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■ Bucket Capacity:
0.11 - 0.35 m3 ISO heaped
■ Engine Power:
42 kW/2,200 min-1 ISO14396
■ Operating Weight:
6,940 kg

Complies with the latest exhaust emission regulations

US EU (NRMM) Latest Japanese

EPA Tier III Stage IIIA Regulations
 Fuel Consumption Gives You
the Competitive Edge

KOBELCO’s SR hydraulic excavator has seen a new

evolution.
KOBELCO has installed its full range of fuel-saving
technologies in this SR model, resulting in un-
matched low fuel consumption that heads the class in
engine-driven hydraulic excavators.

Outstanding performance in tight spaces, on-site

safety, less stress for the operator … KOBELCO was
first to understand these demands and in response
developed SR, short rear swing, excavators. The
acclaimed SR concept went on to be adopted
throughout the industry.
But KOBELCO didn’t stop there. Aware of changing
needs among machine users in a changing social en-
vironment, KOBELCO has taken the SR concept
through a further evolution with value-added features.
Adding an AIS auto-idling-stop feature—another first
in the industry—helps save energy, and KOBELCO’ s
unique design for engine cooling, the iNDr system,
cuts noise to extremely low levels.
The newest KOBELCO approach to low fuel consump-
tion, NEXT-3E, now also applies to short rear swing
models, to maximize work volumes while saving on
fuel. And the new ECO-mode in the SK75SR creates
even greater savings on fuel to turn SR models into
exceptional high-earning machines.
KOBELCO continues to lead the field in short rear
swing excavators.


Five Ways the SK75SR Scores:

More Work with Less Fuel!

Efficient Performance!
Fast, Accurate and Low-Cost Maintenance
A Working Environment that Helps Operator Concentrate on the Job
Low Noise: iNDr

Pursuing the “Three E’s”

The Perfection of Next-Generation,
Network Performance

Enhancement
Greater Performance Capacity

Economy
Improved Cost Efficiency

Environment
Features That Go Easy on the Earth

Acera Geospec
The “GEO” in GEOSPEC expresses our respect for our planet,
and for the solid ground where excavators are in their element.
This is accompanied by SPEC, which refers to the performance
specifications needed to get the job done efficiency as we carry
on the tradition of the urban-friendly ACERA series.


 More Work with Less Fuel!
Simply select… 3 work modes
ECO-mode
Work modes for a closer match to the
job in hand. An addition to the existing
H-mode and S-mode, the new ECO-
mode saves even more energy.

H-mode: For heavy duty when a higher performance level is

Fuel Consumption and Work Volume required.
S-mode: For normal operations with lower fuel consumption.
The new hydraulic system and an additional ECO-mode
have cut fuel consumption by up to 27%. ECO-mode: Puts priority on low fuel consumption and economic
performance.

H-mode (vs previous SK70SR in H-mode)

Fuel consumption (L/h)

6 % decrease
Work volume per liter of fuel (m3/L)

6 % increase
S-mode (vs previous SK70SR in H-mode)
Fuel consumption (L/h)

13 % decrease
Work volume per liter of fuel (m3/L)

15 % increase
ECO-mode (vs previous SK70SR in S-mode)
Great leap forward in energy-saving performance
Fuel consumption (L/h)

27 % decrease
Work volume per liter of fuel (m3/L)

31 % increase
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Significant Extension of Continuous Working Hours

The combination of a large-
capacity fuel tank and excel- Fuel tank capacity:
lent fuel efficiency delivers an
impressive increase in the 120 L
length of continuous working.


