Running gear
How the temperature-dependent adjuster mechanism works
The brakes heat up when operated and the components expand. The thermal clip (bimetallic) is used as a locking
element to prevent the automatic clearance adjustment being too large due to heat expansion.
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Thermal clip
Locking element
Thermal clip in “initial position”
Thermal clip in “engaged position”
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The thermal clip changes its position when heated
and engages in the locking element. The adjuster mechanism cannot turn (be adjusted) when the thermal clip is
engaged.
When the thermal clip and the brake components cool down, it will disengage from the locking element. The
return springs pull the brake shoes back into their original position. Adjustment is possible again once the brake
components have cooled down.
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