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Current number of specifications

Komatsu PC138US-8 Midi Excavator

Selected Dimensions

E. Ground Clearance1.3 ft in395 mm
G. Height to Top of Cab9.2 ft in2815 mm
H. Tail Swing Radius4.9 ft in1480 mm
O. Counterweight Clearance3 ft in900 mm
N. Shoe Size19.7 in500 mm


Swing System
Swing speed (maximum)11 rpm rpm
Swing reductionPlanetary gear
Swing circle lubricationGrease-bathed
Driven byHydraulic motor
Swing lockWet, multiple-disc brake
Horsepower, Gross-SAE J199596.7 hp72.1 kw
Horsepower, Net-ISO 924991.7 hp68.4 kw
Horsepower, Net-SAE J134991.7 hp68.4 kw
Lubrication SystemMethod- Gear pump, force-lubrication; Filter-Full-flow
Starter motor4.5 kW/24 V
Battery64 Ah/2 x 12 V
Number of Cylinders4
Air cleanerDry-type with double elements and auto dust evacuator, plus dust indicator
GovernorAll-speed control, electronic
Power Measured @2200 rpm
Displacement198.9 cu in3.3 L
AspirationTurbocharged, and air-to-air aftercooled
Alternator amps
Bore and Stroke95 mm x 115 mm 3.74" x 4.53"
Fan drive typeMechanical
Fuel systemDirect injection
Drawbar pull, maximum (kg)12500
Gradeability70 %
Travel speed2.9/5.1
Swing drive0.66 gal2.5 L
Fuel Tank51.5 gal195 L
Final Drive0.55 gal2.1 L
Engine Oil2.9 gal11 L
Radiator3.3 gal12.4 L
Hydraulic18.2 gal69 L
Boom size15.1 ft in4.6 m
Boom typeStandard
Arm size8.2 ft in2.5 m
Swing radius4.9 ft in1480 mm
Maximum reach @ ground level26.8 ft in8180 mm
Arm crowd force – ISO6300
Digging depth – maximum18 ft in5480 mm
Arm typeStandard
Digging reach – maximum27.2 ft in8300 mm
Bucket size – KGA standard GP0.69 yd30.53 m3
Bucket crowd force – ISO9500
Number of shoes (each side)43
Centre frameX-frame
Track frameBox-section
Seal of trackSealed track
Track adjusterHydraulic
Shoe Size19.7 in500 mm
Number of Carrier Rollers per Side1
Number of Track Rollers per Side7
shoe typetriple grouser
Operating weight30534 lb13850 kg
Bucket weight - KGA GP992.1 lb450 kg
Quick hitch weight – KGA392.4 lb178 kg
Hydraulic System
TypeHydrauMind System
Selectable work modes5
Economy sub-mode selections4
Main pump typeVariable displacement, axial piston
Maximum flow rate63.8 gal/min241.5 L/min
Hydraulic motor (Travel)2 x piston motor with parking brake
Hydraulic motor (Swing)1 x piston motor with swing holding brake
Parking brakeWet, multiple-disc
Service brakeHydraulic lock
Overall track width8.2 ft in2490 mm
Track Gauge6.5 ft in1990 mm
Track length on ground9.4 ft in2880 mm
Overall length23.8 ft in7260 mm
Height to Top of Cab9.2 ft in2815 mm
Ground Clearance1.3 ft in395 mm
Counterweight Clearance3 ft in900 mm
Tail Swing Radius4.9 ft in1480 mm
Overall Height9.4 ft in2850 mm