Malibu Boats 21 VLX, Owner'S Manual

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Check the lug-nut torque after the first fifty (50) miles of trailer use. Then
the lug-nut torque should be checked every month afterwards that the trailer
is used, and always checker prior to use if the trailer has been in storage or
not used for a period of at least two (2) weeks. Failure to do so could result
in lug-nuts loosening or dislodging from the wheel assembly. Such activity can have catastrophic results,
including loss of tow vehicle and/or trailer control, which could result in serious injury or death.
Lug nuts must also be correctly sized and specified for each trailer wheel.
Failure to properly install and maintain the lug nuts could result in the trailer
wheel coming off during operation. Such failure can result in serious injury or
death, as well as property damage.
Follow these instructions for ensuring proper installation and torque
for the lug nuts:
• Use a torque wrench. No other wrenches or similar tools are
appropriate for use, except in an emergency.
• Keep a record of readings. If a lug nut or nuts routinely loses torque,
it is symptomatic of a bigger problem that should be brought to the
attention of your authorized Malibu Trailer dealer to remedy.
• Use the following pattern to tighten lug nuts: On the first round, tighten
to 45 ft.-lbs. Tighten a second time to 70 ft.-lbs. Tighten again to 90
ft.-lbs. And on the final time, tighten to 120 ft.-lbs. Do this in a “star”
pattern; do not simply go around clockwise or counter-clockwise. The
cross effort will ensure a correct reading.
Tires
Always keep tires to the specified inflation. The tire manufacturers will indicate the proper air pressure on the
sidewall of the tire; this information is also available on the tire manufacturer’s website.
Be sure to have a spare tire on all outings. Even new tires can be damaged or lose air.
Follow the tire manufacturer’s requirements to properly maintain tires.
Failure to do so will cause tire failure while in use. This will result in loss of
control of the trailer, which can lead to serious injury or death.
When storing the trailer, periodically check the tire inflation. Loss of inflation can signal a problem and can
shorten the duration of the tire’s life. Also shield tires from UV rays, which can significantly damage rubber. If it is
possible to support the trailer frame during storage with jack stands or concrete blocks, this can help lengthen
the life of the trailer’s springs on trailers so equipped, as well as relieving pressure on the tires.
Although the tires selected for the Malibu trailer are durable, eventually they will require replacement.
DO
NOT mix radial and bias-ply tires. This could affect handling and, ultimately, safety. Be certain that the
replacement tires meet the trailer requirements and integrate with the remaining tires.
The following information provided about tires is presented courtesy of the National Highway
Transportation & Safety Administration. (Reprinted by permission.)
2020 Malibu Boats LLC • Owner’s Manual • Page 196