Struts, Testing on Shock Tester

Struts, testing on shock tester

Struts can be checked while installed using the shock tester (strut testing device). The damping effect can be evaluated based on the dial reading or print-out.

Special tools, testers and auxiliary items required

^ Boge shock tester or
^ Sachs shock tester V.A.G 1975 or
^ Maha shock absorber tester VAS 1990

Note:
^ Temperature +10 to +40 degrees C.
^ Driver in vehicle.
^ Tire pressure OK.
^ Drive vehicle straight onto center of wheel contact plates.
^ Front wheels in straight position.
^ Parking not engaged, foot brake not activated.

Threshold

Strut condition can only be judged as follows:

^ Sufficient damping effect

or

^ Insufficient damping effect

Note:
^ Intermediate values for reduced damping performance cannot be read out.
^ A prognosis on service life is not permitted.
^ Measured values that come about from involvement of suspension travel end stops are incorrect.

The following values apply only to the test stands named above. If the specified values are exceeded, the strut action has weakened enough that a replacement is recommended.





Example:

Threshold = 70

^ a = greater than 70: Insufficient damping effect
^ a = less than 70: Sufficient damping effect

Strut combination installed in vehicle is indicated by corresponding PR number on vehicle data plate.

Clarification of weight Production Relevant numbers (PR No.)

Threshold "a" in mm

Note:
^ If the readout value is greater than the limit value "a" (table value): Damping effect insufficient.
^ If the readout value is less than the limit value "a" (table value): Damping effect sufficient.

Vehicles up to VIN 400 000





Vehicles from VIN 400 001