11.2.3. Check of the shock-absorber
The following signs indicate malfunction of shock-absorbers:
– Additional fluctuations of a body at the movement on roughnesses of the road.
– Increase of amplitude of fluctuations of a body at the following one after another roughnesses of the road.
– Jumping of wheels at the movement on the normal road.
– An involuntary turn of the car when braking. Can be a consequence of other reasons.
– Instability on turns owing to bad coupling with a paving.
– The increased wear of tires with a cut of tops of the drawing of a protector.
– A sign of defective shock-absorbers are also existence of the roaring noise. This noise can be a consequence and other reasons, for example, an otvorachivaniye of bolts of fastening and nuts, failure of bearings of wheels and hinges of equal angular speeds. Therefore before replacement of shock-absorbers always check their state.
The shock-absorber can be checked manually. However exact check of operation of shock-absorbers is possible only with the help shock – a tester or the special test car.
Check manually
PERFORMANCE ORDER
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1. Remove the shock-absorber. |
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2. Install the shock-absorber into position, put forward and squeeze it. Throughout all course the shock-absorber has to move exactly and smoothly. |
3. At gas-filled shock-absorbers with a sufficient pressure of gas the rod itself comes back to a starting position. If the rod does not come back, it does not mean need of obligatory replacement of the shock-absorber. Its principle of action corresponds to the principle of operation of the ordinary shock-absorber until there is no considerable leak of oil. The damping operation of the shock-absorber remains also in the absence of gas pressure. However at the same time its noise characteristics worsen. |
4. At normal functioning of the shock-absorber insignificant traces of the flowed-out oil are not the basis for its replacement. The basic rule is the following here: if the oil acting from a rod epiploon is visible, but it does not spread further the lower plate of a spring, then the shock-absorber is serviceable. Insignificant leak of oil has even some advantage as at the same time the epiploon is greased that promotes increase in its service life. |
5. At considerable leak of oil the shock-absorber is subject to replacement. |
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