TIER IV ACERA - highway-equipment.com Kobelco we design our excavators for a wide range of attachments and applications. ... (1.5 m) kg *1,690 1,420 *1,240 1,010 *1,030 750 *930 580

Operating Weight12,295 lbs (5,577 kg)

Net Horsepower39.3 hp (29.3 kW) @ 2,400 rpm

Max Digging Depth 12’10” (3.91 m)

Bucket Breakout Force11,240 lbf (50 kN)

TIER IV ACERA®

COMPACT EXCAVATOR55SRx

ACERA® 55SRx COMPACT EXCAVATOR

FULL-SIZE PERFORMANCE, SHORT-RADIUS AGILITY AND CONVENIENCEThe 55SRx is a true, short-radius excavator that works in a small footprint, but delivers the performance and features of a larger machine. You get extra stability, increased bucket size and superior lift capacity compared to similarly-sized, standard-swing-radius machines.

Maximum Performance and ProfitThe 55SRx is designed to lift heavier loads with exceptional stability. Reliable engine and hydraulic power, combined with robust design, gives you the performance you need on the job.• Leading bucket breakout force• Longer boom and arm as standard for larger working range• Excellent dig depth with maximum dig force where it is most needed — 0.5 to 1.0 m

below ground level• Maximum swing torque• Superior drawbar pull force• Larger fuel tank for extended continuous operation and the highest level of fuel

efficiency compared to competitive machines in the same class

Perfect for Tight SpacesThe 55SRx works in small areas similar to zero-tail-swing models. The compact design makes it ideal for narrow jobsites, and allows you to work within one traffic lane, minimizing inconvenience and disruption.

Compact Yet ToughThe Kobelco 55SRx is heavy-duty by design, with many robust features found on our larger Kobelco excavators.• Long X-frames provide excellent stability

and support• Thick-gauge, high-grade, reinforced steel

boom and arm for increased strength• Thick, high-quality, cast-iron boom swing

bracket assures longevity and durability• Sealed rollers, sprockets and travel motors extend track life

Digging, swinging, loading or dozing, the 55SRx satisfies demanding operators and offers profitable performance for owners.

X-frame design

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Standard center-swing boom/arm and easy-to-operate foot controls allow for digging, filling and grading along footings, curbs and foundations.

The 55SRx transports easily since its size and weight fit typical tag-along trailers and

the height to the top of the cab has been reduced to 8’4” (2.55m).

ACERA® 55SRx COMPACT EXCAVATOR

MORE SPACE AND MORE COMFORTTake your place in the operator’s seat, buckle up and get ready for an outstanding operating experience. Whether you choose the fully enclosed cab with heater and air conditioning or the 4-post ROPS/FOPS canopy, the new 55SRx full-size operator station allows you to work confidently and comfortably. The new cab is larger—a full 32 inches wide—offering more space and more comfort. Operators will also notice more floor space with a seat that adjusts farther from controls to ensure plenty of foot room.

A Superior ViewThe larger cab size also means larger windows on the fully enclosed cab. This, combined with the inboard-mounted HVAC system, allows for superior visibility to front, sides and rear. The front window features gas damper cylinders for smooth opening and closing.

Smart Control Layout for Comfortable, Easy OperationKobelco carefully studies operator ergonomics and designed the 55SRx operator station with a large entry/exit area, cushioned seats and operating controls and gauges located for convenience and easy reading. One-touch engine deceleration conserves fuel and reduces sound level. The result is improved comfort and extremely easy operation. In addition, it’s an extremely valuable feature during periods of excavator inactivity and when you need to communicate with others on the jobsite. Two-speed travel allows you to change speeds by pressing a button on the right travel lever.

Quiet ComfortOperators will favor the extremely quiet operation of the 55SRx. Anti-vibration engine mounts reduce the noise and vibration transferred to the cab.

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Clear visibility to the front, side and rear leads to more relaxed, more productive operators.

Simple, easy-to-read control panel keeps operators informed.

Handy under-seat storage compartment, hour meter and 12V power outlet allow for easy ground-level access or view.

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Standard auxiliary hydraulics provide a high flow of 21.7 gpm (82 lpm). Precise proportional controls are integrated into the joystick for ease of operation.

