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Excavators
PC78US-11
Small excavators
- Horsepower (HP) 68 HP @ 1,850 rpm
- Horsepower (kW) 51 kW @ 1 850 rpm
- Operating weight (kg) 7 910 - 8 250
- Operating weight (lbs) 17,438 - 18,188
- Bucket Capacity (m^3) 0.09 - 0.20
- Bucket Capacity (yd^3) 0.12 - 0.26
When you need compact versatility
Designed to excel in underground utility and general construction in urban environments, this new Komatsu 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.
- Compact design works in confined areas
- Accepts a wide range of attachments
- Easy to transport
- Uses up to 13% less fuel than prior model
Features and benefits
Compact design
For working in tight areas, a compact short tail swing offers maneuverability in more confined areas than a conventional excavator, such as in a single lane of traffic. The conventional boom design has a greater raising angle to reduce the front bucket swing radius.
Fast cycles and custom modes
Faster boom up/swing speed, combined with responsive quick arm speed, makes excavating and leveling work easier and more efficient over previous models. Six working modes let you tailor the machine to the tasks required, whether it be for performance or fuel savings.
Versatility and efficiency come standard
Standard high flow auxiliary hydraulics with proportional joysticks allows you incredible job versatility while providing precise attachment control. Standard grading blade with new moldboard profile improves backfilling and light grading efficiency over previous models.
Maximum operator comfort
Operators work comfortably in a quiet, climate-controlled cab featuring air suspension seat, Bluetooth radio, and high-resolution monitor with rearview camera. LED lights provide excellent vision at night. Sliding cab door makes entry and exit easier in confined spaces.
Fuel efficient, low-cost power
The new high-efficiency power package and viscous fan clutch work together to lower overall fuel consumption up to 13%*. A smart, simplified catalytic system removes soot without a diesel particulate filter, meaning lower cost of ownership and less maintenance.
Quick and easy maintenance
Periodic maintenance is more accessible and efficient with large service access doors and grouped service points with ground-level access.
Specifications
- Full specs
- Standard equipment
- Optional equipment
- HydrauMind Type: HydrauMind (Hydraulic Mechanical Intelligence New Design) system, closed-center system with load-sensing valves and pressure-compensated valves
- Number of selectable working modes: 6
-
Main pump
- Pumps for: Blade
- Variable Type: Variable displacement, axial piston
- Maximum flow (US gpm): 44.4
- Maximum flow (L/min): 168
- Gear Type: Fixed displacement gear
- Main pumps for: Boom, arm, bucket, and travel circuits
-
Auxiliary hydraulics (two-stage relief)
- One-way (gpm): 21.1
- One-way (L/min): 80
- Relief (MPa): 26.51
- Relief (psi): 3,830
- Relief in breaker mode (psi): 2,490
- Relief in breaker mode (MPa): 17.17
- Two-way (gpm): 36.5
- Two-way (L/min): 138
-
Relief valve setting
- Blade circuit (lower)(MPa): 21.1
- Implement circuits (psi): 4,264
- Travel circuit (psi): 4,337
- Swing circuit (psi): 3,176
- Implement circuits (MPa): 29.4
- Pilot circuit (psi): 464
- Implement circuits (kgf/cm^2): 300
- Blade circuit (lower)(psi): 3,060
- Blade circuit (lower)(kgf/cm^2): 215
- Blade circuit (raise)(psi): 1,784
- Pilot circuit (kgf/cm^2): 33
- Pilot circuit (MPa): 3.2
- Swing circuit (kgf/cm^2): 223
- Swing circuit (MPa): 21.9
- Travel circuit (kgf/cm^2): 305
- Travel circuit (MPa): 29.9
-
Hydraulic cylinders
- Boom (Number of cylinders – bore x stroke x rod diameter)(mm): 110 x 858 x 65
- Boom (Number of cylinders – bore x stroke x rod diameter)(in): 4.33 x 33.8 x 2.56
- Arm (Number of cylinders – bore x stroke x rod diameter)(mm): 95 x 861 x 60
- Arm (Number of cylinders – bore x stroke x rod diameter)(in): 3.74 x 33.9 x 2.36
- Bucket (Number of cylinders – bore x stroke x rod diameter)(mm): 85 x 710 x 55
- Bucket (Number of cylinders – bore x stroke x rod diameter)(in): 3.35 x 27.95 x 2.17
- Blade (1)(in): 5.12 x 5.12 x 2.56
- Blade (1)(mm): 130 x 130 x 65
-
Hydraulic motors
- Travel: 2 x piston motor with parking brake
- Swing: 1 x axial piston motor with swing holding brake; driven by hydraulic motor, swing lock: mechanical disc brake
- Maximum drawbar pull (kgf): 6 820
- Maximum drawbar pull (lbs): 15,309
- Service brake type: Hydraulic lock
- Parking brake: Mechanical brake
- Drive method for drives and brakes: Hydrostatic
-
Maximum travel speed
- High (mph): 3.1
- High (kph): 5
- Low (kph): 2.7
- Low (mph): 1.9
- Swing reduction: Planetary gear
- Swing circle lubrication: Grease-bathed
- Holding brake/Swing lock: Mechanical disc brake
- Swing speed (rpm): 10
- Operating weight features (ft): Operating weight includes 12 ft. 2 in one-piece boom, 7 ft. 5 in arm, ISO 7451 heaped 0.26 yd3 bucket, blade, rated capacity of lubricants, coolant, full fuel tank, operator, and standard equipment.
