This document specifies the terms and definitions, structural types, basic requirements, technical requirements and test methods, inspection rules, markings, packaging, transportation and storage, and quality commitments of the valve gapless rocker arm assembly (hereinafter referred to as the rocker arm assembly). . This document applies to steel and cast iron valve gapless rocker arm assemblies (including valve rocker arms, roller assemblies, inserts, and hydraulic tappets) for reciprocating internal combustion engines with a cylinder diameter less than or equal to 200 mm.
T/ZZB 3107-2023 history
2023T/ZZB 3107-2023 Combustion engine-Rocker arm assembly without valve clearance