309 CR

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An extensive line of Cat® mini hydraulic excavators offers the performance to dig in and be productive on every job.

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Specifications

Air Conditioning System

Air Conditioning

The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1.0 kg of refrigerant which has a CO2 equivalent of 1.430 metric tonnes.
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Blade

Height

17 in 431 mm
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Width - Wide

104 in 2640 mm
{"Name":"Width - Wide","SpecificationId":null,"TextValue":null,"EnglishUnit":"in","EnglishValue":"104","MetricUnit":"mm","MetricValue":"2640","Type":"measurement","SpecificationGroup":"Blade","SortOrder":"99"}
Width - Standard

97 in 2470 mm
{"Name":"Width - Standard","SpecificationId":null,"TextValue":null,"EnglishUnit":"in","EnglishValue":"97","MetricUnit":"mm","MetricValue":"2470","Type":"measurement","SpecificationGroup":"Blade","SortOrder":"99"}

Certification - Cab

Roll Over Protective Structure (ROPS)

ISO 12117-2:2008
{"Name":"Roll Over Protective Structure (ROPS)","SpecificationId":null,"TextValue":"ISO 12117-2:2008","EnglishUnit":null,"EnglishValue":null,"MetricUnit":null,"MetricValue":null,"Type":"text","SpecificationGroup":"Certification - Cab","SortOrder":"99"}
Top Guard

ISO 10262:1998 (Level I)
{"Name":"Top Guard","SpecificationId":null,"TextValue":"ISO 10262:1998 (Level I)","EnglishUnit":null,"EnglishValue":null,"MetricUnit":null,"MetricValue":null,"Type":"text","SpecificationGroup":"Certification - Cab","SortOrder":"99"}
Tip Over Protective Structure (TOPS)

ISO 12117:1997
{"Name":"Tip Over Protective Structure (TOPS)","SpecificationId":null,"TextValue":"ISO 12117:1997","EnglishUnit":null,"EnglishValue":null,"MetricUnit":null,"MetricValue":null,"Type":"text","SpecificationGroup":"Certification - Cab","SortOrder":"99"}

Dimensions - Long Stick

Dig Depth

182.8 in 4642 mm
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Maximum Dump Clearance

199.7 in 5072 mm
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Boom In Reach

126.6 in 3215 mm
{"Name":"Boom In Reach","SpecificationId":null,"TextValue":null,"EnglishUnit":"in","EnglishValue":"126.6","MetricUnit":"mm","MetricValue":"3215","Type":"measurement","SpecificationGroup":"Dimensions - Long Stick","SortOrder":"99"}
Vertical Wall

134 in 3404 mm
{"Name":"Vertical Wall","SpecificationId":null,"TextValue":null,"EnglishUnit":"in","EnglishValue":"134","MetricUnit":"mm","MetricValue":"3404","Type":"measurement","SpecificationGroup":"Dimensions - Long Stick","SortOrder":"99"}
Maximum Blade Depth

26 in 671 mm
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O/A Undercarriage Length

126 in 3200 mm
{"Name":"O/A Undercarriage Length","SpecificationId":null,"TextValue":null,"EnglishUnit":"in","EnglishValue":"126","MetricUnit":"mm","MetricValue":"3200","Type":"measurement","SpecificationGroup":"Dimensions - Long Stick","SortOrder":"99"}
O/A Track Width

97.2 in 2470 mm
{"Name":"O/A Track Width","SpecificationId":null,"TextValue":null,"EnglishUnit":"in","EnglishValue":"97.2","MetricUnit":"mm","MetricValue":"2470","Type":"measurement","SpecificationGroup":"Dimensions - Long Stick","SortOrder":"99"}
Stick Length

92.8 in 2358 mm
{"Name":"Stick Length","SpecificationId":null,"TextValue":null,"EnglishUnit":"in","EnglishValue":"92.8","MetricUnit":"mm","MetricValue":"2358","Type":"measurement","SpecificationGroup":"Dimensions - Long Stick","SortOrder":"99"}
Maximum Blade Height

16.1 in 408 mm
{"Name":"Maximum Blade Height","SpecificationId":null,"TextValue":null,"EnglishUnit":"in","EnglishValue":"16.1","MetricUnit":"mm","MetricValue":"408","Type":"measurement","SpecificationGroup":"Dimensions - Long Stick","SortOrder":"99"}
Maximum Dig Height

