Mini-excavator PC55MR-5

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Overview
Komatsu small excavators feature advanced technology for maximum efficiency, improved productivity, and lower fuel consumption. They offer reliable performance, excellent forward visibility, and a comfortable operator workspace. Experience power, precision, and comfort with this model.

Key summary

• Horsepower (HP): 38 HP @ 2,400 rpm
• Horsepower (kW): 28.3 kW @ 2,400 rpm
• Operating weight (kg): 5 150 - 5 270
• Operating weight (lbs): 11,354 - 11,618
• Bucket capacity (m3): 0.055 - 0.18
• Bucket capacity (yd3): 0.07 - 0.24

Hydraulics

• HydrauMind Type: HydrauMind (Hydraulic Mechanical Intelligence New Design) system
• Number of selectable working modes: 2
• Main pump: Pumps for swing and blade
• Variable Type: Variable displacement, axial piston
• Maximum flow: 153.3 L/min (40.1 US gpm)
• Swing pump maximum flow: 63 L/min (16.6 US gpm)
• Gear Type: Fixed displacement gear (auxiliary)
• Main pumps for: Boom, arm, bucket, and travel circuits
• Relief valve settings: Implement circuits 26.5 MPa (3,844 psi), Travel circuit 26.5 MPa (3,844 psi), Swing circuit 21.6 MPa (3,133 psi), Pilot circuit 3.14 MPa (455 psi)

Hydraulic cylinders

• Boom (mm): 90 x 691 x 50
• Arm (mm): 85 x 733 x 55
• Bucket (mm): 75 x 580 x 50
• Boom (in): 3.54 x 27.2 x 1.97
• Arm (in): 3.35 x 28.9 x 2.17
• Bucket (in): 2.95 x 22.8 x 1.97
• Blade (mm): 110 x 140 x 50
• Boom swing (mm): 95 x 630 x 50

Hydraulic motors

• Travel: 2 x axial piston motor with parking brake
• Swing: 1 x axial piston motor with swing holding brake

Drives and Brakes

• Drive method type: Hydrostatic
• Maximum drawbar pull: 4 280 kgf (9,436 lbs)
• Service brake type: Hydraulic lock
• Parking brake: Mechanical brake
• Gradeability: 30°
• Max digging force: 3 980 kgf (8,768 lbf)
• Maximum travel speed: High 4.6 kph (2.9 mph), Low 2.6 kph (1.6 mph)

Swing system

• Swing reduction: Planetary gear
• Holding brake / Swing lock: Mechanical disc brake
• Swing speed: 9 rpm

Operating weight (approximate)

• Operating weight including one-piece 2 900 mm (9 ft 6 in) boom, 1 640 mm (5 ft 5 in) arm, SAE heaped bucket, blade, rated capacity of lubricants, coolant, full fuel tank, operator, and standard equipment.
• Shoes size: 400 mm (16 in)
• Ground pressure (ROPS cab, rubber shoe): 0.3 kg/cm² (29.6 kPa / 4.27 psi)
• Operating weight with ROPS cab, rubber shoe: 5 270 kg (11,618 lbs)
• Operating weight with ROPS canopy, rubber shoe: 5 150 kg (11,354 lbs)

Engine

• Engine model: Komatsu 4D88E-7*
• Cooling Type: Water-cooled, 4-cycle, direct injection, cooled EGR
• Aspiration: Naturally aspirated
• Number of cylinders: 4
• Bore x Stroke: 88 mm x 90 mm (3.46 in x 3.54 in)
• Piston displacement: 2.19 L (134 in³)
• Engine rated speed: 2,400 rpm
• Governor: All-speed control, electronic
• Fan drive method for radiator cooling: Mechanical
• Horsepower (SAE J1995 gross): 39 HP (29.1 kW)
• Horsepower (ISO 9249 / SAE J1349 net): 38 HP (28.3 kW)

Coolant and lubricant capacity (refilling)

• Fuel tank: 65 L (17.2 US gal)
• Engine oil: 8.1 L (7.5 L listed in parentheses for another ref) (2.2 US gal / 2.0 US gal shown as alternate)
• Coolant: 8.9 L (2.4 US gal)
• Final drive: 0.7 L (0.2 US gal)
• Hydraulic tank: 55 L (20 L) (14.5 US gal with alternate 5.3 US gal shown)

Undercarriage

• Center frame: X-frame
• Track frame: Box-section
• Track adjuster: Hydraulic
• Number of shoes (each side): 39
• Number of carrier rollers (each side): 1
• Number of track rollers (each side): 4
• Seal of track: Sealed

Standard equipment (selection)

• Air cleaner, double element with auto dust evacuator
• Cooling fan, suction type
• Side by side cooling package
• Alternator 12 V / 55 A
• Auto deceleration
• Battery 1 x 12 V / 72 Ah
• Starting motor 12 V / 2.3 kW
• Working lights on boom and on cab/canopy
• Auxiliary hydraulics with selector valve
• Fan guard structure and thermal guard
• 16" (400 mm) rubber shoes
• 12 V power supply
• Automatic two-speed travel control
• Foot operated auxiliary & 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 and travel lamp
• Two-post ROPS canopy
• Arm 2 640 mm (5'5") assembly with piping; Boom 2 900 mm (9'6") assembly with piping; Backfill blade
• Auto idle shutdown; KOMTRAX® Level 5 - cellular based; Swing holding brake

Optional equipment (selection)

• Road Liner track (400 mm / 16")
• Steel track (400 mm / 16")
• Cab with hinged door, air conditioning, radio ready, auxiliary input (3.5 mm jack)
• Proportional control joysticks
• Angle dozer blade
• Wide variety of attachments

Resources and notes

• Brochure available for related models (manufacturer literature referenced).
• Specification values shown are as provided by the manufacturer; multiple units (metric and imperial) are listed where available.

caractéristiques / spécifications techniques

• Model: PC55MR-5
• Brand: Komatsu
• Engine: Komatsu 4D88E-7, 4-cylinder, 2.19 L, 2,400 rpm
• Power: 38 HP (28.3 kW) @ 2,400 rpm
• Operating weight: 5 150 - 5 270 kg (11,354 - 11,618 lbs)
• Bucket capacity: 0.055 - 0.18 m3 (0.07 - 0.24 yd3)
• Fuel tank: 65 L (17.2 US gal)
• Hydraulic system: HydrauMind, variable displacement axial piston pumps, max flow 153.3 L/min
• Travel/drive: Hydrostatic; max drawbar pull 4 280 kgf (9,436 lbs); max travel speed 4.6 kph (2.9 mph)
• Undercarriage: X-frame, box-section track frame, hydraulic track adjuster, 39 shoes per side
• Standard features: KOMTRAX® Level 5, monitor panel 3.5" color display, ROPS canopy (or ROPS cab option), auxiliary hydraulics