Downloadable brochures and spec sheets for current and non-current models are here.
Interview with Designers of the Mid-Size Excavators
The "Made by HITACHI" global quality standard, produced at the "Mother Design Factory" in Japan.
ZAXIS70
ENGINE
| Model | Isuzu AU-4LE2X |
| Type | 4-cycle water-cooled, direct injection |
| Aspiration | Turbocharged, intercooled |
| No. of cylinders | 4 |
| Rated power EEC 80/1269 (without Fan) | 40.5 kW (54.3 HP) at 2 000 min-1 (rpm) |
| Rated power SAE J1349 (without Fan) | 40.5 kW (54.3 HP) at 2 000 min-1 (rpm) |
| Rated power ISO 9249, net | 39.4 kW (52.8 HP) at 2 000 min-1 (rpm) |
| Rated power EEC 80/1269, net | 39.4 kW (52.8 HP) at 2 000 min-1 (rpm) |
| Rated power SAE J1349, net | 39.4 kW (52.8 HP) at 2 000 min-1 (rpm) |
| Maximum torque | 215 Nm (21.9 kgf m) at 1 500 min-1 (rpm) |
| Piston displacement | 2.179 L |
| Bore and stroke | 85 mm x 96 mm |
| Batteries | 2 x 12 V / 52 Ah |
HYDRAULIC SYSTEM
Swing-independent 3-pump hydraulic system
OHS (Optimum Hydraulic System) assures fully independent and combined operations
Automatic 2-speed motor increases traction force and travel speed
Engin speed sensing system
| Main pumps | 3 variable displacement axial piston pumps |
| Main pumps Maximum oil flow | 2 x 72.6 L/min 1 x 61.6 L/min |
| Pilot pump | 1 gear pump |
| Pilot pump Maximum oil flow | 22.0 L/min |
Hydraulic Motors
| Travel | 2 variable displacement axial piston motors |
| Swing | 1 axial piston motor |
Relief Valve Settings
| Implement circuit | 26.0 MPa (265 kgf/cm2) |
| Swing circuit | 23.0 MPa (235 kgf/cm2) |
| Travel circuit | 31.4 MPa (320 kgf/cm2) |
| Pilot circuit | 3.9 MPa (40 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.
Dimensions
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.
CONTROLS
Pilot controls. Hitachi's original shockless valve.
| Implement levers | 2 |
| Travel levers with pedals | 2 |
UPPERSTRUCTURE
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 | 10.5 min-1 (rpm) |
| Swing torque | 14.3 kN m (1 460 kgf m) |
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
UNDERCARRIAGE
Tracks
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 | 1 |
| Lower rollers | 5 |
| Track shoes | 38: ZX70-3 40: ZX70LC-3 / ZX80LCK-3 |
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 5.3 km/h Low : 0 to 3.4 km/h |
| Maximum traction force | 58.9 kN (6 010 kgf) |
| Gradeability | 70 % (35 degree) continuous |
SERVICE REFILL CAPACITIES
| Fuel tank | 135 L |
| Engine coolant | 10.3 L |
| Engine oil | 12.1 L |
| Travel device (each side) | 1.2 L |
| Hydraulic system | 100 L |
| Hydraulic oil tank | 60 L |
WEIGHTS AND GROUND PRESSURE
ZX70-3 :
Equipped with 3.72 m boom, 1.62 m arm and 0.28 m3 (SAE, PCSA heaped) bucket.
ZX70-3 with Blade (Optional) :
Equipped with 3.72 m boom, 1.62 m arm and 0.28 m3 (SAE, PCSA heaped) bucket.
ZX70LC-3 :
Equipped with 3.72 m boom, 1.62 m arm, 0.33 m3 (SAE, PCSA heaped) bucket.
ZX70LC-3 with Blade (Optional) :
Equipped with 3.72 m boom, 1.62 m arm, 0.33 m3 (SAE, PCSA heaped) bucket.
ZX80LCK-3 :
Equipped with 4.0 m K-boom, 2.12 m K-arm, 0.28 m3 (SAE, PCSA heaped) K-bucket.
| Weights of the basic machines [including 750 kg or 1 100 kg K-type counterweight, triple grouser shoes, fuel, hydraulic oil, engine oil and coolant etc.] are: | |
| ZX70-3 | 5 100 kg with 450 mm shoes |
| ZX70LC-3 | 5 200 kg with 450 mm shoes |
| ZX80LCK-3 | 5 800 kg with 450 mm shoes |
| With Blade | |
| ZX70-3 | 5 700 kg with 450 mm shoes |
| ZX70LC-3 | 5 700 kg with 450 mm shoes |
| ZX80LCK-3 | 6 300 kg with 450 mm shoes |
ZX70-3 with Off-Set Front :
Equipped, 1.61 m arm and 0.28 m3 (SAE, PCSA heaped) bucket.
ZX70LC-3 with Off-Set Front :
Equipped, 1.61 m arm, 0.28 m3 (SAE, PCSA heaped) bucket.
| Weights of the basic machines [including 850 kg counterweight, triple grouser shoes, fuel, hydraulic oil, engine oil and coolant etc.] are: | |
| ZX70-3 | 5 200 kg with 450 mm shoes |
| ZX70LC-3 | 5 300 kg with 450 mm shoes |
BACKHOE ATTACHMENTS
Boom and arms are of welded, box-section design. 3.72 m boom, 1.62 m and 2.12 m arms are available.
Buckets
