Terrain and equipment for yarding will influence trail length. ... Caterpillar D-4 and D-6, an Allis Chalmers HD-11, and a John Deere 2010 are some. ... Traction, floatation, and soil erosion problems associated with rubber tired skidders have caused us to look for track yarding machines. ... This unit with a GMC 3-53 diesel engine and Allison transmission weighs 13, 500 pounds, handles 10, 000 to 13, 000anbsp;...