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poor stretches of road. Moreover, they can be recognized by a
large loss of oil.
Note
Shock absorbers are maintenance-free, shock absorber oil can‐
not be topped off.
A removed shock absorber can be checked by hand as follows:
– Press shock absorber together by hand.
♦ Piston rods must move smoothly and with uniform difficulty
over the entire range.
– Release piston rods.
♦ On shock absorbers with sufficient gas pressure, piston rods
return to initial position by themselves.
Note
♦
If this is not the case, shock absorber must be replaced. As
long as there is no large loss of oil, the mode of operation cor‐
responds to that of a conventional shock absorber.
♦
The damping function is also completely available without gas
pressure, as long as there is no large loss of oil. However,
noise may increase.
3.4 Shock Absorbers, Checking on Shock
Tester
Shock absorbers can be checked while installed using the shock
tester (shock absorber testing device). The damping effect can
be evaluated based on the dial reading or print-out.
Special tools and workshop equipment required
♦ Boge Shock Tester or
♦ Sachs Shock Tester - V.A.G 1975- or
♦ Maha Shock Absorber Tester - VAS 1990-
Note
♦
Temperature +10 ... +40 ℃.
♦
Driver in vehicle.
♦
Tire pressure OK.
♦
Drive vehicle straight onto center of wheel contact plates.
♦
Front wheels in straight position.
♦
The parking brake is not engaged, the foot brake is not acti‐
vated.
Threshold
Shock absorber condition can only be judged as follows:
♦ Sufficient damping effect.
or
♦ Insufficient damping effect.
Audi Q7 2007 ➤
Suspension, Wheels, Steering - Edition 01.2014
8 Rep. Gr.00 - General, Technical Data
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