Grapple ndi cholumikizira choyenera chogwirira ntchito zosiyanasiyana.Bokosi la chitsulo chowotcherera la 3 tines ndi 2 tini zitsulo zowotcherera bokosi zimasonkhanitsidwa kuti zigwirizane.Kutengera ndi momwe mumagwirira ntchito, titha kulimbitsa chigonjetso pamizere yake ndi zipolopolo zake zamkati mwamagawo awiri.Poyerekeza ndi zovuta zamakina, kulimbana ndi ma hydraulic kumakupatsani njira yosinthika yogwirira ntchito.Pali ma silinda awiri a hydraulic omwe amayikidwa mu bokosi la ma 3, omwe amatha kuwongolera matupi atatu otseguka kapena kutseka kuti agwire zidazo.