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

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  • 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 J1995:2014
    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)

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