Isistimu ye-Safe Load Indicator (SLI) yakhelwe ukuhlinzeka ngolwazi olubalulekile oludingekayo ukuze kusetshenziswe umshini ngaphakathi kwemingcele yawo yokuklama.Isebenza kudivayisi yokuvikela ukuphepha yemishini yokukhulisa uhlobo lwe-boom.