Import Diesel Plunger Barrel Assembly A79 131151-6320 — Buy in Bulk from Supplier in China

The Diesel Plunger Barrel Assembly A79 131151-6320 is a replacement component for diesel fuel injection systems used in light commercial vehicles and marine engines. It is designed to interface with Stanadyne DB2 and similar rotary pump models, with a plunger diameter of 8.0 mm and a barrel length of 13.5 mm. The assembly is machined to a tight dimensional tolerance of ±0.01 mm, ensuring compatibility with OEM pump housings without modification.

The plunger and barrel are manufactured from hardened alloy steel with a typical composition of 1.1% carbon and 1.5% chromium, conforming to DIN 1.3505 or equivalent standards. Surface hardness is achieved through induction hardening, reaching 62-66 HRC, which exceeds the minimum industry requirement for high-cycle durability. The internal bore is honed to a surface roughness of Ra 0.08 micrometers, a value commonly seen in premium aftermarket replacements but not always present in budget-grade parts.

This assembly is primarily sourced by engine rebuilders in Latin America, the Middle East, and Eastern Europe, where diesel vehicle fleets require cost-effective alternatives to OEM parts. Orders are typically placed in quantities of 20 to 100 units, packaged in sealed plastic sleeves inside corrugated cartons. Lead times vary from 20 to 30 days depending on order volume. Trade terms are usually FOB Fuzhou, with payment by T/T or L/C at sight. Buyers should confirm the pump model compatibility, as A79 series parts are not interchangeable with other series without verification.

Chen Chen Diesel Parts Plant operates from Fuzhou, Fujian Province, and specializes in manufacturing fuel injection components including plunger barrel assemblies, delivery valves, and nozzles. The supplier is listed as an imported tier with harbor trust status, indicating verified export activity and documented shipping history. There is no public information about production volume, workforce size, or years in operation. The listing confirms no certifications such as ISO or IATF are held, and response rates are not tracked on the platform.

The company does not claim OEM authorization or direct partnerships with engine manufacturers. Its product range includes over 50 part numbers for diesel injection systems, all sourced from its own machining facility. Quality control is described as rigorous but not externally audited. Buyers should request physical samples and test reports before placing bulk orders, as no third-party inspection records are provided in the listing.