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Lug nuts are prone to loosen right after a wheel is mounted to a hub. When driving on a new or
remounted wheel, che
ck the lug nut tightness often during the first few hundred miles of the trailer’s use,
especially after the first 10, 25 and 50 miles of driving, before each tow, and at least twice per year
thereafter.
Tighten the lug nuts to the proper torque for the axle size on your trailer to prevent wheels from coming
loose. Use a torque wrench to tighten the fasteners. The only way to be certain you have checked the
torque or torqued the lug nuts to the proper torque is with a torque wrench. Four-way wrenches, ratchets,
and similar tools can be useful for short-term emergency repairs, but are not appropriate tools for
adequately checking lug nut torque. You must use a torque wrench to adequately indicate the torque that
you are applying to the lug nut. If you do not have a torque wrench, tighten the fasteners with a lug
wrench as much as you can, then have a service garage or dealer tighten the lug nuts to the proper
torque. Over-tightening will result in breaking the studs or permanently deforming the mounting stud
holes in the wheels.
Figure 7-1 Lug nut sequence of tightening
Keep a record of the date and approximate mileage when you check the lug nut torque. Note any lug nut
that has lost torque. Investigate the reason(s) if the lug nut torque is not maintained after more than one
re-torque application, because this indicates there is something wrong with the lug nuts, nut studs, wheels
and/or hubs and should be corrected.
Contact your dealer or vehicle manufacturer immediately if you experience any persistent lug nut
loosening or any other lug, wheel or axle problems.
In the event of a wheel separation incident, notify the vehicle manufacturer and dealer. Seek prompt
professional assistance in assessing the trailer and its gear, and reta
in, but don’t re-use involved lugs,
wheels and studs. Don’t repair or service the trailer yourself. Call a trained technician.
Lug nuts are prone to loosen after initial installation, which can lead to serious injury or death.
Check lug nuts for tightness on a new trailer or when wheel(s) have been remounted after the
first 10, 25 and 50 miles of driving.
WARNING
Metal creep between the wheel rim and lug nuts will cause rim to loosen and could result in a
wheel coming off, leading to death or serious injury.
Tighten lug nuts before each tow.
WARNING
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