- Operating weight features (mm): Operating weight includes 3 710 mm one-piece boom, 2 250 mm arm, ISO 7451 heaped 0.20 m3 bucket, blade, rated capacity of lubricants, coolant, full fuel tank, operator, and standard equipment.
-
Operating weight
- Operating weight with road liner 18" (lbs): 17,791
- Operating weight with road liner 450 mm (kg): 8 070
- Operating weight with rubber shoe 450 mm (kg): 7 910
- Operating weight with rubber shoe 18 in (lbs): 17,438
- Operating weight with triple grouser 450 mm (kg): 7 930
- Operating weight with triple grouser 18 in (lbs): 17,483
- Operating weight with triple grouser 600 mm (kg): 8 250
- Operating weight with triple grouser 24 in (lbs): 18,188
-
Ground pressure
- Ground pressure with triple grouser 450 mm (kPa): 35.8
- Ground pressure with road liner 18 in (psi): 5.2
- Ground pressure with Rubber shoe 18" (psi): 5.2
- Ground pressure with triple grouser 600 mm (kg/cm^2): 0.27
- Ground pressure with triple grouser 18 in (psi): 5.2
- Ground pressure with triple grouser 600 mm (kPa): 26.8
- Ground pressure with triple grouser 24" (psi): 5.2
- Ground pressure with road liner 450 mm (kg/cm^2): 0.36
- Ground pressure with road liner 450 mm (kPa): 35.8
- Ground pressure with rubber shoe 450 mm (kg/cm^2): 0.35
- Ground pressure with rubber shoe 450 mm (kPa): 35
- Ground pressure with triple grouser 450 mm (kg/cm^2): 0.36
- Engine Model: Komatsu SAA3D95E-1*
- Cooling Type: Water-cooled, 4-cycle, direct injection
- Aspiration: Turbocharged, aftercooled, cooled EGR
- Number of cylinders: 3
- Bore (mm): 95
- Bore (in): 3.74
- Stroke (in): 4.52
- Stroke (mm): 115
- Piston displacement (L): 2.45
- Piston displacement (in^3): 149.5
- Engine Rated (rpm): 1,850
- Governor: All-speed control, electronic
- Fan drive method for radiator cooling: Mechanical with viscous fan clutch
-
Horsepower
- SAEJ1995 - Gross (HP): 68
- SAEJ1995 - Gross (kW): 50.7
- ISO 9249 / SAE J1349 - Net (HP): 67.9
- ISO 9249 / SAE J1349 - Net (kW): 50.7
- Fuel tank (US gal): 33
- Engine (US gal): 2.7
- Final drive (US gal): 0.29
- Swing drive (L): 2
- Swing drive (US gal): 0.52
- Hydraulic tank (US gal): 14.8
- Hydraulic tank (L): 56
- Radiator (L): 18
- Radiator (US gal): 4.8
- Fuel tank (L): 125
- Engine (L): 18
- Final drive (L): 1.1
- Center frame: X-frame leg
- 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
- Seal of track: Sealed
- Komatsu SAA3D95E-1
- Auto deceleration
- Air cleaner, double element with auto dust evacuator
- B20 Biodiesel compatible*
- Cooling system viscous fan clutch, suction type
- Cooling system with expansion tank
- Engine oil-pan drain valve
- Fixed turbocharger
- Komatsu Diesel Oxidation Catalyst (KDOC)
- Alternator, 24 V/60 A
- Batteries, 2 x 12 V/55 Ah
- Battery disconnect switch
- Lock out/tag out provisioned
- Starting motor 24 V/4.5 kW
- Fan guard
- Pump/Engine partition cover
- Diesel ground level fuel fill and hydraulic tank fill cap are under lockable side covers
- Car Body swivel guards
- 12 V x 2 power supply
- Attachment flow switching through monitor
- Auto climate control
- Auto idle shutdown
- Cab includes: antenna, multifunction audio with USB and Bluetooth wireless technology, floormat,intermittent front windshield wiper and washer, large ceiling hatch, pull-up front window, removable lower windshield
- Handrails
- Komtrax 5.0 (cellular 4G system)
- LED working light on boom
- LED working light on Cab
