Komatsu PC228US-3EO User manual

OPTIONAL EQUIPMENT
●Alternator, 60 Ampere, 24 V
●Arms
—2925 mm 9'7" arm assembly
●Batteries, large capacity
●Boom, 5700 mm 18'8"
●Cab accessories
—Rain visor
—Sun visor
●Cab front guard
—Full height guard
—Half height guard
●Heater with defroster
●Long lubricating intervals for work equip-
ment bushing (500 hours) except bucket
pin bushings
●Seat belt, retractable
●Seat, suspension
●Service valve
●Shoes, triple grouser
—PC228US-3E0:
700 mm 28", 800 mm 31.5"
—PC228USLC-3E0:
600 mm 24", 800 mm 31.5"
●Track frame undercover
●Track roller guards (full length)
STANDARD EQUIPMENT
●Air conditioner with defroster
●Alternator, 35 Ampere, 24 V
●Anti-slip plates
●Auto-Decel
●Automatic de-airation system for fuel line
●Automatic engine warm-up system
●Batteries, 110 Ah/2 x 12 V
●Boom holding valve
●Cab, OPG top guard level 1
●Counterweight
●Dry type air cleaner, double element
●Electric horn
●EMMS monitoring system
●Engine, Komatsu SAA6D107E-1
●Engine overheat prevention system
●Fan guard structure
●Hydraulic track adjusters (each side)
●Multi-function color monitor
●Power maximizing system
●PPC hydraulic control system
●Radiator and oil cooler dust proof net
●Rear reflector
●Rearview mirrors, RH, LH, rear, sidewise
●Starting motor, 4.5 kW/24 V x 1
●Suction fan
●Track guiding guard, center section
●Track roller
—PC228US-3E0, 7 each side
—PC228USLC-3E0, 9 each side
●Track shoe
—PC228US-3E0, 600 mm 24" triple grouser
—PC228USLC-3E0, 700 mm 28" triple
grouser
●Travel alarm
●Working light, 3 (boom and cab)
●Working mode selection system
www.Komatsu.com
CEN00131-02 Materials and specifications are subject to change without notice.
is a trademark of Komatsu Ltd. Japan.
Printed in Japan 200804 IP.As(10)
FLYWHEEL HORSEPOWER
Gross:116 kW 155 HP @ 2000 rpm
Net:110 kW 148 HP @ 2000 rpm
OPERATING WEIGHT
PC228US-3E0:21900– 22530 kg
48,280– 49,670 lb
PC228USLC-3E0:22630– 23180 kg
49,890– 51,100 lb
Photo may include optional equipment.
PC228US-3E0
PC228USLC-3E0
PC
228US
HYDRAULIC EXCAVATOR

HORSEPOWER
Gross:116 kW 155 HP @ 2000 rpm
Net:110 kW 148 HP @ 2000 rpm
OPERATING WEIGHT
PC228US-3E0:21900 – 22530 kg
48,280 – 49,670 lb
PC228USLC-3E0:22630 – 23180 kg
49,890 – 51,100 lb
BUCKET CAPACITY
0.50 – 0.93 m3
0.65 – 1.22 yd3
WALK-AROUND
HYDRAULIC EXCAVATOR HYDRAULIC EXCAVATOR
PC228US-3E0
PC228US-3E0 0
32
Ecology and Economy Features
●Low Emission Engine
A powerful, turbocharged and air-to-air aftercooled Komatsu
SAA6D107E-1 provides 110 kW 148 HP. This engine meets EPA Tier 3
and EU stage 3A emissions regulations, without sacrificing power or
machine productivity.
• Economy mode improves fuel consumption.
●Low Operation Noise
The dynamic noise is reduced compared with the PC228US-3,
realizing a low noise operation.
See page 4.
Easy Maintenance
• Long replacement interval of engine oil,
engine oil filter, and hydraulic filter
• Remote mounted engine oil filter and fuel
drain valve for easy access
• Equipped with the fuel pre-filter as standard
(with water separator)
• Side-by-side cooling function enables only
the cooling unit to be attached and detached.
