309 CR

309 CR Mini Hydraulic Excavator

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.

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)

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

Additional information

Offering Type

Engine - Net Power

51.8 kW ( 69.5 HP )

Weights - Operating Weight

9565 kg ( 21091 lb )

Engine - Displacement

3.33 l ( 203 in³ )

Engine - Bore

94 mm ( 3.7 in )

Engine - Stroke

120 mm ( 4.7 in )

Engine - Gross Power - SAE J1995

55.4 kW ( 74.3 HP )

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

51.8 kW ( 69.5 HP )

Dimensions - Long Stick - Dig Depth

4642 mm ( 182.8 in )

Weights - Maximum Operating Weight with Cab**

9565 kg ( 21091 lb )

Weights - Minimum Operating Weight with Cab*

8950 kg ( 19735 lb )

Weight Increase from Minimum Configuration - Steel Tracks with Pads

330 kg ( 728 lb )

Weight Increase from Minimum Configuration - Long Stick

66 kg ( 146 lb )

Weight Increase from Minimum Configuration - Counterweight

250 kg ( 552 lb )

Travel System - Gradeability - Maximum

30 degrees

Travel System - Ground Pressure - Minimum Weight

34.7 kPa ( 5 psi )

Travel System - Ground Pressure - Maximum Weight

37.1 kPa ( 5.4 psi )

Travel System - Travel Speed - High

4.9 km/h ( 3.1 mile/h )

Travel System - Travel Speed - Low

2.6 km/h ( 1.6 mile/h )

Travel System - Maximum Traction Force - High Speed

28.9 kN ( 6497 lb )

Travel System - Maximum Traction Force - Low Speed

84.8 kN ( 19064 lb )

Service Refill Capacities - Engine Oil

11.2 l ( 3 gal (US) )

Service Refill Capacities - Fuel Tank

147 l ( 39 gal (US) )

Service Refill Capacities - Hydraulic System

110 l ( 29 gal (US) )

Service Refill Capacities - Cooling System

10 l ( 2.6 gal (US) )

Service Refill Capacities - Hydraulic Tank

53 l ( 14 gal (US) )

Hydraulic System - Type

Load Sensing Hydraulics with Variable Displacement Piston Pump

Hydraulic System - Operating Pressure - Swing

250 bar ( 3626 psi )

Hydraulic System - Digging Force - Stick - Standard

42.3 kN ( 9500 lb )

Hydraulic System - Digging Force - Stick - Long

35.7 kN ( 8023 lb )

Hydraulic System - Operating Pressure - Travel

285 bar ( 4134 psi )

Hydraulic System - Pump Flow at 2,400 rpm

233 l/min ( 62 gal/min )

Hydraulic System - Digging Force - Bucket

62 kN ( 13943 lb )

Hydraulic System - Operating Pressure - Equipment

285 bar ( 4134 psi )

Hydraulic System - Maximum Auxiliary Circuit - Secondary - Flow at Pump

33 l/min ( 9 gal/min )

Hydraulic System - Maximum Auxiliary Circuit - Primary - Pressure at Pump

285 bar ( 4134 psi )

Hydraulic System - Maximum Auxiliary Circuit - Primary - Flow at Pump

131 l/min ( 35 gal/min )

Hydraulic System - Maximum Auxiliary Circuit - Secondary - Pressure at Pump

285 bar ( 4134 psi )

Engine Model

Cat C3.3B

Swing System - Machine Swing Speed

10.6 r/min ( 10.6 r/min )

Swing System - Boom Swing - Right

50 degrees

Swing System - Boom Swing - Left

60 degrees

Blade - Height

431 mm ( 17 in )

Blade - Width - Wide

2640 mm ( 104 in )

Blade - Width - Standard

2470 mm ( 97 in )

Certification - Cab - Roll Over Protective Structure (ROPS)

ISO 12117-2:2008

Certification - Cab - Top Guard

ISO 10262:1998 (Level I)

Certification - Cab - 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) )

Dimensions - Standard Stick - Boom Swing - Right

935 mm ( 36.8 in )

Dimensions - Standard Stick - Maximum Dump Clearance

4760 mm ( 187.4 in )

Dimensions - Standard Stick - Tail Swing without Counterweight

1450 mm ( 57.1 in )

Dimensions - Standard Stick - Maximum Reach - Ground Level

6949 mm ( 273.6 in )

Dimensions - Standard Stick - O/A Undercarriage Length

3200 mm ( 126 in )

Dimensions - Standard Stick - Cab Height

2541 mm ( 100 in )

Dimensions - Standard Stick - Swing Bearing - Height

756 mm ( 29.7 in )

Dimensions - Standard Stick - Maximum Dig Height

6736 mm ( 265.2 in )

Dimensions - Standard Stick - Track Belt/Shoe Width

450 mm ( 17.7 in )

