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EQUIPMENT

18

ENGINE

Model ......................... Isuzu AH-6WG1XYSA-02 Type ............................ 4-cycle water-cooled, direct injection Aspiration . .................. Turbocharged No. of cylinders ........... 6 Rated power ISO 9249, Without Fan net

H/P mode:

345 kW (463 HP) at 1 800 min -1 (rpm) EEC 80/1269, Without Fan net

H/P mode:

345 kW (463 HP) at 1 800 min -1 (rpm) Maximum torque ......... 1 980 Nm (202 kgf

m) at 1 500 min -1 (rpm) Piston displacement . .. 15.681 L Bore and stroke .......... 147 mm x 154 mm Batteries ..................... 2 x 12 V / 170 Ah

HYDRAULIC SYSTEM

• Work mode selector

General purpose mode / Attachment mode • Engine speed sensing system

Main pumps . .............. 2 variable displacement axial piston pumps Maximum oil fow ..... 2 x 456 L/min Pilot pump .................. 1 gear pump Max. oil fow ............ 30 L/min

Hydraulic Motors

Travel .......................... 2 axial piston motors with parking brake Swing ......................... 2 axial piston motors

Relief Valve Settings

Implement circuit . ....... 31.9 MPa (325 kgf/cm 2 ) Swing circuit ............... 29.4 MPa (300 kgf/cm 2 ) Travel circuit ................ 34.3 MPa (350 kgf/cm 2 ) Pilot circuit .................. 3.9 MPa (40 kgf/cm 2 ) Power boost ............... 34.3 MPa (350 kgf/cm 2 )

Hydraulic Cylinders

High-strength piston rods and tubes. Cylinder cushion mechanisms provided in boom and arm cylinders to absorb shock at stroke ends.

Dimensions

Quantity Bore Rod diameter Boom 2 190 mm 130 mm Arm 1 200 mm 140 mm Bucket 1 180 mm 130 mm Bucket (BE) 1 190 mm 130 mm

Hydraulic Filters

Hydraulic circuits use high-quality hydraulic filters. A suction filter is incorporated in the suction line, and full-fow flters 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

ZX670LCH -3

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 inductionhardened internal gear. Internal gear and pinion gear are immersed in lubricant. Swing parking brake is spring-set/hydraulic-released disc type. Swing speed ............... 9.5 min -1 (rpm)

Operator's Cab

Independent spacious cab, 1 005 mm wide by 1 795 mm high, conforming to ISO* Standards. (OPG top guard ftted Level II (ISO 10262) compliant cab)

Reinforced glass windows on 4 sides for visibility. Reclining seat with armrests; adjustable with or without control levers. * International Standardization Organization

UNDERCARRIAGE

Tracks

Tractor-type undercarr iage. Welded track f rame using selected materials. Side frame bolted to track frame. Lubricated track rollers, idlers, and sprockets with foating seals.

Track shoes with double 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 ............... 3 Lower rollers ............... 8 Track shoes ................ 47 Full track guard ........... 1

Travel Device

Each track driven by axial piston motor through reduction gear for counter rotation of the tracks. Sprockets are replaceable. Parking brake is spring-set/hydraulic-released disc type. Automatic transmission system: High-Low. Travel speeds .............. High : 0 to 4.9 km/h

Low : 0 to 3.4 km/h

Maximum traction

force ........................... 460 kN (46 920 kgf)

Gradeability . ............... 35° (70%) continuous

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