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Excavators
PC78UU-11
Small excavators
- Operating weight (kg) 8480
- Operating weight (lbs) 18704
- Bucket capacity (m^3) 0.28
- Bucket capacity (yd^3) 0.37
- Engine power (HP) 68
- Engine power (kW) 51
Designed to excel in underground utility and general construction in urban environments, the new Komatsu PC78UU-11 short tail swing excavator is at home in confined spaces. Extremely transportable, it delivers high attachment flow with in-cab programmable flow rates for a wide range of attachments. It incorporates features of bigger Komatsu excavators, with key components designed and manufactured by Komatsu to work together in an integrated package. And it’s standard with our Komtrax remote monitoring and location system, backed by our Australia-wide service and support network.
Resources
Features and benefits
KomVision
The surroundings of the machine can be displayed on the monitor by using 3 cameras installed at the sides and rear of the machine. Press the switch F4 to select the image of the right, left and rear side view of the machine.
Offset boom
Equipped with an offset boom with maximum boom range of 1050mm on both sides. Now it is possible to accurately and efficiently perform the side excavation work in narrow areas and walls together with the rear ultra-small turning.
Environmentally-friendly and economical
The newly developed 2.4-liter high-output engine and vehicle control improve work efficiency while achieving low fuel consumption.
Specifications
- Full specs
- HydrauMind Type: HydrauMind System (Hydraulic Mechanical Intelligence NewDesign) system, closed-center system with load sensingvalves and pressure compensated valves
- Boom offset (mm): 1-110 x 350 x 55
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Main pump
- Pumps for: Boom, arm, bucket, swing and travel circuits
- Maximum flow (US gpm): 44.37
- Maximum flow (L/min): 168
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Relief valve setting
- Travel: 2 x axial piston motor with parking brake
- Swing: 1 x axial piston motor with swing holding brake
- Implement circuits (psi): 3841.29
- Travel circuit (psi): 3909
- Swing circuit (psi): 2987
- Implement circuits (MPa): 26.48
- Implement circuits (kgf/cm^2): 270
- Blade circuit (kgf/cm^2): 215
- Blade circuit (MPa): 21.1
- Pilot circuit (kgf/cm^2): 33
- Swing circuit (kgf/cm^2): 210
- Swing circuit (MPa): 20.6
- Travel circuit (kgf/cm^2): 275
- Travel circuit (MPa): 27
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Hydraulic cylinders
- Arm (Number of cylinders – bore x stroke x rod diameter)(mm): 1-110 x 715 x 65
- Arm (Number of cylinders – bore x stroke x rod diameter)(in): 4.33 x 28.15 x 2.56
- Blade (1)(in): 5.12 x 5.12 x 2.56
- Blade (1)(mm): 130 x 130 x 65
- Maximum drawbar pull (kgf): 6950
- Parking brake: Mechanical disc brake
- Gradeability: 70%, 35°
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Maximum travel speed
- High (mph): 3.11
- High (kph): 5
- Low (kph): 2.7
- Low (mph): 1.68
- Drive method: Hydrostatic
- Swing reduction: Planetary gear
- Swing circle lubrication: Grease-bathed
- Service brake: Hydraulic lock
- Holding brake/Swing lock: Mechanical disc brake
- Swing speed (rpm): 10
- Driven by: Hydrostatic
- Engine Model: Komatsu SAA3D95E-1
- Aspiration: Variable flow turbocharged, aftercooled, cooled EGR
- Piston displacement (L): 2.45
- Piston displacement (in^3): 149.51
- Governor: All-speed control, electronic
- Fan drive method for radiator cooling: Mechanical
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Horsepower
- SAEJ1995 - Gross (HP): 68
- SAEJ1995 - Gross (kW): 50.7
- ISO 9249 / SAE J1349 - Net (HP): 67.8
- ISO 9249 / SAE J1349 - Net (kW): 50.6
- Fan at maximum speed - Net (HP): 64.8
- Fan at maximum speed - Net (kW): 48.4
- Fuel tank (L): 125
- Engine (L): 10.5
- Engine (US gal): 2.77
- Coolant (L): 16
- Coolant (US gal): 4.23
- Swing drive (L): 2
- Swing drive (US gal): 0.53
- Hydraulic tank (US gal): 14.79
- Hydraulic tank (L): 56
- 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): 5
Tier 4 engine KDPF regeneration
As the technology of diesel engines has progressed from Tier 3 to Tier 4 Final, design aspects of the engines have been fine-tuned to comply with regulations to cover regulated diesel engine exhaust pollutants.
The result is that these new diesel engines are cleaner than ever before, and in many cases more fuel efficient too. Along with this comes the need to properly manage and maintain these new generation of machines to make sure that operating costs are minimised.
