With immediate effect, the hydraulic lines (control lines) in the area of the wheel head have to be checked in the above-mentioned vehicles for damage, during each workshop visit.
W55.90-1182-09
Damage-sensitive areas |
1 | Scuff protection | 2 | Connector | A | Damage |
The hydraulic lines (control lines) are wrapped in a relatively stiff chafe protection (1). This wrapping should act as protection against any chafe marks.
Current investigations have shown that the chafe protection (1) creates an increase in stiffness that exerts a negative influence on the bending radius.
This exerts a significant load on the area between the bolted connector (2) and the end of the chafe protection (1).
If any visible damage (A) is found on the affected hydraulic lines (control lines) they must be replaced.
The new hydraulic lines are made without chafe protection (1). This means that the hydraulic lines remain movable over the entire length and therefore they can absorb or compensate for the vehicle movement much better.
See the following repair instructions for removal/installation of the hydraulic lines on the wheel head: