DRIVES AND 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. . . . . . . . . . . . .
559 kN
57000 kg 125,660 lb
Gradeability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70%
Maximum travel speed
Low. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.8 km/h
1.7 mph
High . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 km/h
2.6 mph
Service brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hydraulic lock
Parking brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Oil disc brake
UNDERCARRIAGE
Center frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H-leg frame
Track frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Box-section
Seal of track. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sealed
Track adjuster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hydraulic
No. of shoes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 each side
No. of carrier rollers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 each side
No. of track rollers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 each side
COOLANT AND LUBRICANT
CAPACITY
(REFILLING)
Fuel tank . . . . . . . . . . . . . . . . . . . . . . . . . . .
980 ltr
258.9 U.S. gal
Radiator . . . . . . . . . . . . . . . . . . . . . . . . . . . .
100 ltr
26.4 U.S. gal
Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
58 ltr
15.3 U.S. gal
Final drive, each side . . . . . . . . . . . . . . . . . . .
20 ltr
5.3 U.S. gal
Swing drive . . . . . . . . . . . . . . . . . . . . . .
24.5 x 2 ltr
6.5 x 2 U.S. gal
Hydraulic tank . . . . . . . . . . . . . . . . . . . . . . .
440 ltr
116.2 U.S. gal
OPERATING WEIGHT
(APPROXIMATE)
PC850-8: Operating weight, including
8040 mm
26'5" boom,
3600
mm
11'10" arm, SAE heaped
3.4 m
3
4.45 yd
3
backhoe bucket,
operator, lubricant, coolant, full fuel tank, and the standard equipment.
PC850SE-8: Operating weight, including
7100 mm
23'4" boom,
2945
mm
9'8" arm, SAE heaped
4.3 m
3
5.62 yd
3
backhoe bucket, operator,
lubricant, coolant, full fuel tank, and the standard equipment.
12
13
S
PECIFICATIONS
HYDRAULIC EXCAVATOR
PC850
-8
0
ENGINE
Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Komatsu SAA6D140E-5
Type . . . . . . . . . . . . . . . . . . . . 4-cycle, water-cooled, direct injection
Aspiration . . . . . . . . . . . . . . Turbocharged, aftercooled, cooled EGR
Number of cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
140 mm
5.51"
Stroke. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
165 mm
6.50"
Piston displacement . . . . . . . . . . . . . . . . . . . . . . . . .
15.24 ltr
930 in
3
Governor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . All-speed, electronic
Horsepower:
SAE J1995 . . . . . . . . . . . . . . . . . . . . . . . . Gross
370 kW
496 HP
ISO 9249 / SAE J1349* . . . . . . . . . . . . . . . . . Net
363 kW
487 HP
Rated rpm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1800 rpm
Fan drive type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hydraulic
Meets EPA Tier 3 and EU Stage 3A emission regulations.
*Net horsepower at the maximum speed of radiator cooling fan is 338 kW 453HP.
HYDRAULIC 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 . . . . . . . . . . . .
2 x 494 ltr/min
2 x 130.5 U.S. gpm
Fan drive pump . . . . . . . . . . . . . . . . . . Variable capacity piston type
Fan drive pump . . . . . . . . . . . . . . . . . . Variable capacity piston type
Hydraulic motors:
Travel . . . . . . . . . . . . . . . 2 x axial piston motor with parking brake
Swing . . . . . . . . . . 2 x axial piston motor with swing holding brake
Relief valve setting:
Implement circuits . . . . . . . . . . .
31.4 MPa
320 kg/cm
2
4,550 psi
Travel circuit . . . . . . . . . . . . . . .
34.3 MPa
350 kg/cm
2
4,980 psi
Swing circuit . . . . . . . . . . . . . . .
28.4 MPa
290 kg/cm
2
4,120 psi
Heavy lift circuit . . . . . . . . . . . . .
34.3 MPa
350 kg/cm
2
4,980 psi
Pilot circuit . . . . . . . . . . . . . . . . . .
2.9 MPa
30 kg/cm
2
430 psi
Hydraulic cylinders:
Number of cylinders—bore x stroke
Boom. . . . . . . . . . . . . . . .
2 – 200 mm x 1950 mm
7.9" x 76.8"
Arm
. . . . . . . . . . . . . . . . . 2 – 185 mm x 1610 mm
7.3" x 63.4"
Bucket
Std . . . . . . . . . . . . . . . .
1 – 185 mm x 1820 mm
7.3" x 71.7"
SE. . . . . . . . . . . . . . . . .