 Economy

NEXT-3E Technology NEXT-3E Technology

1 New Hydraulic System 2 High Reliable Engine
KOBELCO’s hydraulic circuit analysis is combined with the The engine is a PFR-pump fuel injection engine for high
use of new, high-efficiency pumps in a three-pump reliability. It is equipped with cooled EGR that lowers the
electro-hydraulic actuator control system that replaces the temperature of the air intake to reduce its oxygen concen-
conventional mechanical system. It all adds up to a tration. It achieves big reductions in particulate matter (PM)
hydraulic system that delivers the best outcome: top-class and NOx emissions while boosting output.
work performance on less fuel. $LULQWDNH ([KDXVW
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NEXT-3E Technology
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3 Total Tuning Through Advanced ITCS Control
The next-generation engine control is governed by a new
version of ITCS, which responds quickly to sudden changes
in hydraulic load to ensure that the engine runs as effi-
ciently as possible with a minimum of wasted output.
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Auto Idle Stop Provided as Standard

Equipment
This function saves fuel and cut emissions by shutting
down the engine automatically when the machine is on
stand by. It also stops the hourmeter, which helps to retain
the machine’s asset value.

Automatic Acceleration / Deceleration

Function Reduces Engine Speed
Engine speed is automatically
reduced when the control lever is /HYHU2II 1HXWUDO
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placed in neutral, effectively

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saving fuel and reducing noise
and exhaust emissions. The /HYHU2Q
engine quickly returns to the
/HYHU6WURNH
previous speed when the lever is
moved out of neutral.


 Efficient Performance!
Top-Class Powerful Digging N&B Hosing option
For more efficient work performance. Nibbler & Breaker specs are fitted optionally. The selector
valve, located inside the right side cover, can be accessed
Max. arm crowding force: 39.4 kN {4.0 tf} from the ground. Hydraulic flow to attachments is controlled
from the cab.
Max. bucket digging force: 52.7 kN {5.4 tf}
Powerful Travel, Powerful Steering
A new type of travel motor boosts travel torque by 6%, and
lighter machine weight improves steering performance by
10% over the previous model, for better maneuverability
and crisper turns.
6HOHFWRUYDOYH $WWDFKPHQWVHOHFWRUVZLWFK

Travel torque: 6% increase

Drawbar pulling force: 76.8 kN {7.8 tf}

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Dozer Simultaneous Operations

With separate pumps for travel motor and dozer there’s no
hydraulic interference when traveling at top speed. Dozer
operation is fast, rugged and stress-free.
'R]HUEODGHLVRSWLRQDO


 Enhancement

Excellent Working Ranges Great Swing Power, Short Cycle Times

Greater working ranges with class-topping vertical digging Powerful swing power and top-class swing speed.
depth.
Swing torque: 19.1 kN m
Max. digging height: Swing speed: 11.5 min-1
7,410 mm
(20 mm more than previous model)
Requires 3.0 m of Working Space
Max. dumping height: The compact design allows the machine to perform
5,340 mm continuous dig, 180° swing and dump operations within a
(10 mm more than previous model)
working space of 3.0 m.
Min. front Tail swing
swing radius radius
Max. digging reach: 1,710 mm 1,290 mm
6,480 mm
(20 mm more than previous model)

Max. vertical digging depth:

3,870 mm
(60 mm more than previous model)

Tail overhang
140 mm

Working radius 3,000 mm

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DQGWDLOVZLQJUDGLXV

Mild Operating Sound

The iNDr cooling system also helps to keep the machine
quiet, even at close quarters.

Meets EMC Electromagnetic Compatibility

Standards in Europe
Electrical shielding ensured that the machines clear all
European standards and neither cause or are affected by
electromagnetic interference.


 Fast, Accurate and Low-Cost Maintenance
Comfortable “On the Ground” Maintenance
All of components that require regular maintenance are laid out for easy access. Newly designed, the bonnet opens widely and at
lower level.
And in a new layout, equipment that requires maintenance is positioned in easily accessible locations. The servicing jobs can be
completed from ground or in the cab.
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Fast Maintenance

