Small excavator

PC45MR-5

  • Horsepower 28.3 kW @ 2 400 rpm 38 HP @ 2,400 rpm
  • Operating weight 4 870 - 4 990 kg 10,737 - 11,001 lbs.
  • Bucket capacity 0.055 - 0.16 m³ 0.07 - 0.21 yd³

Specifications for PC45MR-5

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US system Metric
Engine
Model Komatsu 4D88E-7*
Type Water-cooled, 4-cycle, direct injection, cooled EGR
Aspiration
Naturally aspirated
Number of cylinders
4
Bore
88 mm
Stroke
90 mm
Piston displacement 2.19 L
Horsepower:
SAE J1995 - Gross 29.1 kW
ISO 9249 / SAE J1349 - Net 28.3 kW
Rated rpm
2 400
Fan drive method for radiator cooling
Mechanical
Governor
All-speed control, electronic

*EPA Tier 4 Final emissions certified


Model Komatsu 4D88E-7*
Type Water-cooled, 4-cycle, direct injection, cooled EGR
Aspiration
Naturally aspirated
Number of cylinders
4
Bore
3.46 in
Stroke
3.54 in
Piston displacement 134 in³
Horsepower:
SAE J1995 - Gross 39 HP
ISO 9249 / SAE J1349 - Net 38 HP
Rated rpm
2,400
Fan drive method for radiator cooling
Mechanical
Governor
All-speed control, electronic

*EPA Tier 4 Final emissions certified


Hydraulics
Type HydrauMind (Hydraulic Mechanical
Intelligence New Design) system
Number of selectable working modes
2
Main pumps:
Pumps for
Boom, arm, bucket, and travel circuits
Type Variable displacement, axial piston
Maximum flow 153.3 L/min
Pumps for
Swing and blade
Type
Fixed displacement gear
Maximum flow
63 L/min
Hydraulic motors:
Travel 2 x axial piston motor with parking brake
Swing 1 x axial piston motor with swing holding brake
Relief valve setting:
Implement circuits
26.5 MPa 270 kgf/cm²
Travel circuit
26.5 MPa 270 kgf/cm²
Swing circuit
21.6 MPa 220 kgf/cm²
Pilot circuit
3.14 MPa 32 kgf/cm²
Blade circuit (Raise, Lower)
21.6 MPa 220 kgf/cm²
Hydraulic cylinders:
(Number of cylinders – bore x stroke x rod diameter)
 
Boom / 1
90 x 691 x 50 mm
Arm/ 1
80 x 649 x 50 mm
Bucket / 1
70 x 580 x 45 mm
Boom swing / 1
90 x 630 x 50 mm
Blade / 1
110 x 140 x 50 mm
Type HydrauMind (Hydraulic Mechanical
Intelligence New Design) system
Number of selectable working modes
2
Main pumps:
Pumps for
Boom, arm, bucket, and travel circuits
Type Variable displacement, axial piston
Maximum flow 40.1 gpm
Pumps for
Swing and blade
Type
Fixed displacement gear
Maximum flow
16.6 gpm
Hydraulic motors:
Travel 2 x axial piston motor with parking brake
Swing 1 x axial piston motor with swing holding brake
Relief valve setting:
Implement circuits
3,844 psi
Travel circuit
3,844 psi
Swing circuit
3,133 psi
Pilot circuit
455 psi
Blade circuit (Raise, Lower)
3,133 psi
Hydraulic cylinders:
(Number of cylinders – bore x stroke x rod diameter)
 
Boom / 1
3.54 x 27.2 x 1.97 in
Arm/ 1
3.14 x 25.6 x 1.97 in
Bucket / 1
2.76 x 22.8 x 1.77 in
Boom swing / 1
3.54 x 24.8 x 1.97 in
Blade / 1
4.33 x 5.5 x 1.97 in
Drives and Brakes
Steering control
Two levers with pedals
Drive method Hydrostatic
Maximum drawbar pull 42 kN 4 280 kgf
Gradeability 30°
Maximum travel speed:
(Auto-shift)

High
4.6 kph
Low
2.6 kph
Service brake
Hydraulic lock
Parking brake
Mechanical disc

Steering control
Two levers with pedals
Drive method Hydrostatic
Maximum drawbar pull 9,436 lbf.
Gradeability 30°
Maximum travel speed:
(Auto-shift)

High
2.9 mph
Low
1.6 mph
Service brake
Hydraulic lock
Parking brake
Mechanical disc

Swing System
Drive method Hydrostatic
Swing reduction
Planetary gear
Swing circle lubrication Grease-bathed
Swing brake Hydraulic lock
Swing lock Mechanical disc brake
Swing speed
9 rpm
Drive method Hydrostatic
Swing reduction
Planetary gear
Swing circle lubrication Grease-bathed
Swing brake Hydraulic lock
Swing lock Mechanical disc brake
Swing speed
9 rpm
Undercarriage
Center frame
X-frame
Track frame
Box-section
Track type
Sealed
Track adjuster
Hydraulic
Number of shoes (each side) 39
Number of carrier rollers (each side) 1
Number of track rollers (each side) 4
Center frame
X-frame
Track frame
Box-section
Track type
Sealed
Track adjuster
Hydraulic
Number of shoes (each side) 39
Number of carrier rollers (each side) 1
Number of track rollers (each side) 4
Coolant & Lubricant Capacity (Refilling)
Fuel tank 65 L
Coolant 8.9 L
Engine 8.1 (7.5) L
Final drive (each side) 0.7 L
Hydraulic tank 55 (20) L
Fuel tank 17.2 US gal
Coolant 2.4 US gal
Engine 2.2 (2.0) US gal
Final drive (each side) 0.2 US gal
Hydraulic tank 14.5 (5.3) US gal

