Ls600 pump — trailer safety guidelines – Multiquip Mayco Concrete Pump LS600 User Manual
Page 58
PAGE 58 — MAYCO LS600 PUMP — OPERATION AND PARTS MANUAL — REV. #4 (9/15/11)
LS600 PUMP — TRAILER SAFETY GUIDELINES
U.S. DOT Tire Identification Number: This begins with
the letters “DOT” and indicates that the tire meets all federal
standards. The next two numbers or letters are the plant
code where it was manufactured, and the last four numbers
represent the week and year the tire was built. For example,
the numbers 3197 means the 31st week of 1997. The other
numbers are marketing codes used at the manufacturer’s
discretion. This information is used to contact consumers
if a tire defect requires a recall.
Tire Ply Composition and Materials Used: The number
of plies indicates the number of layers of rubber-coated
fabric in the tire. In general, the greater the number of plies,
the more weight a tire can support. Tire manufacturers also
must indicate the materials in the tire, which include steel,
nylon, polyester, and others.
Maximum Load Rating: This number indicates the
maximum load in kilograms and pounds that can be carried
by the tire.
Maximum Permissible Inflation Pressure: This number
is the greatest amount of air pressure that should ever be
put in the tire under normal driving conditions.
Uniform Tire Quality Grading Standards (UTQGS)
Treadwear Number:
This number indicates the tire’s
wear rate. The higher the treadwear number is, the longer it
should take for the tread to wear down. For example, a tire
graded 400 should last twice as long as a tire graded 200.
Traction Letter:
This letter indicates a tire’s ability to
stop on wet pavement. A higher graded tire should allow
you to stop your car on wet roads in a shorter distance
than a tire with a lower grade. Traction is graded from highest
to lowest as “AA”,”A”, “B”, and “C”.
Temperature Letter: This letter indicates a tire’s resistance
to heat. The temperature grade is for a tire that is inflated
properly and not overloaded. Excessive speed,
underinflation or excessive loading, either separately or in
combination, can cause heat build-up and possible tire
failure. From highest to lowest, a tire’s resistance to heat is
graded as “A”, “B”, or “C”.
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.
P:
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 support. You may find this information in your
owner’s manual. 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 markings; hence, they have some mud and snow
capability.
Speed Rating: The speed rating denotes the speed at
which a tire is designed to be driven for extended periods
of time. The ratings range from 99 miles per hour (mph) to
186 mph. These ratings are listed in Table 7. Note: You may
not find this information on all tires because it is not required
by law.
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