The M51/M817/M929 5 ton 6x6 dump trucks are built on the 167” wheelbase chassis and equipped with a 5 cubic yard dump body. The body is equipped with a three way tailgate and cab protector. The body is mounted on a subframe with a dual hydraulic lift, pump, control valve and reservoir. The bed dimensions (inner) are 125”x82.5”x23”. Sideboards can be installed up to 24”.