R
ELIABILITY
F
EATURES
H
Y D R A U L I C
E
X C A V A T O R
PC228US
-3E0
S
PECIFICATIONS
H
Y D R A U L I C
E
X C A V A T O R
PC228US
-3E0
High Rigidity Work Equipment
Boom and arms are constructed of thick plates of high tensile strength steel. In
addition, these structures are designed with large cross-sectional areas and
generous use of castings. The result is working attachments that exhibit long term
durability and high resistance to bending and torsional stress.
Grease
Grease Sealed Track
PC228US-3E0 uses grease sealed
tracks for extended undercarriage life.
Track Link with Strut
PC228US-3E0 uses track links with
strut, providing superb durability.
Metal Guard Rings Protect all
the Hydraulic Cylinders and
Improve Reliability.
DT-type Connectors
DT-type connectors seal tight and have
higher reliability.
O-ring Face Seal
The hydraulic hose seal method has
been changed from a conventional
taper seal to an O-ring seal. This
provides improved sealing
performance.
Waterproof seal
Waterproof seal
Waterproof seal
Metal guard ring
(Cast iron ring)
Piston ring
Wear ring
PC228US-3E0
PC228USLC-3E0
Operating
Ground
Operating
Ground
Shoes
Weight
Pressure
Weight
Pressure
600 mm
21900 kg
50.0 kPa
22630 kg
47 kPa
0.51 kgf/cm
2
0.48 kgf/cm
2
24"
48,280 lb
7.25 psi
49,890 lb
6.83 psi
700 mm
22280 kg
43.1 kPa
22900 kg
40.2 kPa
0.44 kgf/cm
2
0.41 kgf/cm
2
28"
49,120 lb
6.26 psi
50,490 lb
5.83 psi
800 mm
22530 kg
38.2 kPa
23180 kg
36 kPa
0.39 kgf/cm
2
0.37 kgf/cm
2
31.5"
49,670 lb
5.55 psi
51,100 lb
5.26 psi
ENGINE
Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Komatsu SAA6D107E-1
Type . . . . . . . . . . . . . . . . . . . . Water-cooled, 4-cycle, direct injection
Aspiration. . . . . . . . . . . . . . . . . . . . . . . . . Turbocharged, aftercooled
Number of cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
107 mm
4.21"
Stroke. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
124 mm
4.88"
Piston displacement. . . . . . . . . . . . . . . . . . . . . . . . . .
6.69 ltr
408 in
3
Horsepower:
SAE J1995. . . . . . . . . . . . . . . . . . . . . . . . . Gross
116 kW
155 HP
ISO 9249 / SAE J1349. . . . . . . . . . . . . . . . . . Net
110 kW
148 HP
Rated rpm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2000 rpm
Fan drive method for radiator cooling . . . . . . . . . . . . . . . Mechanical
Governor . . . . . . . . . . . . . . . . . . . . . . . . All-speed control, electronic
Meets EPA Tier 3 and EU stage 3A
HYDRAULICS
Type . . HydrauMind (Hydraulic Mechanical Intelligence New Design)
system, closed-center system with load sensing valves and
pressure compensated valves
Number of selectable working modes . . . . . . . . . . . . . . . . . . . . . . . 4
Main pump:
Type . . . . . . . . . . . . . . . . . . . . . Variable displacement piston type
Pumps for . . . . . . . . Boom, arm, bucket, swing, and travel circuits
Maximum flow. . . . . . . . . . . . . . . . . .
428 ltr/min
113 U.S. gal/min
Supply for control circuit . . . . . . . . . . . . . . . . . Self-reducing valve
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 . . . . . . . . . . . .
37.3 MPa
355 kgf/cm
2
5,050 psi
Travel circuit . . . . . . . . . . . . . . . .
37.3 MPa
380 kgf/cm
2
5,400 psi
Swing circuit . . . . . . . . . . . . . . . .
28.4 MPa
290 kgf/cm
2
4,120 psi
Pilot circuit . . . . . . . . . . . . . . . . . . . . .
3.2 MPa
33 kgf/cm
2
470 psi
Hydraulic cylinders:
(Number of cylinders – bore x stroke x rod diameter)
Boom . . . . . .
2 – 120 mm x 1385 mm x 85 mm
4.7" x 54.5" x 3.3"
Arm . . . . . . .
1 – 135 mm x 1490 mm x 95 mm
5.3" x 58.7" x 3.7"
Bucket:
. . . . . 1 – 115 mm x 1120 mm x 80 mm
4.5" x 44.1" x 3.2"
DRIVES AND BRAKES
Steering control . . . . . . . . . . . . . . . . . . . . . . . Two levers with pedals
Drive method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hydrostatic
Maximum drawbar pull . . . . . . . . . . . . . .
202 kN
20600 kg 45,410 lb
Gradeability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70%, 35°
Maximum travel speed: High . . . . . . . . . . . . . . . . .
5.5 km/h
3.4 mph
(Auto-Shift)
Mid. . . . . . . . . . . . . . . . . .
4.1 km/h
2.5 mph
(Auto-Shift)
Low . . . . . . . . . . . . . . . . .
3.0 km/h
1.9 mph
Service brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hydraulic lock
Parking brake . . . . . . . . . . . . . . . . . . . . . . . . . Mechanical disc brake
SWING SYSTEM
Drive method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hydrostatic
Swing reduction. . . . . . . . . . . . . . . . . . . . Planetary double reduction
Swing circle lubrication . . . . . . . . . . . . . . . . . . . . . . . Grease-bathed
Service brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hydraulic lock
Holding brake/Swing lock . . . . . . . . . . . . . . . . Mechanical disc brake
Swing speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.0 rpm
UNDERCARRIAGE
Center frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . X-frame
Track frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Box-section
Seal of track . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sealed track
Track adjuster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hydraulic
Number of shoes (each side):
PC228US-3E0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
PC228USLC-3E0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Number of carrier rollers . . . . . . . . . . . . . . . . . . . . . . . . . 2 each side
Number of track rollers (each side):
PC228US-3E0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
PC228USLC-3E0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
COOLANT AND LUBRICANT
CAPACITY
(REFILLING)
Fuel tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
320 ltr
84.5 U.S. gal
Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21.0 ltr
5.5 U.S. gal
Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23.1 ltr
6.1 U.S. gal
Final drive, each side . . . . . . . . . . . . . . . . . . . . . .
5.2 ltr
1.4 U.S. gal
Swing drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.1 ltr
1.9 U.S. gal
Hydraulic tank . . . . . . . . . . . . . . . . . . . . . . . . . .
126 ltr
33.3 U.S. gal
OPERATING WEIGHT
(APPROXIMATE)
Operating weight including
5700 mm
18'8" one-piece boom,
2925 mm
9'7" arm, SAE heaped
0.80 m
3
1.05 yd
3
backhoe bucket,
rated capacity of lubricants, coolant, full fuel tank, operator, and
standard equipment.
Durable Arm Tip Bushing
The end face of arm tip bushing provides
high resistance to seizure and wear.
12
13
Sturdy Frame Structure
The revolving frame, center frame
and undercarriage are designed by
using the most advanced three-
dimensional CAD and FEM analysis
technology.
Highly Reliable Electronic
Devices
Exclusively designed electronic
devices have passed severe testing.
●
Controller
●
Sensors
●
Connectors
●
Heat resistant
wiring
Reliable Components
All of the major machine components,
such as engine, hydraulic pumps,
hydraulic motors and control valves
are exclusively designed and
manufactured by Komatsu.
Strut
