Product Overview

This high-quality Diesel Fuel Injection Pump Plunger Assembly is a critical component for maintaining the precision and performance of your Isuzu engine’s fuel system. Manufactured to strict OE specifications, this part (OEM No. A172 / 131152-4320) is designed for reliable replacement and repair. We serve a global B2B clientele, with regular shipments to major markets in North America, Europe, Southeast Asia, the Middle East, and Africa. Our stock ensures fast dispatch to industrial hubs and ports worldwide.

Key Features & Benefits

• Precision Engineering: Manufactured with high-grade alloy steel for exact fuel metering and injection timing.
• Enhanced Durability: Features a hardened and ground surface to resist wear from high-pressure fuel and contaminants, ensuring a long service life.
• Direct OE Replacement: Matches the original part dimensions and specifications (OEM A172) for a perfect, hassle-free fit.
• Improved Engine Performance: Restores fuel efficiency, reduces smoke emissions, and ensures smooth engine operation.
• Rigorous Quality Control: Every plunger is tested for leak tightness and dimensional accuracy before shipment.

Technical Specifications

OEM Cross-Reference

This plunger assembly directly replaces the following OEM and reference numbers:

• OEM Number: A172
• Alternative Reference: 131152-4320

Compatibility

This part is specifically designed for use in the following Isuzu engine families and their applications:

• Isuzu 4BC2 Engine: Commonly used in Isuzu Elf (NPR/NKR) trucks and industrial machinery.
• Isuzu 4BE1 Engine: Found in Isuzu Forward (NPR) trucks, excavators, and agricultural equipment.
• Isuzu 4D31T Engine: A turbocharged variant used in various construction and off-road vehicles.

Global Supply & Distribution

We are a dedicated supplier to the global B2B market, ensuring your operations stay on track.

• Worldwide Shipping: We partner with DHL, TNT, UPS, EMS, and FEDEX for reliable door-to-door service.
• Major Markets: Our products are exported to North America (USA, Canada, Mexico), Europe (Germany, UK, Netherlands), Southeast Asia (Thailand, Indonesia, Vietnam), the Middle East (UAE, Saudi Arabia), and South America (Chile, Peru).
• Fast Delivery: Standard processing time is 3-7 working days, ensuring quick dispatch to major ports and industrial centers.
• Flexible Ordering: Low MOQ of 24 pieces available to meet your inventory needs.

Quality Assurance

We are committed to providing parts that meet the highest industry standards.

• Manufacturing Standards: Produced in a certified facility in Shandong, China, with strict adherence to quality control processes.
• Warranty: All parts come with a 6-month warranty against manufacturing defects.
• Testing: Each plunger barrel assembly undergoes rigorous pressure and dimensional testing to ensure it meets OE performance requirements.

FAQ

Q1: What are the signs that my injection pump plunger needs replacing?
A: Common signs include hard starting, irregular engine idling, poor fuel economy, black smoke from the exhaust, and a noticeable drop in engine power. If you experience these issues, it is recommended to inspect the plunger and barrel assembly for scoring or wear.

Q2: Is this a direct replacement for my Isuzu 4BC2 engine?
A: Yes, this part (OEM A172) is a direct OE replacement for the Isuzu 4BC2, 4BE1, and 4D31T engines. It is manufactured to the exact original specifications, ensuring a perfect fit and function without the need for modifications.

Q3: How should I handle this part during installation?
A: The plunger and barrel are a matched set and must be kept together. During installation, ensure the work area is extremely clean to prevent contamination. Lubricate the plunger with clean diesel fuel or light engine oil before installation. Do not force the plunger into the barrel if it does not slide smoothly. Professional installation by a qualified diesel mechanic is highly recommended.