The tension of an escalator step chain is adjusted to ensure smooth and reliable operation of the escalator and to prevent excessive wear and tear on the chain and other components. The adjustment is typically performed using a tensioning device located at one or both ends of the escalator. The tensioning device usually consists of a turnbuckle or a screw mechanism that allows the position of the idler sprocket or tension carriage to be adjusted, thereby changing the length of the chain loop and affecting its tension. The adjustment process involves first isolating the escalator and locking out its power supply for safety. Then, a qualified technician locates the tensioning device and measures the existing cha....
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