The Cat® 309 CR Mini Excavator delivers maximum power and performance in a mini size to help you work in a wide range of applications.
Net Power
51.8 kW
Note
The 309 CR specifications are based on a machine configured with a Long (L) Undercarriage.
Operating Weight
9565 kg
Product specifications for 309 CR Mini Excavators
Engine
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Net Power
51.8 kW
Displacement
3.33 l
Bore
94 mm
Stroke
120 mm
Gross Power – SAE J1995
55.4 kW
Rated Net Power – 2,200 rpm – U.S. EPA Tier 4 Final/EU Stage V – ISO 9249/EEC 80/1269
51.8 kW
Engine Model
Cat C3.3B
Specifications
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Note
The 309 CR specifications are based on a machine configured with a Long (L) Undercarriage.
Weights
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Operating Weight
9565 kg
Maximum Operating Weight with Cab**
9565 kg
Note (1)
*Minimum Weight is based on steel tracks, no counterweight, operator, full fuel tank, standard stick, blade and no bucket.
Note (2)
**Maximum Weight is based on steel tracks with rubber pads, counterweight, operator, full fuel tank, long stick, blade and no bucket.
Minimum Operating Weight with Cab*
8950 kg
Dimensions – Long Stick
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Dig Depth
4642 mm
Maximum Dump Clearance
5072 mm
Boom In Reach
3215 mm
Vertical Wall
3404 mm
Maximum Blade Depth
671 mm
O/A Undercarriage Length
3200 mm
O/A Track Width
2470 mm
Stick Length
2358 mm
Maximum Blade Height
408 mm
Maximum Dig Height
7039 mm
Tail Swing with Counterweight
1585 mm
Maximum Reach
7637 mm
Cab Height
2541 mm
Ground Clearance
356 mm
Swing Bearing – Height
756 mm
Track Belt/Shoe Width
450 mm
Boom Swing – Left
604 mm
Boom Swing – Right
935 mm
Tail Swing without Counterweight
1450 mm
Maximum Reach – Ground Level
7460 mm
Note
*Boom Height when stick is pinned in transport position with no attachments.
Note (2)
***With blade positioned at the rear of the machine.
Note (1)
**Boom Height when stick is pinned in working position with attachments Standard Stick offers only one pin position.
Height – Boom Transport – No Tools*
2260 mm
Overall Shipping Length – with Counterweight
7052 mm (277.6 in)***
Height – Boom Working – With Tools**
3050 mm
Overall Shipping Length – without Counterweight
7052 mm (277.6 in)***
Weight Increase from Minimum Configuration
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Steel Tracks with Pads
330 kg
Long Stick
66 kg
Counterweight
250 kg
Travel System
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Gradeability – Maximum
30 degrees
Ground Pressure – Minimum Weight
34.7 kPa
Ground Pressure – Maximum Weight
37.1 kPa
Travel Speed – High
4.9 km/h
Travel Speed – Low
2.6 km/h
Maximum Traction Force – High Speed
28.9 kN
Maximum Traction Force – Low Speed
84.8 kN
Service Refill Capacities
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Engine Oil
11.2 l
Fuel Tank
147 l
Hydraulic System
110 l
Cooling System
10 l
Hydraulic Tank
53 l
Hydraulic System
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Type
Load Sensing Hydraulics with Variable Displacement Piston Pump
Operating Pressure – Swing
250 bar
Digging Force – Stick – Standard
42.3 kN
Digging Force – Stick – Long
35.7 kN
Operating Pressure – Travel
285 bar
Pump Flow at 2,400 rpm
233 l/min
Digging Force – Bucket
62 kN
Operating Pressure – Equipment
285 bar
Note
Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Maximum Auxiliary Circuit – Secondary – Flow at Pump
33 l/min
Maximum Auxiliary Circuit – Primary – Pressure at Pump
285 bar
Maximum Auxiliary Circuit – Primary – Flow at Pump
131 l/min
Maximum Auxiliary Circuit – Secondary – Pressure at Pump
285 bar
Maximum Auxiliary Circuit – High Flow – Pressure at Pump
285 bar
Maximum Auxiliary Circuit – High Flow – Flow at Pump
140 l/min
Swing System
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Machine Swing Speed
10.6 r/min
Boom Swing – Right
50 degrees
Boom Swing – Left
60 degrees
Blade
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Height
431 mm
Width – Wide
2640 mm
Width – Standard
2470 mm
Certification – Cab
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Roll Over Protective Structure (ROPS)
ISO 12117-2:2008
Top Guard
ISO 10262:1998 (Level I)
Tip Over Protective Structure (TOPS)
ISO 12117:1997
Sound
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Average Exterior Sound Pressure (ISO 6395:2008)
99 dB(A)
Note
European Union Directive “2000/14/EC”
Operator Sound Pressure (ISO 6396:2008)
72 dB(A)
Dimensions – Standard Stick
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Boom Swing – Right
935 mm
Maximum Dump Clearance
4760 mm
Tail Swing without Counterweight
1450 mm
Maximum Reach – Ground Level
6949 mm
O/A Undercarriage Length
3200 mm
Cab Height
2541 mm
Swing Bearing – Height
756 mm
Maximum Dig Height
6736 mm
Track Belt/Shoe Width
450 mm
O/A Track Width
2470 mm
Ground Clearance
356 mm
Maximum Reach
7141 mm
Tail Swing with Counterweight
1585 mm
Boom In Reach
3059 mm
Vertical Wall
2991 mm
Dig Depth
4108 mm
Stick Length
1820 mm
Boom Swing – Left
604 mm
Maximum Blade Height
408 mm
Maximum Blade Depth
671 mm
Note
*Boom Height when stick is pinned in transport position with no attachments.
