309 CR Mini Hydraulic Excavator

Overview
Net Power
70 HP
Operating Weight
21,091 lb
Dig Depth
183 in
  • Exterior View
  • Interior View

Engine

Net Power
70 HP
Engine Model
Cat C3.3B
Displacement
203 in³
Bore
4 in
Rated Net Power - 2,200 rpm - EU Stage V - ISO 9249/EEC 80/1269
72 HP
Gross Power - ISO 14396
74 HP
Rated Net Power - 2,200 rpm - U.S. EPA Tier 4 Final - ISO 9249/EEC 80/1269
70 HP
Stroke
5 in
Gross Power - SAE J1995
74 HP
Rated Net Power - 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269
70 HP

Weights

Operating Weight
21,091 lb
Maximum Operating Weight with Cab**
21,091 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*
19,735 lb

Dimensions - Long Stick

Dig Depth
183 in
O/A Shipping Length
268 in
Maximum Dump Clearance
200 in
Boom In Reach
127 in
Vertical Wall
134 in
Maximum Blade Depth
26 in
O/A Undercarriage Length
126 in
O/A Track Width
97 in
Transport Height
99 in
Stick Length
93 in
Maximum Blade Height
16 in
Maximum Dig Height
277 in
Tail Swing with Counterweight
62 in
Maximum Reach
301 in
Cab Height
100 in
Ground Clearance
14 in
Swing Bearing - Height
30 in
Track Belt/Shoe Width
18 in
Boom Swing - Left
24 in
Boom Swing - Right
37 in
Tail Swing without Counterweight
57 in
Maximum Reach - Ground Level
294 in
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*
89 in
Overall Shipping Length - with Counterweight
7052 mm (277.6 in)***
Height - Boom Working - With Tools**
120 in
Overall Shipping Length - without Counterweight
7052 mm (277.6 in)***

Blade

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

Dimensions - Standard Stick

Boom Swing - Right
37 in
Maximum Dump Clearance
187 in
Tail Swing without Counterweight
57 in
Transport Height
98 in
Maximum Reach - Ground Level
274 in
O/A Undercarriage Length
126 in
Cab Height
100 in
Swing Bearing - Height
30 in
Maximum Dig Height
265 in
Track Belt/Shoe Width
18 in
O/A Track Width
97 in
Ground Clearance
14 in
O/A Shipping Length
265 in
Maximum Reach
281 in
Tail Swing with Counterweight
62 in
Boom In Reach
120 in
Vertical Wall
118 in
Dig Depth
162 in
Stick Length
72 in
Boom Swing - Left
24 in
Maximum Blade Height
16 in
Maximum Blade Depth
26 in
Note
*Boom Height when stick is pinned in transport position with no attachments.
Overall Shipping Length - without Counterweight
267 in
Overall Shipping Length - with Counterweight
267 in
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*
96 in
Height - Boom Working - With Tools**
105 in

Hydraulic System

Type
Load Sensing Hydraulics with Variable Displacement Piston Pump
Operating Pressure - Swing
3,626 psi
Auxiliary Circuit - Secondary - Flow
9 gal/min
Auxiliary Circuit - Primary (High Flow) - Pressure
4,134 psi
Digging Force - Stick - Standard
9,500 lb
Digging Force - Stick - Long
8,023 lb
Auxiliary Circuit - Secondary - Pressure
4,134 psi
Operating Pressure - Travel
4,134 psi
Pump Flow at 2,400 rpm
62 gal/min
Digging Force - Bucket
13,943 lb
Auxiliary Circuit - Primary (High Flow) - Flow
37 gal/min
Operating Pressure - Equipment
4,134 psi
Note
Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Maximum Auxiliary Circuit - Secondary - Flow at Pump
9 gal/min
Maximum Auxiliary Circuit - Secondary - Pressure at Pump
4,134 psi
Maximum Auxiliary Circuit - Primary (High Flow) - Flow at Pump
37 gal/min
Maximum Auxiliary Circuit - Primary (High Flow) - Pressure at Pump
4,134 psi

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)

Travel System

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

Certification - Cab

Roll Over Protective Structure (ROPS)
ISO 12117-2:2008
Top Guard
ISO 10262:1998 (Level I)
Tip Over Protective Structure (TOPS)
ISO 12117:1997

Service Refill Capacities

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

Weight Increase from Minimum Configuration

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

Swing System

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

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.

Specifications

Note
The 309 CR specifications are based on a machine configured with a Long (L) Undercarriage.

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 blade float 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.

UNMATCHED DEALER SUPPORT

  • 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.
  • 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
    • 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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