Hydraulic
Hydraulic System
Three variable displacement piston pumps are driven by heavy-duty pump drive. Two of the variable displacement pumps are used in the main hook hoist circuit, boom hoist circuit, auxiliary hook hoist circuit, third hoist circuit, and each propel circuit. The other is used in the swing circuit. Control: Full-flow hydraulic control system for infinitely variable pressure to front and rear drums, boom hoist brakes, and clutches. Controls respond instantly to the touch, delivering smooth function operation. Cooling: Oil-to-air heat exchanger (plate-fin type). Filtration: Full-flow and bypass type with replaceable element. Electrical system: All wiring corded for easy servicing, individual fused branch circuits. Max. relief valve pressure: Load hoist, boom hoist, and propel system: 31.9 MPa (325 kgf/cm²); Swing system: 27.5 MPa (280 kgf/cm²); Control system: 7.0 MPa (71 kgf/cm²). Reservoir capacity: 440 liters.