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Mid-size excavator

PC138USLC-11

  • Horsepower 72.5 kW @ 2 050 rpm 97.2 HP @ 2,050 rpm
  • Operating weight 15 682 - 17 032 kg 34,563 - 37,547 lbs.
  • Bucket capacity 0.26 - 0.76 m³ 0.34 - 1.00 yd³

Stability and power for tight spaces

Built for working in tight spaces like roadways, bridges or urban areas, this tight tail swing radius excavator is designed for exceptional stability, with responsive quick arm speed and a purpose-built cab for operator comfort.

  • Quick and powerful
  • Impressive fuel efficiency
  • Spacious and comfortable
  • Designed for exceptional stability

Features and benefits

Short implement swing radius

Get greater clearance when space is limited with a higher boom raise angle than our standard excavator that reduces the minimum front implement swing radius.

Short tail swing radius

Get more done in confined areas with the short tail swing radius that allows the machine to work in more spaces than our conventional excavator.

Rounded cab design with sliding door

High maneuverability is achieved through the purpose-built cabs that swings within the same radius as the counterweight. The sliding cab door allows operators to easily enter and exit when space is limited.

Stable platform

The compact counterweights provide exceptional lifting capability and stability providing a comfortable, confident operating experience.

Arm quick return valve

Help improve efficiency with the quick return valve that directs additional oil through a second line directly back to the tank when the arm is extended, helping to reduce back pressure and fuel consumption.

Efficient hydraulic system

For quick response to operator demands, the closed-center loading system (CLSS) helps improve fuel efficiency. Pilot proportional control (PPC) hydraulics and optional proportional joysticks provide exceptional control.

Specifications for PC138USLC-11

Close all Expand all
US system Metric
Engine
Model Komatsu SAA4D95LE-7*
Type Water-cooled, 4-cycle, direct injection
Aspiration Variable flow, turbocharged, air-to-air aftercooled
Number of cylinders 4
Bore 95 mm
Stroke 115 mm
Piston displacement 3.26 L
Horsepower:
SAE J1995 / Gross 72.6 kW
ISO 9249 / SAE J1349 / Net 72.5kW
Rated rpm 2 050
Fan at maximum speed /Net 67.8 kW
Fan drive method for radiator cooling Mechanical with viscous clutch
Governor All-speed control, electronic

*EPA Tier 4 Final emissions certified

Model Komatsu SAA4D95LE-7*
Type Water-cooled, 4-cycle, direct injection
Aspiration Variable flow, turbocharged, air-to-air aftercooled
Number of cylinders 4
Bore 3.74 in
Stroke 4.53 in
Piston displacement 199 in³
Horsepower:
SAE J1995 / Gross 97.3 HP
ISO 9249 / SAE J1349 / Net 97.2 HP
Rated rpm 2,050
Fan at maximum speed /Net 90.9 HP
Fan drive method for radiator cooling Mechanical with viscous clutch
Governor All-speed control, electronic

*EPA Tier 4 Final emissions certified

Hydraulics

Type: HydrauMind (Hydraulic Mechanical Intelligence) system, closed-center system with load sensing valve and pressure compensated valve

Number of selectable working modes 6
Main pump:
Type Variable capacity piston type
Pumps for Boom, arm, bucket, swing, and travel circuits
Maximum flow 242 L/min
Hydraulic motors:
Travel 2 x piston motor with parking brake
Swing 1 x piston motor with swing holding brake
Relief valve setting:
Implement circuits 34.8 MPa / 355 kgf/cm2
Travel circuit
34.8 MPa / 355 kgf/cm2
Swing circuits 29.2 MPa / 298 kgf/cm²
Pilot circuit 3.2 MPa / 33 kgf/cm²
Maximum Auxiliary Flow
at 250 kgf/cm2
242 L/min
Hydraulic cylinders / Number of cylinders: bore x stroke x rod diameter
Boom / 2 105 x 1 055 x 70 mm
Arm / 1 110 x 1 175 x 75 mm
Bucket / 1 95 x 885 x 65 mm

* Auxiliary flow is adjustable through the monitor.

