Product Overview

This is a premium-grade Diesel Fuel Injection Pump Plunger A44, specifically designed for Isuzu industrial and automotive diesel engines. Manufactured to meet or exceed OEM specifications, this plunger barrel assembly (Model Number: element plunger 131151-3220) is a critical component for maintaining precise fuel metering and injection timing. We supply to a global network of distributors, workshops, and fleet operators across North America, Europe, Southeast Asia, and the Middle East, ensuring reliable delivery to major industrial hubs.

Key Features & Benefits

• Precision Engineering: Machined from high-grade alloy steel to ensure dimensional accuracy and a perfect seal, reducing fuel leakage and improving combustion efficiency.
• Enhanced Durability: Features a hardened surface treatment to resist wear from diesel fuel contaminants, extending service life compared to standard aftermarket parts.
• Direct OEM Replacement: Exact match for the Isuzu A44 pump system, ensuring plug-and-play installation without modifications.
• Improved Performance: Restores original engine power, reduces smoke emissions, and stabilizes idle performance in 4BB1, 4BD1, and 6BD1 engine families.

Technical Specifications

OEM Cross-Reference

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

• Isuzu OEM: 131151-3220
• Common Reference: A44 Plunger Set
• Related Numbers: 131151-3221 (if applicable for variant)

Note: Always verify your pump model (e.g., A44) and existing part number before ordering to ensure compatibility.

Compatibility

Engine Models:

• Isuzu 4BB1, 4BD1, 4BD1T, 4BD1PT, 4BD1-T
• Isuzu 6BB1, 6BD1, 6BD1T

Vehicle Applications:

• Industrial diesel engines for generators, pumps, and construction equipment.
• Medium-duty trucks and buses (e.g., Isuzu Elf, Forward series).
• Agricultural tractors and marine auxiliary engines.

Year Range: Typically 1980s-1990s production models using mechanical inline injection pumps.

Global Supply & Distribution

We offer reliable worldwide shipping with stock held in Shandong, China. Our logistics network supports:

• Fast Delivery: Express courier (DHL, FedEx) for urgent orders; sea freight for bulk MOQ.
• Major Markets: North America (Houston, Los Angeles), Europe (Rotterdam, Hamburg), Asia-Pacific (Singapore, Dubai), and Africa (Mombasa).
• Export Compliance: All shipments include proper customs documentation and commercial invoices.
• Volume Discounts: Competitive pricing for wholesale orders (MOQ 12 pcs).

Quality Assurance

• Manufacturing Standard: Produced under ISO 9001 quality management systems.
• Testing: 100% dimensional inspection and surface hardness testing before packaging.
• Warranty: 6-month warranty against manufacturing defects in material or workmanship.
• Certification: Material test reports available upon request for B2B buyers.

FAQ

Q1: Is this plunger compatible with my Isuzu 4BD1T engine pump?
Yes, the OEM number 131151-3220 is specifically designed for the A44 plunger barrel set used in 4BD1T and 4BD1PT engines. Verify your pump model (stamped on the pump housing) to confirm it uses the A44 element.

Q2: What is the installation procedure for this plunger barrel?
Installation requires removing the injection pump and disassembling the delivery valve holder. The plunger and barrel set must be installed as a matched pair. We recommend professional calibration after installation to set the correct fuel injection timing.

Q3: How can I ensure a long service life for this part?
Use clean, high-quality diesel fuel and replace fuel filters regularly. Avoid water contamination in the fuel system, as it can cause corrosion. For best results, replace the plunger and barrel set along with the delivery valve during pump overhaul.