NSK Ti-Max Z800L Manuel D'utilisation page 20

CAUTION
If another cartridge is used NSK cannot guarantee performance and the handpiece warranty would become invalid.
Always first finger tighten the head cap then secure firmly with the head cap wrench.
NSK never recommends the disassembly and repair of any NSK cartridge. There is NO EXCEPTION. In such a case a handpiece may perform
abnormally (abnormal noise or abnormal vibration). Damage, failure or accidents are outside of our guarantee.
Never use a pointed tool to attach a new O-ring as it may damage the O-ring.
NOTICE
The O-ring is common to both the head cap and the handpiece head.
19