277.1 in 7039 mm
{"Name":"Maximum Dig Height","SpecificationId":null,"TextValue":null,"EnglishUnit":"in","EnglishValue":"277.1","MetricUnit":"mm","MetricValue":"7039","Type":"measurement","SpecificationGroup":"Dimensions - Long Stick","SortOrder":"99"}
Tail Swing with Counterweight

62.4 in 1585 mm
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Maximum Reach

300.7 in 7637 mm
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Cab Height

100 in 2541 mm
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Ground Clearance

14 in 356 mm
{"Name":"Ground Clearance","SpecificationId":null,"TextValue":null,"EnglishUnit":"in","EnglishValue":"14","MetricUnit":"mm","MetricValue":"356","Type":"measurement","SpecificationGroup":"Dimensions - Long Stick","SortOrder":"99"}
Swing Bearing - Height

29.7 in 756 mm
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Track Belt/Shoe Width

17.7 in 450 mm
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Boom Swing - Left

23.8 in 604 mm
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Boom Swing - Right

36.8 in 935 mm
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Tail Swing without Counterweight

57.1 in 1450 mm
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Maximum Reach - Ground Level

293.7 in 7460 mm
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Note

*Boom Height when stick is pinned in transport position with no attachments.
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Note (2)

***With blade positioned at the rear of the machine.
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Note (1)

**Boom Height when stick is pinned in working position with attachments Standard Stick offers only one pin position.
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Height - Boom Transport - No Tools*

89 in 2260 mm
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Overall Shipping Length - with Counterweight

7052 mm (277.6 in)***
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Height - Boom Working - With Tools**

120.1 in 3050 mm
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Overall Shipping Length - without Counterweight

7052 mm (277.6 in)***
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Dimensions - Standard Stick

Boom Swing - Right

36.8 in 935 mm
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Maximum Dump Clearance

187.4 in 4760 mm
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Tail Swing without Counterweight

57.1 in 1450 mm
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Maximum Reach - Ground Level

273.6 in 6949 mm
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O/A Undercarriage Length

126 in 3200 mm
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Cab Height

100 in 2541 mm
{"Name":"Cab Height","SpecificationId":null,"TextValue":null,"EnglishUnit":"in","EnglishValue":"100","MetricUnit":"mm","MetricValue":"2541","Type":"measurement","SpecificationGroup":"Dimensions - Standard Stick","SortOrder":"99"}
Swing Bearing - Height

29.7 in 756 mm
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Maximum Dig Height

265.2 in 6736 mm
{"Name":"Maximum Dig Height","SpecificationId":null,"TextValue":null,"EnglishUnit":"in","EnglishValue":"265.2","MetricUnit":"mm","MetricValue":"6736","Type":"measurement","SpecificationGroup":"Dimensions - Standard Stick","SortOrder":"99"}
Track Belt/Shoe Width

17.7 in 450 mm
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O/A Track Width

97.2 in 2470 mm
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Ground Clearance

14 in 356 mm
{"Name":"Ground Clearance","SpecificationId":null,"TextValue":null,"EnglishUnit":"in","EnglishValue":"14","MetricUnit":"mm","MetricValue":"356","Type":"measurement","SpecificationGroup":"Dimensions - Standard Stick","SortOrder":"99"}
Maximum Reach

281.1 in 7141 mm
{"Name":"Maximum Reach","SpecificationId":null,"TextValue":null,"EnglishUnit":"in","EnglishValue":"281.1","MetricUnit":"mm","MetricValue":"7141","Type":"measurement","SpecificationGroup":"Dimensions - Standard Stick","SortOrder":"99"}
Tail Swing with Counterweight

62.4 in 1585 mm
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Boom In Reach

120.4 in 3059 mm
{"Name":"Boom In Reach","SpecificationId":null,"TextValue":null,"EnglishUnit":"in","EnglishValue":"120.4","MetricUnit":"mm","MetricValue":"3059","Type":"measurement","SpecificationGroup":"Dimensions - Standard Stick","SortOrder":"99"}
Vertical Wall

117.8 in 2991 mm
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Dig Depth

161.7 in 4108 mm
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Stick Length

71.8 in 1820 mm
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Boom Swing - Left

23.8 in 604 mm
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Maximum Blade Height

16.1 in 408 mm
{"Name":"Maximum Blade Height","SpecificationId":null,"TextValue":null,"EnglishUnit":"in","EnglishValue":"16.1","MetricUnit":"mm","MetricValue":"408","Type":"measurement","SpecificationGroup":"Dimensions - Standard Stick","SortOrder":"99"}
Maximum Blade Depth