Standard pattern-control changer allows for increased

utilization and flexibility to match operator preference.

ACERA® 55SRx COMPACT EXCAVATOR

MAXIMIZING YOUR PRODUCTIVITY The 55SRx engine and hydraulic system are expertly matched to provide plenty of power for heavy digging and smooth control for fine grading.

Tier IV EngineThe 55SRx Tier IV engine is configured to deliver Tier IV interim emissions standards without the need for special exhaust components. Its fine-tuned engine performance results in exceptional power while delivering substantial fuel savings. The 55SRx radiator features a new intake method that simplifies cleaning and helps prevent clogging for outstanding cooling performance.

LEGENDARY KOBELCO HYDRAULICSSuperior hydraulic performance is part of every Kobelco model, and the 55SRx is no exception.

IFPS boosts work speed and increases earningsThe Kobelco Integrated-Flow Pump System (IFPS) automatically controls the integration of the machine’s three hydraulic pumps for excellent multi-function capability. This 3-pump “Smart System” allows for simultaneous operation of the swing and boom/arm functions while operating the dozer blade, without affecting travel speed or direction. It also allows for focused hydraulic flow when you need maximum breakout power.

With the Kobelco IFPS system, when the dozer and swing are not in operation, engine power normally directed to the third pump is used on arm action. This not only boosts the speed of the arm, it also contributes to increased efficiency since horsepower isn’t wasted to drive the third pump.

Auxiliary hydraulics are standardSince auxiliary hydraulics are standard equipment on the 55SRx, it is ready for specialized attachments. Maximum hydraulic flow increases 30% during the use of the extra circuit for breaker, nibbler, etc.

The convenient, protected adjustment location makes it easy to change between one-way or two-way flow, so you can quickly switch between hammer and other attachments such as a thumb. Secondary hydraulic lines are optional for rotation or tilt functions.

The standard accumulator allows operator to easily lower attachments

to the ground in the event of an emergency engine shutdown. 7

INTEGRATED-FLOW PUMP SYSTEMWhen using dozer

Flow to arm circuitto match control stroke All flow to arm circuitAll third pump flow

to dozer circuit

When swinging and raising arm When digging

VERSATILITY AND EASY MAINTENANCE IMPROVE YOUR BOTTOM LINEAt Kobelco we design our excavators for a wide range of attachments and applications. Rubber tracks are standard equipment with steel tracks optional to match all kinds of ground conditions. The 55SRx includes auxiliary hydraulics as standard equipment, and is factory-ready for grapples, breakers and other attachments.

STANDARD 2-WAY DOZER BLADEThe rugged Kobelco dozer blade—controlled by a lever from inside the cab—is ideal for dozing or back-filling. Durable box-frame blade supports provide extreme dependability.

The unique shape of Kobelco dozer blades improves efficiencyThe unique curvature of Kobelco’s original dozer blade “forms the earth into an arc” and produces unprecedented smooth movement of the soil. The dozer blade shape swiftly drives forward a large quantity of soil and turns the soil over as it moves forward so it doesn’t pile up against the blade and fall behind. With the Kobelco blade shape, the overflow soil escapes out to the sides, not over the top , leaving behind a clean finish without spills.

Maximum approach angle of 38 degreesThe maximum approach angle allows the dozer blade to be raised 19.5 inches (49.5 cm), so it’s easy to ride the machine over mounds of earth or to load the machine into a truck for transport.

4-WAY DOZER BLADE OPTIONBuilt with the same durability as the standard blade, the 4-way blade provides 23 to 25 degrees of left and right angle movement for clearing, grading and backfilling. The 4-way blade gives you better control for following changing terrain and helps eliminate the windrowing effect that can occur with standard dozer blades.

STEEL UNDERCARRIAGE OPTIONUnlike many competitive compact excavators, the Kobelco 55SRx is available with optional grease-lubricated steel tracks for longer service life while working in difficult conditions such as rock and debris that can cause problems for rubber tracks. Triple grouser steel track shoes provide durability and increased traction while minimizing ground disturbance. The steel tracks can be easily retrofitted to machines built with rubber tracks.

