Method for Checking Self-Levelling Shock Absorber

Method for checking self-levelling shock absorber:




- Check that any load in the cargo area or trunk is evenly distributed. Remove any heavy items which could affect measurements.
- Lift rear of car so that the rear suspension and wheels hang free for approx. one minute. This is to ensure that the shock absorbers are not pumped up from the start of the operation.
- Lower car and allow to stand on a level surface. Measure distance A between the lowest point of the rim and the highest point on the wheel arch edge. Measure both sides. If the springs are in good condition and the self-levelling shock absorbers are operating correctly, the difference between left and right sides should be max. 15 mm (19/32") .
- Load 150 kg. (330 lbs.) into the cargo area or trunk, evenly distributed on both sides. If no weights are available, three adults can sit in the rear seat. The distance A should now be less.
- Drive the car 1-2 miles on an uneven road with weight in place.
- Immediately measure the distance A again. The load of 150 kg (330 lbs.) or three adults should be in the car. The measurement should be the same as that obtained before adding the load. Add the measurements to the form and work out the difference. The difference is OK if it is: between -20 mm and +8 mm (-25/32" +5/16") from the original unloaded measurement. The difference between right and left may be max. 15 mm (19/32") .
- If the measurements show a deviation from the values obtained, then the shock absorber must be replaced. The method for replacing a shock absorber is described in.

A test form for self-levelling shock absorbers can be found under: Self-levelling shock absorbers - Test Form, Volvo 854/855 Self-Levelling Shock Absorbers - Test Form, Volvo 854/855