Heavy duty design includes oversized pins and bushings, clam with a ribbed bottom for increased strength, larger hydraulic cylinders for increased clamping pressure, dozer portion has boxed frame construction for greater strength. Design allows for location of pivot pin in straight line with back side of clam to assure clam closes in proper radius for near 100% clean up. Exterior mounted clam prevents dirt or other foreign material from building up behind cylinder causing possible damage.