309 CR
309 CR Mini Hydraulic Excavator
The 309 CR Mini Excavator delivers maximum power and performance in a mini size to help you work in a wide range of applications. The 309 CR also features high flow hydraulics to handle power hungry attachments such as mulchers and brushcutters.
DESCRIPTION
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.The 309 CR also features high flow hydraulics to handle power hungry attachments such as mulchers and brushcutters.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.See the new Cat 7-10 Ton Mini Excavators in action.
Learn about the features and benefits of the new Cat 7-10 Ton Mini Excavators.
Easy to read monitor lets you adjust machine settings to your operating preference.
Easily switch from traditional travel controls with levers and pedals to joystick controls with a push of a button.
Hear how Webb Excavating in Tennessee uses their Cat 309 CR Mini Excavator to help their business succeed.
Learn about the recommended Daily Maintenance and Inspection for the Cat 7 to 10 Ton Mini Excavators in this quick video.
Learn about the Safety Features on the Cat 7 to 10 Ton Mini Excavators in this quick video.
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).
- Standard Equipment
- Optional Equipment
- Specs
- Docs
Standard Equipment
- ENGINE
- 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
- 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
- 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
- Greased and Lubricated Track
- Tie Down Eyes on Track Frame
- Dozer Blade
- Dozer Float
- Bolt-on, Reversible Wear Edge
- BOOM, STICK AND LINKAGES
- 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
- 12 Volt Electrical System
- 60 Ampere Alternator
- Circuit Breaker
- 900 CCA Maintenance Free Battery
- Battery Disconnect
- Ignition Key Stop Switch
- Travel Alarm
- OTHER
- Locks on External Enclosure Doors
- Lockable Fuel Cap
- Beacon Socket
- Rear Reflectors
Optional Equipment
- OPERATOR ENVIRONMENT
- 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
- 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
- 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
- Product Link™ Elite (regulations apply)
- Rearview Camera
- Rotating Beacon
- GUARDING
- 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
- Additional Counterweight
- Water Jacket Heater
- Refueling Pump
- Variable Angle Boom (refer to 309 CR VAB brochure for VAB specs and additional information)
Specs
Overview
Long Name:
309 CR Mini Hydraulic Excavator
Name:
309 CR
Brand:
Caterpillar
Status:
Current
Engine
Net Power
69.5 hp / 51.8 kW
Specifications
Note
The 309 CR specifications are based on a machine configured with a Long (L) Undercarriage.
Weights
Operating Weight
21091 lb / 9565 kg
Engine
Displacement
203 in³ / 3.33 l
Bore
3.7 in / 94 mm
Stroke
4.7 in / 120 mm
Gross Power - SAE J1995
74.3 hp / 55.4 kW
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
Dimensions - Long Stick
Dig Depth
182.8 in / 4642 mm
Weights
Maximum Operating Weight with Cab**
21091 lb / 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*
19735 lb / 8950 kg
Weight Increase from Minimum Configuration
Steel Tracks with Pads
728 lb / 330 kg
Long Stick
146 lb / 66 kg
Counterweight
552 lb / 250 kg
Travel System
Gradeability - Maximum
30 degrees
Ground Pressure - Minimum Weight
5 psi / 34.7 kPa
Ground Pressure - Maximum Weight
5.4 psi / 37.1 kPa
Travel Speed - High
3.1 mile/h / 4.9 km/h
Travel Speed - Low
1.6 mile/h / 2.6 km/h
Maximum Traction Force - High Speed
6497 lb / 28.9 kN
Maximum Traction Force - Low Speed
19064 lb / 84.8 kN
Service Refill Capacities
Engine Oil
3 gal (US) / 11.2 l
Fuel Tank
39 gal (US) / 147 l
Hydraulic System
29 gal (US) / 110 l
Cooling System
2.6 gal (US) / 10 l
Hydraulic Tank
14 gal (US) / 53 l
Hydraulic System
Type
Load Sensing Hydraulics with Variable Displacement Piston Pump
Operating Pressure - Swing
3626 psi / 250 bar
Digging Force - Stick - Standard
9500 lb / 42.3 kN
Digging Force - Stick - Long
8023 lb / 35.7 kN
Operating Pressure - Travel
4134 psi / 285 bar
Pump Flow at 2,400 rpm
62 gal/min / 233 l/min
Digging Force - Bucket
13943 lb / 62 kN
Operating Pressure - Equipment
4134 psi / 285 bar
Note
Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Maximum Auxiliary Circuit - Secondary - Flow at Pump
9 gal/min / 33 l/min
Maximum Auxiliary Circuit - Primary - Pressure at Pump
4134 psi / 285 bar
Maximum Auxiliary Circuit - Primary - Flow at Pump
35 gal/min / 131 l/min
Maximum Auxiliary Circuit - Secondary - Pressure at Pump
4134 psi / 285 bar
Maximum Auxiliary Circuit - High Flow - Pressure at Pump
4134 lbf/in / 285 bar
Maximum Auxiliary Circuit - High Flow - Flow at Pump
37 gal/min / 140 l/min
Engine
Engine Model
Cat C3.3B
Swing System
Machine Swing Speed
10.6 r/min / 10.6 r/min
Boom Swing - Right
50 degrees
Boom Swing - Left
60 degrees
Blade
Height
17 in / 431 mm
Width - Wide
104 in / 2640 mm
Width - Standard
97 in / 2470 mm
Certification - Cab
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
Average Exterior Sound Pressure (ISO 6395:2008)
99 dB(A) / 99 dB(A)
Note
European Union Directive "2000/14/EC"
Operator Sound Pressure (ISO 6396:2008)
72 dB(A) / 72 dB(A)
Dimensions - Standard Stick
Boom Swing - Right
36.8 in / 935 mm
Maximum Dump Clearance
187.4 in / 4760 mm
Tail Swing without Counterweight
57.1 in / 1450 mm
Maximum Reach - Ground Level
273.6 in / 6949 mm
O/A Undercarriage Length
126 in / 3200 mm
Cab Height
100 in / 2541 mm
Swing Bearing - Height
29.7 in / 756 mm
Maximum Dig Height
265.2 in / 6736 mm
Track Belt/Shoe Width
17.7 in / 450 mm
O/A Track Width
97.2 in / 2470 mm
Ground Clearance
14 in / 356 mm
Maximum Reach
281.1 in / 7141 mm
Tail Swing with Counterweight
62.4 in / 1585 mm
Boom In Reach
120.4 in / 3059 mm
Vertical Wall
117.8 in / 2991 mm
Dig Depth
161.7 in / 4108 mm
Stick Length
71.8 in / 1820 mm
Boom Swing - Left
23.8 in / 604 mm
Maximum Blade Height
16.1 in / 408 mm
Maximum Blade Depth
26 in / 671 mm
Note
*Boom Height when stick is pinned in transport position with no attachments.
Overall Shipping Length - without Counterweight
266.7 in / 6774 mm
Overall Shipping Length - with Counterweight
266.7 in / 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*
95.7 in / 2430 mm
Height - Boom Working - With Tools**
104.7 in / 2660 mm
Dimensions - Long Stick
Maximum Dump Clearance
199.7 in / 5072 mm
Boom In Reach
126.6 in / 3215 mm
Vertical Wall
134 in / 3404 mm
Maximum Blade Depth
26 in / 671 mm
O/A Undercarriage Length
126 in / 3200 mm
O/A Track Width
97.2 in / 2470 mm
Stick Length
92.8 in / 2358 mm
Maximum Blade Height
16.1 in / 408 mm
Maximum Dig Height
277.1 in / 7039 mm
Tail Swing with Counterweight
62.4 in / 1585 mm
Maximum Reach
300.7 in / 7637 mm
Cab Height
100 in / 2541 mm
Ground Clearance
14 in / 356 mm
Swing Bearing - Height
29.7 in / 756 mm
Track Belt/Shoe Width
17.7 in / 450 mm
Boom Swing - Left
23.8 in / 604 mm
Boom Swing - Right
36.8 in / 935 mm
Tail Swing without Counterweight
57.1 in / 1450 mm
Maximum Reach - Ground Level
293.7 in / 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*
89 in / 2260 mm
Overall Shipping Length - with Counterweight
7052 mm (277.6 in)***
Height - Boom Working - With Tools**
120.1 in / 3050 mm
Overall Shipping Length - without Counterweight
7052 mm (277.6 in)***
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.
