Dozer D71PXi Cartersville GA Qube 201104 3K1A2087 1

Experience unmatched power and versatility with the PC390LC-11 excavator, equipped with a long boom and three arm options for extended reach and depth. Tailored for large-scale construction projects or intensive underground utility work, this machine guarantees exceptional digging performance for your most demanding tasks.

  • Increased Power and Performance: Benefit from a 13% boost in horsepower and an impressive up to 8% increase in overall performance, ensuring that the excavator handles challenging jobs with ease.
  • Versatility in Application Configurations: Enjoy the flexibility of two application configurations, allowing the machine to adapt seamlessly to different project requirements. This versatility enhances its suitability for a variety of tasks.
  • Exceptional Operator Awareness: Prioritize safety and efficiency with features designed to provide operators with exceptional awareness. A focus on operator comfort and control ensures optimized performance on the job.
  • Designed for Serviceability: Minimize downtime and streamline maintenance tasks with a design that prioritizes serviceability. Accessible components and user-friendly features contribute to efficient and hassle-free servicing.

Whether you’re tackling extensive construction projects or intricate utility work below ground, the PC390LC-11 excavator stands ready to deliver the power, versatility, and reliability you need for your toughest jobs.

Product Features and benefits:

  1. Powerful Engine:
    • 13% more horsepower (HP) and up to 8% greater productivity.
    • Tier 4 Final-compliant engine without needing diesel exhaust fluid or a selective catalytic converter.
    • Auto idle shutdown timer and a thermostatically controlled variable-speed cooling fan.
  2. Reinforced Structures:
    • Strengthened revolving, center, and crawler frames to withstand tough applications.
    • Large cross-section structures use high-tensile-strength steel for increased durability and resistance to bending and torsional stresses.
  3. Improved Serviceability:
    • Easy access to the engine, hydraulic system, and maintenance service areas with center and large left side walkways.
    • Engine air cleaners relocated outside the engine compartment for convenient access.
  4. Enhanced Cab:
    • Large pressurized cab with a 7-inch color monitor.
    • Fully adjustable, heated air-suspension seat for operator comfort.
    • Optional 45° hydraulic access ladder for ease of operator entry and exit.
  5. Enhanced Hydraulic System:
    • Smarter hydraulics with increased flow at higher pressures.
    • New EPC valves improve machine logic to match working loads.
    • New filter by-pass sensors monitor system health and alert operators if clogging conditions exist.
  6. Improved Operator Awareness:
    • Standard KomVision camera system provides a bird’s-eye view of the surrounding area for improved operator situational awareness.
    • Komtrax Plus enables expanded monitoring of the fleet via satellite and wireless LAN.

Product Specifications for PC1250LC-11:

Engine:

  • Model: Komatsu SAA6D170E-7*
  • Type: Water-cooled, 4-cycle, direct injection
  • Aspiration: Turbocharged, aftercooled, cooled, EGR
  • Number of cylinders: 6
  • Bore: 6.69 in
  • Stroke: 6.69 in
  • Piston displacement: 1,413 in³
  • Governor: All-speed, electronic

Horsepower:

  • SAE J1995 – Gross: 775 HP
  • ISO 9249 / SAE J1349 – Net: 758 HP
  • Rated rpm: 1,800 rpm
  • Hydraulic fan at maximum speed – Net: 696 HP
  • Governor: All-speed control, electronic
  • Fan drive method for radiator cooling: Hydraulic

*EPA Tier 4 Final emissions certified

Hydraulics:

  • Type: Open-center load sensing system, 1 selectable working mode
  • Main pump:
    • Type: Variable capacity piston
    • Maximum flow implement and travel: 2 x 130.5 gpm
    • Maximum flow swing: 1 x 158.5 gpm
  • Sub-pump for control circuit: Gear type
  • Fan drive pump: Variable-capacity piston type
  • Hydraulic motors: Gear pump
    • 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
    • Travel circuit: 4,980 psi
    • Swing circuit: 4,267 psi
    • Pilot circuit: 455 psi
  • Hydraulic cylinders:
    • Cylinder / Number of cylinders:
      • Boom / 2: 8.9 x 94.1 x 6.3 in
      • Arm / 1: 9.8 x 95.9 x 6.7 in
    • Bucket:
      • Standard / 2: 6.3 x 71.8 x 4.5 in
      • SP / 2: 6.3 x 76.8 x 4.5 in

Drives and Brakes:

  • Steering control: Two levers with pedals
  • Drive method: Fully hydrostatic
  • Travel motor: Axial piston motor, in-shoe design
  • Reduction system: Planetary triple reduction
  • Maximum drawbar pull: 154,320 lbf.
  • Gradeability: 70%, 35°
  • Maximum travel speed:
    • High: 2.0 mph
    • Low: 1.5 mph
  • Service brake: Hydraulic lock
  • Parking brake: Oil disc brake

Swing System:

  • Drive method: 2 x hydraulic motors
  • Swing reduction: Planetary gear
  • Swing circle lubrication: Grease-bathed
  • Service brake: Oil disc brake
  • Holding brake/swing lock: Mechanical disc brake
  • Swing speed: 5.8 rpm
  • Swing torque: 299,524 lbs.-ft.

Undercarriage:

  • Center frame: H-leg frame
  • Track frame: Box-section
  • Track type: Sealed
  • Track adjuster: Hydraulic
  • Number of carrier rollers (each side): 3
  • Number of shoes (each side):
    • Standard, SP: 48
    • Long undercarriage: 55
  • Number of track rollers (each side):
    • Standard, SP: 8
    • Long undercarriage: 10

Coolant and Lubricant Capacity (refilling):

  • Fuel tank: 359.3 US gal
  • Coolant: 37.5 US gal
  • Engine: 22.7 US gal
  • Final drive, each side: 5.5 US gal
  • Swing drive: 2 x 5.3 US gal
  • Hydraulic tank: 177.0 US gal

Sound Performance:

  • Exterior – ISO 6395: 109.9 dB(A)
  • Operator – ISO 6396: 68.5 dB(A)

Operating Weight (Approximate):

  • Backhoe:
    • PC1250LC-11: Operating weight, including 29 ft. 10 in boom, 11 ft. 2 in arm, 6.5 yd³ bucket, operator, lubricant, coolant, full fuel tank, and standard equipment.
    • PC1250LC-11 Gauge
      • Double-Grouser Shoes:
        • 39.4 in: Operating Weight: 269,300 lbs. Ground Pressure (ISO 16754): 13.45 psi
        • 47.25 in: Operating Weight: 272,600 lbs. Ground Pressure (ISO 16754): 11.35 psi

Further information on this machine can be viewed by visiting this link https://www.komatsu.com/products/excavators/large-excavators/pc1250lc-11

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DISCLAIMER: The information that has been provided in this article is sourced from https://www.komatsu.com. The author does not assume any responsibility or liability for the accuracy, completeness, or usefulness of the information provided. The author shall not be held liable for any loss or damage resulting from the use of this content. For further information please contact the manufacturer directly.