Titan Leaf Pro, Operation & Maintenance Manual

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Inspection, Service, and Maintenance
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Loosen the spindle nut just until you are able to turn it (the spindle nut) by hand. Do not turn the
hub while the spindle nut is loose.
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Put a new cotter pin through the spindle nut and axle.
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Check the adjustments. Both the hub and the spindle nut should be able to move freely (the
spindle nut motion will be limited by the cotter pin).
6.2.9.2. Lug Nuts (Bolts)
Being sure wheel mounting nuts (lug nuts) on trailer wheels are tight and properly torqued is an important
responsibility that trailer owners and users need to be familiar with and practice. Inadequate and/or
inappropriate wheel nut torque (tightness) is a major reason that lug nuts loosen in service. Loose lug nuts
can rapidly lead to a wheel separation with potentially serious safety consequences.
Lug nuts are prone to loosen right after a wheel is mounted to a hub. When driving on a new or remounted
wheel, check 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.
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ARNING
Lug nuts are prone to loosen after initial installation, which can lead to death or serious injury.
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.
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ARNING
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.
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 6-1 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.