Komatsu PC1250LC-8

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Features

High-Pressure In-line Filtration

The PC1250LC-8 has the most extensive filtration system available, providing in-line filters as standard equipment. An in-line high pressure filter in the outlet port of each main hydraulic pump reduces failures caused by contamination.

Low Vibration with Cab Damper Mounting

The PC1250LC-8 uses a new, improved cab damper mount system that incorporates longer stroke and the addition of a spring. The new cab damper mounting, combined with a strengthened left and right side deck, aids vibration reduction at the operator’s seat.

Vibration at the floor is reduced from 120 dB (VL) to 115 dB (VL).

Wide Catwalk Large Steps and Handrails

Easier, safer operator cab access and maintenance checks.

High-Quality EMMS Self-diagnostic System

• Abnormality Checking Function

If an abnormality should occur, the monitoring system checks whether hydraulic pressures, solenoid ON/OFF status, engine speed, electrical connections, etc. are within normal operating range.

• Maintenance History Memory Function

Maintenance records such as replacement of engine oil, hydraulic oil, filters, can be stored. Operator is warned when service is due.

• Trouble Data Memory Function

Trouble data is stored to serve as reference for future troubleshooting. Error codes are displayed to aid in service diagnosis.

Specifications

Engine    
Model   Komatsu SAA6D170E-5
Type   4-cycle, water-cooled, direct injection
Aspiration   Turbocharged, aftercooled, cooled EGR
Number of cylinders   6
Bore 6.69" 170 mm
Stroke 6.69" 170 mm
Piston displacement 1,413 in³ 23.15 ltr
Governor   All-speed, electronic
Horsepower:    
SAE J1995 - Gross 688 HP 514 kW
ISO 9249 / SAE J1349 - Net 672 HP 502 kW
Hydraulic fan at maximum speed - Net 620 HP 463 kW
Rated rpm   1800 rpm
Fan drive type   Hydraulic, variable speed, reversible
EPA Tier 3 and EU stage 3A emission certified.    
     
Hydraulic System    
Type   Open-center load sensing system
Number of selectable working modes   2
Main pump:    
Type   Variable capacity piston pumps
Pumps for   Boom, arm, bucket, swing, and travel circuits
Maximum flow:    
For implement and travel 2 x 130.5 U.S. gpm 2 x 494 ltr/min
For swing 1 x 158.5 U.S. gpm 1 x 600 ltr/min
Sub-pump for control circuit   Gear pump
Hydraulic motors:    
Travel   2 x axial piston motors with parking brake
Swing   2 x axial piston motors with swing holding brake
Relief valve setting:    
Implement circuits 4,550 psi 31.4 MPa
320 kg/cm²    
Travel circuit 4,980 psi 34.3 MPa
350 kg/cm²    
Swing circuit 3,910 psi 27.0 MPa
275 kg/cm²    
Pilot circuit 430 psi 2.9 MPa
30 kg/cm²    
Hydraulic cylinders:    
Cylinder / Number of cylinders Bore x Stroke Bore x Stroke
Backhoe    
Boom / 2 8.9" x 94.1" 225 mm x 2390 mm
Arm / 1 9.8" x 95.9" 250 mm x 2435 mm
Bucket:    
Std / 2 6.3" x 71.8" 160 mm x 1825 mm
SP / 2 6.3" x 76.8" 160 mm x 1950 mm
     
Swing System    
Driven by   2 x Hydraulic motor
Swing reduction   Planetary gear
Swing circle lubrication   Grease-bathed
Swing lock   Oil disc brake
Swing speed   5.5 rpm
     
Drives and Brakes    
Steering control   Two levers with pedals
Drive method   Fully hydrostatic
Travel motor   Axial piston motor, in-shoe design
Reduction system   Planetary double reduction
Maximum drawbar pull 154,320 lb 686 kN
70000 kg    
Gradeability   70%
Maximum travel speed:    
High 2.0 mph 3.2 km/h
Low 1.3 mph 2.1 km/h
Service brake   Hydraulic lock
     
Undercarriage    
Center frame   H-leg frame
Track frame   Box-section
Track type   Sealed
Track adjuster   Hydraulic
No. of shoes:    
Standard, SP, Shovel   48 each side
LC   55 each side
No. of carrier rollers   3 each side
No. of track rollers:    
Standard, SP, Shovel   8 each side
LC   10 each side
     
Coolant and Lubricant Capacity (refilling)    
Fuel tank 359.3 US gal 1360 ltr
Radiator 37.5 US gal 142 ltr
Engine 22.7 US gal 86 ltr
Final drive, each side 5.5 US gal 21 ltr
Swing drive 2 x 6.4 US gal 2 x 24.3 ltr
Hydraulic tank 177.0 US gal 670 ltr
PTO 3.6 US gal 13.5 ltr