New CAT Equipment

309 CR Mini Hydraulic Excavator

Mini Excavators Inspired by Our Customers

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.

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    Benefits

    4 Industry First Features

    Cat Exclusives in a Mini Excavator

    Up to 10% Lower Total Ownership Costs

    with improved fuel efficiency and longer service intervals

    Up to 20% More Performance

    with customizable operator settings and improvements in lift, swing, travel and multifunction

    Learn more about the 309 CR Mini Hydraulic Excavator

    Watch

    • 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.
    • Blade
      Height
      17 in
      Width - Standard
      97 in
      Width - Wide
      104 in
    • Certification - Cab
      Roll Over Protective Structure (ROPS)
      ISO 12117-2:2008
      Tip Over Protective Structure (TOPS)
      ISO 12117:1997
      Top Guard
      ISO 10262:1998 (Level I)
    • Dimensions - Long Stick
      Boom In Reach
      126.6 in
      Boom Swing - Left
      23.8 in
      Boom Swing - Right
      36.8 in
      Cab Height
      100 in
      Dig Depth
      182.8 in
      Ground Clearance
      14 in
      Height - Boom Transport - No Tools*
      89 in
      Height - Boom Working - With Tools**
      120.1 in
      Maximum Blade Depth
      26 in
      Maximum Blade Height
      16.1 in
      Maximum Dig Height
      277.1 in
      Maximum Dump Clearance
      199.7 in
      Maximum Reach
      300.7 in
      Maximum Reach - Ground Level
      293.7 in
      Note
      *Boom Height when stick is pinned in transport position with no attachments.
      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.
      O/A Track Width
      97.2 in
      O/A Undercarriage Length
      126 in
      Overall Shipping Length - with Counterweight
      7052 mm (277.6 in)***
      Overall Shipping Length - without Counterweight
      7052 mm (277.6 in)***
      Stick Length
      92.8 in
      Swing Bearing - Height
      29.7 in
      Tail Swing with Counterweight
      62.4 in
      Tail Swing without Counterweight
      57.1 in
      Track Belt/Shoe Width
      17.7 in
      Vertical Wall
      134 in
    • Dimensions - Standard Stick
      Boom In Reach
      120.4 in
      Boom Swing - Left
      23.8 in
      Boom Swing - Right
      36.8 in
      Cab Height
      100 in
      Dig Depth
      161.7 in
      Ground Clearance
      14 in
      Height - Boom Transport - No Tools*
      95.7 in
      Height - Boom Working - With Tools**
      104.7 in
      Maximum Blade Depth
      26 in
      Maximum Blade Height
      16.1 in
      Maximum Dig Height
      265.2 in
      Maximum Dump Clearance
      187.4 in
      Maximum Reach
      281.1 in
      Maximum Reach - Ground Level
      273.6 in
      Note
      *Boom Height when stick is pinned in transport position with no attachments.
      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.
      O/A Track Width
      97.2 in
      O/A Undercarriage Length
      126 in
      Overall Shipping Length - with Counterweight
      266.7 in
      Overall Shipping Length - without Counterweight
      266.7 in
      Stick Length
      71.8 in
      Swing Bearing - Height
      29.7 in
      Tail Swing with Counterweight
      62.4 in
      Tail Swing without Counterweight
      57.1 in
      Track Belt/Shoe Width
      17.7 in
      Vertical Wall
      117.8 in
    • Engine
      Bore
      3.7 in
      Displacement
      203 in³
      Engine Model
      Cat C3.3B
      Gross Power - SAE J1995
      74.3 HP
      Net Power
      69.5 HP
      Rated Net Power - 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269
      69.5 HP
      Stroke
      4.7 in
    • Hydraulic System
      Digging Force - Bucket
      13943 lb
      Digging Force - Stick - Long
      8023 lb
      Digging Force - Stick - Standard
      9500 lb
      Maximum Auxiliary Circuit - High Flow - Flow at Pump
      37 gal/min
      Maximum Auxiliary Circuit - High Flow - Pressure at Pump
      4134 lbf/in
      Maximum Auxiliary Circuit - Primary - Flow at Pump
      35 gal/min
      Maximum Auxiliary Circuit - Primary - Pressure at Pump
      4134 psi
      Maximum Auxiliary Circuit - Secondary - Flow at Pump
      9 gal/min
      Maximum Auxiliary Circuit - Secondary - Pressure at Pump
      4134 psi
      Note
      Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
      Operating Pressure - Equipment
      4134 psi
      Operating Pressure - Swing
      3626 psi
      Operating Pressure - Travel
      4134 psi
      Pump Flow at 2,400 rpm
      62 gal/min
      Type
      Load Sensing Hydraulics with Variable Displacement Piston Pump
    • Service Refill Capacities
      Cooling System
      2.6 gal (US)
      Engine Oil
      3 gal (US)
      Fuel Tank
      39 gal (US)
      Hydraulic System
      29 gal (US)
      Hydraulic Tank
      14 gal (US)
    • Sound
      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)
    • Specifications
      Note
      The 309 CR specifications are based on a machine configured with a Long (L) Undercarriage.
    • Sustainability
      Recyclability
      96%
    • Swing System
      Boom Swing - Left
      60 degrees
      Boom Swing - Right
      50 degrees
      Machine Swing Speed
      10.6 r/min
    • Travel System
      Gradeability - Maximum
      30 degrees
      Ground Pressure - Maximum Weight
      5.4 psi
      Ground Pressure - Minimum Weight
      5 psi
      Maximum Traction Force - High Speed
      6497 lb
      Maximum Traction Force - Low Speed
      19064 lb
      Travel Speed - High
      3.1 mile/h
      Travel Speed - Low
      1.6 mile/h
    • Weight Increase from Minimum Configuration
      Counterweight
      552 lb
      Long Stick
      146 lb
      Steel Tracks with Pads
      728 lb
    • Weights
      Maximum Operating Weight with Cab**
      21091 lb
      Minimum Operating Weight with Cab*
      19735 lb
      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.
      Operating Weight
      21091 lb
    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
    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)