Abstract
Introduce KOMATSU's newest hydraulic systems and components for medium-sized bulldozer, which includes electronic controlled HST (Hydro Static Transmission) and hydraulically drive fan system. Electronic controlled HST consists of tandem piston pumps and two inside-shoe type final drives. Inside-shoe type final drive consists of bent axis type piston motor and 2 stage planetary reduction gear. Hydraulically drive fan system consists of variable piston pump common with work equipment pump and in-fan type fixed motor. This system is also electronically controlled. By using these hydraulic systems and components, layout flexibility and vehicle design flexibility are drastically improved, therefore this bulldozer can get unrivaled blade visibility and productivity at the same time.