26 in 671 mm
{"Name":"Maximum Blade Depth","SpecificationId":null,"TextValue":null,"EnglishUnit":"in","EnglishValue":"26","MetricUnit":"mm","MetricValue":"671","Type":"measurement","SpecificationGroup":"Dimensions - Standard Stick","SortOrder":"99"}
Note

*Boom Height when stick is pinned in transport position with no attachments.
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Overall Shipping Length - without Counterweight

266.7 in 6774 mm
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Overall Shipping Length - with Counterweight

266.7 in 6774 mm
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Note (2)

***With blade positioned at the rear of the machine.
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Note (1)

**Boom Height when stick is pinned in working position with attachments Standard Stick offers only one pin position.
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Height - Boom Transport - No Tools*

95.7 in 2430 mm
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Height - Boom Working - With Tools**

104.7 in 2660 mm
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Engine

Net Power

69.5 hp 51.8 kW
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Engine Model

Cat C3.3B
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Displacement

203 in³ 3.33 l
{"Name":"Displacement","SpecificationId":null,"TextValue":null,"EnglishUnit":"in³","EnglishValue":"203","MetricUnit":"l","MetricValue":"3.33","Type":"measurement","SpecificationGroup":"Engine","SortOrder":"99"}
Bore

3.7 in 94 mm
{"Name":"Bore","SpecificationId":null,"TextValue":null,"EnglishUnit":"in","EnglishValue":"3.7","MetricUnit":"mm","MetricValue":"94","Type":"measurement","SpecificationGroup":"Engine","SortOrder":"99"}
Stroke

4.7 in 120 mm
{"Name":"Stroke","SpecificationId":null,"TextValue":null,"EnglishUnit":"in","EnglishValue":"4.7","MetricUnit":"mm","MetricValue":"120","Type":"measurement","SpecificationGroup":"Engine","SortOrder":"99"}
Gross Power - SAE J1995:2014

74.3 hp 55.4 kW
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Rated Net Power - 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269

69.5 hp 51.8 kW
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Hydraulic System

Type

Load Sensing Hydraulics with Variable Displacement Piston Pump
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Operating Pressure - Swing

3626 psi 250 bar
{"Name":"Operating Pressure - Swing","SpecificationId":null,"TextValue":null,"EnglishUnit":"psi","EnglishValue":"3626","MetricUnit":"bar","MetricValue":"250","Type":"measurement","SpecificationGroup":"Hydraulic System","SortOrder":"99"}
Digging Force - Stick - Standard

9500 lb 42.3 kN
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Digging Force - Stick - Long

8023 lb 35.7 kN
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Operating Pressure - Travel

4134 psi 285 bar
{"Name":"Operating Pressure - Travel","SpecificationId":null,"TextValue":null,"EnglishUnit":"psi","EnglishValue":"4134","MetricUnit":"bar","MetricValue":"285","Type":"measurement","SpecificationGroup":"Hydraulic System","SortOrder":"99"}
Pump Flow at 2,400 rpm

62 gal/min 233 l/min
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Digging Force - Bucket

13943 lb 62 kN
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Operating Pressure - Equipment

4134 psi 285 bar
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Note

Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
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Maximum Auxiliary Circuit - Secondary - Flow at Pump

9 gal/min 33 l/min
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Maximum Auxiliary Circuit - Primary - Pressure at Pump

4134 psi 285 bar
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Maximum Auxiliary Circuit - Primary - Flow at Pump

35 gal/min 131 l/min
{"Name":"Maximum Auxiliary Circuit - Primary - Flow at Pump","SpecificationId":null,"TextValue":null,"EnglishUnit":"gal/min","EnglishValue":"35","MetricUnit":"l/min","MetricValue":"131","Type":"measurement","SpecificationGroup":"Hydraulic System","SortOrder":"99"}
Maximum Auxiliary Circuit - Secondary - Pressure at Pump

4134 psi 285 bar
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Maximum Auxiliary Circuit - High Flow - Pressure at Pump

4134 lbf/in 285 bar
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Maximum Auxiliary Circuit - High Flow - Flow at Pump

37 gal/min 140 l/min
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Service Refill Capacities