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 Economy

iNDr Means Easy Maintenance

iNDr Filter Blocks Out Dust Visual Checking and Easy Cleaning
Outside air goes directly When checking and cleaning
from the intake duct the cooling system, one
through the iNDr filter for must deal with several differ-
dust removal. The filter fea- ent components like the
tures a 60-mesh screen, radiator, oil cooler and inter-
which means it has sixty cooler, which all must be
holes per inch both verti- handed in different ways. But
cally and horizontally, with a with the iNDr filter, there’s
wide front surface area just one filter in one place. If
accordion structure that it looks dirty during start-up
resist clogging. inspection, it can be cleaned
(DV\DFFHVVWR easily and quickly.
PDLQFRQWUROYDOYHV

Long-Interval Maintenance ife

Long-l oil:
ulic
1 %VHOHFWRU Long-life hydraulic oil reduces hydra
RSWLRQDO
cost and labor.

0XOWLFRQWURO
YDOYH RSWLRQDO  Super-Fine Filter
High-performance, super-fine
filter has a 1,000 hour
replacement cycle.

Easy Cleaning Double-Element Air Cleaner

Detachable two-piece The high-performance air cleaner has twice the capacity
floor mat with handles and service life of previous air cleaners and is installed
for easy removal. A floor behind the iNDr filter for even more effective cleaning
drain located under floor performance.
mat.
Monitor Display with Essential
Information for Accurate Maintenance Checks
Internal and external air
Displays only the maintenance
conditioner filters can be
information that’s needed,
easily removed without
when it’s needed.
tools for cleaning.
Self-diagnostic function that
provides early-warning
detection and display of
electrical system malfunctions.
Special crawler frame Record function of previous
designed is easily breakdowns including irregular
cleaned of mud. and transient malfunction.

Choice of 16 Languages for Monitoring Display

With messages including those requiring urgent action
displayed in the local language, users in all parts of the
world can work with greater peace of mind.


 A Working Environment that Helps the Operator Conce
Big Cab
The “Big cab” provides a
roomy operating space
with plenty of legroom,
and the door opens wide
for entry and exit. As well
as giving a wide, open
view to the front, the cab
has increased window
areas on both sides and
to the rear, for improved
visibility in all directions.

Excellent Visibility
Taking out the right-side cab support to make a single
window has improved visibility to the right.

Wide-Access Cab Aids Smooth Entry and Exit Comfortable Operating Environment
Easy entry and exit assured with wider cab entry and safety
lock lever integrated with mounting for control levers.

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 Environment

ntrate on the Job at Hand!

ROPS Cab
The newly developed, ROPS (Roll-Over-Protective
Structure)-compliant cab clears ISO standards (ISO-
12117-2: 2008) and ensures greater safety for the operator
should the machine tip over.

Safety Features That Take Various

Scenarios into Consideration

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Always Easy to Read!

New Information Display
Large gauges with large numbers and
letters and glare-reducing visors are
always easy to read regardless of
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working conditions.
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 Environment

The Revolutionary Integrated Noise and Dust Reduction Cooling System

Ultimate Low Noise
KOBELCO’s exclusive iNDr Cooling System delivers amazingly quiet operation. In fact the SK75SR is 5 dB quieter than the value
designated by the Japanese governments requirement for ultra-low-noise machinery.

“Ultimate”-Low Noise Level of

93dB(A)

