• Loosen the upper central nit without fully unscrewing it (1).
  • Unscrew the lower attachment (2).
  • Unscrew the upper attachment (3) and disassemble the entire shock absorber.
  • Compress the spring of suspension to remove any pressure on the central nut (1)
    Take the greatest number of whorls between the hooks of the spring compressor.
  • Remove the central nut (1) and all the other components of the upper part of the shock absorber by locating their positions (including the compressed spring).
  • Check all the disassembled parts and change the defective ones, especially the thrust anti-bumping.

In case of shock absorber with insert (cartridge), unscrew the nut of rocket (4) and remove the insert.


Start in pushing in and pulling out the piston in vertical position and make the oil circulate to prime the shock absorber.


1- For the shock absorbers with insert :

  • 1-1- Clean inside the tube and refill it with approximately 50ml of engine oil.
    NB : The oil will be running between the insert and the tube to allow a good cooling of the shock absorber
  • 1-2- Insert the cartridge of replacement in the strut and assemble the centering part if it is delivered with the shock absorber (Fig 4). Tighten the nut of the insert as recommended by the manufacturer of the vehicle.

2- Pull-up completely the stem and move upwards the spring of suspension with upper attachment, the dust cover, the trust anti-bumping and the new upper central nut.


  • The upper attachment, the seat of the upper spring and the spring of suspension must be fitted in the same order as in the beginning.
  • Never use a blunt instrument, such as grips or screwdrivers, to hold the stem for tightening the upper central nut Fig.5).
  • Do not make modifications on the shock absorbers such as new wholes on the spring seat...
  • Shock Absorbers must imperatively be replaced by pair (front or rear) in order to guarantee the vehicle's balance, its road holding and efficient braking.


After replacement of front struts MacPherson, wheel-camber angle and steering alignment should always be checked.