http://www.crashforensics.com/wheelandhubfailures.cfm Do not assume that all is well with your wheels and hubs, cars or big rigs. stuff happens. They do come apart , article tells why, good info...
Wheel failures and hubs
- Thread starter CourierDriver
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Good article. You can never be too careful. It is all about clamping force, that is why I always try and loosen by hand and tighten by hand with a torque wrench. Even with that you still have to use your senses. I only use a cordless impact to run them off and back on. Corrosion. and over torqued is your worst enemy. If the lug nuts are tight coming off, or back on, the stud is stretched.
http://www.conmet.com/pdfs/preset_serv_manual_revb.pdf good info here on big rig wheels and hubs
Quote:
Over-torquing is likely the most common wheel system failure due to the widespread use of impact wrenches to install wheels. Using an impact wrench to install wheels commonly causes the wheels to have 3 to 5 times the specified lug nut torque. The use of lubricants and anti-sizing compounds on the threads of the wheels studs or lug nuts can cause an even higher degree of over-torquing.
Important point here about lubing the threads which results in lower friction than expected and over-torquing.
The directions for wheel bearings is for heavy equipment, not auto wheel bearings. Timken actually requires that these bearings be pre-loosened, not pre-loaded. Timken requires 0.001" to 0.007" of axial end play in a correctly adjusted auto wheel bearing. Torque to 50 lbs-ft while rotating to set the bearing. Back off one full turn. Torque to 10 lbs-ft, back off 1/4 turn, and put in the cotter pin.
http://www.timken.com/en-us/solutions/au...ent_English.pdf
Over-torquing is likely the most common wheel system failure due to the widespread use of impact wrenches to install wheels. Using an impact wrench to install wheels commonly causes the wheels to have 3 to 5 times the specified lug nut torque. The use of lubricants and anti-sizing compounds on the threads of the wheels studs or lug nuts can cause an even higher degree of over-torquing.
Important point here about lubing the threads which results in lower friction than expected and over-torquing.
The directions for wheel bearings is for heavy equipment, not auto wheel bearings. Timken actually requires that these bearings be pre-loosened, not pre-loaded. Timken requires 0.001" to 0.007" of axial end play in a correctly adjusted auto wheel bearing. Torque to 50 lbs-ft while rotating to set the bearing. Back off one full turn. Torque to 10 lbs-ft, back off 1/4 turn, and put in the cotter pin.
http://www.timken.com/en-us/solutions/au...ent_English.pdf
Originally Posted By: Ken2
Quote:
Over-torquing is likely the most common wheel system failure due to the widespread use of impact wrenches to install wheels. Using an impact wrench to install wheels commonly causes the wheels to have 3 to 5 times the specified lug nut torque. The use of lubricants and anti-sizing compounds on the threads of the wheels studs or lug nuts can cause an even higher degree of over-torquing.
Important point here about lubing the threads which results in lower friction than expected and over-torquing.
The directions for wheel bearings is for heavy equipment, not auto wheel bearings. Timken actually requires that these bearings be pre-loosened, not pre-loaded. Timken requires 0.001" to 0.007" of axial end play in a correctly adjusted auto wheel bearing. Torque to 50 lbs-ft while rotating to set the bearing. Back off one full turn. Torque to 10 lbs-ft, back off 1/4 turn, and put in the cotter pin.
http://www.timken.com/en-us/solutions/au...ent_English.pdf
Good article, makes you wonder if the dude at Bobby Joes brake shop know this...
Quote:
Over-torquing is likely the most common wheel system failure due to the widespread use of impact wrenches to install wheels. Using an impact wrench to install wheels commonly causes the wheels to have 3 to 5 times the specified lug nut torque. The use of lubricants and anti-sizing compounds on the threads of the wheels studs or lug nuts can cause an even higher degree of over-torquing.
Important point here about lubing the threads which results in lower friction than expected and over-torquing.
The directions for wheel bearings is for heavy equipment, not auto wheel bearings. Timken actually requires that these bearings be pre-loosened, not pre-loaded. Timken requires 0.001" to 0.007" of axial end play in a correctly adjusted auto wheel bearing. Torque to 50 lbs-ft while rotating to set the bearing. Back off one full turn. Torque to 10 lbs-ft, back off 1/4 turn, and put in the cotter pin.
http://www.timken.com/en-us/solutions/au...ent_English.pdf
Good article, makes you wonder if the dude at Bobby Joes brake shop know this...
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