US
Metric

Overview

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

Engine Model
Cat C3.3B
Net Power
70.30 HP
52.40 kW

Weights

Operating Weight
20731.00 lb
9403.00 kg

Blade

Height
17.00 in
431.00 mm

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.

Blade

Width - Standard
97.00 in
2470.00 mm
Width - Wide
104.00 in
2640.00 mm

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
127.00 in
3215.00 mm
Boom Swing - Left
24.00 in
604.00 mm
Boom Swing - Right
37.00 in
935.00 mm
Cab Height
100.00 in
2607.00 mm
Dig Depth
181.00 in
4593.00 mm
Ground Clearance
13.50 in
356.00 mm
Maximum Blade Depth
26.00 in
671.00 mm
Maximum Blade Height
14.00 in
355.00 mm
Maximum Dig Height
279.00 in
7089.00 mm
Maximum Dump Clearance
202.00 in
5122.00 mm
Maximum Reach
301.00 in
7637.00 mm
Maximum Reach - Ground Level
293.00 in
7449.00 mm
O/A Shipping Length
268.00 in
6816.00 mm
O/A Track Width
97.00 in
2470.00 mm
O/A Undercarriage Length
126.00 in
3200.00 mm
Stick Length
93.00 in
2358.00 mm
Swing Bearing - Height
31.00 in
795.00 mm
Tail Swing with Counterweight
65.00 in
1645.00 mm
Tail Swing without Counterweight
57.00 in
1450.00 mm
Track Belt/Shoe Width
18.00 in
450.00 mm
Transport Height
99.00 in
2514.00 mm
Vertical Wall
132.00 in
3354.00 mm

Dimensions - Standard Stick

Boom In Reach
120.00 in
3059.00 mm
Boom Swing - Left
24.00 in
604.00 mm
Boom Swing - Right
37.00 in
935.00 mm
Cab Height
100.00 in
2607.00 mm
Dig Depth
160.00 in
4058.00 mm
Ground Clearance
14.00 in
356.00 mm
Maximum Blade Depth
26.00 in
671.00 mm
Maximum Blade Height
14.00 in
355.00 mm
Maximum Dig Height
149.00 in
3786.00 mm
Maximum Dump Clearance
189.00 in
4810.00 mm
Maximum Reach
281.00 in
7141.00 mm
Maximum Reach - Ground Level
273.00 in
6930.00 mm
O/A Shipping Length
265.00 in
6731.00 mm
O/A Track Width
97.00 in
2470.00 mm
O/A Undercarriage Length
126.00 in
3200.00 mm
Stick Length
72.00 in
1823.00 mm
Swing Bearing - Height
31.00 in
795.00 mm
Tail Swing with Counterweight
65.00 in
1645.00 mm
Tail Swing without Counterweight
57.00 in
1450.00 mm
Track Belt/Shoe Width
18.00 in
450.00 mm
Transport Height
98.00 in
2487.00 mm
Vertical Wall
116.00 in
2941.00 mm

Engine

Bore
3.70 in
94.00 mm
Displacement
203.00 in³
3.33 l
Gross Power - ISO 14396
74.30 HP
55.40 kW
Rated Net Power - 2,200 rpm - EU Stage V - ISO 9249/EEC 80/1269
71.50 HP
53.30 kW
Rated Net Power - 2,200 rpm - U.S. EPA Tier 4 Final - ISO 9249/EEC 80/1269
70.30 HP
52.40 kW
Stroke
4.70 in
120.00 mm

Hydraulic System

Auxiliary Circuit - Primary (High Flow) - Flow
37.00 gal/min
140.00 l/min
Auxiliary Circuit - Primary (High Flow) - Pressure
4134.00 psi
285.00 bar
Auxiliary Circuit - Secondary - Flow
9.00 gal/min
33.00 l/min
Auxiliary Circuit - Secondary - Pressure
4134.00 psi
285.00 bar
Digging Force - Bucket
13943.00 lb
62.00 kN
Digging Force - Stick - Long
8023.00 lb
35.70 kN
Digging Force - Stick - Standard
9500.00 lb
42.30 kN
Operating Pressure - Equipment
4134.00 psi
285.00 bar
Operating Pressure - Swing
3626.00 psi
250.00 bar
Operating Pressure - Travel
4134.00 psi
285.00 bar
Pump Flow at 2,400 rpm
62.00 gal/min
233.00 l/min
Type
Load Sensing Hydraulics with Variable Displacement Piston Pump

Service Refill Capacities

Cooling System
2.60 gal (US)
10.00 l
Engine Oil
3.00 gal (US)
11.20 l
Fuel Tank
39.00 gal (US)
147.00 l
Hydraulic System
29.00 gal (US)
110.00 l
Hydraulic Tank
14.00 gal (US)
53.00 l

Sound

Average Exterior Sound Pressure (ISO 6395:2008)
99.00 dB(A)
99.00 dB(A)
Note
European Union Directive “2000/14/EC”
Operator Sound Pressure (ISO 6396:2008)
72.00 dB(A)
72.00 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
10.60 r/min
10.60 r/min

Travel System

Gradeability - Maximum
30 degrees
Ground Pressure - Maximum Weight
5.40 psi
37.10 kPa
Ground Pressure - Minimum Weight
5.00 psi
34.70 kPa
Maximum Traction Force - High Speed
6497.00 lb
28.90 kN
Maximum Traction Force - Low Speed
19064.00 lb
84.80 kN
Travel Speed - High
3.10 mile/h
4.90 km/h
Travel Speed - Low
1.60 mile/h
2.60 km/h

Weight Increase from Minimum Configuration

Counterweight
552.00 lb
250.00 kg
Long Stick
146.00 lb
66.00 kg
Steel Tracks with Pads
728.00 lb
330.00 kg

Weights

Maximum Operating Weight with Cab**
21091.00 lb
9565.00 kg
Minimum Operating Weight with Cab*
19735.00 lb
8950.00 kg
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.

Swing System

Boom Swing - Right
50 degrees
Boom Swing - Left
60 degrees
Features

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.
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
    • 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
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 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