309 CR Mini Hydraulic Excavator

Overview
Engine Model
Cat C3.3B
Net Power
70 HP
Operating Weight
20,731 lb
  • Exterior View
  • Interior View

Engine

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

Weights

Operating Weight
20,731 lb
Maximum Operating Weight with Cab**
21,091 lb
Minimum Operating Weight with Cab*
19,735 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.

Blade

Height
17 in
Width - Standard
97 in
Width - Wide
104 in

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
127 in
Boom Swing - Left
24 in
Boom Swing - Right
37 in
Cab Height
100 in
Dig Depth
181 in
Ground Clearance
14 in
Maximum Blade Depth
26 in
Maximum Blade Height
14 in
Maximum Dig Height
279 in
Maximum Dump Clearance
202 in
Maximum Reach
301 in
Maximum Reach - Ground Level
293 in
O/A Shipping Length
268 in
O/A Track Width
97 in
O/A Undercarriage Length
126 in
Stick Length
93 in
Swing Bearing - Height
31 in
Tail Swing with Counterweight
65 in
Tail Swing without Counterweight
57 in
Track Belt/Shoe Width
18 in
Transport Height
99 in
Vertical Wall
132 in

Dimensions - Standard Stick

Boom In Reach
120 in
Boom Swing - Left
24 in
Boom Swing - Right
37 in
Cab Height
100 in
Dig Depth
160 in
Ground Clearance
14 in
Maximum Blade Depth
26 in
Maximum Blade Height
14 in
Maximum Dig Height
149 in
Maximum Dump Clearance
189 in
Maximum Reach
281 in
Maximum Reach - Ground Level
273 in
O/A Shipping Length
265 in
O/A Track Width
97 in
O/A Undercarriage Length
126 in
Stick Length
72 in
Swing Bearing - Height
31 in
Tail Swing with Counterweight
65 in
Tail Swing without Counterweight
57 in
Track Belt/Shoe Width
18 in
Transport Height
98 in
Vertical Wall
116 in

Hydraulic System

Auxiliary Circuit - Primary (High Flow) - Flow
37 gal/min
Auxiliary Circuit - Primary (High Flow) - Pressure
4,134 psi
Auxiliary Circuit - Secondary - Flow
9 gal/min
Auxiliary Circuit - Secondary - Pressure
4,134 psi
Digging Force - Bucket
13,943 lb
Digging Force - Stick - Long
8,023 lb
Digging Force - Stick - Standard
9,500 lb
Operating Pressure - Equipment
4,134 psi
Operating Pressure - Swing
3,626 psi
Operating Pressure - Travel
4,134 psi
Pump Flow at 2,400 rpm
62 gal/min
Type
Load Sensing Hydraulics with Variable Displacement Piston Pump

Service Refill Capacities

Cooling System
3 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. For specifications representing a 309 CR with a Standard Undercarriage, please refer to the 308 CR information.

Swing System

Machine Swing Speed
11 r/min
Boom Swing - Right
50 degrees
Boom Swing - Left
60 degrees

Travel System

Gradeability - Maximum
30 degrees
Ground Pressure - Maximum Weight
5 psi
Ground Pressure - Minimum Weight
5 psi
Maximum Traction Force - High Speed
6,497 lb
Maximum Traction Force - Low Speed
19,064 lb
Travel Speed - High
3 mile/h
Travel Speed - Low
2 mile/h

Weight Increase from Minimum Configuration

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

ALL DAY COMFORT

  • 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.

EASY TO OPERATE

  • Controls are easy to use and the intuitive Next Generation Monitor provides customizable machine operator preferences and easy to read machine information.

STICK STEER TRAVEL MODE

  • 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!

BIG PERFORMANCE IN A MINI DESIGN

  • 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.

SAFETY ON THE JOB SITE

  • 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.

SIMPLE SERVICE FOR LESS DOWNTIME

  • 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.

LOWER OPERATING COSTS

  • 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.
  • 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
    • HYDO 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
    • 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
  • 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 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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