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.

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Operating Weight 21091lb
Maximum Operating Weight with Cab** 21091lb
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* 19735lb
Dig Depth 182.8in
Maximum Dump Clearance 199.7in
Boom In Reach 126.6in
Vertical Wall 134in
Maximum Blade Depth 26in
O/A Undercarriage Length 126in
O/A Track Width 97.2in
Stick Length 92.8in
Maximum Blade Height 16.1in
Maximum Dig Height 277.1in
Tail Swing with Counterweight 62.4in
Maximum Reach 300.7in
Cab Height 100in
Ground Clearance 14in
Swing Bearing - Height 29.7in
Track Belt/Shoe Width 17.7in
Boom Swing - Left 23.8in
Boom Swing - Right 36.8in
Tail Swing without Counterweight 57.1in
Maximum Reach - Ground Level 293.7in
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* 89in
Overall Shipping Length - with Counterweight 7052 mm (277.6 in)***
Height - Boom Working - With Tools** 120.1in
Overall Shipping Length - without Counterweight 7052 mm (277.6 in)***
Engine Model Cat C3.3B
Displacement 203in³
Bore 3.7in
Stroke 4.7in
Gross Power - SAE J1995 74.3HP
Rated Net Power - 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269 69.5HP
Height 17in
Width - Wide 104in
Width - Standard 97in
Swing Bearing - Height 29.7in
Maximum Dig Height 265.2in
Track Belt/Shoe Width 17.7in
O/A Track Width 97.2in
Ground Clearance 14in
Maximum Reach 281.1in
Tail Swing with Counterweight 62.4in
Boom In Reach 120.4in
Vertical Wall 117.8in
Dig Depth 161.7in
Stick Length 71.8in
Boom Swing - Left 23.8in
Maximum Blade Height 16.1in
Maximum Blade Depth 26in
Note *Boom Height when stick is pinned in transport position with no attachments.
Overall Shipping Length - without Counterweight 266.7in
Overall Shipping Length - with Counterweight 266.7in
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* 95.7in
Height - Boom Working - With Tools** 104.7in
Boom Swing - Right 36.8in
Maximum Dump Clearance 187.4in
Tail Swing without Counterweight 57.1in
Maximum Reach - Ground Level 273.6in
O/A Undercarriage Length 126in
Cab Height 100in
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.
Maximum Auxiliary Circuit - High Flow - Pressure at Pump 4134lbf/in
Maximum Auxiliary Circuit - High Flow - Flow at Pump 37gal/min
Maximum Auxiliary Circuit - Primary - Pressure at Pump 4134psi
Maximum Auxiliary Circuit - Primary - Flow at Pump 35gal/min
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
Note Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Maximum Auxiliary Circuit - Secondary - Flow at Pump 9gal/min
Maximum Auxiliary Circuit - Secondary - Pressure at Pump 4134psi
Note The 309 CR specifications are based on a machine configured with a Long (L) Undercarriage.
Steel Tracks with Pads 728lb
Long Stick 146lb
Counterweight 552lb
Gradeability - Maximum 30 degrees
Ground Pressure - Minimum Weight 5psi
Ground Pressure - Maximum Weight 5.4psi
Travel Speed - High 3.1mile/h
Travel Speed - Low 1.6mile/h
Maximum Traction Force - High Speed 6497lb
Maximum Traction Force - Low Speed 19064lb
Engine Oil 3gal (US)
Fuel Tank 39gal (US)
Hydraulic System 29gal (US)
Cooling System 2.6gal (US)
Hydraulic Tank 14gal (US)
Machine Swing Speed 10.6r/min
Boom Swing - Right 50 degrees
Boom Swing - Left 60 degrees
Roll Over Protective Structure (ROPS) ISO 12117-2:2008
Top Guard ISO 10262:1998 (Level I)
Tip Over Protective Structure (TOPS) ISO 12117:1997
Average Exterior Sound Pressure (ISO 6395:2008) 99dB(A)
Note European Union Directive "2000/14/EC"
Operator Sound Pressure (ISO 6396:2008) 72dB(A)

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)