Sustainability
Recyclability
96%
- 309 CR Long Undercarriage Product Brochure (pdf)
- 309 CR Standard Undercarriage Product Brochure (Europe and ANZP) (pdf)
- Cat Mini Hydraulic Excavators Product Line Brochure (North America) (pdf)
- Cat Mini Hydraulic Excavators Product Line Brochure (Europe) (pdf)
- Options And Accessories Kit Guide for Mini Hydraulic Excavators (pdf)
- Cat Attachments for Mini Excavators Brochure (pdf)
- Attachment Compatibility Guide for Mini Excavators (pdf)
SEE HOW 309 CR COMPARES AGAINST FREQUENTLY COMPARED PRODUCTS.
Mini Excavators
309 CR
- Brand
- Caterpillar
- Status
- Current
- Net Power
- 69.5 hp / 51.8 kW
- Note
- *Boom Height when stick is pinned in transport position with no attachments.
- Operating Weight
- 21091 lb / 9565 kg
- Displacement
- 203 in³ / 3.33 l
- Bore
- 3.7 in / 94 mm
- Stroke
- 4.7 in / 120 mm
- Gross Power - SAE J1995
- 74.3 hp / 55.4 kW
- Dig Depth
- 161.7 in / 4108 mm
- Note (1)
- **Boom Height when stick is pinned in working position with attachments Standard Stick offers only one pin position.
- Note (2)
- ***With blade positioned at the rear of the machine.
- Steel Tracks with Pads
- 728 lb / 330 kg
- Counterweight
- 552 lb / 250 kg
- Gradeability - Maximum
- 30 degrees
- Ground Pressure - Minimum Weight
- 5 psi / 34.7 kPa
- Ground Pressure - Maximum Weight
- 5.4 psi / 37.1 kPa
- Travel Speed - High
- 3.1 mile/h / 4.9 km/h
- Travel Speed - Low
- 1.6 mile/h / 2.6 km/h
- Maximum Traction Force - High Speed
- 6497 lb / 28.9 kN
- Maximum Traction Force - Low Speed
- 19064 lb / 84.8 kN
- Engine Oil
- 3 gal (US) / 11.2 l
- Fuel Tank
- 39 gal (US) / 147 l
- Hydraulic System
- 29 gal (US) / 110 l
- Cooling System
- 2.6 gal (US) / 10 l
- Hydraulic Tank
- 14 gal (US) / 53 l
- Type
- Load Sensing Hydraulics with Variable Displacement Piston Pump
- Operating Pressure - Swing
- 3626 psi / 250 bar
- Digging Force - Stick - Standard
- 9500 lb / 42.3 kN
- Operating Pressure - Travel
- 4134 psi / 285 bar
- Pump Flow at 2,400 rpm
- 62 gal/min / 233 l/min
- Digging Force - Bucket
- 13943 lb / 62 kN
- Operating Pressure - Equipment
- 4134 psi / 285 bar
- Maximum Auxiliary Circuit - Secondary - Flow at Pump
- 9 gal/min / 33 l/min
- Maximum Auxiliary Circuit - Primary - Pressure at Pump
- 4134 psi / 285 bar
- Maximum Auxiliary Circuit - Primary - Flow at Pump
- 35 gal/min / 131 l/min
- Maximum Auxiliary Circuit - Secondary - Pressure at Pump
- 4134 psi / 285 bar
- Machine Swing Speed
- 10.6 r/min / 10.6 r/min
- Boom Swing - Right
- 36.8 in / 935 mm
- Boom Swing - Left
- 23.8 in / 604 mm
- Height
- 17 in / 431 mm
- Width - Wide
- 104 in / 2640 mm
- Width - Standard
- 97 in / 2470 mm
- Roll Over Protective Structure (ROPS)
- ISO 12117-2:2008
- Top Guard
- ISO 10262:1998 (Level I)
- Tip Over Protective Structure (TOPS)
- ISO 12117:1997
- Average Exterior Sound Pressure (ISO 6395:2008)
- 99 dB(A) / 99 dB(A)
- Operator Sound Pressure (ISO 6396:2008)
- 72 dB(A) / 72 dB(A)
- Maximum Dump Clearance
- 199.7 in / 5072 mm
- Tail Swing without Counterweight
- 57.1 in / 1450 mm
- Cab Height
- 100 in / 2541 mm
- Maximum Dig Height
- 277.1 in / 7039 mm
- Track Belt/Shoe Width
- 17.7 in / 450 mm
- Ground Clearance
- 14 in / 356 mm
- Maximum Reach
- 300.7 in / 7637 mm
- Tail Swing with Counterweight
- 62.4 in / 1585 mm
- Vertical Wall
- 134 in / 3404 mm
- Stick Length
- 92.8 in / 2358 mm
- Maximum Blade Height
- 16.1 in / 408 mm
- Maximum Blade Depth
- 26 in / 671 mm
- 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.
