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Hebei Hankai what is the function of oil seal

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    To lower the door, turn the adjustment screw counterclockwise. To raise the door, turn the adjustment screw clockwise
    adjusting
    adjusting pocket door rollers. Make small adjustments, testing the door after each turn to ensure it slides smoothly. It may take a few tries to get the door to the desired height, so be patient and continue to make small adjustments as needed.