Driver Unit 884643

This genuine replacement piston driver assembly is sourced from original equipment manufacturer and it is 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 and the driver. Please note the o-ring is sold separately. 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 only need a tool to remove o-rings. • First you want to remove the cap • Remove driver, and take out piston ring and o-ring • Secure the o-ring and piston ring on new driver • Install new driver • Secure the cap and test the unit