Escalator handrails cause

Escalator handrails fever for several reasons:
1, handrail belt tension is too tight or too loose and guide
2, guiding device interface is not smooth, there are entire guides are not on a level.
3, handrail drive wheel grinding polishing force is too tight or too loose. There is the drive wheel is not grinding polishing the handrails handrail Centre side of the situation.
4, handrail inlet switches installed with ground Sassafras.
These questions deal with the fever was not so much. Handrails run ground Sassafras, a little heat is out of the question.