Komatsu Excavators PC1250-8

PC1250-8 Hydraulic Excavator

The PC1250-8, equipped with a short boom and stick is a mass excavator that will make top loading mass amounts of over-burden a fast and efficient process. In addition, power, economy, heavy lift and swing priority work modes allow the operator to operate his machine in the most efficient manner for his current work. Two boom mode settings and shockless boom control make operation smoother and more productive.

Engine
EPA Tier 3 and EU stage 3A emission certified.
Model		Komatsu SAA6D170E-5
Type		4-cycle, water-cooled, direct injection
Aspiration		Turbocharged, aftercooled, cooled EGR
Number of cylinders		6
Bore	6.69"	170 mm
Stroke	6.69"	170 mm
Piston displacement	1,413 in³	23.15 ltr
Governor		All-speed, electronic
Horsepower:
SAE J1995 (Gross)	688 HP	514 kW
ISO 9249 / SAE J1349 - Net	672 HP	502 kW
Hydraulic fan at maximum speed (Net)	620 HP	463 kW
Rated rpm		1800 rpm
Fan drive type		Hydraulic, variable speed, reversible
EPA Tier 3 and EU stage 3A emission certified.

Hydraulics System
Type		Open-center load sensing system
Number of selectable working modes		2
Main pump:
Type		Variable capacity piston pumps
Pumps for		Boom, arm, bucket, swing, and travel circuits
Maximum flow
For implement and travel	2 x 130.5 U.S. gpm	2 x 494 ltr/min
For swing	1 x 158.5 U.S. gpm	1 x 600 ltr/min
Sub-pump for control circuit		Gear pump
Hydraulic motors:
Travel		2 x axial piston motors with parking brake
Swing		2 x axial piston motors with swing holding brake
Relief valve setting:
Implement circuits	4,550 psi	31.4 MPa 320 kg/cm²
Travel circuit	4,980 psi	34.3 MPa 350 kg/cm²
Swing circuit	3,910 psi	27.0 MPa 275 kg/cm²
Pilot circuit	430 psi	2.9 MPa 30 kg/cm²
Hydraulic cylinders:
Cylinder / Number of cylinders	Bore x Stroke	Bore x Stroke
Backhoe
Boom / 2	8.9" x 94.1"	225 mm x 2390 mm
Arm / 1	9.8" x 95.9"	250 mm x 2435 mm
Bucket:
Std / 2	6.3" x 71.8"	160 mm x 1825 mm
SP / 2	6.3" x 76.8"	160 mm x 1950 mm

Swing System
Driven method		2 x Hydraulic motor
Swing reduction		Planetary gear
Swing circle lubrication		Grease-bathed
Swing lock		Oil disc brake
Swing speed		5.5 rpm

Drives & Brakes
Steering control		Two levers with pedals
Drive method		Fully hydrostatic
Travel motor		Axial piston motor, in-shoe design
Reduction system		Planetary double reduction
Maximum drawbar pull	154,320 lb	686 kN 70000 kg
Gradeability		70%
Maximum travel speed:
High	2.0 mph	3.2 km/h
Low	1.3 mph	2.1 km/h
Service brake		Hydraulic lock

Undercarriage
Center frame		H-leg frame
Track frame		Box-section
Track type		Sealed
Track adjuster		Hydraulic
No. of shoes:
Standard, SP, Shovel		48 each side
LC		55 each side
No. of carrier rollers		3 each side
No. of track rollers:
Standard, SP, Shovel		8 each side
LC		10 each side

Coolant and Lubricant Capacity (refilling)
Fuel tank	359.3 US gal	1360 ltr
Radiator	37.5 US gal	142 ltr
Engine	22.7 US gal	86 ltr
Final drive, each side	5.5 US gal	21 ltr
Swing drive	2 x 6.4 US gal	2 x 24.5 ltr
Hydraulic tank	177.0 US gal	670 ltr
PTO	3.6 US gal	13.5 ltr