Txij li txhua hom pulley tsis hloov pauv tau, yog li ntawd, nws yog ib qho tseem ceeb uas yuav tsum tau siv tsuas yog hom pulley Ameslikas nruab nrog lub tsheb.Yog li ntawd, yog hais tias lub tsheb yuav tsum tau muaj zog pulleys, OWC los yog oad, pulleys ntawm tib qeb yuav tsum tau ntsia.Zoo li lwm yam kev tiv thaiv, overrun alternator pulleys yuav tsis kav mus ib txhis (cov kws kho mob yuav hloov ntau thiab ntau dua pulleys).Pulleys hnav tuaj yeem ua rau muaj kev vibration hauv txoj siv sia siv thiab feem ntau ua rau muaj kev puas tsuaj rau lub tensioner.