- Recyclability
- 96%
Selected Model
Mini Excavators
308 CR VAB
- Brand
- Caterpillar
- Status
- Current
- Net Power
- 69.5 hp / 51.8 kW
- Note
- European Union Directive "2000/14/EC"
- Operating Weight
- 20385 lb / 9245 kg
- Displacement
- 203 in³ / 3.33 l
- Bore
- 3.7 in / 94 mm
- Stroke
- 4.7 in / 120 mm
- Gross Power - SAE J1995
- 74.3 hp / 55.4 kW
- Dig Depth
- 136.2 in / 3460 mm
- Note (1)
- *Minimum Weight is based on rubber tracks, no counterweight, operator, full fuel tank, blade, and no bucket.
- Note (2)
- **Maximum Weight is based on steel tracks with rubber pads, counterweight, operator, full fuel tank, blade, and no bucket.
- Steel Tracks with Pads
- 752 lb / 341 kg
- Counterweight
- 552 lb / 250 kg
- Gradeability - Maximum
- 30 degrees
- Ground Pressure - Minimum Weight
- 5.5 psi / 37.9 kPa
- Ground Pressure - Maximum Weight
- 5.9 psi / 40.6 kPa
- Travel Speed - High
- 3.2 mile/h / 5.1 km/h
- Travel Speed - Low
- 1.9 mile/h / 3.1 km/h
- Maximum Traction Force - High Speed
- 6250 lbf / 27.8 kN
- Maximum Traction Force - Low Speed
- 15175 lbf / 67.5 kN
- Engine Oil
- 3 gal (US) / 11.2 l
- Fuel Tank
- 39 gal (US) / 147 l
- Hydraulic System
- 29 gal (US) / 110 l
- Cooling System
- 2.6 gal (US) / 10 l
- Hydraulic Tank
- 14 gal (US) / 53 l
- Type
- Load Sensing Hydraulics with Variable Displacement Piston Pump
- Operating Pressure - Swing
- 3626 psi / 250 bar
- Digging Force - Stick - Standard
- 9509 lbf / 42.3 kN
- Operating Pressure - Travel
- 4134 psi / 285 bar
- Pump Flow at 2,400 rpm
- 44 gal/min / 167 l/min
- Digging Force - Bucket
- 13946 lbf / 62 kN
- Operating Pressure - Equipment
- 4134 psi / 285 bar
- Maximum Auxiliary Circuit - Secondary - Flow at Pump
- 9 gal/min / 33 l/min
- Maximum Auxiliary Circuit - Primary - Pressure at Pump
- 4134 psi / 285 bar
- Maximum Auxiliary Circuit - Primary - Flow at Pump
- 35 gal/min / 131 l/min
- Maximum Auxiliary Circuit - Secondary - Pressure at Pump
- 4134 psi / 285 bar
- Machine Swing Speed
- 10.6 r/min / 10.6 r/min
- Boom Swing - Right
- 50 degrees
- Boom Swing - Left
- 60 degrees
- Height
- 17 in / 431 mm
- Width - Wide
- 96.5 in / 2450 mm
- Width - Standard
- 90.6 in / 2300 mm
- Roll Over Protective Structure (ROPS)
- ISO 12117-2:2008
- Top Guard
- ISO 10262:1998 (Level II)
- Tip Over Protective Structure (TOPS)
- ISO 12117:1997
- Average Exterior Sound Pressure (ISO 6395:2008)
- 99 dB(A) / 99 dB(A)
- Operator Sound Pressure (ISO 6396:2008)
- 72 dB(A) / 72 dB(A)
- Maximum Dump Clearance
- 247.4 in / 6285 mm
- Tail Swing without Counterweight
- 57.1 in / 1450 mm
- Cab Height
- 100 in / 2541 mm
- Maximum Dig Height
- 322 in / 8180 mm
- Track Belt/Shoe Width
- 17.7 in / 450 mm
- Ground Clearance
- 13.8 in / 350 mm
- Maximum Reach
- 310.4 in / 7885 mm
- Tail Swing with Counterweight
- 62.4 in / 1585 mm
- Vertical Wall
- 146.7 in / 3725 mm
- Stick Length
- 71.7 in / 1820 mm
- Maximum Blade Height
- 14.6 in / 370 mm
- Maximum Blade Depth
- 16 in / 407 mm
- 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.