• Equipped with the EMMS monitoring system.
See page 10.
Safety Features
• Anti-slip plates for safe work on machine
• Safety enhancement with large side-view, sidewise, and rear
mirrors added.
See page 9.
Photo is PC228USLC-3E0.
Photo may include optional equipment.
Safety Operation
• Excellent safety and operability in tight quarters with small
tail swing radius design
• Short protrusion of front and rear portion of the upper
structure from the track at swing thanks to its round profile
• Small road width occupation for the work
See page 7.
●Wide Working Ranges
Job sites that require a long upper
reach, such as demolition and slope
cutting also benefit from the increased
digging and dumping ranges of the
PC228US-3E0.
●High Mobility
• Large drawbar pull and steering
force display its ability when
operating on a slope.
• Excellent mobility with automatic
three-travel speed.
●High Stability
The PC228US-3E0 offers
exceptional lifting capacity
and high stability with a large
counterweight that requires
no additional clearance.
See page 5.
Productivity Features
Multi-function Color
Monitor
• Four working modes
designed to match engine
speed, pump delivery and
system pressure.
• Power mode for maximum
production/power
• Breaker mode for optimum
engine rpm, hydraulic flow,
and pressure
• Economy mode for lower
fuel consumption and noise
• Lifting mode for high lifting
capacity
See page 11.
Larger
Comfortable Cab
• Low noise design cab
with viscous cab
mounting
• Sliding convex door
facilitates easy
entrance in confined
areas.
• Large cab meets ISO
working space stan-
dards.
See page 8.
Komatsu’s PC228US-3E0 Series Hydraulic
Excavators have a short tail swing profile, designed
specifically for work in confined areas. By reducing tail swing, the PC228US-3E0
can work in areas where conventional profile excavators would pose a safety risk.
Excellent Reliability and
Durability
•High rigidity work equipment
•Sturdy frame structure
•Reliable Komatsu manufactured major
components
• Highly reliable electronic devices
See page 12.

Komatsu Technology
Komatsu develops and produces all major
components, such as engines, electronics
and hydraulic components, in house.
With this “Komatsu Technology,” and adding
customer feedback, Komatsu is achieving
great advancements in technology.
To achieve both high levels of productivity and
economical performance, Komatsu has devel-
oped the main components with a total control
system.
The result is a new generation of high perfor-
mance and environment-friendly excavators.
4
PRODUCTIVITY & ECOLOGY FEATURES
HYDRAULIC EXCAVATOR
Electronic control
unit for engine
Hydraulic system
controller
Engine
Heavy duty HPCR
(High Pressure
Common Rail)
system
Hydraulic control valve
Flow divide/merge control
with EPC
Main pump
Two pump independent control
LCD color monitor
5
Low Emission Engine
Komatsu SAA6D107E-1 meets EPA, Tier 3 and EU stage
3A emissions regulations and reduced NOx
emission by 29% compared with the
PC228US-3.
Low Operation Noise
Enables a low noise operation using the low-noise engine
and methods to cut noise at source.
Electronically controlled
common rail type engine
• Multi-staged injection
• Highly rigid cylinder block
Dynamic noise is reduced. (Compared with the PC228US-3)
Low-noise muffler
Optimal arrangement of
sound absorbing materials
HYDRAULIC EXCAVATOR
PC228US-3E0
PC228US-3E0 0
Large Digging Force
The machine has a digging force equal to that of PC200-8.
Furthermore, the operator can increase the power by 8 %
using single-touch power increase function when requiring
an extra power.
Excellent Travel Performance
With large drawbar pull and automatic gearshift function that
changes the travel speed between Hi and Lo speed at the
optimum shift point according to the load, the machine can
travel over the sever job site. The machine can also travel
quickly and speedy and comfortably travel while making a
turn.
