Diesel Plunger Barrel A766 131153-8720

The Diesel Plunger Barrel A766 131153-8720 is a precision-machined component designed for use in Bosch VE-type rotary diesel injection pumps. It features a nominal outer diameter of 12.7 mm and a bore diameter of 7.2 mm, with a length of 92.0 mm. The component is manufactured from high-carbon chromium steel, hardened and tempered to ensure resistance to fatigue and wear under high-cycle operation.

This barrel is commonly used in light-duty diesel engines found in passenger vehicles and small commercial vehicles. The material grade is typically equivalent to AISI 52100 or DIN 1.3505, with a surface hardness of 60-64 HRC. The bore is ground to a surface roughness of Ra 0.08 micron, which is standard for rotary pump applications. Typical dimensional tolerances for the outer diameter are ±0.01 mm, and the barrel must maintain concentricity within 2 microns to prevent leakage and maintain injection pressure.

Buyers often source this part for repairs on vehicles with Bosch VE pumps, including models from Mercedes-Benz, Volkswagen, and Renault. It is supplied in single units or bulk lots, with packaging in sealed anti-corrosion bags. The supplier does not specify minimum order quantities or lead times. Buyers should confirm compatibility with their pump’s serial number, as A766 variants may differ in internal geometry despite similar external dimensions.

Chen Chen Diesel Parts Plant operates from Fuzhou, Fujian Province, China, and specializes in manufacturing diesel fuel injection components including plungers, barrels, nozzles, and delivery valves. The supplier is listed as an imported tier with harbor trust status, indicating basic compliance with export documentation standards. There is no public information on years in business, workforce size, or revenue. The supplier does not list any certifications such as ISO or IATF, nor does it claim direct OEM supply relationships.

The supplier's website description emphasizes quality control and global exports but provides no verifiable details on testing protocols, inspection equipment, or traceability systems. Response rate and average response time are recorded as zero, suggesting limited buyer communication capability. Buyers should treat this as a manufacturer of replacement parts rather than an original equipment supplier, and validate part compatibility through physical measurement or pump model cross-reference before large orders.