The recommended frequency: each 12 000 km of a run or 6 months.
For safety during the replacing or shift of wheels carry out the following rules:
– install the car on the firm horizontal nonslipping platform;
– tighten the lever of the parking brake, switch off ignition;
– turn on the first or reverse gear, or put the lever of the automatic transmission in position "P";
– enclose an emphasis under wheels to prevent rolling the car.
You are not under the car, standing on a jack at all (if necessary install it on basic racks).
You make shift of wheels according to the schedule of maintenance or in case of uneven wear of tires.
Fig. 2.18. Scheme of shift of wheels: LF — a forward left wheel; RF — a forward right wheel; LR — a back left wheel; RR — a back right wheel; SPARE — a spare wheel (type of the tire same, as well as other wheels)
After shift of wheels with the tires having the directed drawing of a protector they have to rotate in the same party, as before shift