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KOMATSU - CRAWLER EXCAVATORS



KOMATSU PC120-6

Technical Data and Photos

Manufacturer: KOMATSU

Type: crawler hydraulic excavator

Model: PC120-6

OPERATING SPECIFICATIONS:
Operating weight: 12 030 kg (26,522 lb) - 12 490 kg (27,535 lb)
Bucket capacity: 0.34 m3 (0.44 yd3) - 0.70 m3 (0.92 yd3)
Maximum digging depth: 6 095 mm (20'0") - 6 620 mm (21'9")
Maximum travel speed: 5.0 km/h 3.1 mph
Standard shoe (width): 600 mm (24")


ENGINE:
Model: Komatsu SAA4D102E-2
Type: 4 cycle, water-cooled, direct-injection, diesel, Tier 2
Aspiration: turbocharged and air-air aftercooling
Flywheel horsepower (SAE J1349): 66.2 kW (89 HP) at 2200 rpm Number of cylinders: 4
Bore: 95 mm (3.74")
Stroke: 115 mm (4.53")
Displacement: 5.26 ltr (199 in3)
Governor: all-speed, mechanical


ELECTRICAL SYSTEM:
Starting motor: 1 x 24 V / 5.5 kW
Alternator: 25 A, 24 V Batteries, 2 x 160Ah / 12V


HYDRAULIC SYSTEM:
Type: HydrauMind (Hydraulic Mechanical Intelligence New Design) system, closed-center system with load sensing valves and pressure compensated valves
Number of selectable working modes: 5
Main pump:
Type: variable displacement piston pump
Pumps for: boom, arm, bucket, swing, and travel circuits
Maximum flow: 1 x 226.3 ltr (59.8 gpm/min)
Sub-pump for control circuit: gear pump
Hydraulic motors:
Travel: 2 x axial piston motor with parking brake
Swing: 1 x axial piston motor with swing holding brake
Relief valve setting:
Implement circuits: 325 kg/cm2 4,620 psi
Travel circuit: 355 kg/cm2 5,050 psi
Swing circuit: 275 kg/cm2 3,910 psi
Pilot circuit: 30 kg/cm2 430 psi
Service valve: 280 kg/cm2 3,983 PSI
Service valves maximum flow:
First valve: 226 ltr./min 59.7 gpm
Second valve: 113 ltr./min. 29.9 gpm
Third valve: 113 ltr./min. 29.9 gpm
Hydraulic cylinders:

Boom:
Number of cylinders: 2
Bore: 105 mm (4.1")
Stroke: 990 mm (39.0")

Arm:
Number of cylinders: 1
Bore: 115 mm (4.5")
Stroke: 1 175 mm (46.3")

Bucket:
Number of cylinders: 1
Bore: 95 mm (3.7")
Stroke: 885 mm (34.8")


OPERATING WEIGHT:
Operating weight, including 4600 mm 15'1" one-piece boom, 2500 mm 11'10" arm, SAE heaped 0.5 m3 0.65 yd3 back-hoe bucket, operator, lubricant, coolant, full fuel tank, and standard equipment.

Shoes: 500 mm (20")
Operating weight: 12 030 kg (26,522 lb)
Ground pressure: 39.2 kPa - 0.40 kg/cm2 - 5.69 psi

Shoes: 600 mm (24")
Operating weight: 12 220 kg (26,940 lb)
Ground pressure: 0.34 kg/cm2 - 4.83 psi

Shoes: 700 mm (28")
Operating weight: 12 400 kg (27,337 lb)
Ground pressure: 0.30 kg/cm2 - 4.27 psi

Shoes: 750 mm (30")
Operating weight: 12 490 kg (27,535 lb)
Ground pressure: 0.28 kg/cm2 - 3.98 psi


COUNTERWEIGHT:
Weight: 2 305 kg (5,081 lb)


DRIVES AND BRAKES:
Steering control: two levers with pedals
Drive method: hydrostatic
Travel motor: axial piston motor, in-shoe design
Reduction system: planetary gear, double reduction
Maximum drawbar pull: 10 200 kg 22,487 lb
Maximum travel speed:
High: 5.0 km/h 3.1 mph
Mid: 3.3 km/h 2.1 mph
Low: 2.5 km/h 1.6 mph
Service brake: hydraulic lock
Parking brake: oil disc brake


UNDERCARRIAGE:
Center frame: x-frame
Track frame: box-section
Seal of track: sealed track
Track adjuster: hydraulic
Number of shoes (each side): 42
Number of carrier rollers (each side): 1
Number of track rollers (each side): 7


