PC490LC-10 MH

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Engine   
Model    Komatsu SAA6D125E-6-A* 
Type    Water-cooled, 4-cycle, direct injection 
Aspiration    Turbocharged, aftercooled, cooled EGR 
Number of cylinders   
Bore  4.92"  125 mm 
Stroke  5.91"  150 mm 
Piston displacement  674 in  11.04 ltr 
Horsepower     
SAE J1995 : Gross  362 HP  270 kW 
ISO 9249/SAE J1349 : Net  359 HP  268 kW 
Rated rpm    1900 rpm 
Fan drive type    Hydraulic 
Governor    All-speed control, electronic. 
*EPA Tier 4 Interim and EU stage 3B emissions certified     
Hydraulics   
Type . . HydrauMind (Hydraulic Mechanical Intelligence New Design) system, closed-center system with load sensing valves and pressure compensated valves 
Number of selectable working modes   
Main pump:     
Type    Variable displacement piston type 
Pumps for    Boom, arm, bucket, swing, and travel circuits 
Maximum flow  184 U.S. gal/min  695 ltr/min 
Supply for control circuit    Self-reducing valve 
Hydraulic motors:     
Travel    2 x axial piston motor with parking brake 
Swing    1 x axial piston motor with swing holding brake 
Relief valve setting:     
Implement circuits  5,400 psi  380 kgf/cm/ 37.3 MPa 
Travel circuit  5,400 psi  380 kgf/cm / 37.3 MPa 
Swing circuit  4,055 psi  285 kgf/cm/ 27.9 MPa 
Pilot circuit  470 psi  33 kgf/cm / 3.2 MPa 
Hydraulic cylinders:     
Number of cylinders  Bore x Stroke x Rod Diameter  Bore x Stroke x Rod Diameter 
Boom / 2  7" x 59" x 5"  177.8 mm x 1499 mm x 127 mm 
Arm / 1  7.5" x 78" x 5"  190.5 mm x 1981 mm x 127 mm 
Auxiliary pump for generator:     
Maximum flow  36.7 gal/min  139 ltr/min 
Maximum pressure  3,500 psi  24.2 MPa
246 kg/cm 
Mounting flange    SAE-B, 2 bolt 
Drive spline    15T-16/32DP 
Drives & Brakes   
Steering control    Two levers with pedals 
Drive method    Hydrostatic 
Maximum drawbar pull  73,987 lb  329 kN / 33560 kg 
Gradeability  35  70% 
Maximum travel speed: (Auto-Shift)     
High  3.4 mph  5.5 km/h 
Mid  2.6 mph  4.2 km/h 
Low  1.9 mph  3.0 km/h 
Service brake    Hydraulic lock 
Parking brake    Mechanical disc brake 
Swing System   
Drive method    Hydrostatic 
Swing reduction    Planetary gear 
Swing circle lubrication    Grease-bathed 
Service brake    Hydraulic lock 
Holding brake/Swing lock    Mechanical disc brake 
Swing speed    9.1 rpm 
Swing torque  97,024 ft. lbs.  13414 kgm 
Undercarriage   
Center frame    X-frame 
Track frame    Box-section 
Seal of track    Sealed track 
Track adjuster    Hydraulic 
Number of shoes    49 each side 
Number of carrier rollers    4 each side 
Number of track rollers    8 each side 
Coolant & Lubricant Capacity (refilling)   
Fuel tank  172 U.S. gal  650 ltr 
Coolant  11.6 U.S. gal  44 ltr 
Engine  10.0 U.S. gal  38.0 ltr 
Final drive, each side  2.9 U.S. gal  11.0 ltr 
Swing drive  5.3 U.S. gal  20 ltr 
Hydraulic tank  65.5 U.S. gal  248 ltr 
Hydraulic system  124.7 U.S. gal  472 ltr 
Operating Weight (approximate)   
Operating weight without work tool (approximate)
Operating weight includes KO2US55 2-piece 16.8 m / 55' front, counterweight for MH 12317 kg / 27,450 lb, widen carbody, 78" cab riser, 25kw generator, rated capacities of lubricants, coolant, full fuel tank, operator and standard equipment. 
Triple-Grouser Shoes  28"  700 mm 
Operating Weight  126,530 lb  57410 kg 
Ground Pressure  13.4 psi  0.94 kg/cm 
Triple-Grouser Shoes  31.5''  800 mm 
Operating Weight:  127,630 lb  57910 kg 
Ground Pressure  11.8 psi  0.83 kg/cm 
Triple-Grouser Shoes  35.5"  900 mm 
Operating Weight:  128,710 lb  58400 kg 
Ground Pressure  10.6 psi  0.74 kg/cm 
For KOUS54 3-piece 16.5 m 54' front, add weight 105 kg 230 lb     

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