Overall Shipping Length – without Counterweight
6774 mm
Overall Shipping Length – with Counterweight
6774 mm
Note (2)
***With blade positioned at the rear of the machine.
Note (1)
**Boom Height when stick is pinned in working position with attachments Standard Stick offers only one pin position.
Height – Boom Transport – No Tools*
2430 mm
Height – Boom Working – With Tools**
2660 mm
Air Conditioning System
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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.
Sustainability
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Recyclability
96%
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.
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.
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!
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.
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.
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.
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.
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.
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.
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)
309 CR Standard Equipment
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ENGINE
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Cat C3.3B Diesel Engine (U.S. EPA Tier 4 Final/EU Stage V) – Electronic Engine, Turbo, Diesel Particulate Filter (DPF)
Automatic Engine Idle
Automatic Engine Shutdown
Automatic Swing Brake
Automatic Two Speed Travel
Fuel Water Separator with Indicator
Radial Seal – Double Element Air Filter
Extended Life Coolant, –37° C (–35° F)
HYDRAULICS
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Electronic Variable Displacement Piston Pump
Load Sensing/Flow Sharing Hydraulics
Dedicated Auxiliary Hydraulic Pump
Power On Demand
Hydraulic Temperature Monitoring
Certified Accumulator
HYDO Advanced Hydraulic Oil
Ecology Drain
OPERATOR ENVIRONMENT
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Top Guard ISO 10262 1998 Level I
ROPS ISO 12117-2:2008
Stick Steer Mode
Travel Cruise Control
Control Pattern Changer
Adjustable Wrist Rests
Molded Footrests
Removable, Washable Floor Mat
Travel Pedals and Hand Levers
Cat Key with Passcode Option
HVAC with Automatic Temperature Control
Hydraulic Lockout Controls
Integrated Lower Front Window
Assisted Front Window Overhead Storage
Rear Window Emergency Exit
Fabric, High Back, Suspension Seat
Retractable Seat Belt (75 mm/3 in)
Coat Hook
Cup Holder
LED Interior Light
Literature Holder
Mounting Bosses for Top and Front Guards
12V Power Socket
Radio – Bluetooth, Auxiliary, Microphone, USB (charging only)
Skylight
Signaling/Warning Horn
Cab and (left side) Boom Work Lights
Utility Space for Mobile Phone
Next Generation Color LCD Monitor (IP66)
– Jog Dial Interface
– Fuel Level and Coolant Temperature Gauges
– Maintenance and Machine Monitoring
– Performance and Machine Adjustments
– Numeric Security Code
– Multiple Languages
– Camera Ready (IP68 & IP69K)
– Hour Meter with Wake Up Switch
UNDERCARRIAGE
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Greased and Lubricated Track
Tie Down Eyes on Track Frame
Dozer Blade
Dozer Float
Bolt-on, Reversible Wear Edge
BOOM, STICK AND LINKAGES
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One Piece Boom (3400 mm/133.9 in)
Standard Stick (1820 mm/71.7 in)
Front Shovel Capable – Pin-on/Manual Coupler/Hydraulic Coupler (not available in all regions)
Thumb Ready (not available in all regions)
ELECTRICAL
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12 Volt Electrical System
60 Ampere Alternator
Circuit Breaker
900 CCA Maintenance Free Battery
Battery Disconnect
Ignition Key Stop Switch
Travel Alarm
OTHER
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Locks on External Enclosure Doors
Lockable Fuel Cap
Beacon Socket
Rear Reflectors
309 CR Optional Equipment
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OPERATOR ENVIRONMENT
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Push to Start with Bluetooth® Key
Air Suspension Heated Seat
Rain Visor
Next Generation Advanced Monitor (below are all included with Next Generation Advanced Monitor option)
– Touch Screen
– Site Reference System
– High Definition Camera Capable (IP68 & IP69K)
– Numeric Security Code
UNDERCARRIAGE
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Wide Dozer Blade
Steel Tracks (450 mm/17.7 in wide)
Wide Steel Tracks (600 mm/23.6 in)
Steel Track with Rubber Pads
Track Guides
BOOM, STICK AND LINKAGES
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Long Stick (2360 mm/92.9 in)
Attachments including Buckets, Augers and Hammers
2nd Auxiliary Hydraulic Lines with Case Drain
Boom Lowering Check Valve
Stick Lowering Check Valve
Certified Lifting Eye
ELECTRICAL
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Product Link™ Elite (regulations apply)
Rearview Camera
Rotating Beacon
GUARDING
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Mesh Front Guard ISO 10262 1998 Level I
Heavy Duty Front Guard ISO 10262 1998 Level II
Top Guard ISO 10262 1998 Level II
Polycarbonate Front Window EN356 P5A (Cab Only)
Track Guards
OTHER
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Additional Counterweight
Water Jacket Heater
Refueling Pump
Variable Angle Boom (refer to 309 CR VAB brochure for VAB specs and additional information)
