Suspension is a generic name for the connection equipment of force transmission between car body and car axle . Its function is relative motion between the axle and body and subject to vibration,

Shock absorber within the piston moves up and down ,the oil of the shock absorber cavity repeatedly fom one chamber after different pore flow into another cavity.The internal friction between the hole wall and the fluid between the friction and the oil molecules formed on the vibration damping force,vehicle vibration energy into the fluid heat emitted to the atmosphere,and then absorbed by the Shock absorber.

This working principle of shock absorber enable the car to be driven smoothly.

FAQ (oil leaking, Loud noise,Stuck ,Shaking)

oil leaking

1)     oil leaking from oil seal ( Reason: Use with cheap quality oil seal)

 2)     ( damage in strut , oil seal leaking oil due to friction)

3)        Welding spot leaking oil ( Reason :problem of manufacture craftsmanship , production equipment)

 Loud noise

 1)     Outside factor

          a. spring seat and spring not match . The space between upper and lower end of spring is to

big.

b. the top bearing bush damages.   c. loose of upper/lower arm ,ball joint, drag link, and stabilizer link.

 d. Deform of damage car

 2)   problem of shock absorber itself

        Cheap quality grease ( lubricant oil ), emulsify during the high speed running .

             the space between strut and oil seal is small

             the deform of strut and friction with powder metallurgy.

 Re: in shock absorber , the bypass valve and the bypass oil appers noise, and clear when

      Ear close to it ,this situation is ordinary and normal .

 shaking

 Outside

            The installation of Tyres location parameter is not good.

             the tyre pressure standard or not, left and right is same or not .

 c.  loose of upper/lower arm ,ball joint, drag link, and stabilizer link.

          shock absorber itself

              the inner tube of shock absorber not smooth . b.inner tube not clear

              the space of oil seal and strut is too small

 stuck

 1. Outside

 not correct assemble and verticality.

             The problem of shock absorber itself

          the blocking of valve ,inner assemble position not clear enough.

             concentricity (powder metallurgy part, piston, strut)