Working Mode Application Advantage
Power mode ●Maximum production/power P●Fast cycle time
EEconomy mode ●Excellent fuel economy
LLifting mode ●Hydraulic pressure is
increased by 7%
Breaker ●Optimum engine rpm,
Bmode hydraulic flow for breaker
operation
Working Mode Selection
The PC228US-3E0 excavator is equipped with four working
modes (P, E, L and B mode). Each mode is designed to
match engine speed, pump speed, and system pressure with
the current application. This provides the flexibility to match
equipment performance to the job at hand.
Economy Mode
Economy mode is environmentally friendly. Fuel consumption
is reduced 14% (compared with PC228US-3 Active mode).
Lifting Mode
When the lifting mode is selected, lifting capacity is
increased 7% by raising hydraulic pressure.
Breaker Mode
Flow can be adjusted from the cab to match various attach-
ment requirements.
E
P
Economy
mode
LLifting
mode
BBreaker
mode
Power
mode
High Stability
The PC228US-3E0 offers exceptional lifting capacity and
high stability with a large counterweight that requires no
additional clearance.

76
SAFETY OPERATION FEATURES
HYDRAULIC EXCAVATOR
HYDRAULIC EXCAVATOR
PC228US-3E0
PC228US-3E0 0
PC200
180°swing width: 3.99 m 13'1"
3040 mm 10'0" 2750 mm 9'0"
2310 mm 7'7"
Protrusion from track:
PC228US 910 mm 3'0"
PC228USLC 770 mm 2'6"
PC200 1640 mm 5'5"
Protrusion from track:
PC228US 280 mm 11.0"
PC228USLC 140 mm 5.5"
PC200 1350 mm 4'5"
1680 mm 5'6"
Implement
swing
radius
reduced by
730 mm
2'5"
Tail swing
radius
reduced by
1070 mm
3'6"
Short Implement Swing
Radius:
2310 mm 7'7"—Boom raising
angle of the PC228US-3E0 is
larger than the PC200-8, while
front implement protrusion is
lessened.
Safety Operation with Small Tail Swing Even in Confined Areas
Road and Bridge Work
Lane width
4.5 m 14’9"
3990 mm
13'1"
Logging Road Work
Logging road width
approx. 4 m 13'1"
Short Tail Swing Radius:
1680 mm 5'6"—Because the tail
of the PC228US-3E0 is more
compact than conventional mod-
els, the PC228US-3E0 reduces
the operator’s need to check
behind him for movement.
Versatile Application with
Compact Machine Body and
Wide Working Range
Max. digging height 10700 mm 35'1"
Max. digging depth 6620 mm 21'9"
Max. digging reach 9875 mm 32'5"
Round Profile of Both Front and Rear Portion of the Upper Structure
for Safer Operation
Komatsu hydraulic excavators with small tail swing radius design adopt the round
profile for both left and right corners of the front portion of the upper structure as
well as its rear portion that features less protrusion from the track at swing. The
round profile design contributes to the prevention of contact accident at swing and
allows the machine to work in tight quarters or job sites where there are
some obstacles.
Protrusion from
the track:
(625 mm 24.6’’
including the mirror)
280mm 11’’
280mm 11’’ 280mm 11’’
280mm 11’’
Protrusion from
the track (rear)
Protrusion from
the track (rear)
Protrusion from the track:
(350 mm 13.8’’ including the mirror)
Roadwork
When performing a roadwork, protru-
sion of the machine to the unoccupied
lane is kept minimum since the rear
portion of the upper structure protrudes
slightly from the track at swing. This
allows a dump truck to be positioned
closer to the track of the machine. The
operator is able to load materials effi-
ciently onto the front of the dump body
at ease since ample dumping reach is
assured for the loading. Large working
space is not required for the machine.