- Recyclability
- 96%
Mini Excavators
309 CR VAB (Long Undercarriage)
- Brand
- Caterpillar
- Status
- Current
- Net Power
- 69.5 hp / 51.8 kW
- Note
- Net power advertised is the power available at the flywheel when the engine is equipped with air cleaner, exhaust system and fan.
- Operating Weight
- 21477 lb / 9740 kg
- Displacement
- 203 in³ / 3.33 l
- Bore
- 3.7 in / 94 mm
- Stroke
- 4.7 in / 120 mm
- Gross Power - SAE J1995
- 74.3 hp / 55.4 kW
- Dig Depth
- 136.2 in / 3460 mm
- Note (1)
- *Minimum Weight is based on rubber 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, standard stick, blade and no bucket.
- Steel Tracks with Pads
- 728 lb / 330 kg
- Counterweight
- 552 lb / 250 kg
- Gradeability - Maximum
- 30 degrees
- Ground Pressure - Minimum Weight
- 5.1 psi / 35.4 kPa
- Ground Pressure - Maximum Weight
- 5.5 psi / 37.8 kPa
- Travel Speed - High
- 3.1 mile/h / 4.9 km/h
- Travel Speed - Low
- 1.6 mile/h / 2.6 km/h
- Maximum Traction Force - High Speed
- 6497 lbf / 28.9 kN
- Maximum Traction Force - Low Speed
- 19064 lbf / 84.8 kN
- Engine Oil
- 3 gal (US) / 11.2 l
- Fuel Tank
- 39 gal (US) / 147 l
- Hydraulic System
- 29 gal (US) / 110 l
- Cooling System
- 2.6 gal (US) / 10 l
- Hydraulic Tank
- 14 gal (US) / 53 l
- Type
- Load Sensing Hydraulics with Variable Displacement Piston Pump
- Operating Pressure - Swing
- 3626 psi / 250 bar
- Digging Force - Stick - Standard
- 9509 lbf / 42.3 kN
- Operating Pressure - Travel
- 4134 psi / 285 bar
- Pump Flow at 2,400 rpm
- 62 gal/min / 233 l/min
- Digging Force - Bucket
- 13946 lbf / 62 kN
- Operating Pressure - Equipment
- 4134 psi / 285 bar
- Maximum Auxiliary Circuit - Secondary - Flow at Pump
- 9 gal/min / 33 l/min
- Maximum Auxiliary Circuit - Primary - Pressure at Pump
- 4134 psi / 285 bar
- Maximum Auxiliary Circuit - Primary - Flow at Pump
- 35 gal/min / 131 l/min
- Maximum Auxiliary Circuit - Secondary - Pressure at Pump
- 4134 psi / 285 bar
- Machine Swing Speed
- 10.6 r/min / 10.6 r/min
- Boom Swing - Right
- 50 degrees
- Boom Swing - Left
- 60 degrees
- Height
- 17 in / 431 mm
- Width - Wide
- 103.9 in / 2640 mm
- Width - Standard
- 97.2 in / 2470 mm
- Roll Over Protective Structure (ROPS)
- ISO 12117-2:2008
- Top Guard
- ISO 10262:1998 (Level II)
- Tip Over Protective Structure (TOPS)
- ISO 12117:1997
- Average Exterior Sound Pressure (ISO 6395:2008)
- 99 dB(A) / 99 dB(A)
- Operator Sound Pressure (ISO 6396:2008)
- 72 dB(A) / 72 dB(A)
- Maximum Dump Clearance
- 247.4 in / 6285 mm
- Tail Swing without Counterweight
- 57.1 in / 1450 mm
- Cab Height
- 100 in / 2541 mm
- Maximum Dig Height
- 322 in / 8180 mm
- Track Belt/Shoe Width
- 17.7 in / 450 mm
- Ground Clearance
- 14 in / 356 mm
- Maximum Reach
- 310.4 in / 7885 mm
- Tail Swing with Counterweight
- 62.4 in / 1585 mm
- Vertical Wall
- 146.7 in / 3725 mm
- Stick Length
- 71.7 in / 1820 mm
- Maximum Blade Height
- 16.1 in / 408 mm
- Maximum Blade Depth
- 19.1 in / 484 mm
- 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.
- Recyclability
- 96%