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Hitachi Excavators ZAXIS75US-A

Hitachi Excavators ZAXIS75US-A
Specifications :
ENGINE
Model Isuzu CC-4JG1
Type 4-cycle water-cooled, direct injection
No. of cylinders 4
Rated power DIN 6271, net 40.5 kW (55 PS) at 2 100 min-1 (rpm)
Rated power SAE J1349, net 40 kW (54 HP) at 2 100 min-1 (rpm)
Maximum torque 196 Nm (20 kgf m, 145 lbf ft) at 1 800 min-1 (rpm)
Piston Displacement 3.059 L (187 n3)
Bore and stroke 96 mm x 107 mm (3.8" x 4.2")
Batteries 2 x 12 V / 52 AH
Governor Mechanical speed control with stepping motor
HYDRAULIC SYSTEM
Swing-independent 3-pump hydraulic system  
OHS(Optimum Hydraulic System)assures fully independent and combined operations  
Auto-idling system  
New-type automatic 2-speed motor increases traction force and travel speed  
Main pumps (Main) 2 variable displacement axial piston pumps
Main pumps (Main) Maximum oil flow 2 x 69.3 L/min (18.3 US gpm, 15.2 lmp gpm)
Main pump (Swing) 1 gear pump
Main pump (Swing) Maximum oil flow 52.5 L/min (13.9 US gpm, 11.6 lmp gpm)
Pilot pump 1 gear pump
Pilot pump Max. oil flow 22.5 L/min (5.9 US gpm, 5.0 lmp gpm)
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, 3 770 psi)
Swing circuit 26.0 MPa (265 kgf/cm2, 3 770 psi)
Travel circuit 31.4 MPa (320 kgf/cm2, 4 550 psi)
Pilot circuit 3.9 MPa (40 kgf/cm2, 570 psi)
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 and quick warm-up system built in the pilot circuit.
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 Mechanism
Axial piston motor with planetary reduction gear is bathed in oil.
Swing circle is single-row, shear-type ball bearing with inductionhardened internal gear. Internal gear and pinion gear are immersed in lubricant. Swing parking brake is spring-set/hydraulic-released disc type.
Swing speed 11.0 min-1 (rpm)
Operator's Cab
US-exclusive cab, independent and roomy cab 1 005 mm (40") wide by 1 675 mm (66") high, conforming to ISO* Standards. Reinforced glass windows on 4 sides for visibility. Openable front windows (upper and lower). Adjustable reclining seat.
* 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. Flat and triangular shoes are also available. 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 40
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.
Travel speed High : 0 to 5.0 km/h (3.1 mph)
Low : 0 to 3.3 km/h (2.1 mph)
Maximum traction force 60 kN (6 120 kgf, 13 500 lbf)
Gradeability 35 degree (70%) continuous
WEIGHTS AND GROUND PRESSURE
ZAXIS75US-A
Equipped with 3.72 m (12'2") boom, 1.62 m (5'4") arm and 0.28 m3 (0.37 d3: SAE, PCSA heaped) bucket.
Weights of the basic machines [including 1 380 kg (3 040 lb), counterweight and triple grouser shoes, excluding front-end attachment, fuel, hydraulic oil, engine oil and coolant etc.] are:
ZAXIS135US 10 600 kg (23 400 lb) with 500 mm (20") shoes
ZAXIS75US-A 5 800 kg (12 800 lb) with 450 mm (18") shoes
SERVICE REFILL CAPACITIES
BACKHOE ATTACHMENTS
Boom and arms are of welded, box-section design. 3.72 m (12'2") boom, 1.62 m (5'4") and 2.12 m (6'11") arms are available.
Bucket is of welded steel structure. Side clearance adjust mechanism provided on the bucket joint bracket.
Buckets

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