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
1. Remove the shock-absorber.
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.