Standard lights and guard for boom

cylinder

ACERA® 55SRx COMPACT EXCAVATOR

EASY DAILY CHECKS FROM THE GROUNDWhen it’s time to perform routine maintenance, Kobelco makes it easy with ground-level access to:• Engine and hydraulic radiators• Engine, filters and coolant• Hydraulic valve body and hoses• Pattern changer/1-2 way hydraulic flow selector

In addition, it’s easy to access the electrical compartment under the seat and no tools are needed for fuel tank drain valves.

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A thumb bracket is standard for easy hook up of either hydraulic or mechanical thumb tools. A simple and easy quick coupler and a wide range of buckets are also available.

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A. Overall height ft in (m) 8’4” (2.55)

B. Overall length ft in (m) 17’ 10” (5.42)

C. Width of upper structure ft in (m) 6’ 4” (1.94)

D. Track overall length ft in (m) 8’ 1” (2.48)

E. Track overall width w/15.7 in (400 mm) shoes ft in (m) 6’ 5” (1.96)

F. Track shoe width in (mm) 15.7” (400)

G. Center to center (idler to sprocket) ft in (m) 6’ 6” (1.90)

H. Upper structure ground clearance in (mm) 24.5” (625)

J. Minimum ground clearance ft in (m) 1’ 2” (350)

K. Tail swing radius ft in (m) 4’ 2” (1280)

L. Backfill blade height ft in (m) 1’ 2” (345)

Working weight lb (kg) 12,181 (5525)

Ground pressure psi (kPa) 4.5 (31.3)

Boom swing degrees Left 70 / Right 60

Tail swing overhang ft in (m) 0’ 11.7” (299)

Arm ft in (m) 5’5” (1.65)

M. Maximum dig radius ft in (m) 20’ 5” (6.22)

N. Dig radius at groundline ft in (m) 19’ 11” (6.07)

P. Maximum dig depth ft in (m) 12’ 10” (3.91)

Q. Dump height ft in (m) 13’ 10” (4.20)

R. Overall reach height ft in (m) 18’ 11” (5.76)

S. Bucket rotation degrees 178

T. Vertical straight wall dig depth ft in (m) 10’ 0.5” (3.06)

Arm breakout force ISO lbf (kN) 5,598 (24.9)

Bucket breakout force, 2 position bucket ISO lbf (kN) 11,240 (50)

DIMENSIONS

PERFORMANCE SPECS

55SRx DIMENSIONS, PERFORMANCE SPECS

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55SRx LIFT CAPACITIES

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B

A Reach of swing centerline to bucket hookB Bucket hook height above/below groundC Lifting capacities in pounds and kilograms

LIFT POINT RADIUS

A 5’ (1.5 m) 7.5’ (2.3 m) 10’ (3.0 m) 12.5’ (3.8 m) 15.0’ (4.6 m) 17.5’ (5.3 m)

B C

15’ lb *1,800 *1,800(4.6 m) kg *810 *81012.5’ lb *1,640 *1,640 *1,860 1,740

(3.8 m) kg *740 *740 *840 78010’ lb *1,830 *1,830 1,850 1,750

(3.0 m) kg *830 *830 *830 7907.5’ lb *3,840 *3,840 *2,670 *2,670 *2,230 *2,230 *2,030 1,710

(2.3 m) kg *1,740 *1,740 *1,210 *1,210 *1,010 *1,010 *920 7705’ lb *3,730 3,140 *2,740 2,230 *2,280 1,660 *2,060 1,280

(1.5 m) kg *1,690 1,420 *1,240 1,010 *1,030 750 *930 5802.5’ lb *4,550 2,980 *3,190 2,140 *2,530 1,620 *2,160 1,260

(0.8 m) kg *2,060 1,350 *1,440 970 *1,140 730 *970 570Ground lb *3,710 *3,710 *4,910 2,900 *3,480 2,080 *2,700 1,580Level kg *1,680 *1,680 *2,220 1,310 *1,570 940 *1,220 710–2.5’ lb *4,130 *4,130 *5,940 4,630 *4,910 2,890 *3,550 2,060 *2,710 1,570

