Umshini wamandla ochungechungeni lwe-F, i-F89 umshini wokuqina we-Dual station, okungukuthi ukuqeqesha i-Pull Down & Long Pull emshinini owodwa ofanayo..Futhi iphedi yokubambela phansi emathangeni okulula ukuyilungisa, isihlalo esinwetshiwe kanye nebha yonyawo kusiza zombili izivivinyo.Abavivinya umzimba bangakwazi ukubandakanya kalula isisindo sokwengeza ngokucindezela okulula kwe-lever ukwandisa umthwalo womsebenzi.