Mkpịsị aka bụ ihe e ji agbanye wiil ahụ, nke na-abụkarị n'ụdị ndụdụ. Mkpị aka elu na nke ala nwere oghere abụọ maka kingpin, a na-ejikwa akwụkwọ ndekọ knuckle ejikọta wiil ahụ. A na-ejikọ oghere abụọ nke oghere pin dị na string knockle na akụkụ dị ka aka n'akụkụ abụọ nke axle ihu site na kingpin, na-enye wiil ihu ohere ịtụgharị kingpin ahụ n'akụkụ iji duzie ụgbọala ahụ. Iji belata iyi, a na-etinye ihe mkpuchi ọla nchara n'ime oghere pin knuckle, a na-etinyekwa mmanụ na-eme ka bushing ahụ dị mma site na iji mmanụ a gbanyere n'ime nozzle nke dị n'elu knuckle. Iji mee ka string ahụ dị nro, a na-ahazi bearings n'etiti oghere ala nke string knockle na akụkụ aka nke axle ihu. A na-enyekwa gasket nhazi n'etiti ntị na akụkụ aka nke string knockle iji dozie oghere dị n'etiti ha.
