AL-KO compression spring, for coupling head safety indicator
AL-KO compression spring for the safety indicator of the coupling head. The spring is part of the wear and connection indicator, which shows green when correctly coupled and red in the event of wear or an incorrect connection.
If the indicator no longer gives a clear reading even though the coupling is correctly seated, a fatigued or broken spring may be the cause. After replacement, check the indicator with the trailer coupled.
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