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Komatsu Excavators PC1250LC-8


Komatsu Excavators PC1250-8
Specifications :
Engine
Model
Komatsu SAA6D170E-5
Type
4-cycle, water-cooled, direct injection
Aspiration
Turbocharged, aftercooled, cooled EGR
Number of cylinders
6
Bore6.69"170 mm
Stroke6.69"170 mm
Piston displacement1,413 in³23.15 ltr
Governor
All-speed, electronic
Horsepower:

SAE J1995 - Gross688 HP514 kW
ISO 9249 / SAE J1349 - Net672 HP502 kW
Hydraulic fan at maximum speed - Net620 HP463 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 travel2 x 130.5 U.S. gpm2 x 494 ltr/min
For swing1 x 158.5 U.S. gpm1 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 circuits4,550 psi31.4 MPa
320 kg/cm²
Travel circuit4,980 psi34.3 MPa
350 kg/cm²
Swing circuit3,910 psi27.0 MPa
275 kg/cm²
Pilot circuit430 psi2.9 MPa
30 kg/cm²
Hydraulic cylinders:

Cylinder / Number of cylindersBore x StrokeBore x Stroke
Backhoe

Boom / 28.9" x 94.1"225 mm x 2390 mm
Arm / 19.8" x 95.9"250 mm x 2435 mm
Bucket:

Std / 26.3" x 71.8"160 mm x 1825 mm
SP / 26.3" x 76.8"160 mm x 1950 mm

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 pull154,320 lb686 kN
70000 kg
Gradeability
70%
Maximum travel speed:

High2.0 mph3.2 km/h
Low1.3 mph2.1 km/h
Service brake
Hydraulic lock

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

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 & Lubricant Capacity (refilling)
Fuel tank359.3 US gal1360 ltr
Radiator37.5 US gal142 ltr
Engine22.7 US gal86 ltr
Final drive, each side5.5 US gal21 ltr
Swing drive2 x 6.4 US gal2 x 24.3 ltr
Hydraulic tank177.0 US gal670 ltr
PTO3.6 US gal13.5 ltr


Features

PRODUCTIVITY FEATURES:
Heavy Lift Mode
Heavy lift mode increases lifting force by 10%.
Large Digging Force
High operation efficiency with large digging force for severe applications.
Two-mode Setting for Boom
Switch selection allows either powerful digging or smooth boom operation.
Twin Swing Motor System provides excellent swing performance, even on slopes.
Large Drawbar Pull and Steering Force
provide excellent mobility.
Swing Priority Mode
Swing priority mode improves efficiency for loading dump trucks at 90° or 180° swing angles.
Shockless Boom
Switch selection reduces chassis vibration after sudden stops.
EXCELLENT RELIABILITY AND DURABILITY:
Booms and arms are constructed of thick one-piece plates and large castings for extended service life
Fuel Pre-filters with water separator equipped as standard
O-ring Face Seals, which have excellent sealing performance, are used for the hydraulic hoses
High-pressure In-line Filtration
The cool-running hydraulic system is protected with the most extensive filtration system available, including a high pressure in-line filter for each main pump.
EASY MAINTENANCE:
Easy Cleaning of Cooling Unit
Fan reverse-rotation function helps keep radiator and oil cooler clean.
Centralized Arrangement of Engine Checkpoints
Slip-resistant Plates for improved foot traction
Large Handrails, Steps and Catwalk provide easy access to the engine, hydraulic equipment, and cab
Highly Reliable Electronic Devices
Exclusively designed electronic devices have passed severe testing
• Controllers
• Sensors
• Connectors
• Heat resistant wiring
• Circuit breaker
Boom Foot Hoses are arranged under the boom foot, improving hose life and safety
ECOLOGY AND ECONOMY FEATURES:
Komatsu SAA6D170E-5 Engine is EPA Tier 3 Emissions Certified
• World’s first cooled EGR system with bypass-assist type electronically controlled venturi
• Offers high power and low fuel consumption, while conforming to EPA Tier 3 emission regulations
• Reduces NOx emissions by approximately 40%
• Equipped with an electronically controlled variable speed reversible fan
Economy Mode Four-level Setting
Enables operator to select the appropriate Economy mode level to match production requirement with lowest fuel consumption.
Reduction of Ambient Noise
• Electronically controlled variable speed fan drive
• Large hybrid fan
• Glasswool type low-noise muffler with noise reducing cover
Working Environment:
Large Comfortable Cab
• Low noise and vibration with cab damper mounting
• Large-capacity automatic air conditioner
• Pressurized cab prevents external dust from entering
• OPG top guard level 2 is standard (ISO 10262)
Advanced Monitor Features:
• Machine condition can be checked with Equipment Management Monitoring System (EMMS)
• EMMS provides PM scheduling, error code, and failure diagnostic functions
• Two working modes combine with heavy lift mode for maximum productivity


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