Type: HydrauMind (Hydraulic Mechanical Intelligence) system, closed-center system with load sensing valve and pressure compensated valve

Number of selectable working modes 6
Main pump:
Type Variable capacity piston type
Pumps for Boom, arm, bucket, swing, and travel circuits
Maximum flow 64 US gpm
Hydraulic motors:
Travel 2 x piston motor with parking brake
Swing 1 x piston motor with swing holding brake
Relief valve setting:
Implement circuits 5,050 psi
Travel circuit
5,050 psi
Swing circuits 4,240 psi
Pilot circuit 470 psi
Maximum Auxiliary Flow
at 3,553 psi*
64 US gpm
Hydraulic cylinders / Number of cylinders: bore x stroke x rod diameter
Boom / 2 4.1 x 41.5 x 2.76 in
Arm / 1 4.3 x 46.3 x 2.95 in
Bucket / 1 3.7 x 34.8 x 2.56 in

* Auxiliary flow is adjustable through the monitor.

Drives and Brakes
Steering control Two levers with pedals
Drive method Fully hydrostatic
Maximum drawbar pull 123 kN 12 500 kgf 
Gradeability 70%, 35°
Maximum travel speed:
High 5.1 kph
Low 2.9 kph
Service brake Hydraulic lock
Parking brake Wet, multiple-disc
Steering control Two levers with pedals
Drive method Fully hydrostatic
Maximum drawbar pull 27,560 lbf.
Gradeability 70%, 35°
Maximum travel speed:
High 3.2 mph
Low 1.8 mph
Service brake Hydraulic lock
Parking brake Wet, multiple-disc
Swing System
Driven by Hydraulic motor
Swing reduction Planetary gear
Swing circle lubrication Grease-bathed
Swing lock Wet, multiple-disc brake
Swing speed 11.0 rpm
Swing torque 2 991 kg-m
Driven by Hydraulic motor
Swing reduction Planetary gear
Swing circle lubrication Grease-bathed
Swing lock Wet, multiple-disc brake
Swing speed 11.0 rpm
Swing torque 21,627 ft.-lbs.
Undercarriage
Center frame X-leg frame
Track frame Box-section
Track type Sealed track
Track adjuster Hydraulic
Number of shoes 46 each side
Number of carrier rollers 2 each side
Number of track rollers 8 each side
Center frame X-leg frame
Track frame Box-section
Track type Sealed track
Track adjuster Hydraulic
Number of shoes 46 each side
Number of carrier rollers 2 each side
Number of track rollers 8 each side
Sound Performance
Exterior – ISO 6395 101 dB(A)
Operator – ISO 6396
71 dB(A)
Exterior – ISO 6395 101 dB(A)
Operator – ISO 6396
71 dB(A)
Coolant & Lubricant Capacity (Refilling)
Fuel tank 200 L
Coolant 17.7 L
Engine 11.5 L
Final drive, each side 2.1 L
Swing drive 2.5 L
Hydraulic tank 69 L
DEF tank 12.6 L
Fuel tank 52.8 US gal
Coolant 4.6 US gal
Engine 3.0 US gal
Final drive, each side 0.55 US gal
Swing drive 0.7 US gal
Hydraulic tank 18.2 US gal
DEF tank 3.3 US gal
Operating Weight (Approximate)

Operating weight includes 4 600 mm one-piece boom, 2 500 mm arm, SAE heaped 0.51 m3 backhoe bucket, rated capacity of lubricants, coolant, full fuel tank, operator, and standard equipment.

Triple-Grouser Operating Weight Ground Pressure
500 mm
15 682 kg
45.29 kPa / 0.46 kg/cm2
600 mm
15 732 kg
37.86 kPa / 0.39 kg/cm2
700 mm
15 932 kg
32.87 kPa / 0.34 kg/cm2

Operating weight includes 15 ft. 1 in one-piece boom, 8 ft. 2 in arm, SAE heaped 0.67 yd3 backhoe bucket, rated capacity of lubricants, coolant, full fuel tank, operator, and standard equipment.

Triple-Grouser Operating Weight Ground Pressure
20 in 34,563 lbs.
6.57 psi
24 in 35,673 lbs.
5.49 psi
28 in 35,114 lbs. 4.77 psi

ENGINE

  • Air cleaner, double element with auto dust evacuator
  • Cooling fan, viscous type
  • Debris guards for radiator and oil cooler
  • Engine, Komatsu SAA4D95LE-7
  • Engine overheat prevention system 

ELECTRICAL SYSTEM

  • Alternator, 24 V/60 A
  • Auto-decelerator
  • Batteries, 2 x 12 V/72 Ah
  • Electric horn
  • Starting motor 24 V/4.5 kW
  • Working light on boom
  • Working lights on cab (2)

