Komatsu PC78US-10 SMALL EXCAVATORS

Komatsu PC78US-10 SMALL EXCAVATORS

BucketCapacityMax 0.44
BucketCapacityMin 0.12
Horsepower 65.5 @ 1950 rpm
OperatingWeightMax 17747
OperatingWeightMin 17747

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Increased productivity

The improved vehicle control contributes to increased productivity while maintaining low fuel consumption.

Maximum drawbar pull

up to 2% increase

Equipped with a Blade as Standard Equipment

A blade for efficient back-filling and leveling work is equipped as standard. The dedicated pump for the blade enables smooth dozing operation.

True Tight Tail Swing For Confined Areas

Short implement swing radius
12' 2" (3710 mm) boom raising angle of the PC78US-10 is larger than a conventional profile excavator. The result is reduced front implement swing radius.

100% "passive regeneration"

The new Komatsu Diesel Oxidation Catalyst (KDOC) has an integrated design that does not interfere with daily operation. This smart and simplified system removes soot using 100% "passive regeneration" without the need for a Diesel Particulate Filter. The KDOC is a simple design and does not have a scheduled service interval like a DPF and is designed for long life with no scheduled maintenance required. For owners, this means lower owning and operating costs due to less complexity and seamless operation.

Engine

Model
Komatsu SAA4D95LE-6*
Type
Water cooled, 4-cycle, direct injection
Aspiration
Variable flow, turbocharged, air-to-air aftercooled EGR
Number of cylinders
4
Bore
95 mm
3.74"
Stroke
115 mm
4.52"
Piston displacement 3.26 ltr 199 in³
Horsepower:    
SAE J1995 - Gross 50.7 kW 68 HP
ISO 9249 / SAE J1349 - Net 48.8 kW 65.5 HP
Rated rpm   1950
Governor    All-speed control, electronic
Lubrication system:  
Method   Gear pump, force-lubrication
Filter   Full-flow
Air cleaner   Air cleaner, double element and auto dust evacuator
*EPA Tier 4 Final emissions certified

Hydraulics

Type: HydrauMind (Hydraulic Mechanical Intelligence New Design) system, closed-center system with load sensing valve and pressure compensated valve

Drives & Brakes

Steering control Two levers with pedals
Drive method Fully hydrostatic
Maximum drawbar pull 68.2 kN 6950 kgf
15,489 lbf
Maximum travel speed:  
High 5 km/h
3.1 mph
Low 2.8 km/h
1.7 mph
Service brake Hydraulic lock
Parking brake Mechanical disc

Swing System

Driven by Hydraulic motor
Swing reduction Planetary gear
Swing circle lubrication Grease-bathed
Swing lock Mechanical disc brake
Swing speed 10 rpm

Undercarriage

Center frame X-frame leg
Track frame Box-section
Track type Sealed
Track adjuster Hydraulic
Number of carrier shoes (each side) 39
Number of carrier rollers (each side) 1
Number of track rollers (each side) 5

Coolant & Lubricant Capacity (refilling)

Fuel tank 125 ltr 33.0 u.s. gal
Radiator 13 ltr 3.43 u.s. gal
Engine 11.5 ltr 3.04 u.s. gal
Final drive, each side 1.1 ltr 0.29 u.s. gal
Swing drive 2.0 ltr 0.53 u.s. gal
Hydraulic tank 56 ltr 14.8 u.s. gal

Operating Weight

Operating weight includes 3710 mm 12'2" one-piece boom, 2250 mm 7'5" arm, SAE heaped 0.2 m3 0.26 yd3 bucket, rated capacity of lubricants, coolant, full fuel tank, operator, and standard equipment.

Model
Komatsu SAA4D95LE-6*
Type
Water cooled, 4-cycle, direct injection
Aspiration
Variable flow, turbocharged, air-to-air aftercooled EGR
Number of cylinders
4
Bore
95 mm
3.74"
Stroke
115 mm
4.52"
Piston displacement 3.26 ltr 199 in³
Horsepower:    
SAE J1995 - Gross 50.7 kW 68 HP
ISO 9249 / SAE J1349 - Net 48.8 kW 65.5 HP
Rated rpm   1950
Governor    All-speed control, electronic
Lubrication system:  
Method   Gear pump, force-lubrication
Filter   Full-flow
Air cleaner   Air cleaner, double element and auto dust evacuator
*EPA Tier 4 Final emissions certified


Main pumps:

Pumps for   Boom, arm, bucket, and travel circuits
Type
Variable capacity piston type, axial piston
Maximum flow 160 ltr/min 42.2 u.s. gal/min
Pumps for   Swing and blade
Type
Fixed displacement gear
Maximum flow 63 ltr/min 16.64 u.s. gal/min
Hydraulic motors:

Swing
1 x piston motor with swing holding brake
Relief valve setting:

Implement, travel circuit 26.5 MPa / 270 kgf/cm² 3,844 psi
Travel circuit 27.0 MPa 275 kgf/cm2 3,916 psi
Swing circuit 21.1 MPa / 215 kgf/cm² 3,060 psi
Blade circuit (Raise) 12.7 MPa / 130 kgf/cm² 1,842 psi
Blade circuit (Lower) 20.0 MPa / 210 kgf/cm² 2,900 psi
Hydraulic cylinders:
(Number of cylinders – bore x stroke x rod diameter)
   
Boom / 1 115 mm x 858 mm x 65 mm 4.53" x 33.8" x 2.56"
Arm / 1 100 mm x 861 mm x 60 mm 3.9" x 33.9" x 2.36"
Bucket / 1 90 mm x 710 mm x 55 mm 3.54" x 27.95" x 2.17"
Blade / 1 130 mm x 200 mm x 65 mm 5.12" x 7.87" x 2.56"

Steering control Two levers with pedals
Drive method Fully hydrostatic
Maximum drawbar pull 68.2 kN 6950 kgf
15,489 lbf
Maximum travel speed:  
High 5 km/h
3.1 mph
Low 2.8 km/h
1.7 mph
Service brake Hydraulic lock
Parking brake Mechanical disc

Driven by Hydraulic motor
Swing reduction Planetary gear
Swing circle lubrication Grease-bathed
Swing lock Mechanical disc brake
Swing speed 10 rpm

Center frame X-frame leg
Track frame Box-section
Track type Sealed
Track adjuster Hydraulic
Number of carrier shoes (each side) 39
Number of carrier rollers (each side) 1
Number of track rollers (each side) 5

Fuel tank 125 ltr 33.0 u.s. gal
Radiator 13 ltr 3.43 u.s. gal
Engine 11.5 ltr 3.04 u.s. gal
Final drive, each side 1.1 ltr 0.29 u.s. gal
Swing drive 2.0 ltr 0.53 u.s. gal
Hydraulic tank 56 ltr 14.8 u.s. gal

With Blade
Track Shoes Operating weight Ground Pressure
450 mm 18" 7910 kg
17,439 lb
34.9 kPa / 0.36 kg/cm2
5.06 psi
600 mm 24" 8080 kg
17,813 lb
26.7 kPa / 0.27 kg/cm2
3.87 psi
450 mm 18"
Road Liner
8050 kg
17,747 lb
35.1 kPa / 0.36 kg/cm2
5.09 psi

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