Hardi Commander 8500 fitted with 38.5 meter B3-maxi Auto Terrain Boom – Triplet bodies. Model 464 hydraulic drive diaphragm pump 322 l/m. Auto Terrain benefits, better boom stability, constant and uniform boom height. lower boom height, better drift control, minimise risk of boom damage, reduce down time due to breakage. less dependence on operator control, cuts operator fatigue, greater productivity, less wear and tear.