# Overhaul and preventive maintenance

An overhaul should be done once per year or after a maximum of 100.000 tightening. More frequent preventive maintenance and overhaul are needed if the tool is used in heavy-duty operations. If the tool is not working correctly take it out of service immediately for inspection.

At overhaul and maintenance:

- clean all parts thoroughly

- replace worn or defective parts

- lubricate the threads and o-rings with grease before assembly

- make sure that the threaded connections on the tool are tightened in accordance with the specifications on the exploded views