Logging and forest roadwork
Since the protrusion of the rear portion
of the upper structure is kept minimum,
there is less possibility of the counter-
weight hitting against a tree or a slope,
allowing the operator to operate the
machine at ease. Furthermore, large
digging height facilitates a slope finish-
ing work large drawbar pull assures
smooth and powerful traveling even on
rough terrain.
Demolition
The machine needs less working
space and can perform efficient demo-
lition work since it has large and ample
digging height.

Sliding Convex Door
The sliding convex door facilitates
easy entrance in confined areas while
reducing the danger of being dam-
aged on roadways because the door
does not protrude when open. The cab
also features a sliding window on the
door.
Easy Pull-up Type Front Window
The front window with lightweight sash
frame can be pulled up easily. The win-
dow pulled
up can be
locked up at
the cab top
with a sin-
gle-touch.
Roomy Cab that Meets ISO
Operator Space Standard
The cab meets ISO operator space
standard and
provides a large
operator with
ample operation
space. The cab
has wide door
way for easy
getting on/off.
Large Capacity Air Conditioner
A 6,900 kcal air conditioner is utilized.
The bi-level control function keeps the
operator's head and feet cool and
warm respectively. This improved air
flow function keeps the inside of the
cab comfortable throughout the year.
Defroster function keeps cab glass
clear.
98
HYDRAULIC EXCAVATOR
WORKING ENVIRONMENT
HYDRAULIC EXCAVATOR
PC228US-3E0
PC228US-3E0 0
Safety Features
Sturdy Cab Protects the
Operator from Falling Objects
Fully press mold cab meets the ISO
head guard standard of OPG top guard
level 1. The cab is produced by means
of press integral molding and has a
strengthened frame structure with
improved total rigidity, featuring excel-
lent durability and impact resistance.
Combined with the adoption of inertia-
reel seat belt, the cab protects the
operator from falling objects.
PC228US-3E0 cab interior is spacious and provides a comfortable working
environment…
Large Comfortable
Cab
Multi-Position Controls
The multi-position, PPC (pressure
proportional control) levers allow the
operator to work in comfort
while maintaining precise control.
A double-slide mechanism allows the
seat and controllers to move together
or independently, allowing the operator
to position the seat and controllers for
maximum productivity and comfort.
Low Cab Noise
Cab is highly rigid and has excellent
sound absorption ability. Thorough
improvement of noise source reduction
and use of low noise engine, hydraulic
equipment, and air conditioner allows
this machine to generate a low level of
noise.
Comfortable Ride with
Multi-layer Viscous Cab Mounts
Multi-layer viscous mounts are adopted
for cab mount system. The cab mount
system absorbs shocks
and aids vibration
reduction to provide
comfortable ride.
Pressurized Cab
Optional air conditioner, air filter and a
higher internal air pressure (+3.0 mm
Aq +0.1"Aq) prevent external dust
from entering the cab.
Rubber
Silicon Oil
Inertia-reel Seat Belt
Easy-to-use inertia-reel seat belt is
employed. The belt support the opera-
tor in case of an emergency.
Tempered and Tinted Glass
Tempered and tinted glass that meets
occupational safety and health regula-
tions is used for cab windows. The
glass features high strength and blocks
ultraviolet rays.
Emergency Escape Hammer
The cab is equipped with a emergency
escape hammer to be used for break-
ing the rear window glass in case of an
emergency.
Start-to-travel Alarm
An alarm is installed as a standard
equipment to give other workers a
warning that the machine will start to
travel.
Pump/engine Room Partition
Pump/engine room partition prevents
oil from spraying on the engine if a
hydraulic hose should burst.
Anti-slip Plates
Highly durable anti-slip plates maintain
superior traction performance for the
long term.
Lock Lever
Locks the hydraulic system to prevent
unintentional movement. Neutral start
function allows
machine to be
started only in
lock position.
Large Side-view, Rear, and
Sidewise Mirrors
Enlarged left-side
mirror and addition
of rear and side
mirror allow the
PC228US-3E0 to
meet the new ISO
visibility require-
ments.
