Suspension - Assembly Of Suspension Struts And Shocks
Date: September 8, 2011
Order No.: S-B-32.25/83
Mercedes-Benz A220 2020 Page 90
Group: 32
SUBJECT: MY-All, Models All
Assembly of Suspension Struts and Shock Absorbers
The correct procedure for installing and removing or disassembling/assembling shock absorbers and struts is described below.
1. Damper tube
2. Piston rod
a. Friction marks on sealing piston
b. Without friction marks on sealing piston
Procedure
1. When releasing or tightening the nut on the piston rod (Figure 1) (2) a impact wrench/driver must not be used because the piston rod (Figure 1) (2)
will also turn and by doing so it may cause friction marks (arrow) in the damper tube (Figure 1) (1) and on the sealing piston (Figure 1) (a).
2. When releasing and tightening, the piston rod must be counter held at the upper end using a suitable tool. See WIS document:
Disassembling/assembling suspension struts AR32.25-P-1018*.
3. Turning with the impact wrench/driver creates chips, which are deposited in the sealing piston and damage the piston rod sealing. In this instance,
the damper sealing capability is no longer sustained.
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