DIMENSIONS
with shoe width 600 mm (24") and arm length 2.1 m (6'11"):

Shipping length: 7 590 mm (24'11")
Shipping height: 2 620 mm (8'7")
Overall width: 2 490 mm (8'2")
Width of crawler: 2 460 mm (8'1")
Overall height (to top of cab): 2 715 mm (8'11")
Ground clearance, counterweight: 855 mm (2'10")
Ground clearance (minimum): 400 mm (1'4")
Tail swing radius: 2 130 mm (7'0")
Length of track on ground: 2 750 mm (9'0")
Track length: 3 480 mm (11'5")
Track gauge: 1 960 mm (6'5")
Grouserr height: 25 mm (1")

DIMENSIONS
with shoe width 600 mm (24") and arm length 2.5 m (8'2"):

Shipping length: 7 595 mm (24'11")
Shipping height: 2 715 mm (8'11")
Overall width: 2 490 mm (8'2")
Width of crawler: 2 460 mm (8'1")
Overall height (to top of cab): 2 715 mm (8'11")
Ground clearance, counterweight: 855 mm (2'10")
Ground clearance (minimum): 400 mm (1'4")
Tail swing radius: 2 130 mm (7'0")
Length of track on ground: 2 750 mm (9'0")
Track length: 3 480 mm (11'5")
Track gauge: 1 960 mm (6'5")
Grouserr height: 25 mm (1")

DIMENSIONS
with shoe width 600 mm (24") and arm length 3.0 m (9'10"):

Shipping length: 7 510 mm (24'8")
Shipping height: 3 075 mm (10'1")
Overall width: 2 490 mm (8'2")
Width of crawler: 2 460 mm (8'1")
Overall height (to top of cab): 2 715 mm (8'11")
Ground clearance, counterweight: 855 mm (2'10")
Ground clearance (minimum): 400 mm (1'4")
Tail swing radius: 2 130 mm (7'0")
Length of track on ground: 2 750 mm (9'0")
Track length: 3 480 mm (11'5")
Track gauge: 1 960 mm (6'5")
Grouserr height: 25 mm (1")


WORKING RANGE:
Arm: 2.1 m (6'11")
Maximum digging height: 8 345 mm (27'5")
Maximum dumping height: 5 905 mm (19'4")
Maximum digging depth: 5 115 mm (16'9")
Maximum digging reach: 7 925 mm (26'0")
Maximum digging reach at ground level: 7 795 mm (25'7")
Minimum swing radius: 2 290 mm (7'6")

WORKING RANGE:
Arm: 2.5 m (8'2")
Maximum digging height: 8 610 mm (28'3")
Maximum dumping height: 6 170 mm (20'3")
Maximum digging depth: 5 520 mm (18'1")
Maximum digging reach: 8 290 mm (27'2")
Maximum digging reach at ground level: 8 170 mm (26'10")
Minimum swing radius: 2 330 mm (7'8")

WORKING RANGE:
Arm: 3.0 m (9'10")
Maximum digging height: 8 970 mm (29'5")
Maximum dumping height: 6 535 mm (21'5")
Maximum digging depth: 6 015 mm (19'9")
Maximum digging reach: 8 785 mm (28'10")
Maximum digging reach at ground level: 8 665 mm (28'5")
Minimum swing radius: 2 485 mm (8'2")


KOMATSU PC120-6 crawler hydraulic excavator.
KOMATSU PC120-6 crawler hydraulic excavator with thumb.
Holly Beach, LA, USA, 1-26-06 -- Equipment operator Chad Tupper removes House Debris at Holly Beach under FEMA's Damaged house demolish and removal program to remove debris at Parish and homeowners request.
FEMA is working with the local Parishes (Counties) who have requested FEMA's help in removing homes severely damaged by Hurricane Rita.
Date of the photo: 26 January 2006.
Author of the photo: Marvin Nauman - Federal Emergency Management Agency (FEMA).



KOMATSU PC120-6 excavator
KOMATSU PC120-6 excavator.
Holly Beach, LA, USA, 1-26-06 -- Equipment operator Chad Tupper removes House Debris at Holly Beach under FEMA's Damaged house demolish and removal program to remove debris at Parish and homeowners request.
FEMA is working with the local Parishes (Counties) who have requested FEMA's help in removing homes severely damaged by Hurricane Rita.
Date of the photo: 26 January 2006.
Author of the photo: Marvin Nauman - Federal Emergency Management Agency (FEMA).







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