MDC XT16HR EAST WEST 2021, Руководство пользователя

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Understanding Tire Pressure and Load Limits
Tire inflation pressure is the level of air in the tire that provides it with load-carrying capacity and affects the overall
performance of the vehicle. The tire inflation pressure is a number that indicates the amount of air pressure– measured
in pounds per square inch (psi)–a tire requires to be properly inflated. (You will also find this number on the vehicle
information placard expressed in kilopascals (kPa), which is the metric measure used internationally.) Manufacturers
of passenger vehicles and light trucks determine this number based on the vehicle’s design load limit, that is, the
greatest amount of weight a vehicle can safely carry and the vehicle’s tire size. The proper tire pressure for your
vehicle is referred to as the “recommended cold inflation pressure.” (As you will read below, it is difficult to obtain the
recommended tire pressure if your tires are not cold.) Because tires are designed to be used on more than one type of
vehicle, tire manufacturers list the “maximum permissible inflation pressure” on the tire sidewall. This number is the
greatest amount of air pressure that should ever be put in the tire under normal driving conditions.
Checking Tire Pressure
It is important to check your vehicle’s tire pressure at least once a month for the following reasons:
• Most tires may naturally lose air over time.
• Tires can lose air suddenly if you drive over a pothole or other object or if you strike the curb when parking.
•
With radial tires, it is usually not possible to determine underinflation by visual inspection.
For convenience, purchase a tire pressure gauge to keep in your vehicle. Gauges can be purchased at tire dealerships,
auto supply stores, and other retail outlets.
The recommended tire inflation pressure that vehicle manufacturers provide reflects the proper psi when a tire is cold.
The term cold does not relate to the outside temperature. Rather, a cold tire is one that has not been driven on for at
least three hours. When you drive, your tires get warmer, causing the air pressure within them to increase. Therefore,
to get an accurate tire pressure reading, you must measure tire pressure when the tires are cold or compensate for the
extra pressure in warm tires.
Steps for Maintaining Proper Tire Pressure
• Step 1: Locate the recommended tire pressure on the vehicle’s tire information placard, certification label, or in the
owner’s manual.
• Step 2: Record the tire pressure of all tires.
• Step 3: If the tire pressure is too high in any of the tires, slowly release air by gently pressing on the tire valve stem
with the edge of your tire gauge until you get to the correct pressure.
• Step 4: If the tire pressure is too low, note the difference between the measured tire pressure and the correct tire
pressure. These “missing” pounds of pressure are what you will need to add.
• Step 5: At a service station, add the missing pounds of air pressure to each tire that is underinflated.
• Step 6: Check all the tires to make sure they have the same air pressure (except in cases in which the front and rear
tires are supposed to have different amounts of pressure).
If you have been driving your vehicle and think that a tire is underinflated, fill it to the recommended cold inflation
pressure indicated on your vehicle’s tire information placard or certification label. While your tire may still be
slightly underinflated due to the extra pounds of pressure in the warm tire, it is safer to drive with air pressure that is
slightly lower than the vehicle manufacturer’s recommended cold inflation pressure than to drive with a significantly
underinflated tire. Since this is a temporary fix, don’t forget to recheck and adjust the tire’s pressure when you can obtain
a cold reading.