The reason you are not supposed to lubricate lug nuts is not because that may allow them to come off. As mentioned above a bolt depends upon stretching to maintain enough force to keep it from loosening. Different type of lubricant will greatly vary the amount of torque that needs to be applied to a fastener to attain the correct stretch. The only way manufacturer can be assured the the proper amount of force is applied is to is to have a uniform method of tightening the fastener. Specifying clean, dry threads is one way to accomplish this.
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Today's Featured Article - Box Plow Blues - by Tom Schwarz. One of the first implements most tractor owners obtain is the box plow. For very little money, this piece of equipment promises to plow and flatten any hill or vale on your ranch road or farm. At least that's what I thought! As simple as a box plow appears, it can be rather challenging to make work correctly. In our sandy soils of Florida, traction is king. You can never have wide enough tires or heavy enough weights to get all the traction you want … unless you own a monster tractor. U
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