• 6,505 - 6,836 lbs Operating Weight
  • 24.4 @ 2200 rpm Horsepower
  • 0.07 - 0.21 yd¬≥ Bucket Capacity

PC30MR-5 Small Hydraulic Excavator

Small but powerful, the PC30MR-5 hydraulic excavator is constructed like a big Komatsu excavator with a high strength x-frame, PPC joysticks, pattern change valve but with the addition of a swinging boom, three track option and tight tail swing. If you need versatility in a small package, Komatsu mini-excavators are just what you are looking for.

PC30MR-5 Walkaround  >


New Engine Technologies

The PC30MR-5 is equipped with a clean engine that complies with the EPA Tier 4 Final emission regulations. The engine uses proven environment friendly technologies such as an exhaust gas aftertreatment system, an electronically-controlled cooled Exhaust Gas Recirculation (EGR) system, and an optimum fuel injection system using a common rail. These technologies, combined with Komatsu’s own electronic control system, minimize environmental impact and improve fuel economy.

Electronic Control System

The engine and hydraulic system are optimally controlled according to the operating conditions. The hydraulic loss reductions also help reduce both fuel consumption and environmental impact.

Fuel consumption

Reduced Up To 5% Fuel consumption

Comparison with Komatsu’s prior models

The average working pattern is analyzed by KOMTRAX. The above data may differ from actual fuel consumption depending on the type of work. The fuel consumption data is based on in-house comparison test results.

Multi-Function Monitor

Various alerts and machine information are displayed in a simple format. Useful information such as operation records, machine setting and maintenance data are also provided. The operator can easily switch screens.

Efficient and Effective Maintenance

Large service compartment doors and tilting cab platform provide simplified daily inspection and maintenance. Large engine and cooler compartment doors simplify daily inspection and periodic maintenance activities. The operator platform tilts forward providing unimpeded access to hydraulic and engine components for maintenance or repair work.

Minimum Swing Radius

The extra-small swing radius with minimum rear protrusion from the tracks (25mm for PC30MR-5) allows the operator to concentrate on work in confined areas.

Enhanced Working Environment

  • Mid back, suspension operator seat
  • Integrated ROPS cab design (ISO 3741:2008)
  • Cab meets ISO Level 1 Operator Protective Guard (OPG) top guard (ISO 10262)
  • Two post canopy or optional ROPS cab
  •  Standard control pattern changer

PC30MR-5 Specifications


Model Komatsu 3D88E-7*
Type Water-cooled, direct injection
Number of cylinders    3
Bore 88 mm 3.46"
Stroke 90 mm
Piston displacement 1.642 ltr
100.2 in³
SAE J1995 - Gross 18.2 kW 24.4 HP
ISO 9249 / SAE J1349 - Net 18.2 kW 24.4 HP
Rated rpm

Fan drive method for radiator cooling   Mechanical
*EPA Tier 4 Final emissions certified    


Number of selectable
working modes
Main pumps:
Pumps for
  Boom, arm, bucket, and travel circuits
  Variable displacement piston x 2
Maximum flow
32 ltr/min
18.3 gal/min
Pumps for
  Swing and blade
  Gear x 2
Swing pump maximum flow
18.7 ltr/min
4.9 gal/min
Swing pressure maximum
20.1 MPa
2,915 psi
Blade pump maximum flow
9.9 ltr/min
2.61 gal/min
Blade pressure maximum
21.5 MPa
3,118 psi
Max auxiliary flow rate
at 20.5 MPa / 2,973 psi
50 Lpm
13.2 gpm
Hydraulic valve
  8 spool
Operating method

Hydraulic assist
Travel motor:
  Variable displacement piston x 2
(with counterbalance valve and travel shaft brake)
Swing motor:
Fixed displacement piston type x 1
(with brake valve and swing shaft brake)
Hydraulic cylinders:
(number of cylinders)

bore x stroke x rod diameter
Boom (1)

80 mm x 550 mm x 45 mm
3.14" x 21.6" x 1.77"
Arm (1)

75 mm x 595 mm x 45 mm
2.9" x 23.4" x 1.77"
Bucket (1)

65 mm x 490 mm x 40 mm
2.55" x 19.29" x 1.57"
Boom swing (1)

80 mm x 500 mm x 40 mm
3.14" x 19.6" x 1.57"
Blade (1)

85 mm x 135 mm x 45 mm
3.34" x 5.11" x 1.77"

Drives and Brakes

Steering control
  Two levers with pedals
Drive method   Hydrostatic
Gradeability   30°
Maximum travel speed (rubber):

High 4.6 km/h 2.85 mph
Low 2.6 km/h 1.61 mph
Service brake   Hydraulic lock
Parking brake   Mechanical disc
Maximum drawbar pull 33 kN 3400 kgf 7,495 lbf


Center frame X-frame
Track frame Box-section
Track type Sealed
Track adjuster Greased gun
Number of carrier rollers (each side) 1
Number of track rollers (each side) 4

Coolant & Lubricant Capacity (refilling)

Engine 6.7 ltr 1.77 U.S. gal
Hydraulic system 20 ltr 5.3 U.S. gal
Cooling system 3.3 ltr 0.87 U.S. gal
Fuel tank 41 ltr
10.8 U.S. gal
Final drive (each side) 0.6 ltr
0.15 U.S. gal

Operating Weight (approximate)

With ROPS Canopy, Rubber Shoe
Operating Weight
2950 kg 6,505 lb
Ground Pressure
26.7 kPa 3.87 psi
With ROPS Cab, Rubber Shoe

Operating Weight
3100 kg 6,836 lb
Ground Pressure 28 kPa 4.06 psi


Width x height 1550 mm x 355 mm 5'1" x 1'2"



  • Air cleaner, double element with auto dust evacuator
  • Cooling fan, suction type


  • Alternator, 12 V/55 A
  • Auto-decelerator
  • Battery, 1 x 12 V/58 Ah
  • Front travel light
  • Starting motor 12 V/1.7 kW
  • Working light on boom


  • Auxiliary hydraulics with one-way/two-way flow selector valve
  • Foot control for auxiliary hydraulics
  • ISO/SAE pattern change valve


  • Fan guard
  • Thermal guard


  • Shoe, 300 mm12" rubber shoe


  • 12 V x 1 power supply
  • Automatic two-speed travel control
  • High resolution 3.5” LCD color monitor
  • Lock lever auto lock function
  • Rear view mirrors (RH, LH) 
  • Retractable seat belt, 78 mm
  • Suspension seat
  • Travel alarm
  • Two-post ROPS (ISO 3471) canopy


  • Arms — 1240 mm 48.8" arm assembly with piping
  • Backfill blade
  • Booms — 2285 mm 90" boom assembly with piping


  • Auto idle shutdown
  • Quick release buttery terminal (-)
  • Swing holding brake
  • Counterweight — 265 kg



  • Road Liner track, 300 mm 12"


  • Cab with A/C, radio ready, auxiliary input (3.5 mm jack) read
  • Proportional joysticks


  • Buckets
    — 300 mm
    12" HD bucket
    — 457 mm
    18" HD bucket

    — 610 mm
    24" HD bucket
  • Hydraulic thumb
  • Mechanical quick coupler