- Lock lever auto lock function
- Monitor panel
- Operator identification function
- Rearview mirrors (LH, rear)
- Rearview monitoring system
- ROPS Cab (ISO 12117-2)
- Seat belt, 3.1"
- Suspension seat
- Swing holding brake
- Travel alarm
- Travel Hi/Lo switch on blade control lever
- Dual stage relief valve
- Proportional control on floor for auxiliary hydraulics
- Hydraulic control unit-1 additional actuator
- One-way/two-way auxiliary hydraulic flow
- Operation pattern change-over valve (two-way, ISO/BH)
- One-variable piston pump and one gear pump
- Auxiliary circuit return filter and accumulator
- Automatic swing brake
- Automatic load sensing two speed travel
- Blade 7'7" (welded cutting edge type)
- Counterweight, 1,775 lbs.
- Triple grouser shoe, 18"
- Komatsu SAA3D95E-1
- Auto deceleration
- Air cleaner, double element with auto dust evacuator
- B20 Biodiesel compatible*
- Cooling system viscous fan clutch, suction type
- Cooling system with expansion tank
- Engine oil-pan drain valve
- Fixed turbocharger
- Komatsu Diesel Oxidation Catalyst (KDOC)
- Alternator, 24 V/60 A
- Batteries, 2 x 12 V/55 Ah
- Battery disconnect switch
- Lock out/tag out provisioned
- Starting motor 24 V/4.5 kW
- Fan guard
- Pump/Engine partition cover
- Diesel ground level fuel fill and hydraulic tank fill cap are under lockable side covers
- Car Body swivel guards
- 12 V x 2 power supply
- Attachment flow switching through monitor
- Auto climate control
- Auto idle shutdown
- Cab includes: antenna, multifunction audio with USB and Bluetooth wireless technology, floormat,intermittent front windshield wiper and washer, large ceiling hatch, pull-up front window, removable lower windshield
- Handrails
- Komtrax 5.0 (cellular 4G system)
- LED working light on boom
- LED working light on Cab
- Lock lever auto lock function
- Monitor panel
- Operator identification function
- Rearview mirrors (LH, rear)
- Rearview monitoring system
- ROPS Cab (ISO 12117-2)
- Seat belt, 78 mm
- Suspension seat
- Swing holding brake
- Travel alarm
- Travel Hi/Lo switch on blade control lever
- Dual stage relief valve
- Proportional control on floor for auxiliary hydraulics
- Hydraulic control unit-1 additional actuator
- One-way/two-way auxiliary hydraulic flow
- Operation pattern change-over valve (two-way, ISO/BH)
- One-variable piston pump and one gear pump
- Auxiliary circuit return filter and accumulator
- Automatic swing brake
- Automatic load sensing two speed travel
- Blade 2330 mm (welded cutting edge type)
- Counterweight, 805 kg
- Triple grouser shoe, 450 mm
Guards and covers
- Bolt-on top guard (operator protective guards level 2)
- Cab front guard- Full height front window mesh guard (Level 1)
Work equipment
- Boom,- 11'2" swing type
- Arm,- 6'11" arm assembly with provision for hydraulic thumb
- Blade,- 8' 1" wide blade (requires 24" shoes)
Undercarriage
- Shoes:- 18" Road Liner shoes- 24" Triple grouser shoes
- Rubber belt track- 18"
Guards and covers
- Bolt-on top guard (operator protective guards level 2)
- Cab front guard- Full height front window mesh guard (Level 1)
Work equipment
- Boom,- 3405 mm swing type
- Arm,- 2100 mm arm assembly with provision for hydraulic thumb
- Blade,- 2470 mm wide blade (requires 600 mm shoes)
Undercarriage
- Shoes:- 450 mm Road Liner shoes- 600 mm Triple grouser shoes
- Rubber belt track- 450 mm
Support you can count on
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