Wide Visibility
The right side window pillar has been
removed and the rear pillar reshaped
to provide better visibility.
Openable Skylight
Provides
upper visibility.

HYDRAULIC EXCAVATOR
MAINTENANCE FEATURES
HYDRAULIC EXCAVATOR
PC228US-3E0
PC228US-3E0 0
The PC228US-3E0 features the most
advanced diagnostics system in the
industry. The Komatsu exclusive
system identifies maintenance items,
reduces diagnostic times, indicates oil
and filter replacement hours and
displays error codes.
Continuous Machine Monitoring
System
When turning starting switch ON,
Check-before-starting item and
caution items appear on the liquid
crystal panel. If abnormalities are
found, a warning lamp blinks and a
warning buzzer sounds. The continu-
ous machine condition checks help
prevent the development of serious
problems and allows the operator to
concentrate on the controls.
Abnormally Display with Code
When an error occurs during
operation, a user code is displayed.
When an important user code is
displayed, a caution lamp blinks and
a warning buzzer sounds to prevent
the development of serious problems.
Oil Maintenance Function
When machine exceeds oil or filter
replacement time, the oil maintenance
monitor lights to inform operator.
Trouble Data Memory Function
Monitor stores abnormalities for
effective troubleshooting.
Maintenance display of the EMMS multi-color monitor (Example)
Normal display Maintenance time display Engine oil replacement display
Abnormal information & checking function display of the EMMS multi-
color monitor (Example)
Battery charging abnormal display Error code display Display for night work
Self-diagnostic Monitor
1
2
3
4
5
6
7
8
9
10
11
1
2
3
4
5
6
7
8
9
10
11
12
13
1 2 3
4 5 6
7 8 9
10 11
5
6
7
8
9
10
11
12
13
Indicators
Working mode
Service meter
Travel speed
Engine water temperature gauge
Hydraulic oil temperature gauge
Fuel gauge
Swing parking brake
Preheater
Wiper
Auto-decelerator
Power Max.
Switches
Power mode
Economy mode
Lifting mode
Breaker mode
Buzzer cancel
Selector switch
Auto-decelerator
Travel speed selection
Screen adjustment switch
Maintenance mode
Wiper
Windshield washer
Input control switches
1
2
3
4
Maintenance Costs Reduced
Long Replacement Interval of Hydraulic Oil and
Filter/Engine Oil and Filter
High performance filters are used in the hydraulic circuit and
engine. Longer hydraulic oil, hydraulic oil filter, engine oil
and engine oil filter element replacement
intervals significantly reduce
maintenance costs.
Engine oil &
engine oil filter every 500 hours
Hydraulic oil every 5000 hours
Hydraulic oil filter every 1000 hours
Long Work Equipment Greasing Interval (optional)
High quality BMRC bushings and resin shims are optionally
available for work equipment pins excluding bucket, extending
greasing interval to 500 hours (except bucket pin bushings).
LCD Multi-function Color
Monitor
Easy Maintenance
Komatsu designed the PC228US-3E0 to have easy service access. We know by doing this, routine maintenance and servic-
ing are less likely to be skipped, which can mean a reduction in costly downtime later on. Here are some of the many service
features found on the PC228US-3E0:
Optimum Maintenance Layout
Effortless access to engine-related maintenance items such as oil
filter, oil dipstick, coolant reserve tank, fuel filter, and air cleaner.
12 11
12
10
7
6
9
8
14
15
13
3
4
5
Engine
Pump
Central partition
Left rear side cover
Control valve
Hydraulic tank
Fuel tank
Radiator
Oil cooler
Air-cooled aftercooler
Engine hood
Right rear side cover
Right front side cover
Left rear side cover
1. Cooling water reserve
tank
2. Air cleaner
3. Battery
4. Tool box
5. Grease gun holder
Right rear side cover
6. Fuel pre-filter
7. Engine oil filter*
8. Oil filler for PTO*
9. Fuel drain valve*
Right front side cover
10. Windshield washer tank
Central partition
11. Oil level check pipe for
machinery
12. Oil filler for machinery
Opening/Closing of
engine hood
13. Engine oil check pipe
14. Engine oil filler
15. Fuel filter
*Remote maintenance items
Easy Radiator Cleaning
Since radiator and oil cooler are
arranged side-by-side, it is easy to
clean, remove and install them.
