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Komatsu PC78US-10 SMALL EXCAVATORS

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

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Feature Parameter

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.

Parameter

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