Engine Oil

3 gal (US) 11.2 l
{"Name":"Engine Oil","SpecificationId":null,"TextValue":null,"EnglishUnit":"gal (US)","EnglishValue":"3","MetricUnit":"l","MetricValue":"11.2","Type":"measurement","SpecificationGroup":"Service Refill Capacities","SortOrder":"99"}
Fuel Tank

39 gal (US) 147 l
{"Name":"Fuel Tank","SpecificationId":null,"TextValue":null,"EnglishUnit":"gal (US)","EnglishValue":"39","MetricUnit":"l","MetricValue":"147","Type":"measurement","SpecificationGroup":"Service Refill Capacities","SortOrder":"99"}
Hydraulic System

29 gal (US) 110 l
{"Name":"Hydraulic System","SpecificationId":null,"TextValue":null,"EnglishUnit":"gal (US)","EnglishValue":"29","MetricUnit":"l","MetricValue":"110","Type":"measurement","SpecificationGroup":"Service Refill Capacities","SortOrder":"99"}
Cooling System

2.6 gal (US) 10 l
{"Name":"Cooling System","SpecificationId":null,"TextValue":null,"EnglishUnit":"gal (US)","EnglishValue":"2.6","MetricUnit":"l","MetricValue":"10","Type":"measurement","SpecificationGroup":"Service Refill Capacities","SortOrder":"99"}
Hydraulic Tank

14 gal (US) 53 l
{"Name":"Hydraulic Tank","SpecificationId":null,"TextValue":null,"EnglishUnit":"gal (US)","EnglishValue":"14","MetricUnit":"l","MetricValue":"53","Type":"measurement","SpecificationGroup":"Service Refill Capacities","SortOrder":"99"}

Sound

Average Exterior Sound Pressure (ISO 6395:2008)

99 dB(A) 99 dB(A)
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Note

European Union Directive "2000/14/EC"
{"Name":"Note","SpecificationId":null,"TextValue":"European Union Directive \"2000/14/EC\"","EnglishUnit":null,"EnglishValue":null,"MetricUnit":null,"MetricValue":null,"Type":"text","SpecificationGroup":"Sound","SortOrder":"99"}
Operator Sound Pressure (ISO 6396:2008)

72 dB(A) 72 dB(A)
{"Name":"Operator Sound Pressure (ISO 6396:2008)","SpecificationId":null,"TextValue":null,"EnglishUnit":"dB(A)","EnglishValue":"72","MetricUnit":"dB(A)","MetricValue":"72","Type":"measurement","SpecificationGroup":"Sound","SortOrder":"99"}

Specifications

Note

The 309 CR specifications are based on a machine configured with a Long (L) Undercarriage.
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Sustainability

Recyclability

96%
{"Name":"Recyclability","SpecificationId":null,"TextValue":"96%","EnglishUnit":null,"EnglishValue":null,"MetricUnit":null,"MetricValue":null,"Type":"text","SpecificationGroup":"Sustainability","SortOrder":"99"}

Swing System

Machine Swing Speed

10.6 r/min 10.6 r/min
{"Name":"Machine Swing Speed","SpecificationId":null,"TextValue":null,"EnglishUnit":"r/min","EnglishValue":"10.6","MetricUnit":"r/min","MetricValue":"10.6","Type":"measurement","SpecificationGroup":"Swing System","SortOrder":"99"}
Boom Swing - Right

50 degrees
{"Name":"Boom Swing - Right","SpecificationId":null,"TextValue":"50 degrees","EnglishUnit":null,"EnglishValue":null,"MetricUnit":null,"MetricValue":null,"Type":"text","SpecificationGroup":"Swing System","SortOrder":"99"}
Boom Swing - Left

60 degrees
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Travel System

Gradeability - Maximum

30 degrees
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Ground Pressure - Minimum Weight

5 psi 34.7 kPa
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Ground Pressure - Maximum Weight

5.4 psi 37.1 kPa
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Travel Speed - High

3.1 mile/h 4.9 km/h
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Travel Speed - Low

1.6 mile/h 2.6 km/h
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Maximum Traction Force - High Speed

6497 lb 28.9 kN
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Maximum Traction Force - Low Speed

19064 lb 84.8 kN
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Weight Increase from Minimum Configuration

Steel Tracks with Pads

728 lb 330 kg
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Long Stick

146 lb 66 kg
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Counterweight

552 lb 250 kg
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Weights

Operating Weight

21091 lb 9565 kg
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Maximum Operating Weight with Cab**

21091 lb 9565 kg
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Note (1)