The iNDr revolution

Concept Reduces Noise Reduces Dust

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 Specifications

Engine Travel System

Model ISUZU AU-4LE2X Travel motors: 2 x axial-piston, two-step motors
Direct injection, water-cooled, 4-cycle diesel engine Travel brakes: Hydraulic brake per motor
With turbocharger, intercooler Parking brakes: Oil disc brake per motor
(Complies with EU (NRMM)
Type: Stage IIIA, US EPA Tier III, Travel shoes: 39 each side
and act on regulation, etc. of emission Travel speed: 5.3 2.6 km/h
from non-road special motor vehicles (Japan))
Drawbar pulling force: 76.8 kN {7,830 kgf} (ISO 7464)
No. of cylinders: 4
Bore and stroke: 85 mm x 96 mm Gradeability: 70 % {35°}
Displacement: 2.179 L
42 kW /2,200 min-1 (ISO14396: Without fan)
Rated power output:
41 kW /2,200 min-1 (ISO9249: With fan) Cab & Control
Max. torque: 211 N m/1,600 min-1 {rpm} (ISO14396: Without fan)
Cab
210 N m/1,600 min-1 {rpm} (ISO9249: With fan)
All-weather, sound-suppressed steel cab mounted on the silicon-sealed
viscous mounts and equipped with a heavy, insulated floor mat.
Control
Hydraulic System Two hand levers and two foot pedals for travel
Two hand levers for excavating and swing
Pump Electric rotary-type engine throttle
Two variable displacement pumps +
Type:
one gear pump
Max. discharge flow: 2 x 66 L/min, 1 x 18 L/min Boom, Arm & Bucket
Relief valve setting
Boom, arm and bucket: 32.9 MPa {335 kgf/cm2} Boom cylinder: 110 mm x 916 mm
Travel circuit: 29.4 MPa {300 kgf/cm2} Arm cylinder: 95 mm x 833 mm
Bucket cylinder: 80 mm x 735 mm
Dozer blade circuit: 22.1 MPa {225 kgf/cm2}
Swing circuit: 24.5 MPa {250 kgf/cm2}
Control circuit: 5.0 MPa {50 kgf/cm2}
Pilot control pump: Gear type Dozer Blade (Optional)
Main control valves: 12-spool Dozer cylinder: 135 mm x 129 mm
Oil cooler: Air cooled type Dimension: 2,300 mm (width) x 460 mm (height)
Working range: 360 mm (up) x 250 mm (down)

Swing System
Swing motor: Axial piston motor
Refilling Capacities & Lubrications
Hydraulic; locking automatically when Fuel tank: 120 L
Brake:
the swing Control lever is in neutral position Cooling system: 8.5 L
Parking brake: Oil disc brake, hydraulic operated Engine oil: 11 L
automatically Travel reduction gear: 2 x 1.35 L
Swing speed: 11.5 min-1 {rpm} Swing reduction gear: 1.5 L
Tail swing radius: 1,290 mm 36 L tank oil level
Hydraulic oil tank:
Min. front swing radius: 1,710 mm 85 L hydraulic system

Attachments
Backhoe bucket and arm combination
Backhoe bucket
Standard Narrow Wide
Use

ISO heaped m3 0.28 0.11 0.14 0.18 0.22 0.35

Bucket capacity
Struck m3 0.25 0.09 0.12 0.14 0.18 0.26
With side cutter mm 750 — 480 550 650 850
Opening width
Without side cutter mm 680 400 410 480 580 780
No. of bucket teeth 4 3 3 3 4 4
Bucket weight kg 210 190 160 170 190 —
1.71 m Standard arm
Combinations
2.13 m Long arm —
Standard Recommended Loading only


 Specifications

Working Ranges
Unit: m
Boom 3.84 m a
Arm Standard Long b
Range 1.71 m 2.13 m h
a- Max. digging reach 6.48 6.88 8m
b- Max. digging reach 7
6.35 6.76
at ground level
c- Max. digging depth 4.16 4.58 6
d- Max. digging height 7.41 7.75 5
e- Max. dumping clearance 5.34 5.67
f- Min. dumping clearance 2.46 2.19 4
d
g- Max. vertical wall 3
3.87 4.34 e
digging depth
2
h- Min. swing radius 1.71 2.11
i - Horizontal digging stroke
f 1
2.83 3.21
at ground level
0
j - Digging depth for 2.4 m (8') i
3.80 4.31 1
flat bottom
Bucket capacity ISO heaped m3 0.28 0.22 j g
c 2

Digging Force (ISO 6015) Unit: kN (kgf) 3

Standard Long 4
Arm length
1.71 m 2.13 m Standard Arm
Bucket digging force 52.7 {5,370} 52.7 {5,370} 5m
7m 6 5 4 3 2 1m Long Arm
Arm crowding force 39.4 {4,020} 35.2 {3,450}