Equipped with the Fuel Pre-filter
(with Water Separator)
Removes water and
contaminants in the
fuel to prevent fuel
problems.
Washable Floor
The PC228US-3E0’s floor is easy to
keep clean. The gently inclined surface
has a flanged floormat and drainage
holes to facilitate runoff.
10 11

RELIABILITY FEATURES
HYDRAULIC EXCAVATOR
PC228US-3E0
SPECIFICATIONS
HYDRAULIC EXCAVATOR
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/cm20.48 kgf/cm2
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/cm20.41 kgf/cm2
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/cm20.37 kgf/cm2
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 in3
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/cm25,050 psi
Travel circuit . . . . . . . . . . . . . . . . 37.3 MPa 380 kgf/cm25,400 psi
Swing circuit . . . . . . . . . . . . . . . . 28.4 MPa 290 kgf/cm24,120 psi
Pilot circuit . . . . . . . . . . . . . . . . . . . . . 3.2 MPa 33 kgf/cm2470 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 m31.05 yd3backhoe 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

PC228US-3E0 PC228USLC-3E0
Arm 2925 mm 9'7" 2925 mm 9'7"
AOverall length 8700 mm 28'7" 8890 mm 29'2"
BOverall width 2980 mm 9'9" 3080 mm 10'1"
COverall height (to top of cab)* 3035 mm 9'11" 3035 mm 9'11"
DGround clearance, counterweight* 1060 mm 3'6" 1060 mm 3'6"
EMinimum Ground clearance 440 mm 1'5" 440 mm 1'5"
FTail swing radius 1680 mm 5'6" 1680 mm 5'6"
GLength of track on ground 3275 mm 10'9" 3655 mm 12'0"
HTrack length 4070 mm 13'4" 4450 mm 14'7"
ITrack gauge 2200 mm 7'3" 2380 mm 7'10"
JWidth of crawler 2800 mm 9'2" 3080 mm 10'1"
KShoe width 600 mm 23'6" 700 mm 27'6"
LGrouser height 26 mm 1" 26 mm 1"
MMachine cab height* 2285 mm 7'6" 2285 mm 7'6"
NUpper structure width 2980 mm 9'9" 2980 mm 9'9"
ODistance, swing center to rear end 1680 mm 5'6" 1680 mm 5'6"
14 15
AN
C
K
I
E
J
M
D
L
G
H
F,O
B
1011 987654321 0
0
1
2
3
4
5
6
7
1
2
3
4
5
6
7
8
9
10
11
12
(m)
(m)
H
D
E
C
A
G
2440 (8ft)
F
B
G.L.