*Minimum Weight is based on steel tracks, no counterweight, operator, full fuel tank, standard stick, blade and no bucket.
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Note (2)

**Maximum Weight is based on steel tracks with rubber pads, counterweight, operator, full fuel tank, long stick, blade and no bucket.
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Minimum Operating Weight with Cab*

19735 lb 8950 kg
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Benefits

SUSTAINABILITY

The Cat® C3.3B engine meets U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 emission standards.
Cat diesel engines are required to use ULSD (ultra-low sulfur diesel fuel with 15 ppm of sulfur or less) or ULSD blended with the following lower-carbon intensity fuels up to: 20% biodiesel FAME (fatty acid methyl ester) * or 100% renewable diesel, HVO (hydrotreated vegetable oil) and GTL (gas-to-liquid) fuels. Refer to guidelines for successful application. Please consult your Cat dealer or “Caterpillar Machine Fluids Recommendations” (SEBU6250) for details.
Auto Idle helps reduce unnecessary fuel burn and greenhouse gas emissions by allowing the engine to automatically go into idle mode when the machine is not working.
Engine Idle Shutdown Timer reduces fuel burn, greenhouse gas emissions and unnecessary idle time by shutting down the machine after a pre-set idling period.
Cruise control helps you maintain a constant speed as you travel across your jobsite saving fuel and reducing greenhouse gas emissions.
The Cat® Seat Belt Reminder provides audible and visual warnings to remind operators to buckle up during machine operation. The easy-to-install system is compatible with all equipment brands to help ensure operator safety.
Extended maintenance intervals not only reduce downtime but decrease the amount of fluid and filters that are replaced over the life of the machine.
Remote Flash minimizes downtime and maintenance time while keeping your asset running with maximum efficiency. Alerts for machine updates are sent virtually from your Cat dealer and updates can be deployed without a dealer technician needing to be onsite.(if equipped)
Remote Troubleshoot decreases maintenance time and keeps your machine running with maximum efficiency by allowing your Cat dealer to virtually test the machine while working. Once a problem is identified, a technician can fix it the first time, saving time and money.(if equipped)
Cat Grade with advanced 2D and 3D technologies combine advanced guidance with optional automated machine control helping you reach grading targets while reducing fuel burn and greenhouse gas emissions by improving efficiency, job site productivity, and accuracy. (if equipped).

*Engines with no aftertreatment devices can use higher blends, up to 100% biodiesel. (for use of blends higher than 20% biodiesel, consult your Cat dealer)

SIMPLE SERVICE FOR LESS DOWNTIME

SAFETY ON THE JOB SITE

Your safety is our top priority. The Cat Mini Excavator is designed to help keep you safe on the job. A back-up camera, courtesy work lights and a fluorescent retractable seat belt are just a few of the safety features we’ve built into the machine.

HIGH FLOW

Dedicated auxiliary hydraulic pump is ideal for running power-hungry attachments while allowing the machine to simultaneously travel and multifunction. This feature allows consistent pressure to the auxiliary lines with no loss of hydraulic power keeping your attachment running at full power maintaining optimal productivity.

EASY TO OPERATE

Controls are easy to use and the intuitive Next Generation Monitor provides customizable machine operator preferences and easy to read machine information.

ALL DAY COMFORT

A sealed and pressurized cab is equipped with an improved air conditioning system, adjustable wrist rests and a suspension seat to help keep you working comfortably all day long.

SUSTAINABILITY

UNMATCHED DEALER SUPPORT

Your Cat dealer is here to help you reach your business goals. From providing equipment solutions to operator training to service needs and beyond, your Cat dealer is ready to help.

LOWER OPERATING COSTS

Equipped with features such as auto idle, auto engine shutdown, and efficient hydraulics with a variable displacement pump, the Cat Mini Excavator was designed with reducing your operating costs in mind.

SIMPLE SERVICE FOR LESS DOWNTIME

Maintenance is quick and easy on the Cat Mini Excavator. Routine check points are easy to access at ground level with grouped service points and robust service panels.

HIGH FLOW

BIG PERFORMANCE IN A MINI DESIGN

Increased lifting, swinging, travel and multi-functioning performance helps you get the job done more efficiently, blade float allows for easy clean up and long undercarriage provides improved stability.

STICK STEER TRAVEL MODE

Moving around the job site is even easier with the Cat Stick Steer option. Easily switch from traditional travel controls with levers and pedals to joystick controls with a push of a button. The benefit of less effort and improved control is in your hands!