Dimensions
Unit: mm
Standard Long G Tail swing radius 1,290
Arm length
1.71 m 2.13 m H Tumbler distance 2,210
A Overall length 5,830 6,360 I Ovrall length of crawler 2,830
B Overall height (to top of boom) 2,520 2,490 J Track gauge 1,850
C Overall width of crawler 2,300 K Shoe width 450/600
D Overall height (to top of cab) 2,550 L Overall width of upperstructure 2,250
E Ground clearance of rear end* 700
M Dozer blade (up/down)** 360 (26 )/250
F Ground clearance* 350
* Without including height of shoe lug
** Dozer blade is optional.

A L

B D
26

E
M F

K
H J
I C

Operating Weight & Ground Pressure

In standard trim, with standard boom, 1.71 m arm, and 0.28 m3 ISO heaped bucket
Shaped Triple grouser shoes (even height)
Shoe width mm 450 600
Overall width of crawler mm 2,300 2,450
Ground pressure kPa {kgf/cm2} 31.2 {0.32} 24.1 {0.24}
Operating weight kg 6,640 7,160


 Lifting Capacities

A – Reach from swing centerline for bucket hook

Rating over front B – Bucket hook height above/below ground
C – Lifting capacities in kilograms
Rating over side or 360 degrees * Max. discharge pressure: 29.4 MPa {300 kgf/cm2}

SK75SR Standard Arm: 1.71 m, Bucket: 0.28 m3 ISO heaped 210 kg Shoe: 450 mm with optional dozer blade
A 1.5 m 3.0 m 4.5 m At Max. Reach
Radius
B
6.0 m kg *1,680 *1,680 *1,520 *1,520 3.15 m
4.5 m kg *1,950 *1,950 *1,550 1,310 *1,320 1,230 4.64 m
3.0 m kg *4,730 *4,730 *2,510 *2,510 1,500 1,250 1,090 900 5.34 m
1.5 m kg 2,760 2,200 1,390 1,150 960 790 5.56 m
G.L. kg 2,560 2,020 1,310 1,060 980 800 5.37 m
-1.5 m kg *4,060 *4,060 2,530 1,990 1,290 1,050 1,200 980 4.70 m
-3.0 m kg *2,450 *2,450 *1,700 *1,700 *1,510 *1,510 3.28 m

SK75SR Standard Arm: 1.71 m, Bucket: 0.28 m3 ISO heaped 210 kg Shoe: 600 mm with optional dozer blade
A 1.5 m 3.0 m 4.5 m At Max. Reach
Radius
B
6.0 m kg *1,540 *1,540 3.00 m
4.5 m kg *1,930 *1,930 *1,370 1,320 *1,320 1,300 4.59 m
3.0 m kg *4,510 *4,510 *2,460 *2,460 1,520 1,270 1,140 950 5.33 m
1.5 m kg 2,790 2,790 1,410 1,170 1,000 830 5.56 m
G.L. kg *1,810 *1,810 2,580 2,580 1,330 1,090 1,020 840 5.37 m
-1.5 m kg *4,130 *4,130 2,560 2,560 1,310 1,070 1,260 1,030 4.68 m
-3.0 m kg *2,340 *2,340 *1,600 *1,600 *1,490 *1,490 3.21 m

SK75SR Long Arm: 2.13 m, Bucket: 0.22 m3 ISO heaped 170 kg Shoe: 450 mm with optional dozer blade
A 1.5 m 3.0 m 4.5 m At Max. Reach
Radius
B
6.0 m kg *1,330 *1,330 3.82 m
4.5 m kg *1,590 1,350 1,190 1,040 5.12 m
3.0 m kg *2,220 *2,220 1,530 1,270 950 790 5.76 m
1.5 m kg 2,820 2,260 1,400 1,160 850 690 5.96 m
G.L. kg 2,550 2,010 1,300 1,060 850 690 5.78 m
-1.5 m kg *3,500 *3,500 2,480 1,950 1,260 1,020 1,010 820 5.17 m
-3.0 m kg *3,440 *3,440 *2,150 2,010 *1,520 1,310 3.93 m

