the rotation of the lift handle 14 away from the tray 12 the tethers 26 a 26 b may secure to a portion of the tray such as the lateral walls 24 a 24 b or a rear wall 28 the tethers 26 a 26 b may be embodied as chains extending from the rear wall 28 the dump handle 16 typically secures to the rear wall 28 of the tray 12 in the illustrated embodiment the dump handle 16 is embodied as a flexible cable 30 secured at its ends to the rear wall 28 laterally extending knobs 32 may be formed on the tray 12 to facilitate manipulation of the tray 12 as it lays on the ground or other support surface the knobs 32 may be part of a single bar extending along the entire rear wall 28 the shovel of a track hoe is used to push or pull on the knobs 32 to rotate the tray 12 cap plates 34 may be formed on the knobs 32 the cap plates 34 may be caught by the shovel of a track hoe to drag the tray 12 laterally the tray 12 may have reinforcing members 36 positioned along the upper edges of the lateral walls 24 a 24 b to stiffen the tray and prevent damage from impact with the track hoe or the contents of the hopper 10 a plate 38 may also secure along the exposed edge of a floor 40.