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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Engine Model
Cat C3.3B
Net Power
70.3 HP
Operating Weight
20731 lb
Height
17 in

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Product Specs

Engine

Engine Model
Cat C3.3B
Net Power
70.3HP
Bore
3.7in
Displacement
203in³
Gross Power - ISO 14396
74.3HP
Rated Net Power - 2,200 rpm - EU Stage V - ISO 9249/EEC 80/1269
71.5HP
Rated Net Power - 2,200 rpm - U.S. EPA Tier 4 Final - ISO 9249/EEC 80/1269
70.3HP
Stroke
4.7in

Weights

Operating Weight
20731lb
Maximum Operating Weight with Cab**
20731lb
Minimum Operating Weight with Cab*
19304lb
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.

Blade

Height
17in
Width - Standard
97.2in
Width - Wide
103.9in

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.

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 II)

Dimensions - Long Stick

Boom In Reach
126.6in
Boom Swing - Left
24in
Boom Swing - Right
37in
Cab Height
99in
Dig Depth
183.1in
Ground Clearance
13.5in
Maximum Blade Depth
26.9in
Maximum Blade Height
13.5in
Maximum Dig Height
276.8in
Maximum Dump Clearance
199.4in
Maximum Reach
300.7in
Maximum Reach - Ground Level
293.8in
O/A Shipping Length
262.3in
O/A Track Width
97.2in
O/A Undercarriage Length
126in
Stick Length
92.8in
Swing Bearing - Height
28.7in
Tail Swing with Counterweight
64.8in
Tail Swing without Counterweight
57.1in
Track Belt/Shoe Width
17.7in
Transport Height
99in
Vertical Wall
134.3in

Dimensions - Standard Stick

Boom In Reach
120.4in
Boom Swing - Left
24in
Boom Swing - Right
37in
Cab Height
99in
Dig Depth
162in
Ground Clearance
13.5in
Maximum Blade Depth
26.9in
Maximum Blade Height
13.5in
Maximum Dig Height
264.9in
Maximum Dump Clearance
187.1in
Maximum Reach
281.1in
Maximum Reach - Ground Level
273.6in
O/A Shipping Length
259in
O/A Track Width
97.2in
O/A Undercarriage Length
126in
Stick Length
71.8in
Swing Bearing - Height
28.7in
Tail Swing with Counterweight
64.8in
Tail Swing without Counterweight
57.1in
Track Belt/Shoe Width
17.7in
Transport Height
97.9in
Vertical Wall
118in

Hydraulic System

Auxiliary Circuit - Primary (High Flow) - Flow
37gal/min
Auxiliary Circuit - Primary (High Flow) - Pressure
4134psi
Auxiliary Circuit - Secondary - Flow
9gal/min
Auxiliary Circuit - Secondary - Pressure
4134psi
Digging Force - Bucket
13943lb
Digging Force - Stick - Long
8023lb
Digging Force - Stick - Standard
9500lb
Operating Pressure - Equipment
4134psi
Operating Pressure - Swing
3626psi
Operating Pressure - Travel
4134psi
Pump Flow at 2,400 rpm
62gal/min
Type
Load Sensing Hydraulics with Variable Displacement Piston Pump

Service Refill Capacities

Cooling System
2.6gal (US)
Engine Oil
3gal (US)
Fuel Tank
39gal (US)
Hydraulic System
28gal (US)
Hydraulic Tank
14gal (US)

Sound

Average Exterior Sound Pressure (ISO 6395:2008)
99dB(A)
Note
European Union Directive “2000/14/EC”
Operator Sound Pressure (ISO 6396:2008)
72dB(A)

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.

Swing System

Machine Swing Speed
10.6r/min

Travel System

Gradeability - Maximum
30 degrees
Ground Pressure - Maximum Weight
6psi
Ground Pressure - Minimum Weight
6psi
Maximum Traction Force - High Speed
6497lb
Maximum Traction Force - Low Speed
19064lb
Travel Speed - High
3.1mile/h
Travel Speed - Low
1.6mile/h

Weight Increase from Minimum Configuration

Counterweight
552lb
Long Stick
146lb
Steel Tracks with Pads
728lb

Standard/Optional Features

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)
    • Ecology Drain
  • Hydraulics
    • Smart Tech Electronic Pump
    • Variable Displacement Piston Pump
    • Load Sensing/Flow Sharing Hydraulics
    • Power On Demand
    • Hydraulic Temperature Monitoring
    • Certified Accumulator
    • Hydro 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
    • 90 Ampere Alternator
    • 850 CCA Maintenance Free Battery
    • Circuit Breaker
    • Ignition Key Stop Switch
    • Signaling/Warning Horn
    • Product Link Elite Lite (regulations apply)
    • Travel Alarm

Optional Equipment:

  • 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
    • 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