SK75SR Long Arm: 2.13 m, Bucket: 0.22 m3 ISO heaped 170 kg Shoe: 600 mm with optional dozer blade
A 1.5 m 3.0 m 4.5 m At Max. Reach
Radius
B
6.0 m kg *1,350 *1,350 3.70 m
4.5 m kg *1,580 1,360 *1,190 1,100 5.07 m
3.0 m kg *2,180 *2,180 1,540 1,290 1,000 830 5.74 m
1.5 m kg 2,850 2,290 1,420 1,180 880 730 5.96 m
G.L. kg *1,800 *1,800 2,580 2,040 1,320 1,080 890 730 5.78 m
-1.5 m kg *3,570 *3,570 2,510 1,980 1,280 1,040 1,060 860 5.16 m
-3.0 m kg *3,320 *3,320 *2,070 *2,050 *1,510 1,400 3.87 m

Notes:
1. Do not attempt to lift or hold any load that is greater than these lift capacities at 4. The above lifting capacities are in compliance with SAE J/ISO 10567. They do
their specified lift point radius and heights. Weight of all accessories must be not exceed 87 % of hydraulic lifting capacity or 75 % of tipping load. Lifting
deducted from the above lift capacities. capacities marked with an asterisk (*) are limited by hydraulic capacity rather
2. Lift capacities are based on machine standing on level, firm, and uniform than tipping load.
ground. User must make allowance for job conditions such as soft or uneven 5. Operator should be fully acquainted with the Operator’s and Maintenance
ground, out of level conditions, side loads, sudden stopping of loads, hazardous Instructions before operating this machine. Rules for safe operation of
conditions, experience of personnel, etc. equipment should be adhered to at all times.
3. Bucket lift hook is defined as lift point. 6. Lift capacities apply to only machines as originally manufactured and normally
equipped by KOBELCO CONSTRUCTION MACHINERY CO., LTD.


STANDARD EQUIPMENT
ENGINE CAB & CONTROL
Engine, ISUZU AU-4LE2X engine with turbocharger and Two control levers, pilot-operated
intercooler Horn, electric
Automatic engine deceleration Integrated left-right slide-type control box
Auto Idle Stop (AIS) Ashtray
Batteries (2 x12V – 64 Ah) Cigarette lighter
Starting motor (24 V- 3.2 kW), 30 A alternator Cab light (interior)
Automatic engine shut-down for low engine oil pressure Coat hook
Engine oil pan drain valve Large cup holder
Double element air cleaner Detachable two-piece floor mat
Retractable seatbelt
CONTROL Headrest
Working mode selector (H-mode, S-mode and ECO-mode) Arm rest
Handrails
SWING SYSTEM & TRAVEL SYSTEM Heater and defroster
Swing rebound prevention system Intermittent windshield wiper with double-spray washer
Two-speed travel with automatic shift down Tinted safety glass
Sealed & lubricated track links Pull-type front window and removable lower front window
Grease-type track adjusters Easy-to-read multi-display monitor
Automatic swing brake Automatic air conditioner
Emergency escape hammer
MIRRORS & LIGHTS Heightrizer for control box
Four rear view mirrors
Two front working lights (boom, guard)

OPTIONAL EQUIPMENT
Dozer blade Add-on type counterweight (+400 kg)
Wide range of bucket Cab light
Various optional arms Control pattern charger (2 way, 4 way)
Wide range of shoes N&B piping, N&B selector
Boom safety valve 7-way adjustable suspension seat
Front-guard protective structure (may interfere with Radio, AM/FM Stereo with speaker
bucket action)
Additional hydraulic circuit
Additional counterweight (+300 kg)

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