- prolonged rocking of the body when driving on uneven road surfaces;
- increasing body sway when driving on uneven road surfaces;
- uneven and unstable wheel movement (bouncing) when driving in a certain range of speeds, including cornering;
- deviation from the given trajectory of the vehicle during braking;
- unstable cornering and skidding of the car;
- increased tire wear, characterized by the erasing of their pattern;
- the appearance of clicks and extraneous noise when the car is moving. Clicks and light bumps can also be caused by other suspension problems, in particular, loose threaded connections, failure of the hub bearings or wear of the constant velocity joints of the drive shafts.
To check the technical condition of the shock absorber, remove it from the car.
Inspect the body and shock absorber rod. There should be no mechanical damage on the body, and traces of corrosion on the stem. Set the shock absorber to a vertical position and check its operation by moving the shock absorber rod through the entire stroke and up and down a length of 50–100 mm. In all cases, the shock absorber rod should move smoothly, with perceptible resistance. If the stem moves jerkily or is damaged, the shock absorber must be replaced.
The rod of a gas-filled shock absorber can spontaneously extend out of the shock absorber. The absence of spontaneous extension of the rod from the shock absorber does not indicate a malfunction. In this case, the operating mode of the gas-filled shock absorber corresponds to the operating mode of the hydraulic shock absorber. The shock absorber performs its functions even in the absence of excess gas pressure, but additional noise may appear when the piston moves.
Check for shock absorber fluid leaks. A small oil leakage is allowed while maintaining the normal performance of the shock absorber. It is normal if the fluid leak from the damper only extends to the lower spring seat. With a slight leakage of fluid from the shock absorber, the sealing ring of the shock absorber rod is lubricated, which increases its service life.
In the presence of severe fluid leaks, the shock absorber must be replaced.
Pic. 12–22. Rear steering knuckle: 1 – a rotary fist; 2 - clamping sleeve; 3 - ABS sensor; 4 - rubber bushing; 5 - bearing; 6 - mudguard; 7 - bolt, 10 Nm; 8 - wheel hub
When installing it is necessary to use a new bushing 2 (pic. 12–22), having previously applied grease G 000 650 to the hole of the steering knuckle.
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