Spring/Shock Absorber Rear, Replacement

Replacing the rear spring and shock absorber

Special tools:
999 5409 CLAMPING TOOL 999 5409 Clamping Tool
951 2834 Torque socket 21mm S/V40 951 2834 Torque Socket 21mm

Slacken off the upper section of the rear shock absorber





Remove:
- the side panel, see Removing and installing side panels in the cargo compartment, S40
- the insulation
- the protective cover
- the two nuts.

Remove the mounting for the anti-roll bar




Remove the rear mountings for the anti-roll bar on the left and right-hand sides.

Remove the rear shock absorber




Raise the car so that the wheels are unimpeded.

Remove:
- the wheel
- the mounting nut (A) for the shock absorber and the nut (B) for the trailing arm
- the screw for the trailing arm. Support the lower control arm if necessary
- the screw for the shock absorber. Remove the shock absorber.

Compress the spring




Compress the spring. Use spring clamps 999 5409 CLAMPING TOOL 999 5409 Clamping Tool.
Position the spring clamps exactly opposite each other.
The clamps must grip across as many coils as possible.
Alternately tight the spring clamps until the spring is loose.

Note! Spring clamps must always be slacked off or tightened alternately.

Disassemble the shock absorber




Remove the shock absorber nut.
Remove the ring, the upper spring cover, the rubber and the spring.
Check the parts for wear and damage.

Reinstall the coil spring
Carefully relieve the load from the spring. Position tool 999 5409 CLAMPING TOOL 999 5409 Clamping Tool on the new spring.
Position the spring clamps exactly opposite each other.
The clamps must grip across as many coils as possible.
Tighten the spring clamps alternately.

Assemble the shock absorber




Pull the piston rod as far out of the shock absorber as possible.
Install the spring and the rubber.
Position the spring cover. Ensure that it is positioned parallel with the mounting for the shock absorber (the maximum permitted deviation is 3°).
Ensure that the ends of the spring are completely inside the spring caps.
Position the ring. Install a new nut.
Tighten to 25 Nm.

Check the shock absorber




Remove the spring clamps. Check that the Silicon sealing is intact.

Caution! Damaged Silicon sealing (A) can cause leakage!

Install the upper section of the rear shock absorber




Position the shock absorber. Ensure that the end of the lower spiral is pointing towards the rear of the car.
Install the upper nuts for the shock absorber. Tighten to 50 Nm. Use new nuts.
Install the protective cap. Reinstall all removed components. See Removing and installing side panels in the cargo compartment, S40 .

Install the lower section of the rear shock absorber





Note! Check that the end of the lowest spring is pointing towards the rear of the car.

Install the screw in the lower control arm.
Press the entire mounting downwards.
Install the screw in the shock absorber.
Tighten the nuts (A and B). Use new nuts.

Install the wheel




Check that the brake disc and wheel rim mating surfaces are clean. Lubricate the hub center guide using installation paste P/N 1161397. Install the wheel. Tighten the nuts loosely.
Then tighten crosswise. Tighten to 110 Nm.
If a socket wrench is used, torque socket 951 2834 Torque socket 21mm S/V40 951 2834 Torque Socket 21mm must be used.
Post tighten the nuts by hand.

Caution! The correct torques and crosswise tightening are essential to avoid stresses in the brake disc.

Install the hub cap.

Tighten the lower control arm




Remove the support and bounce the car a few times.
Secure the anti-roll bar.

Tighten:
- the screw C. Tighten to 25 Nm
- the screw B on the trailing arm. Tighten to 90 Nm
- the screw A on the shock absorber. Tighten to 90 Nm.