failure.
• Enhanced Durability: Advanced surface treatments minimize friction and wear, extending the service life of the plunger and the entire injection pump assembly.
• Direct Fit Replacement: Designed as a direct interchange for the original part, guaranteeing correct fitment and function without modification.
• Performance Reliability: Ensures consistent fuel delivery pressure, which is critical for maintaining engine power, reducing emissions, and preventing hard starting.

Technical Specifications

OEM Cross-Reference

This plunger is a direct replacement for the following OEM part numbers:

• Isuzu: 131151-3220
• Common Reference: A44

Always verify the part number from your original component or engine manual before ordering.

Compatibility

This fuel injection pump plunger is compatible with the following Isuzu diesel engine models:

• 4-Cylinder Engines: 4BB1, 4BD1
• 6-Cylinder Engines: 6BB1, 6BD1

These engines are commonly found in Isuzu commercial trucks, buses, and industrial machinery (generators, pumps, etc.) from the 1970s through the 1990s. Compatibility may vary by specific pump model; consult your service documentation.

Global Supply & Distribution

We specialize in the international distribution of heavy-duty engine parts. Our logistics network ensures efficient shipping to key markets worldwide:

• Major Markets Served: North America (USA, Canada, Mexico), European Union, United Kingdom, Australia, Southeast Asia, Middle East, and South America.
• Fast Delivery: We prioritize shipments to major ports and industrial centers, offering reliable air and sea freight options to minimize downtime for your business.
• Export Expertise: All documentation is prepared in full compliance with international trade regulations for smooth customs clearance.

Quality Assurance

We are committed to supplying parts that meet the highest standards of performance and reliability.

• Manufacturing Standards: Components are produced using certified processes that meet or exceed original equipment specifications for dimensional accuracy and material properties.
• Rigorous Testing: Each plunger undergoes critical dimensional checks and surface finish inspections to ensure it meets precise operational requirements.
• Warranty: Backed by a standard warranty against manufacturing defects. Please contact us for specific warranty terms applicable to your region.

FAQ

Q: How do I confirm this plunger is the correct part for my Isuzu injection pump?
A: The most reliable method is to match the part number stamped on your original plunger or pump housing. The primary number is 131151-3220, often referenced as code A44. Cross-reference this with your engine model (e.g., 4BD1) for final verification.

Q: What are the signs that my fuel injection pump plunger needs replacement?
A: Common symptoms include hard starting, uneven engine idle, loss of engine power, excessive black smoke from the exhaust, and increased fuel consumption. These indicate wear on the plunger, leading to improper fuel metering and pressure loss.

Q: Is professional installation required for this component?
A> Yes. Replacing a fuel injection pump plunger is a precision task that requires specialized tools, a clean environment, and expert knowledge of diesel fuel systems. Incorrect installation can lead to severe engine damage. We recommend installation by a qualified diesel technician.

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 .