Preventive Maintenance for a Torque Wrench
Torque wrenches are precision instruments and should be treated as such. Preventative maintenance will give early detection of worn or out of tolerance tools and prevent premature failures.
It should be regularly inspected for wear or worn items such as the handle or ratchet and repaired as needed.
One of the more important things the user should remember with a click style wrench is to wind the wrench back to the minimum torque setting after use, as this will help maintain the calibration of the tool by reducing the pressure on the spring when it is being stored.
Standards recommend a calibration interval of 5000 cycles or 12 months whichever comes first.