(-0.8 m) kg *1,870 *1,870 *2,690 2,100 *2,220 1,310 *1,610 930 *1,220 710–5’ lb *6,320 *6,320 *6,730 4,700 *4,570 2,920 *3,330 2,070

(-1.5 m) kg *2,860 *2,860 *3,050 2,130 *2,070 1,320 *1,510 930–7.5’ lb *9,150 *9,150 *5,450 4,810 *3,750 2,990

(-2.3 m) kg *4,150 *4,150 *2,470 2,180 *1,700 1,350–10’ lb *2,670 *2,670

(-3.0 m) kg *1,210 *1,210

LIFT POINT RADIUS

A 5’ (1.5 m) 7.5’ (2.3 m) 10’ (3.0 m) 12.5’ (3.8 m) 15.0’ (4.6 m) 17.5’ (5.3 m)

B C

15’ lb *1,800 *1,800(4.6 m) kg *810 *81012.5’ lb *1,640 *1,640 *1,860 1,810

(3.8 m) kg *740 *740 *840 82010’ lb *1,830 *1,830 1,850 1,810

(3.0 m) kg *830 *830 *830 8207.5’ lb *3,840 *3,840 *2,670 *2,670 *2,230 *2,230 *2,030 1,780

(2.3 m) kg *1,740 *1,740 *1,210 *1,210 *1,010 *1,010 *920 8005’ lb *3,730 3,250 *2,740 2,310 *2,280 1,730 *2,060 1,340

(1.5 m) kg *1,690 1,470 *1,240 1,040 *1,030 780 *930 6002.5’ lb *4,550 3,100 *3,190 2,230 *2,530 1,690 *2,160 1,320

(0.8 m) kg *2,060 1,400 *1,440 1,010 *1,140 760 *970 590Ground lb *3,710 *3,710 *4,910 3,020 *3,480 2,170 *2,700 1,650Level kg *1,680 *1,680 *2,220 1,360 *1,570 980 *1,220 740–2.5’ lb *4,130 *4,130 *5,940 4,810 *4,910 3,010 *3,550 2,150 *2,710 1,640

(-0.8 m) kg *1,870 *1,870 *2,690 2,180 *2,220 1,360 *1,610 970 *1,220 740–5’ lb *6,320 *6,320 *6,730 4,880 *4,570 3,030 *3,330 2,160

(-1.5 m) kg *2,860 *2,860 *3,050 2,210 *2,070 1,370 *1,510 970–7.5’ lb *9,150 *9,150 *5,450 4,990 *3,750 3,110

(-2.3 m) kg *4,150 *4,150 *2,470 2,260 *1,700 1,410–10’ lb *2,670 *2,670

(-3.0 m) kg *1,210 *1,210

CANOPY – 5 ft 5 in (1.65 m) ArmLift capacities calculated using 15.7 in (400 mm) shoes, 247 lb (112 kg) bucket, blade down.

CAB – 5 ft 5 in (1.65 m) Arm Lift capacities calculated using 15.7 in (400 mm) shoes, 247 lb (112 kg) bucket, blade down.

Rating over front Rating over side / 360 degrees

Notes:1. Do not attempt to lift or hold any load that exceeds these rated values at their specified load radii

and heights. Weight of all accessories must be deducted from the above lifting capacities.2. Lifting capacities assume a machine standing on a level, firm, and uniform supporting surface.

Operator must make allowance for job conditions such as soft or uneven ground, out of level conditions, side loads, sudden stopping of loads, hazardous conditions, inexperienced personnel, weight of various other buckets, lifting slings, attachments, etc.

3. Ratings at bucket lift hook.

4. The above rated loads are in compliance with SAE Hydraulic Excavator Lift Capacity Standard J 1097. They do not exceed 87% of hydraulic lifting capacity or 75% of tipping load. Rated loads marked with an asterisk (*) are limited by hydraulic capacity rather than tipping load.

5. Operator should be fully acquainted with the Operator’s and Maintenance Manuals before operating this machine. Rules for safe operation of equipment should be followed at all times.

6. Capacities apply only to the machine as originally manufactured and normally equipped by KOBELCO Construction Machinery America LLC.

