Originally Posted by canyonduck
We are in the process of switching out our tow vehicle for our 19' international from a Nissan Xterra (great off road, not so great for towing) to a 2015 F150. I had to adjust our equalizer WD hitch yesterday as the receiver on the truck is about 6" lower than on the Xterra. I was able to get the shank bolts out with the help of an impact wrench, but do not have a torque wrench capable of the manufacturer recommended 320 foot-lbs. So, I used the impact wrench to tighten the shank bolts, which is likely more than the recommended torque setting (although I cannot confirm this). Would you consider this acceptable or should I invest in a 3/4" torque wrench or find a place to make this adjustment for me? I want to make sure we are being safe on the road. Thanks.
The proper torque is VERY important. "If the tension on the bolt is greater than the working load, it will never fail. If the tension is less than the preload, it will fail as a 'fatigue break."
If your torque wrench doesn't have the capacity to go as far as specified, then coat the threads and the nut face with C-5 Colloidal copper or similar and reduce your torque by 40%, to achieve the same bolt tension. (Only 10% of your torque is actually used to tighten the fastener, the rest is to overcome friction.)
[Source: Premier Fastener Corp. former agent.]