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Hitachi Excavators ZAXIS225US

Hitachi Excavators ZAXIS225US
Specifications :
Model Isuzu AI-4HK1X
Type 4-cycle water-cooled, direct injection
Aspiration Turbocharged, intercooled
No. of cylinders 4
Rated power ISO 9249, net 122 kW (164 HP) at 2 000 min-1 (rpm)
Rated power EEC 80/1269, net 122 kW (164 HP) at 2 000 min-1 (rpm)
Rated power SAE J1349, net 122 kW (164 HP) at 2 000 min-1 (rpm)
Maximum torque 655 Nm (67 kgf m) at 1 500 min-1 (rpm)
Piston displacement 5.193 L
Bore and stroke 115 mm x 125 mm
Batteries 2 x 12 V / 88 Ah
Work mode selector Digging mode / Attachment mode
Engine speed sensing system  
Main pumps 2 variable displacement axial piston pumps
Main pumps Maximum oil flow 2 x 212 L/min
Pilot pump 1 gear pump
Pilot pump Maximum oil flow 30 L/min
Hydraulic Motors
Travel 2 variable displacement axial piston motors
Swing 1 axial piston motor
Relief Valve Settings
Implement circuit 34.3 MPa (350 kgf/cm2)
Swing circuit 34.3 MPa (350 kgf/cm2)
Travel circuit 34.3 MPa (350 kgf/cm2)
Pilot circuit 3.9 MPa (40 kgf/cm2)
Power boost 36.3 MPa (370 kgf/cm2)
Hydraulic Cylinders
High-strength piston rods and tubes. Cylinder cushion mechanisms provided in boom and arm cylinders to absorb shock at stroke ends.
Hydraulic Filters
Hydraulic circuits use high-quality hydraulic filters. A suction filter is incorporated in the suction line, and full-flow filters in the return line and swing / travel motor drain lines.
Pilot controls. Hitachi's original shockless valve.
Implement levers 2
Travel levers with pedals 2
Revolving Frame
Welded sturdy box construction, using heavy-gauge steel plates for ruggedness. D-section frame for resistance to deformation.
Swing Device
Axial piston motor with planetary reduction gear is bathed in oil. Swing circle is single-row, shear-type ball bearing with induction-hardened internal gear. Internal gear and pinion gear are immersed in lubricant.
Swing parking brake is spring-set/hydraulic-released disc type.
Swing speed 13.3 min-1 (rpm)
Operator's Cab
Independent spacious cab, 1 005 mm wide by 1 675 mm high, conforming to ISO* Standards. Reinforced glass windows on 4 sides for visibility. Front windows (upper and lower) can be opened. Reclining seat with armrests; adjustable with or without control levers.
* International Standardization Organization
Tractor-type undercarriage. Welded track frame using selected materials.
Side frame welded to track frame. Lubricated track rollers, idlers, and sprockets with floating seals.
Track shoes with triple grousers made of induction-hardened rolled alloy.
Heat-treated connecting pins with dirt seals. Hydraulic (grease) track adjusters with shock-absorbing recoil springs.
Numbers of Rollers and Shoes on Each Side
Upper rollers 2
Lower rollers 7 : ZX225US-3
8 : ZX225USLC-3
Track shoes 46 : ZX225US-3
49 : ZX225USLC-3
Track guard 1
Travel Device
Each track driven by 2-speed axial piston motor through planetary reduction gear for counterrotation of the tracks. Sprockets are replaceable.
Parking brake is spring-set/hydraulic-released disc type. Travel shockless relief valve built in travel motor absorbs shocks when stopping travel.
Automatic transmission system: High-Low.
Travel speeds High : 0 to 5.5 km/h
Low : 0 to 3.5 km/h
Maximum traction force 203 kN (20 700 kgf)
Gradeability 35 degree (70 %) continuousv
Equipped with 5.68 m boom, 2.91 m arm and 0.80 m3 bucket (SAE, PCSA heaped).
Equipped with 5.68 m boom, 2.91 m arm and 0.80 m3 bucket (SAE, PCSA heaped).
Weight of the basic machines [including counterweight and triple grouser shoes, excluding front-end attachment, fuel, hydraulic oil, engine oil and coolant etc.] are:
ZX225US-3 19 000 kg with 600 mm shoes
ZX225USLC-3 19 400 kg with 600 mm shoes
Fuel tank 320.0 liters
Engine coolant 26.0 liters
Engine oil 23.0 liters
Swing device 6.9 liters
Travel device (each side) 6.8 liters
Hydraulic system 230.0 liters
Hydraulic oil tank 123.0 liters
Boom and arms are of welded, box-section design. 5.68 m boom, and 2.42 m, 2.91m arms are available.
Bucket is of welded steel structure. Side clearance adjust mechanism provided on the bucket joint bracket.
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