Dimensions - Standard Stick - O/A Track Width

2470 mm ( 97.2 in )

Dimensions - Standard Stick - Ground Clearance

356 mm ( 14 in )

Dimensions - Standard Stick - Maximum Reach

7141 mm ( 281.1 in )

Dimensions - Standard Stick - Tail Swing with Counterweight

1585 mm ( 62.4 in )

Dimensions - Standard Stick - Boom In Reach

3059 mm ( 120.4 in )

Dimensions - Standard Stick - Vertical Wall

2991 mm ( 117.8 in )

Dimensions - Standard Stick - Dig Depth

4108 mm ( 161.7 in )

Dimensions - Standard Stick - Stick Length

1820 mm ( 71.8 in )

Dimensions - Standard Stick - Boom Swing - Left

604 mm ( 23.8 in )

Dimensions - Standard Stick - Maximum Blade Height

408 mm ( 16.1 in )

Dimensions - Standard Stick - Maximum Blade Depth

671 mm ( 26 in )

Dimensions - Standard Stick - Overall Shipping Length - without Counterweight

6774 mm ( 266.7 in )

Dimensions - Standard Stick - Overall Shipping Length - with Counterweight

6774 mm ( 266.7 in )

Dimensions - Standard Stick - Height - Boom Transport - No Tools*

2430 mm ( 95.7 in )

Dimensions - Standard Stick - Height - Boom Working - With Tools**

2660 mm ( 104.7 in )

Dimensions - Long Stick - Maximum Dump Clearance

5072 mm ( 199.7 in )

Dimensions - Long Stick - Boom In Reach

3215 mm ( 126.6 in )

Dimensions - Long Stick - Vertical Wall

3404 mm ( 134 in )

Dimensions - Long Stick - Maximum Blade Depth

671 mm ( 26 in )

Dimensions - Long Stick - O/A Undercarriage Length

3200 mm ( 126 in )

Dimensions - Long Stick - O/A Track Width

2470 mm ( 97.2 in )

Dimensions - Long Stick - Stick Length

2358 mm ( 92.8 in )

Dimensions - Long Stick - Maximum Blade Height

408 mm ( 16.1 in )

Dimensions - Long Stick - Maximum Dig Height

7039 mm ( 277.1 in )

Dimensions - Long Stick - Tail Swing with Counterweight

1585 mm ( 62.4 in )

Dimensions - Long Stick - Maximum Reach

7637 mm ( 300.7 in )

Dimensions - Long Stick - Cab Height

2541 mm ( 100 in )

Dimensions - Long Stick - Ground Clearance

356 mm ( 14 in )

Dimensions - Long Stick - Swing Bearing - Height

756 mm ( 29.7 in )

Dimensions - Long Stick - Track Belt/Shoe Width

450 mm ( 17.7 in )

Dimensions - Long Stick - Boom Swing - Left

604 mm ( 23.8 in )

Dimensions - Long Stick - Boom Swing - Right

935 mm ( 36.8 in )

Dimensions - Long Stick - Tail Swing without Counterweight

1450 mm ( 57.1 in )

Dimensions - Long Stick - Maximum Reach - Ground Level

7460 mm ( 293.7 in )

Dimensions - Long Stick - Note (2)

***With blade positioned at the rear of the machine.

Dimensions - Long Stick - Note (1)

**Boom Height when stick is pinned in working position with attachments Standard Stick offers only one pin position.

Dimensions - Long Stick - Height - Boom Transport - No Tools*

2260 mm ( 89 in )

Dimensions - Long Stick - Overall Shipping Length - with Counterweight

7052 mm (277.6 in)***

Dimensions - Long Stick - Height - Boom Working - With Tools**

3050 mm ( 120.1 in )

Dimensions - Long Stick - Overall Shipping Length - without Counterweight

7052 mm (277.6 in)***

Sustainability - Recyclability

96%

Weights - Note (1)

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

Weights - Note (2)

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

Hydraulic System - Note

Flow and pressure are not combinable. Under load, as flow rises pressure goes down.

Sound - Note

European Union Directive "2000/14/EC"

Dimensions - Standard Stick - Note

*Boom Height when stick is pinned in transport position with no attachments.

Dimensions - Long Stick - Note

*Boom Height when stick is pinned in transport position with no attachments.

Specifications - Note

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

Dimensions - Standard Stick - Note (1)

**Boom Height when stick is pinned in working position with attachments Standard Stick offers only one pin position.

Dimensions - Standard Stick - Note (2)

***With blade positioned at the rear of the machine.

Hydraulic System - Maximum Auxiliary Circuit - High Flow - Flow at Pump

140 l/min ( 37 gal/min )

Hydraulic System - Maximum Auxiliary Circuit - High Flow - Pressure at Pump

285 bar ( 4134 lbf/in )

Select Up To 3 Models To Compare