1 – 225 mm x 1420 mm
8.9" x 55.9"
SWING SYSTEM
Driven method . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hydraulic motors
Swing reduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Planetary gear
Swing circle lubrication . . . . . . . . . . . . . . . . . . . . . . . Grease-bathed
Swing lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Oil disc brake
Swing speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.8 rpm
PC850-8
PC850SE-8
Operating
Ground
Operating
Ground
Shoes
Weight
Pressure
Weight
Pressure
610 mm
78700 kg
128 kPa
78300 kg
127 kPa
1.31 kgf/cm
2
1.30 kgf/cm
2
24"
173,500 lb
18.6 psi
172,620 lb
18.5 psi
710 mm
79500 kg
112 kPa
79100 kg
111 kPa
1.14 kgf/cm
2
1.13 kgf/cm
2
28"
175,270 lb
16.2 psi
174,380 lb
16.1 psi
WORKING RANGE
BACKHOE DIMENSIONS
BACKHOE BUCKET, ARM, AND BOOM COMBINATION
Unit:
mm
ft in
These charts are based on over-side stability with fully loaded bucket at maximum reach.
: General purpose use, density up to 1.8 t/m
3
3,000 lb/yd
3
: General purpose use, density up to 1.5 t/m
3
2,500 lb/yd
3
— : Not useable
3640
11'11"
840
2'9"
610
24"
3500
11'6"
4110
13'6"
3490
11'5"
When retracted
3195
10'6"
A
B
50
2.0"
1560
5'1"
3670
12'
4000
13'1"
4345
14'3"
R=4400
14'5"
4500
14'9"
5810
19'1"
2
1
3
0
4
5
6
7
8
9
10
11
12
13
14
1
2
3
4
5
6
7
8
9
10
11
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
G
F
H
B
E
D
C
A
2440
8ft
PC850-8
PC850SE-8
Boom length
8040 mm
26'5"
7100 mm
23'4"
Arm length
3600 mm
11'10"
2945 mm
9'8"
3600 mm
11'10"
A
Max. digging height
11955 mm
39'3"
11330 mm
37'2"
11055 mm
36'3"
B
Max. dumping height
8235 mm
27'0"
7525 mm
24'8"
7430 mm
24'5"
C
Max. digging depth
8445 mm
27'8"
7130 mm
23'5"
7790 mm
25'7"
D
Max. vertical wall
digging depth
5230 mm
17'2"
4080 mm
13'5"
4260 mm
14'0"
E
Max. digging depth
of cut for 8' level
8310 mm
27'3"
6980 mm
22'11"
7680 mm
25'2"
F
Max. digging reach
13660 mm
44'10"
12265 mm
40'3"
12710 mm
41'8"
G
Max. digging reach
at ground level
13400 mm
44'0"
11945 mm
39'2"
12400 mm
40'8"
H
Min. swing radius
5985 mm
19'8"
5645 mm
18'6"
5440 mm
17'10"
Bucket digging force (SAE)
316 kN
391 kN
316 kN
32200 kgf / 70,990 lb 39900 kgf / 87,960 lb 32200 kgf / 70,990 lb
Arm crowd force (SAE)
285 kN
331 kN
285 kN
29100 kgf / 64,150 lb 33800 kgf / 74,520 lb 29100 kgf / 64,150 lb
Bucket digging force (ISO)
363 kN
431 kN
363 kN
37000 kgf / 81,570 lb 43900 kgf / 96,780 lb 37000 kgf / 81,570 lb
Arm crowd force (ISO)
298 kN
341 kN
298 kN
30400 kgf / 67,020 lb 34800 kgf / 76,720 lb 30400 kgf / 67,020 lb
PC850-8
PC850SE-8
8.04 m
26'5" boom
7.1 m
23'4" boom
3.6 m
11'10" arm
2.9 m
9'8" arm
A Overall Height
4850 mm
15'11"
4615 mm
15'2"
B Overall Length
13995 mm
45'11"
13130 mm
43'1"
BUCKET CAPACITY (HEAPED)
WIDTH
Without side
With side
WEIGHT
SAE, PCSA
CECE
shrouds
shrouds
(with side shrouds)
ARM LENGTH
m
3
yd
3
m
3
yd
3
mm
in
mm
in
kg
lb
m
ft in
PC850-8 (use with 8.04 m boom)
3.6
11'10"
3.4
4.45
3.0
3.92
1820
71.7"
1870
73.6"
3500
7,720
PC850SE-8 (use with 7.1 m boom)
2.9
9'8"
3.6
11'10"
4.0
5.23
3.5
4.58
2000
78.7"
2105
82.9"
4000
8,820
4.0
5.23
3.5
4.58
2000
78.7"
2105
82.9"
3435
7,570
—
4.3
5.62
3.8
4.97
2150
84.6"
2255
88.8"
3870
8,530
—
4.5
5.87
4.0
5.23
2230
87.8"
2330
91.9"
4050
8,930
—
H
Y D R A U L I C
E
X C A V A T O R
PC850
-8
*For heavy duty
*