55SRx STANDARD AND OPTIONAL EQUIPMENT

• 12V electrical starting system – includes heavy-duty battery and starting motor

• 12V electrical power outlet, in-cab• Adjustable, cushioned and weatherproof seat• Air cleaner with indicator for replacement• Armrests (two)• Boom center-swing pivot• Boom swing switch• Combined one-way or two-way auxiliary hydraulics with piping

and hand controls• Control panel includes key start switch, fuel level and coolant

temperature gauges, engine oil pressure lamp, coolant temperature lamp, battery charge lamp, low fuel warning lamp, air cleaner restriction lamp, high travel speed lamp and hour meter

• Cup holder• Electric horn w/switch• Emergency engine shutoff switch• Emergency hydraulic lowering accumulator• Engine decel switch• Fuel tank w/drain plug• Full hydrostatic drive system (2 axial piston motors)• Glow plugs starting aid• Hinged engine and hydraulic system covers• Hydraulic dozer blade w/raise/lower lever• Hydraulic filter change/access• Hydraulic lockout lever• Hydraulic oil tank and filter• Hydraulic tank site gauge• Hydraulically operated, fixed-width dozer blade• Integrated counter weight design• Operator control pattern changer (ISO/TLB)• Parking brake automatically applied and released

• Pilot operated wrist controls and foot pedals• Removable engine access cover below operator’s seat• Removable/replaceable rubber floor mat• ROPS/FOPS 3-post canopy• Rubber tracks• Seatbelt• Selector valve switch for nibbler or breaker• Service hour meter• Storage compartment (back of operator’s seat)• Swing lock (pin-type) mechanism• Swing parking break• Track tension adjuster (grease-type)• Thumb mounting bracket• Two axial piston pumps• Two joystick lever controls for boom, arm, bucket and swing• Two-speed travel with switch on travel lever• Warning screens alert you to temperature and pressure status• Water separator w/drain• Work lights (1-boom, 1-cab mounted)

OPTIONAL EQUIPMENT• Cab includes heater, air conditioning, wiper/washer and switch,

work lamp, emergency exit hammer, door release, dome light, tinted windows and AM/FM radio with speakers

• Werk Brau buckets, coupler, thumbs• Steel tracks• 4-way adjustable dozer blade

NOTE: Due to our policy of continual product improvement, all designs and specifications are subject to change without advance notice.

STANDARD EQUIPMENT

A patented, new tooth system featuring hammerless fastener technology.The SmartFit™ design improves digging performance by combining a strong, square adapter nose for extra strength with heavier, longer-lasting, self-sharpening teeth. Reusable, hammerless fasteners simplify tooth installation and replacement.

• Better penetration increases buckets per day• Outstanding hardness throughout the tooth increases durability.• 60% consumption ratio means SmartFit teeth stay in service longer for

better value.• Attach or change teeth in minutes, with no hammer needed.• Choose from light-duty general-purpose to heavy-duty abrasion-resistant

teeth to handle your application.

Ask your Kobelco dealer for recommendations based on your job conditions.

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Model Yanmar 4TNV88 BXPYBD

Cylinders 4

Bore/Stroke in (mm) 3.46 x 3.54 (88 x 90)

Displacement in3 (L) 133.5 (2.2)

Fuel injection Direct

Fuel injection pump Mechanical

Fuel Diesel

Fuel filter Full flow, paper element

Cooling Liquid

Horsepower per SAE J1349 @ 2400 rpm Net hp (kW) 39 (29)

Maximum torque @ 1440 rpm Net lbf (N•m) 97 (131)

ENGINE

Boom

Swing degrees 70 left / 60 right

Length ft in (m) 9’ 6” (2.89)

Arm

Length ft in (m) 5’ 5” (1.65)

BOOM/ARM

Number of rollers

Top each track 1

Bottom each track 5

Gradeability percent (degrees) 58 (30)

Drawbar Pull lbf (kN) 12,409 (55.2)

UNDERCARRIAGE

Hydraulic tank

Refill capacity gal (L) 9 (34)

Total system gal (L) 16 (61)

Engine oil w/filter change gal (L) 2 (7.4)

Fuel gal (L) 19.8 (75)

