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.

309 CR

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.

Net Power

69.5 hp / 51.8 kW

Operating Weight

21091 lb / 9565 kg

Dig Depth

161.7 in / 4108 mm
  • Specifications
  • Standard / Optional Features
  • Overview
    • Long Name -309 CR Mini Hydraulic Excavator
    • Name -309 CR
    • Brand -Caterpillar
    • Status -Current
  • Engine
    • Net Power - 69.5 hp / 51.8 kW
    • Displacement - 203 in³ / 3.33 l
    • Bore - 3.7 in / 94 mm
    • Stroke - 4.7 in / 120 mm
    • Gross Power - SAE J1995:2014 - 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
    • Engine Model - Cat C3.3B
  • Specifications
    • Note - The 309 CR specifications are based on a machine configured with a Long (L) Undercarriage.
  • Weights
    • Operating Weight - 21091 lb / 9565 kg
    • 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
  • Dimensions - Long Stick
    • Dig Depth - 182.8 in / 4642 mm
    • 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)***
  • 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 lbf / 28.9 kN
    • Maximum Traction Force - Low Speed - 19064 lbf / 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 lbf / 42.3 kN
    • Digging Force - Stick - Long - 8023 lbf / 35.7 kN
    • Operating Pressure - Travel - 4134 psi / 285 bar
    • Pump Flow at 2,400 rpm - 62 gpm / 233 L/min
    • Digging Force - Bucket - 13943 lbf / 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 gpm / 33 L/min
    • Maximum Auxiliary Circuit - Primary - Pressure at Pump - 4134 psi / 285 bar
    • Maximum Auxiliary Circuit - Primary - Flow at Pump - 35 gpm / 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 gpm / 140 L/min
  • 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
  • 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%
  • 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)