New | 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.

Engine ModelCat C3.3B
Net Power70.3 HP
Displacement203 in³
Bore3.7 in
Rated Net Power - 2,200 rpm - EU Stage V - ISO 9249/EEC 80/126971.5 HP
Gross Power - ISO 1439674.3 HP
Rated Net Power - 2,200 rpm - U.S. EPA Tier 4 Final - ISO 9249/EEC 80/126970.3 HP
Stroke4.7 in
Operating Weight20731 lb
Maximum Operating Weight with Cab**21091 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.
Minimum Operating Weight with Cab*19735 lb
Height17 in
Width - Wide104 in
Width - Standard97 in
Dimensions - Long Stick
O/A Shipping Length268 in
Maximum Dump Clearance202 in
Dig Depth181 in
Boom In Reach127 in
Vertical Wall132 in
Maximum Blade Depth26 in
O/A Undercarriage Length126 in
O/A Track Width97 in
Transport Height99 in
Stick Length93 in
Maximum Blade Height14 in
Maximum Dig Height279 in
Tail Swing with Counterweight65 in
Maximum Reach301 in
Cab Height100 in
Ground Clearance13.5 in
Swing Bearing - Height31 in
Track Belt/Shoe Width18 in
Boom Swing - Left24 in
Boom Swing - Right37 in
Tail Swing without Counterweight57 in
Maximum Reach - Ground Level293 in
Dimensions - Standard Stick
Boom Swing - Right37 in
Maximum Dump Clearance189 in
Tail Swing without Counterweight57 in
Transport Height98 in
Maximum Reach - Ground Level273 in
O/A Undercarriage Length126 in
Cab Height100 in
Swing Bearing - Height31 in
Maximum Dig Height149 in
Track Belt/Shoe Width18 in
O/A Track Width97 in
Ground Clearance14 in
O/A Shipping Length265 in
Maximum Reach281 in
Tail Swing with Counterweight65 in
Boom In Reach120 in
Vertical Wall116 in
Dig Depth160 in
Stick Length72 in
Boom Swing - Left24 in
Maximum Blade Height14 in
Maximum Blade Depth26 in
Hydraulic System
TypeLoad Sensing Hydraulics with Variable Displacement Piston Pump
Operating Pressure - Swing3626 psi
Auxiliary Circuit - Secondary - Flow9 gal/min
Auxiliary Circuit - Primary (High Flow) - Pressure4134 psi
Digging Force - Stick - Standard9500 lb
Digging Force - Stick - Long8023 lb
Auxiliary Circuit - Secondary - Pressure4134 psi
Operating Pressure - Travel4134 psi
Pump Flow at 2,400 rpm62 gal/min
Digging Force - Bucket13943 lb
Auxiliary Circuit - Primary (High Flow) - Flow37 gal/min
Operating Pressure - Equipment4134 psi
Average Exterior Sound Pressure (ISO 6395:2008)99 dB(A)
NoteEuropean Union Directive “2000/14/EC”
Operator Sound Pressure (ISO 6396:2008)72 dB(A)
Travel System
Gradeability - Maximum30 degrees
Ground Pressure - Minimum Weight5 psi
Ground Pressure - Maximum Weight5.4 psi
Travel Speed - High3.1 mile/h
Travel Speed - Low1.6 mile/h
Maximum Traction Force - High Speed6497 lb
Maximum Traction Force - Low Speed19064 lb
Certification - Cab
Roll Over Protective Structure (ROPS)ISO 12117-2:2008
Top GuardISO 10262:1998 (Level II)
Tip Over Protective Structure (TOPS)ISO 12117:1997
Service Refill Capacities
Engine Oil3 gal (US)
Fuel Tank39 gal (US)
Hydraulic System29 gal (US)
Cooling System2.6 gal (US)
Hydraulic Tank14 gal (US)
Weight Increase from Minimum Configuration
Steel Tracks with Pads728 lb
Long Stick146 lb
Counterweight552 lb
Swing System
Machine Swing Speed10.6 r/min
Boom Swing - Right50 degrees
Boom Swing - Left60 degrees
Air Conditioning System
Air ConditioningThe 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.
NoteThe 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.

  • a Sealed And Pressurized Cab Is Equipped With An Improved Air Conditioning System, Adjustable Wrist Rests And A Suspension Seat To Help Keep You Working Comfortably All Day Long.

  • controls Are Easy To Use And The Intuitive Next Generation Monitor Provides Customizable Machine Operator Preferences And Easy To Read Machine Information.

  • moving Around The Job Site Is Even Easier With The Cat Stick Steer Option. Easily Switch From Traditional Travel Controls With Levers And Pedals To Joystick Controls With A Push Of A Button. The Benefit Of Less Effort And Improved Control Is In Your Hands!

  • increased Lifting, Swinging, Travel And Multi-Functioning Performance Helps You Get The Job Done More Efficiently, And Dig-To-Blade Allows For Easy Clean Up.

  • your Safety Is Our Top Priority. The Cat Mini Excavator Is Designed To Help Keep You Safe On The Job. A Back-Up Camera, Courtesy Work Lights And A Fluorescent Retractable Seat Belt Are Just A Few Of The Safety Features We’ve Built Into The Machine.

  • maintenance Is Quick And Easy On The Cat Mini Excavator. Routine Check Points Are Easy To Access At Ground Level With Grouped Service Points And Robust Service Panels.

  • equipped With Features Such As Auto Idle, Auto Engine Shutdown, And Efficient Hydraulics With A Variable Displacement Pump, The Cat Mini Excavator Was Designed With Reducing Your Operating Costs In Mind.

  • your Cat Dealer Is Here To Help You Reach Your Business Goals. From Providing Equipment Solutions To Operator Training To Service Needs And Beyond, Your Cat Dealer Is Ready To Help.

Standard Equipment

  • 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
  • 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
  • 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
  • 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)
  • 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)
  • 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

Optional Equipment

  • Rain Visor
  • Air Suspension Heated Seat
  • Rearview Camera
  • Rotating Beacon
  • 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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