This is a genuine OEM-approved replacement part designed for use with Hitachi nailers. It is the part of the nail gun that drives the nail into the material that is being used. These assemblies do have a tendency to bend or break if not used correctly or if you are driving nails into extra hard material. Includes a metal piston, driver, and the O-ring.
To help extend the life of a pneumatic tool use the specified oil in it daily 4-5 Drops will do every time you use it.
To replace this part you would need a hex key/allen wrench.
• First you want to remove the exhaust cover
• Remove the old piston assembly and install a new one
• Secure the cover and test the unit
