1.Store them with "No Load" 0(ZERO) on the setting.
2.Pre-Torque by starting at a low setting 10-15 ft/lbs and work your way up to
80 ft/lbs on the Lug Bolts to PRE-Lube and KINDA RESET the wrench after long
dis-use.[Think of it as EXCERSIZING the Torque Wrench,after dis-use]
3.I always use an old style Beam Torque Wrench to VERIFY the HF units are working properly,BEFORE actually setting the Torque on anything.

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'84 300SD sold
124.128