- Dec 25, 2017 -
May be these several reasons, the right remedy on the line.
1. The friction may be too large, at the interface drop point of oil or the impact of the place to pack a little soft cloth on the line.
2. To observe whether the screws loose, is the words to tighten on the line, or may not be stable, the bed moved until there is no sound.
3. Do not know the reason to find maintenance personnel repair or change bed.