Performance and versatility in a compact hydraulic excavator
Models include: PC30MR-5/PC35MR-5/PC45MR-5/PC55MR-5
| 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
| 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 |
| 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 |
| 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 |
| 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 |
| 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 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 |