Disassembling and Assembling Rear Spring Strut
Disassembling and assembling rear spring strut
Tools
Disassembling and assembling rear spring strut
Disassembly and assembly instructions
Disassembly
- Tension the coil spring with the spring clamp until the piston rod is relieved.
- To undo the connection between piston rod and spring strut mount: counter at the piston rod with a 7-mm open-ended wrench.
Caution: Never use an impact bolter to loosen or tighten the fastening nut.
- Remove all parts from the piston rod.
Information
^ When installing new parts, observe the allocation according to the Spare Parts Catalogue.
Preliminary work and notes on assembly
- Replace nut for fastening the piston rod on the spring strut mount.
- It is recommended to replace the coil springs only in pairs.
Information
^ If the coil springs are exchanged, it might be necessary to use a different spring plate than before.
The following spring plates (compensation parts) are available:
Allocation of the spring plate according to the coil spring tolerance group.
1 green line = 4.0 mm thick compensation part.
1 white line = 0.5 mm thick compensation part.
- Press intermediate part (compensation part No. 4) into the spring plate (No. 5) in the correct position (not twisted) and complete with the mount (No. 3). In the correct position means: None of the 7 cutouts (A) must be free on the spring plate (No. 5).
- Fit protective bellows on additional spring.
- Observe the correct allocation (running gear version) when installing new springs and/or dampers.
Distinguishing feature of coil springs and dampers
A - Identification of the running gear version (spring constant/spring length) by two different colored lines (for example, 1 x brown and 1 x yellow). Refer to the Parts Catalogue for the allocation.
B - Identification of the coil spring tolerance group (load group) for determination of the compensation part (spring plate) thickness.
C - Colour dot (color label) to differentiate the damper identifier.
1 white line = 0.5 mm thick compensation part.
1 green line = 4.0 mm thick compensation part.
Brown dot = Standard running gear, RoW/USA
Green dot = Sport-type running gear, RoW
Grey dot = Sport-type running gear, USA
- Tension coil spring with spring clamp.
- Clamp eye of vibration damper in the vise (use jaw liners).
Assembly
- Place pre-tensioned coil spring on the vibration damper.
- Slide the protective tube/additional spring assembly on the piston rod.
- Slide the washer No. 7 and stop plate No. 6 (No. 6 in correct position) as far as they will go onto the piston rod.
- Place the spring strut mount (assembly of spring strut mount intermediate part / spring plate) onto the piston rod so that the end of the coil spring lies against the stop of the spring plate.
^ Place stop plate in the correct position on the spring strut mount. Screw new fastening nut onto the piston rod until approx. 1 to 2 threads are visible above the fastening nut.
- Position the spring strut mount for installation (correctly position spring strut mount with respect to the damper). The mounts for the right and left sides are identical parts.
- The mount is positioned correctly if one of the 3 fastening pins is aligned with the holder on the damper tube.
Tighten the fastening nut to 58 Nm (43 ftlb.) once the mount has been correctly positioned and the coil spring lies properly against the stop. When tightening the fastening nut, hold at the piston rod using a 7-mm open-ended wrench.
Caution: Never use an impact bolter to tighten the fastening nut.
