Piston Pin for SPEED 19XZ-B Engines - O.S. Engine OS21956000  [OS21956000]

Purpose and correct seating of the pin

Sold under the O.S. Engine OS21956000 identifier, this piston pin is designed for use with SPEED 19XZ-B engine assemblies. Its role is to couple the piston to the connecting rod as a service replacement for engine maintenance or overhaul work.

When performing top-end service, follow the engine maker's disassembly procedure, assess piston and rod bore condition, and press the pin in using an appropriate arbor or light press. Avoid direct hammering to prevent surface damage, and confirm circlip or retainer seating once the pin is installed.

For improved longevity, focus on clean mating surfaces and correct retainer fit rather than modifying pin dimensions. Proper lubrication at assembly and careful observation during break-in will help reduce wear on the piston and rod bores.