Bucket Capacity
Number
(heaped) Width Weight Arm Length
SAE, PCSA CECE Without Side Cutters With Side Cutters With Side Cutters of Teeth 2.93 m 9'7"
0.50 m3 0.65 yd30.45 m30.59 yd3750 mm 29.5" 875 mm 34.4" 478 kg 1,050 lb 3 
0.80 m31.05 yd30.70 m30.92 yd31045 mm 41.1" 1170 mm 46.1" 635 kg 1,400 lb 5 
0.93 m31.22 yd30.80 m31.05 yd31200 mm 47.2" 1325 mm 52.2" 696 kg 1,530 lb 5 □
Arm 2925 mm 9'7"
AMax. digging height 10700 mm 35'1"
BMax. dumping height 7825 mm 25'8"
CMax. digging depth 6620 mm 21'9"
DMax. vertical wall
digging depth 5980 mm 19'7"
EMax. digging depth
of cut for 8' level 6370 mm 20'11"
FMax. digging reach 9875 mm 32'5"
GMax. digging reach
at ground level 9700 mm 31'10"
HMin. swing radius 2310 mm 7'7"
Bucket digging force 138 kN
at power max. 14100 kgf/31,080 lb
Arm crowd force 101 kN
at power max. 10300 kgf/22,710 lb
Bucket digging force 149 kN
at power max. 15200 kgf/33,510 lb
Arm crowd force 108 kN
at power max. 11000 kgf/24,250 lb
WORKING RANGE
DIMENSIONS
: General purpose use, density up to 1.8 ton/m31.52 U.S. ton/yd3
□: General purpose use, density up to 1.5 ton/m31.26 U.S. ton/yd3
BACKHOE BUCKET, ARM, AND BOOM COMBINATION
ISO rating SAE rating
LIFTING CAPACITY WITH LIFTING MODE
A: Reach from swing center
B: Bucket hook height
C: Lifting capacity
Cf: Rating over front
Cs: Rating over side
: Rating at maximum reach
Conditions:
●5700 mm 18'8" one-piece boom
●0.8 m3 1.05 yd3SAE heaped bucket
●Shoe width:
—PC228US-3E0 600 mm 24" triple
grouser
* Load is limited by hydraulic capacity rather than tipping. Ratings are based on SAE Standard No. J/ISO10567. Rated loads do not exceed 87% of hydraulic lift
capacity or 75% of tipping load.
PC228US-3E0 Arm: 2925 mm 9'7" Bucket: 0.8 m3 1.05 yd3SAE heaped Shoe: 600 mm 24” triple grouser
AMAX 7.5 m 24' 6.0 m 19' 4.5 m 14' 3.0 m 9' 1.5 m 4'
BCf Cs Cf Cs Cf Cs Cf Cs Cf Cs Cf Cs
6.0 m *2750 kg 2350 kg *4300 kg 3700 kg
19' *6,000 lb 5,200 lb *9,500 lb 8,200 lb
4.5 m *2750 kg 1900 kg 3850 kg 2300 kg *4900 kg 3550 kg *5450 kg *5450 kg
14' *6,100 lb 4,200 lb 8,500 lb 5,100 lb *10,800 lb 7,800 lb *12,100 lb *12,100 lb
3.0 m *2900 kg 1700 kg 3700 kg 2200 kg 5450 kg 3300 kg *7450 kg 5300 kg *11750 kg 10250 kg
9' *6,400 lb 3,700 lb 8,200 lb 4,800 lb 12,000 lb 7,300 lb *16,400 lb 11,700 lb *26,000 lb 22,600 lb
1.5 m 2850 kg 1600 kg 3600 kg 2050 kg 5200 kg 3050 kg 8300 kg 4750 kg *6800 kg *6800 kg
4' 6,300 lb 3,500 lb 7,900 lb 4,500 lb 11,400 lb 6,700 lb 18,300 lb 10,500 lb *15,000 lb *15,000 lb
0 m 2900 kg 1600 kg 3500 kg 1950 kg 4950 kg 2850 kg 7900 kg 4450 kg *7950 kg *7950 kg *7100 kg *7100 kg
0' 6,400 lb 3,600 lb 7,700 lb 4,300 lb 10,900 lb 6,300 lb 17,400 lb 9,800 lb *17,500 lb *17,500 lb *15,700 lb *15,700 lb
–1.5 m 3200 kg 1800 kg 3450 kg 1950 kg 4850 kg 2750 kg 7750 kg 4300 kg *11300 kg 8500 kg *10850 kg *10850 kg
-4' 7,000 lb 3,900 lb 7,600 lb 4,300 lb 10,700 lb 6,100 lb 17,100 lb 9,500 lb *24,900 lb 18,700 lb *23,900 lb *23,900 lb
–3.0 m 3850 kg 2150 kg 4900 kg 2750 kg 7800 kg 4350 kg *15600 kg 8700 kg
–9' 8,400 lb 4,800 lb 10,800 lb 6,100 lb 17,200 lb 9,600 lb *34,500 lb 19,100 lb
–4.5 m 5500 kg 3150 kg 8050 kg 4550 kg *13200 kg 9050 kg
–14' 12,100 lb 7,000 lb 17.700 lb 10,000 lb *29,100 lb 19,900 lb
A
B
C
A: Reach from swing center
B: Bucket hook height
C: Lifting capacity
Cf: Rating over front
Cs: Rating over side
: Rating at maximum reach
Conditions:
●5700 mm 18'8" one-piece boom
●0.8 m3 1.05 yd3SAE heaped bucket
●Shoe width:
—PC228USLC-3E0 700 mm 28" triple
grouser
* Load is limited by hydraulic capacity rather than tipping. Ratings are based on SAE Standard No. J/ISO10567. Rated loads do not exceed 87% of hydraulic lift
capacity or 75% of tipping load.
