2. Remove the caliper, move aside and secure. Check the condition of the disk on both sides. When traces of deep mining are found (depth over 0.38 mm) remove the disc and grind in a car service (see photo).
3. Check the runout of the disc along its edge using a dial indicator (see photo). If the beat on the indicator exceeds the norm, then remove the disc and grind. On 4WD models, screw the 2 wheel nuts back in place to secure the disc to the hub. The flat surfaces of the nuts must face the disc. If the beat on the indicator exceeds the norm (0.15 mm), then remove the disc and sand it.
Attention! The disk is generally recommended to be periodically removed and polished, regardless of the indicator readings. At least this can be done by hand with fine sandpaper (see photo), to reduce roughness.
4. After grinding, the thickness of the disc should not be less than the maximum allowable, which is cast on the disc (see photo).
5. On rear wheel drive models (4x2) the brake disc is integral with the front wheel hub. Hub removal and installation covered in Wheel Bearing Service Procedure (see Chapter 1). On all all-wheel drive models (4x4) (except for monophonic (K-30) models) the disc can be removed from the hub after removing the wheel and brake caliper. On one-ton K-30 model and all-wheel drive models (4x4), the disc is pressed onto the hub and removed as an assembly with the hub and bearing (see Chapter 10). If you need to replace the disc, then take the hub assembly to a car service to remove the old disc and press on a new one.