Ekubeni zonke iintlobo ze-pulley azitshintshi, ngoko ke, kubalulekile ukusebenzisa kuphela uhlobo lwe-pulley ekuqaleni luxhotyiswe ngesithuthi.Ngoko ke, ukuba isithuthi sifuna iipuli eziqinileyo, i-OWC okanye i-oad, iipuli zodidi olufanayo kufuneka zifakwe.Njengawo nawaphi na amanye amacandelo, iipulleys ezidlulayo aziyi kuhlala ngonaphakade (amagcisa aya kuthatha indawo yeepulleys ezininzi nangaphezulu).Iipuli ezigugileyo zinokubangela ukungcangcazela kwindlela yokuqhuba ibhanti kwaye kaninzi zenza umonakalo kwi-tensioner.