JLG Triple-L Operator Manual - Manual (Page 64)

SECTION 4 - SERVICE AND MAINTENANCE
4-24 – Triple-L-Trailer – 3121224
Tire Tread
The tire tread provides the gripping action and traction
that prevent your vehicle from slipping or sliding, espe-
cially when the road is wet or icy. In general, tires are not
safe and should be replaced when the tread is worn down
to 1/16 of an inch. Tires have built-in treadwear indicators
that let you know when it is time to replace your tires.
These indicators are raised sections spaced intermittently
in the bottom of the tread grooves. When they appear
"even" with the outside of the tread, it is time to replace
your tires. Another method for checking tread depth is to
place a penny in the tread with Lincoln's head upside
down and facing you. If you can see the top of Lincoln's
head, you are ready for new tires.
Tire Balance And Wheel Alignment
To avoid vibration or shaking of the vehicle when a tire
rotates, the tire must be properly balanced. This balance
is achieved by positioning weights on the wheel to coun-
terbalance heavy spots on the wheel-and-tire assembly. A
wheel alignment adjusts the angles of the wheels so that
they are positioned correctly relative to the vehicle's
frame. This adjustment maximizes the life of your tires.
These adjustments require special equipment and should
be performed by a qualified technician.
Tire Repair
The proper repair of a punctured tire requires a plug for
the hole and a patch for the area inside the tire that sur-
rounds the puncture hole. Punctures through the tread
can be repaired if they are not too large, but punctures to
the sidewall should not be repaired. Tires must be
removed from the rim to be properly inspected before
being plugged and patched.
Tire Fundamentals
Federal law requires tire manufacturers to place standard-
ized information on the sidewall of all tires. This informa-
t i o n i d e n t i f i e s a n d d e s c r i b e s t h e f u n d a m e n t a l
characteristics of the tire and also provides a tire identifi-
cation number for safety standard certification and in case
of a recall.
Information On Passenger Tires
P
The "P" indicates the tire is for passenger vehicles.
Next Number
This three-digit number gives the width in millimeters of
the tire from sidewall edge to sidewall edge. In general,
the larger the number, the wider the tire.
Next Number
This two-digit number, known as the aspect ratio, gives
the tire's ratio of height to width. Numbers of 70 or lower
indicate a short sidewall for improved steering response
and better overall handling on dry pavement.
R
The "R" stands for radial. Radial ply construction of tires
has been the industry standard for the past 20 years.
Next Number
This two-digit number is the wheel or rim diameter in
inches. If you change your wheel size, you will have to
purchase new tires to match the new wheel diameter.
Next Number
This two- or three-digit number is the tire's load index. It is
a measurement of how much weight each tire can sup-
port. You may find this information in your owner's man-
ual. If not, contact a local tire dealer. Note: You may not
find this information on all tires because it is not required
by law.
M+S
The "M+S" or "M/S" indicates that the tire has some mud
and snow capability. Most radial tires have these mark-
ings; hence, they have some mud and snow capability.
Treadwear, Traction
and Temperature Grades