Zexel A814 Diesel Injection Pump Plunger 131150-2620 for Isuzu 6HH1 NPR

Product Details

Product Overview

This genuine Zexel diesel injection pump plunger, model number 131150-2620 with OEM reference A814, is a critical component for fuel delivery systems in Isuzu diesel engines. Designed for the 6HH1 engine block, this plunger is commonly used in the Isuzu NPR series of medium-duty trucks. As an original equipment quality part from Zexel—a leading Japanese manufacturer of fuel injection systems—this plunger ensures precise fuel metering and reliable engine performance.

The A814 plunger is a direct replacement for worn or failed units, restoring injection pressure and spray pattern to factory specifications. This part is essential for maintaining combustion efficiency, reducing emissions, and preventing common issues such as hard starting, misfiring, and power loss in diesel engines.

Please verify your engine model (6HH1) and existing part number before purchase to ensure correct fitment. This plunger is a new, genuine component sourced from Japan.

Key Features & Benefits

• Genuine Zexel Quality: Manufactured by Zexel, a trusted OEM supplier for Isuzu and other major diesel engine manufacturers, ensuring exact tolerances and long service life.
• Precision Engineering: Machined from high-grade metal alloy to strict specifications, providing consistent fuel delivery and optimal injection pressure.
• Direct OEM Replacement: Part number A814 (131150-2620) matches original equipment specifications for Isuzu 6HH1 engines, simplifying installation and eliminating guesswork.
• Enhanced Durability: Designed to withstand the high-pressure environment of diesel injection systems, offering resistance to wear and thermal stress for extended operational life.
• Improved Engine Performance: Restores proper fuel atomization, leading to smoother idle, better throttle response, and reduced fuel consumption.
• Easy Identification: Laser-etched part numbers ensure authenticity and simplify cross-referencing during maintenance or rebuilds.
• Reliable Supply Chain: In-stock inventory with fast shipping from our global distribution network, minimizing downtime for your fleet or workshop.

Technical Specifications

OEM Cross-Reference

This plunger is directly cross-referenced to the following OEM and equivalent part numbers for easy identification:

• Zexel: A814, 131150-2620
• Isuzu: 131150-2620, A814
• Compatible with: 131150-2620 (Original Zexel Number)

Note: Always confirm your existing part number against this list before ordering. If your part number is not listed, please contact our support team with your engine serial number for verification.

Compatibility

This Zexel A814 plunger is commonly used for the following applications:

• Engine: Isuzu 6HH1
• Vehicle Models: Isuzu NPR (various configurations including NPR HD, NPR Gas/Diesel variants)
• Year Range: Commonly compatible with vehicles produced between 1976 and 1993 (verify your specific engine model)

Important Fitment Note: While this plunger is designed for the 6HH1 engine, variations exist within injection pumps. Please confirm that your existing injection pump uses the A814 plunger. Cross-reference with your current part number to ensure compatibility.

Global Supply & Distribution

We maintain a robust global supply chain capable of shipping this genuine Zexel plunger worldwide. Our distribution network covers all major markets, ensuring fast and reliable delivery to your doorstep.

• North America: Expedited shipping to USA, Canada, and Mexico via major carriers (UPS, FedEx, DHL).
• Europe: Fast delivery to EU countries, UK, and Eastern Europe from our regional hubs.
• Asia-Pacific: Direct shipments to Japan, South Korea, Australia, New Zealand, and Southeast Asian markets.
• Middle East & Africa: Regular services to UAE, Saudi Arabia, South Africa, and key industrial centers.
• Latin America: Reliable shipping to Brazil, Argentina, Chile, and other major economies.

We offer flexible shipping options including air freight and sea freight. All shipments are fully insured and tracked. Our team handles all customs documentation and international trade compliance to ensure smooth delivery.

Quality Assurance

Every Zexel A814 plunger we supply undergoes rigorous quality control to meet the highest industry standards.

• Manufacturing Standards: Produced in ISO 9001 and IATF 16949 certified facilities in Japan.
• Testing: Each plunger is tested for dimensional accuracy, surface hardness, and hydraulic performance to ensure it meets OEM specifications.
• Warranty: Backed by a 6-month warranty against manufacturing defects. In the unlikely event of a failure, we provide video technical support for troubleshooting.
• Authenticity Guarantee: All parts are sourced directly from authorized Zexel distributors. We guarantee genuine, first-quality parts—no aftermarket imitations.

FAQ

Q1: How can I confirm this A814 plunger fits my Isuzu NPR injection pump?
A: Locate the existing part number on your current plunger or injection pump. If it reads “A814” or “131150-2620”, this is a direct replacement. You can also check your engine serial number (6HH1) and injection pump model. If you are unsure, please send us a photo of your old part or pump label, and our technical team will verify compatibility within 24 hours.

Q2: What are the common symptoms of a worn injection pump plunger?
A: A failing plunger can cause hard starting, irregular idle, black smoke from the exhaust, reduced engine power, and increased fuel consumption. If you notice these issues, especially on an Isuzu 6HH1 engine, replacing the plunger (along with other wear parts like the delivery valve and element) can restore proper function. We recommend inspecting the entire pump head assembly during replacement.

Q3: Is professional installation required for this plunger?
A: Yes. Installation of an injection pump plunger involves precise measurement of plunger stroke, timing adjustments, and high-pressure fuel system work. We strongly recommend installation by a certified diesel mechanic or injection pump specialist. Improper installation can lead to engine damage or performance issues. After installation, the injection pump should be re-calibrated on a test bench to ensure correct fuel delivery settings.