Specifications

Take special care to ensure
that the replacement lug nut
is the correct type. While the
threads of the lug nut may
match, it may be a size that
does not hold the wheel se-
curely against the hub, even
when fully tightened. Be cer-
tain a replacement lug nut is an
exact match for the original.
Ensuring that lug nuts on trail-
er wheels are tight and prop-
erly torqued is an important re-
sponsibility that trailer owners
and users need to be familiar
with and practice. Inadequate
and/or inappropriate lug nut torque (tightness) is a major reason that lug nuts loosen
during use. Loose lug nuts can rapidly lead to a wheel separation, with potentially
serious safety consequences.
• Check the lug-nut tightness often, especially during the rst few hundred miles
of the trailer’s use. You should always check torque at the beginning of any
long trip and every time a wheel is removed.
• You must use a torque wrench to accurately indicate the amount of torque
that you are applying to the lug nut. Four-way wrenches, ratchets, and similar
tools can be useful for short-term emergency repairs but are not appropriate
tools for accurately checking lug-nut torque.
• 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 over more than one re-torque applica-
tion because this indicates there is something potentially wrong with the lug
nuts, nut studs, wheels and/or hubs and should be corrected.
• Contact your dealer 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 your dealer. Seek prompt
professional assistance in assessing the trailer and its gear, and retain, but do
not re-use involved lugs, wheels and studs. Do not repair or service the trailer
yourself. Instead, call a trained technician.
Use the following pattern to tight-
en lug nuts. On rst torquing pass:
Bring up to 45-ft-lbs. On second
pass: Bring up to 70-ft-lbs. On
third pass: Bring up to 90-ft-lbs.
MasterCraft Trailers - Page 15