2.6.1. Check of wheels

Fig. 2.4. Scheme of shift of wheels

Periodically check air pressure in tires and you bring it to the level recommended by manufacturer of the car (see tab. 2.2). The increased or lowered pressure results in premature wear of tires, deterioration in controllability and stability of the car. In order that tires wore out evenly, through each 10 000 km of a run rearrange wheels according to the scheme in fig. 2.4. Also through each 10 000 km of a run balance wheels and regulate the angles of installation of forward wheels. For this purpose address in a specialized workshop.
It will be required to you: manometer, pump, caliper.

Prevention
Operation of tires with a worn-out protector can lead to accident.

Recommendation
It is convenient to use the foot pump with the built-in manometer.

1. Turn off a cap from a zolotnik (or remove it, if a cap plastic).
2. Check air pressure in the tire. For this purpose connect the manometer to a zolotnik and press it.
3. If pressure is less than demanded, connect a hose tip to a zolotnik and pump up air, controlling pressure on the manometer on the pump.
4. If pressure is more than demanded, press a special ledge of the manometer on a zolotnik and let out the air from the tire. Measure the manometer pressure. Repeating these operations, bring pressure to norm.

Note
So the protective cap with a key for a zolotnik inhaling looks.

Prevention
In order to avoid pollution of zolotniks do not use the car without protective caps. If caps were lost, surely establish new.

5. If you noticed that air pressure in tires constantly falls, try to wrap a zolotnik more tightly by means of a cap with a key.
6. To check tightness of a zolotnik, wet its opening. If there were vials of the coming-out air, replace a zolotnik.
7. Measure by a caliper the residual depth of a protector. If depth of a protector of 1,6 mm or is less, replace the tire.

Note
If near at hand there is no caliper, then depth of a protector can be checked visually on indicators of wear of the tire in the form of the continuous cross strips appearing on a protector at its maximum wear.
The locations of indicators are marked on a tire sidewall with the letters "TWI".

8. Check an inhaling of bolts of fastening of wheels and if necessary improve them (the inhaling moment see in the appendix 1).