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17

ENGINE

HYDRAULIC SYSTEM

ENVIRONMENT

SWING SYSTEM

DRIVES AND BRAKES

UNDERCARRIAGE

SERVICE REFILL CAPACITIES

Fuel tank...................................................................................650 ltr

Radiator...................................................................................44,0 ltr

Engine oil.................................................................................37,0 ltr

Swing drive..............................................................................20,0 ltr

Hydraulic tank ..........................................................................248 ltr

Final drive (each side)..............................................................10,5 ltr

Construction.................................................. X-frame centre section

with box section track frames

Track assembly

Type .............................................................................Fully sealed

Shoes (each side)..................................46 (PC490), 49 (PC490LC)

Tension...................................Combined spring and hydraulic unit

Rollers

Track rollers (each side) ............................7 (PC490), 8 (PC490LC)

Carrier rollers (each side) ..............................................................2

Steering control ........................................2 levers with pedals giving

full independent control of each track

Drive method................................................................... Hydrostatic

Travel operation....................................Automatic 3-speed selection

Gradeability .........................................................................70%, 35°

Max. travel speeds

Lo / Mi / Hi ....................................................... 3,0 / 4,2 / 5,5 km/h

Maximum drawbar pull.......................................................34.000 kg

Brake system........................................ Hydraulically operated discs

in each travel motor

Type ..............................................Axial piston motor driving through

planetary double reduction gearbox

Swing lock..................................Electrically actuated wet multi-disc

brake integrated into swing motor

Swing speed..................................................................... 0 - 9,4 rpm

Swing torque ....................................................................... 132 kNm

Engine emissions ..........................Fully complies with EU Stage IIIB

and EPA Tier 4 interim exhaust emission regulations

Noise levels

LwA external ................................107 dB(A) (2000/14/EC Stage II)

LpA operator ear........................71 dB(A) (ISO 6396 dynamic test)

Vibration levels (EN 12096:1997)*

Hand/arm............................≤ 2,5 m/s² (uncertainty K = 0,25 m/s²)

Body ...................................≤ 0,5 m/s² (uncertainty K = 0,10 m/s²)

* for the purpose of risk assessment under directive 2002/44/EC,

please refer to ISO/TR 25398:2006.

Type ..............HydrauMind. Closed-centre system with load sensing

and pressure compensation valves

Additional circuits....................2 additional circuits with proportional

control can be installed

Main pump ............................2 variable displacement piston pumps

supplying boom, arm, bucket, swing and travel circuits

Maximum pump flow...................................................2 × 345 ltr/min

Relief valve settings

Implement.....................................................................380 kg/cm²

Travel.............................................................................380 kg/cm²

Swing ............................................................................285 kg/cm²

Pilot circuit ......................................................................33 kg/cm²

Model .......................................................Komatsu SAA6D125E-6-A

Type ...............................Common rail direct injection, water-cooled,

emissionised, turbocharged, after-cooled diesel

Engine power

at rated engine speed.................................................... 1.900 rpm

ISO 14396..............................................................270 kW/362 HP

ISO 9249 (net engine power) .................................268 kW/359 HP

No. of cylinders ................................................................................6

Bore × stroke...............................................................125 × 150 mm

Displacement.........................................................................11,04 ltr

Battery...................................................................... 2 × 12 V/110 Ah

Alternator............................................................................ 24 V/60 A

Starter motor ................................................................... 24 V/11 kW

Air filter type .......................Double element type with monitor panel

dust indicator and auto dust evacuator

Cooling .................. Suction type cooling fan with radiator fly screen

Fan drive type.................................................... Hydraulic, reversible

Specifications

Operating weight, including specified work equipment, 7,1 m mono boom, 3,4 m arm, 1.915 kg bucket,

operator, lubricant, coolant, full fuel tank and the standard equipment.

OPERATING WEIGHT (APPR.)

PC490-10

PC490LC-10

Triple grouser shoes

Operating weight

Ground pressure

Operating weight

Ground pressure

600 mm

46.690 kg

0,89 kg/cm²

46.960 kg

0,83 kg/cm²

700 mm

47.100 kg

0,77 kg/cm²

47.410 kg

0,72 kg/cm²

800 mm

47.530 kg

0,68 kg/cm²

47.980 kg

0,64 kg/cm²

900 mm

48.460 kg

0,57 kg/cm²

Double grouser shoes

600 mm

46.745 kg

0,89 kg/cm²

46.995 kg

0,83 kg/cm²