Radiator gal (L) 1.6 (6.0)

SERVICE CAPACITIES

With 551 lb (250 kg) bolt-on counterweight, 165 lb (75 kg) operator, 247 lb (112 kg) bucket, full fuel and standard equipment

lb (kg) 12,295 (5577)

OPERATING WEIGHT

Voltage 12 volts, negative ground

Alternator amp 40

Batteries (1) 12V Low-maintenance

ELECTRICAL

PumpsTandem variable

displacement axial piston pump

Capacity – Maximum gpm (L/min) 2 x 15 (2 x 57.1)

Auxiliary Flow gpm (L/min) 15 (57.1)

System relief pressure – Standard psi (MPa) 3,336 (23.0)

Pilot control hydraulic system

Pump (1) Gear pump

Maximum capacity gpm (L/min) 4 (15.2)

Relief pressure psi (MPa) 514 (3.5)

Control valves – 11 spool

Pilot control for left/right track travel, boom, arm,

bucket & swingManual control for breaker

& backfill blade

Swing/Dozer blade

Motor (1) Fixed displacementaxial piston design

Speed rpm 0-8.9

Brake Hydraulic Brake

Tail swing radius ft in (mm) 4’ 2” (1280)

Tail swing overhang ft in (mm) 0’ 11.7” (299)

Travel

Motor (2) Two-speed axial piston design

Final drive Planetary gear reduction

Travel speeds – forward/reverse

Low mph (km/h) 1.7 (2.7)

High mph (km/h) 2.9 (4.6)

HYDRAULICS

Boom cylinder (1)

Bore diameter in (mm) 3.94 (100)

Rod diameter in (mm) 2.17 (55)

Stroke in (mm) 26.8 (680)

Arm cylinder (1)

Bore diameter in (mm) 3.54 (90)

Rod diameter in (mm) 1.97 (50)

Stroke in (mm) 28.9 (735)

Bucket cylinder (1)

Bore diameter in (mm) 2.95 (75)

Rod diameter in (mm) 1.57 (40)

Stroke in (mm) 21.4 (543)

HYDRAULIC CYLINDERS

55SRx SPECIFICATIONS

WORLD CLASS PRODUCTS DEMAND WORLD CLASS DEALERS

The purchase of a Kobelco excavator isn’t the end, it’s the beginning of our relationship together. Consider your local

Kobelco dealer as your partner in productivity who will work with you to supply your business needs. Whether you

need assistance in selecting the right model for your operation or developing an affordable leasing or financing plan,

your Kobelco dealer can offer you sound advice because he has decades of heavy equipment experience.

Downtime can happen at any time. And that’s the best time to know you’ve got your

Kobelco dealer’s full service capabilities, the ‘one stop shop’ is just down the street.

Genuine Kobelco parts and all makes parts coverage, where and when you need

them. Factory-trained service technicians, warranty experts and parts manager

who are excavator experts. Fully equipped service vehicles which can bring

responsive support to you quickly, to get you back up and running. Even

customized professional maintenance programs, operator and technical training.

You want your Kobelco equipment investment to be productive and keep your

operation moving. So do we.

Your business deserves nothing less than world class product, supported by a world

class business partner. That’s your Kobelco dealer—your partner in productivity.

Kobelco Construction Machinery America LLC700 State StreetRacine, WI 53404 USA

www.kobelcoamerica.com

Products represented in this brochure may include optional equipment.

Note: Due to our policy of continual product improvement, all design, materials and/or specifications are subject to change without advance notice and without liability therefor. Specifications are applicable to units sold in Canada, the United States, its territories and possessions, and may vary outside these areas.

Safety begins with a thorough understanding of the equipment. Always make sure you and your operators read the Operator’s Manual before using the equipment. Pay close attention to all safety and operating decals and never operate machinery without all shields, protective devices and structures in place.

© 2011 CNH America LLC. All rights reserved. Kobelco is a brand licensed to Kobelco Construction Machinery Company America LLC. Any trademarks referred to herein, in association with goods and/or services of companies other than CNH America LLC, are the property of those respective companies. STOCK #KOB20110955SRX • PRINTED IN U.S.A.