Cat Excavators:

309 CR Mini Hydraulic Excavator

Net Power
70.3 HP
Operating Weight
20731 lb
Dig Depth
181 in
Engine Model
Cat C3.3B

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.



Product Specs

  • Engine

  • Net Power
    70.3HP
    Engine Model
    Cat C3.3B
    Displacement
    203in³
    Bore
    3.7in
    Gross Power - ISO 14396
    74.3HP
    Stroke
    4.7in
  • Weights

  • Operating Weight
    20731lb
    Minimum Operating Weight with Cab*
    19735lb
    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.
  • Dimensions - Long Stick

  • Dig Depth
    181in
    O/A Shipping Length
    268in
    Maximum Dump Clearance
    202in
    Boom In Reach
    127in
    Vertical Wall
    132in
    Maximum Blade Depth
    26in
    O/A Undercarriage Length
    126in
    O/A Track Width
    97in
    Maximum Blade Height
    14in
    Maximum Dig Height
    279in
    Maximum Reach
    301in
    Swing Bearing - Height
    31in
    Track Belt/Shoe Width
    18in
    Boom Swing - Left
    24in
    Boom Swing - Right
    37in
    Maximum Reach - Ground Level
    293in
  • Blade

  • Height
    17in
  • Dimensions - Standard Stick

  • Boom Swing - Right
    37in
    Maximum Dump Clearance
    189in
    Maximum Reach - Ground Level
    273in
    O/A Undercarriage Length
    126in
    Cab Height
    100in
    Swing Bearing - Height
    31in
    Maximum Dig Height
    149in
    Track Belt/Shoe Width
    18in
    O/A Track Width
    97in
    O/A Shipping Length
    265in
    Maximum Reach
    281in
    Boom In Reach
    120in
    Vertical Wall
    116in
    Dig Depth
    160in
    Boom Swing - Left
    24in
    Maximum Blade Height
    14in
    Maximum Blade Depth
    26in
  • Hydraulic System

  • Type
    Load Sensing Hydraulics with Variable Displacement Piston Pump
    Operating Pressure - Swing
    3626psi
    Digging Force - Stick - Standard
    9500lb
    Digging Force - Stick - Long
    8023lb
    Operating Pressure - Travel
    4134psi
    Pump Flow at 2,400 rpm
    62gal/min
    Digging Force - Bucket
    13943lb
    Operating Pressure - Equipment
    4134psi
  • Travel System

  • Gradeability - Maximum
    30 degrees
    Travel Speed - High
    3.1mile/h
    Travel Speed - Low
    1.6mile/h
    Maximum Traction Force - High Speed
    6497lb
    Maximum Traction Force - Low Speed
    19064lb
  • Service Refill Capacities

  • Engine Oil
    3gal (US)
    Fuel Tank
    39gal (US)
    Hydraulic System
    29gal (US)
    Cooling System
    2.6gal (US)
    Hydraulic Tank
    14gal (US)
  • Sound

  • Note
    European Union Directive “2000/14/EC”
  • Swing System

  • Machine Swing Speed
    10.6r/min
    Boom Swing - Right
    50 degrees
    Boom Swing - Left
    60 degrees
  • 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.
  • Specifications

  • Note
    The 309 CR specifications are based on a machine configured with a Long (L) Undercarriage. For specifications representing a 309 CR with a Standard Undercarriage, please refer to the 308 CR information.

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)
    • Ecology Drain
  • Hydraulics
    • Smart Tech Electronic Pump
    • Variable Displacement Piston Pump
    • Load Sensing/Flow Sharing Hydraulics
    • Power On Demand
    • Hydraulic Temperature Monitoring
    • Certified Accumulator
    • HYDO Advanced Hydraulic Oil
  • Operator Environment
    • Sealed and Pressurized Cab
    • Operator Sound Pressure 72 dB(A) ISO 6396:2008
    • 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
    • 12V Power Socket
    • Radio – Bluetooth®, USB, Auxiliary, Microphone
    • Skylight
    • Mounting Bosses for Top and Front Guards
    • ROPS – ISO 12117-2:2008
    • TOPS – ISO 12117:1997
    • Top Guard – ISO 10262:1998 (Level II)
    • Color LCD Monitor
      – Fuel Level and Coolant Temperature Gauges
      – Maintenance and Machine Monitoring
      – Performance and Machine Adjustments
      – Numeric Security Code
      – Multiple Languages
      – Camera Ready
      – Hour Meter with Wake Up Switch
      – Jog Dial Control Interface
  • Undercarriage
    • Greased and Lubricated Track
    • Hydraulic Track Adjusters
    • Tie Down Eyes on Track Frame
    • Dozer Blade
    • Dozer Float
    • Bolt-on, Reversible Wear Edge
    • Steel Tracks (450 mm/17.7 in wide)
  • Boom, Stick And Linkages
    • One Piece Boom (3400 mm/133.9 in)
    • Standard Stick (1820 mm/71.7 in)
    • Long Stick (2360 mm/92.9 in)
    • Front Shovel Capable (Pin-On/Manual Coupler/Hydraulic Coupler – not available in all regions)
    • Thumb Ready (not available in all regions)
    • Certified Lifting Eye (not available in all regions)
  • Electrical
    • 12 Volt Electrical System
    • 60 Ampere Alternator
    • 900 CCA Maintenance Free Battery
    • Circuit Breaker
    • Ignition Key Stop Switch
    • Signaling/Warning Horn
    • Product Link Elite Lite (regulations apply)
    • Travel Alarm
  • Operator Environment
    • Rain Visor
    • Air Suspension Heated Seat
  • Electrical
    • Rearview Camera
    • Rotating Beacon
  • Other
    • Attachments including Buckets, Augers and Hammers
    • Wide Steel Tracks (600 mm/23.6 in)
    • Wide Dozer Blade
    • 2nd Auxiliary Hydraulic Lines with Case Drain
    • Additional Counterweight
    • Boom and Stick Hose Burst Check Valves
    • Bucket Linkage with Lift Eye
    • Track Guides
    • Water Jacket Heater
    • Refueling Pump
    • Variable Angle Boom (please see 309 CR VAB brochure for VAB specs and additional information)
    • Cab Guarding

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