Operating Weight (Approximate)

Operating weight including 2 640 mm one-piece boom, 1 695 mm arm, SAE heaped 0.14 m3 bucket, blade, rated capacity of lubricants, coolant, full fuel tank, operator, and standard equipment.

Shoes
400 mm
ROPS Canopy, Rubber Shoe
 
Operating Weight
4 870 kg
Ground Pressure
27.4 kPa  0.28 kg/cm2
ROPS Cab, Rubber Shoe

Operating Weight
4 990 kg
Ground Pressure 28.0 kPa  0.29 kg/cm2

Operating weight including 8 ft. 8 in one-piece boom, 5 ft. 7 in arm, SAE heaped 0.18 yd3 bucket, blade, rated capacity of lubricants, coolant, full fuel tank, operator, and standard equipment.

Shoes
16 in
ROPS Canopy, Rubber Shoe
 
Operating Weight
10,737 lbs.
Ground Pressure
3.98 psi
ROPS Cab, Rubber Shoe

Operating Weight
11,001 lbs.
Ground Pressure 4.12 psi

ENGINE

  • Air cleaner, double element with auto dust evacuator
  • Cooling fan, suction type
  • Side by side cooling package

ELECTRICAL SYSTEM

  • Alternator, 12 V/55 A
  • Auto deceleration
  • Battery, 1 x 12 V/72 Ah
  • Starting motor 12 V/2.3 kW
  • Working light on boom
  • Working light on cab or canopy

HYDRAULIC SYSTEM

  • Auxiliary hydraulics with selector valve

GUARDS AND COVERS

  • Fan guard structure
  • Thermal guard

UNDERCARRIAGE

  • Shoe, 400 mm rubber shoe

OPERATOR ENVIRONMENT

  • 12 V x 1 power supply
  • Automatic two-speed travel control
  • Foot operated auxiliary control
  • Foot operated swing boom control
  • Lock lever auto lock function
  • Monitor panel, 3.5" color display
  • Operator identification function
  • Rear view mirrors (RH, LH, rear)
  • Seat belt, 76 mm retractable
  • Suspension seat (mid height)
  • Travel alarm
  • Travel lamp
  • Two-post ROPS canopy

WORK EQUIPMENT

  • Arm — 1695 mm arm assembly with piping
  • Backfill blade
  • Boom — 2640 mm boom assembly with piping

OTHER EQUIPMENT

  • Auto idle shutdown
  • KOMTRAX® Level 5 - cellular based
  • Swing holding brake

ENGINE

  • Air cleaner, double element with auto dust evacuator
  • Cooling fan, suction type
  • Side by side cooling package

ELECTRICAL SYSTEM

  • Alternator, 12 V/55 A
  • Auto deceleration
  • Battery, 1 x 12 V/72 Ah
  • Starting motor 12 V/2.3 kW
  • Working light on boom
  • Working light on cab or canopy

HYDRAULIC SYSTEM

  • Auxiliary hydraulics with selector valve

GUARDS AND COVERS

  • Fan guard structure
  • Thermal guard

UNDERCARRIAGE

  • Shoe, 16" rubber shoe

OPERATOR ENVIRONMENT

  • 12 V x 1 power supply
  • Automatic two-speed travel control
  • Foot operated auxiliary control
  • Foot operated swing boom control
  • Lock lever auto lock function
  • Monitor panel, 3.5" color display
  • Operator identification function
  • Rear view mirrors (RH, LH, rear)
  • Seat belt, 3" retractable
  • Suspension seat (mid height)
  • Travel alarm
  • Travel lamp
  • Two-post ROPS canopy

WORK EQUIPMENT

  • Arm — 5'7" arm assembly with piping
  • Backfill blade
  • Boom — 8'8" boom assembly with piping

OTHER EQUIPMENT

  • Auto idle shutdown
  • KOMTRAX® Level 5 - cellular based
  • Swing holding brake

UNDERCARRIAGE

  • Road Liner track (400 mm)
  • Steel track (400 mm)

OPERATOR ENVIRONMENT

  • Cab with hinged door, air conditioner, radio ready, auxiliary input (3.5 mm jack) ready
  • Proportional Control Joysticks

WORK EQUIPMENT

  • Angle dozer blade
  • Wide variety of attachments

UNDERCARRIAGE

  • Road Liner track (16")
  • Steel track (16")

OPERATOR ENVIRONMENT

  • Cab with hinged door, air conditioner, radio ready, auxiliary input (3.5 mm jack) ready
  • Proportional Control Joysticks

WORK EQUIPMENT

  • Angle dozer blade
  • Wide variety of attachments
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