hitachi — HYDRAULIC COMPONENT

GENERAL / Component Specifications CYLINDER Boom Arm Rod Diameter .........................................115 mm (4.5”) 130 mm (5.1”) Cylinder Bore..........................................170 mm (6.7”) 190 mm (7.5”) Stroke .....................................................1590 mm (5’3”) 1940 mm (6’4”) Fully Retracted Length ...........................2260 mm (7’5”) 2710 mm (8’11”) Plate Thickness......................................30 µ m (1.18 µ in) 30 µ m (1.18 µ in) Weight ....................................................420 kg (930 lb) 656 kg (1450 lb) Bucket Counterweight Removal (Optional) Rod Diameter .........................................120 mm (4.7”) 65mm (2.6”) Cylinder Bore..........................................170 mm (6.7”) 130 mm (5.1”) Stroke .....................................................1325 mm (4’4”) 360 mm (1’2”) Fully Retracted Length ...........................2041 mm (6’8”) 777 mm (2’7”) Plate Thickness......................................30 µ m (1.18 µ in) 30 µ m (1.18 µ in) Weight ....................................................401 kg (885 lb) 82 kg (181 lb) FRONT ATTACHMENT PILOT VALVE Model..............................................................HVP06A-040-101 TRAVEL PILOT VALVE Model..............................................................HVP05S-040-101 AUXILIARY/ COUNTER WEIGHT REMOVAL PILOT VALVE (Optional) Model..............................................................HVP05M-040-101 SOLENOID VALVE UNIT Function..........................................................

SG : Power Digging Control SI : Travel Motor Swash Angle Control SF : Boom Flow Rate Control Valve Control SC : Boom Mode Selector Control PILOT PRESSURE SIGNAL CONTROL VALVE Function.......................................................... Shock Reducing (Boom Raise) Arm Flow Rate Control Valve Control Swing Parking Brake Release Flow Combiner Valve Control PILOT SHUT-OFF SOLENOID VALVE Type................................................................ON/OFF Solenoid Valve T1-3-7