HYDRAULIC SYSTEM

  • Boom holding valve

GUARDS AND COVERS

  • Fan guard structure
  • Handrails
  • Pump/engine partition cover

UNDERCARRIAGE

  • Shoe, 600 mm triple grouser

OPERATOR ENVIRONMENT

  • 2 x 12 V power points
  • 2 way multi-control valve
  • 24 V - 12 V power converter
  • Automatic A/C
  • Auto idle shutdown function
  • Auxiliary input jack
  • Cab includes: antenna, AM/FM radio, floor mat, intermittent front windshield wiper and washer, large ceiling hatch, pull-up front window, removable lower windshield
  • Foldable mirror (LH)
  • Large high resolution LCD monitor
  • Lock lever
  • Mirror (Rear)
  • Operator identification function
  • Operator protective top guard, OPG level 1 (ISO 10262)
  • Rear view monitor system
  • ROPS cab (ISO 12117-2)
  • Seat belt, 76 mm
  • Suspension seat
  • Swing holding brake

OTHER

  • Counterweight (total mass), 3460 kg  
  • Equipment management monitoring system
  • KOMTRAX®
  • Pattern change valve
  • Rear reflector
  • Travel alarm

ENGINE

  • Air cleaner, double element with auto dust evacuator
  • Cooling fan, viscous type
  • Debris guards for radiator and oil cooler
  • Engine, Komatsu SAA4D95LE-7
  • Engine overheat prevention system 

ELECTRICAL SYSTEM

  • Alternator, 24 V/60 A
  • Auto-decelerator
  • Batteries, 2 x 12 V/72 Ah
  • Electric horn
  • Starting motor 24 V/4.5 kW
  • Working light on boom
  • Working lights on cab (2)

HYDRAULIC SYSTEM

  • Boom holding valve

GUARDS AND COVERS

  • Fan guard structure
  • Handrails
  • Pump/engine partition cover

UNDERCARRIAGE

  • Shoe, 24" triple grouser

OPERATOR ENVIRONMENT

  • 2 x 12 V power points
  • 2 way multi-control valve
  • 24 V - 12 V power converter
  • Automatic A/C
  • Auto idle shutdown function
  • Auxiliary input jack
  • Cab includes: antenna, AM/FM radio, floor mat, intermittent front windshield wiper and washer, large ceiling hatch, pull-up front window, removable lower windshield
  • Foldable mirror (LH)
  • Large high resolution LCD monitor
  • Lock lever
  • Mirror (Rear)
  • Operator identification function
  • Operator protective top guard, OPG level 1 (ISO 10262)
  • Rear view monitor system
  • ROPS cab (ISO 12117-2)
  • Seat belt, 3"
  • Suspension seat
  • Swing holding brake

OTHER

  • Counterweight (total mass), 7,630 lb
  • Equipment management monitoring system
  • KOMTRAX®
  • Pattern change valve
  • Rear reflector
  • Travel alarm

HYDRAULIC SYSTEM

  • Hydraulic control unit - 1 additional actuator (+ 1 Hydraulics) with one and two-way flow

GUARDS AND COVERS

  • Cab guard
    — Full front guard, OPG level 1 (ISO 10262)
    — Full front guard, OPG level 2 (ISO 10262)
    — Bolt-on top guard, OPG level 2 (ISO 10262)

UNDERCARRIAGE

  • Extended track frame steps for 700 mm tracks
  • Shoes
    — 500 mm triple grouser
    — 700 mm triple grouser
    — 500 mm rubber roadliner

OPERATOR ENVIRONMENT

  • Sunvisor

WORK EQUIPMENT

  • Arms
    — 2500 mm arm assembly
    — 2500 mm arm assembly with piping
    — 3000 mm arm assembly
    — 3000 mm arm assembly with piping
  • Booms
    — 4600 mm boom assembly
    — 4600 mm boom assembly with piping
  • Blade
    — 2490 mm
    wide blade

HYDRAULIC SYSTEM

  • Hydraulic control unit - 1 additional actuator (+ 1 Hydraulics) with one and two-way flow

GUARDS AND COVERS

  • Cab guard
    — Full front guard, OPG level 1 (ISO 10262)
    — Full front guard, OPG level 2 (ISO 10262)
    — Bolt-on top guard, OPG level 2 (ISO 10262)

UNDERCARRIAGE

  • Extended track frame steps for 28" tracks
  • Shoes
    — 20" triple grouser
    — 28" triple grouser
    — 20" rubber roadliner

OPERATOR ENVIRONMENT

  • Sunvisor

WORK EQUIPMENT

  • Arms
    — 8'2" arm assembly
    — 8'2" arm assembly with piping
    — 9'10" arm assembly
    — 9'10" arm assembly with piping
  • Booms
    — 15'1" boom assembly
    — 15'1" boom assembly with piping
  • Blade
    8'6" wide blade
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