PC228USLC-3E0 Arm: 2925 mm 9'7" Bucket: 0.8 m3 1.05 yd3SAE heaped Shoe: 700 mm 28” triple grouser
AMAX 7.5 m 24' 6.0 m 19' 4.5 m 14' 3.0 m 9' 1.5 m 4'
BCf Cs Cf Cs Cf Cs Cf Cs Cf Cs Cf Cs
6.0 m *2750 kg *2750 kg *4300 kg *4300 kg
19' *6,000 lb *6,000 lb *9,500 lb *9,500 lb
4.5 m *2750 kg 2350 kg *4650 kg 2750 kg *4900 kg 4150 kg *5450 kg *5450 kg
14' *6,100 lb 5,100 lb *10,300 lb 6,100 lb *10,800 lb 9,200 lb *12,100 lb *12,100 lb
3.0 m *2900 kg 2100 kg 4700 kg 2650 kg *5850 kg 3900 kg *7450 kg 6250 kg *11750 kg *11750 kg
9' *6,400 lb 4,600 lb 10,300 lb 5,800 lb *12,900 lb 8,600 lb *16,400 lb 13,800 lb *26,000 lb *26,000 lb
1.5 m *3200 kg 2000 kg 4550 kg 2500 kg 6550 kg 3650 kg *9400 kg 5700 kg *6800 kg *6800 kg
4' *7,100 lb 4,400 lb 10,000 lb 5,600 lb 14,500 lb 8,100 lb *20,700 lb 12,500 lb *15,000 lb *15,000 lb
0 m *3700 kg 2000 kg 4450 kg 2400 kg 6350 kg 3450 kg 10250 kg 5350 kg *7950 kg *7950 kg
0' *8,200 lb 4,400 lb 9,800 lb 5,300 lb 14,000 lb 7,600 lb 22,600 lb 11,800 lb *17,500 lb *17,500 lb
–1.5 m 4100 kg 2200 kg 4400 kg 2350 kg 6250 kg 3350 kg 10100 kg 5250 kg *11300 kg 10450 kg *7100 kg *7100 kg
-4' 9,000 lb 4,900 lb 9,700 lb 5,200 lb 13,700 lb 7,400 lb 22,300 lb 11,600 lb *24,900 lb 23.100 lb *15,700 lb *15,700 lb
–3.0 m 4900 kg 2650 kg 6250 kg 3350 kg 10150 kg 5300 kg *15650 kg 10650 kg *10850 kg *10850 kg
–9' 10,800 lb 5,900 lb 13,800 lb 7,400 lb 22,400 lb 11,700 lb *34,500 lb 23,500 lb *23,900 lb *23,900 lb
–4.5 m *6900 kg 3850 kg *9150 kg 5500 kg *13200 kg 11050 kg
–14' *15,200 lb 8,400 lb *20,200 lb 12,100 lb *29,100 lb 24,300 lb
* Excluding grouser height
A
B
C