Specifications :
ENGINE
| Model | Isuzu AJ-4JJ1X |
| Type | 4-cycle water-cooled, direct injection |
| Aspiration | Turbocharged, intercooled |
| No. of cylinders | 4 |
| Rated power ISO 9249, net | 69.0 kW (93.0 HP) at 2 000 min-1 (rpm) |
| Rated power EEC 80/1269, net | 69.0 kW (93.0 HP) at 2 000 min-1 (rpm) |
| Rated power SAE J1349, net | 69.0 kW (93.0 HP) at 2 000 min-1 (rpm) |
| Maximum torque | 372 Nm (38 kgf m) at 1 600 min-1 (rpm) |
| Piston displacement | 2.999 L |
| Bore and stroke | 95.4 mm x 104.9 mm |
| Batteries | 2 x 12 V / 55 Ah |
HYDRAULIC SYSTEM
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 117 L/min |
| Pilot pump | 1 gear pump |
| Pilot pump Maximum oil flow | 33.6 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 | 32.3 MPa (329 kgf/cm2) |
| Travel circuit | 34.3 MPa (350 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 | 13.7 min-1 (rpm) |
| Swing torque | 34.0 kNm (3 470 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
* 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 | 7 |
| Track shoes | 49 |
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 3.4 km/h |
| Maximum traction force | 102 kN (10 400 kgf) |
| Gradeability | 70% (35 degree) continuous |
WEIGHTS AND GROUND PRESSURE
ZX120-3:
Equipped with 4.60 m boom, 2.52 m arm and 0.50 m3 (SAE, PCSA heaped) bucket.
ZX120-3 with Blade (Optional):
Equipped with 4.60 m boom, 2.52 m arm and 0.50 m3 (SAE, PCSA heaped) bucket.
ZX130K-3:
Equipped with 4.60 m boom, 2.52 m K-arm and 0.50 m3 (SAE, PCSA heaped) K-bucket.
| Weights of the basic machines [including 2 500 kg or 3 100 kg K-type counterweight and triple grouser shoes, excluding front-end attachment, fuel,hydraulic oil,engine oil and coolant etc.] are : | |
| ZX120-3 | 9 400 kg with 500 mm shoes |
| ZX130K-3 | 10 300 kg with 500 mm shoes |
| With Blade | |
| ZX120-3 | 10 500 kg with 500 mm shoes |
SERVICE REFILL CAPACITIES
| Fuel tank | 250.0 L |
| Engine coolant | 16.0 L |
| Engine oil | 17.0 L |
| Swing device | 3.2 L |
| Travel device (each side) | 4.0 L |
| Hydraulic system | 170.0 L |
| Hydraulic oil tank | 70.0 L |
BACKHOE ATTACHMENTS
Boom and arms are of welded, box-section design. 4.60 m monoblock boom, and 2.10 m, 2.52 m and 3.01 m arms are available.
Buckets
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