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

Net Power
69.50 HP
51.80 kW

Weights

Operating Weight
21091.00 lb
9565.00 kg

Dimensions - Long Stick

Dig Depth
182.80 in
4643.00 mm

Engine

Engine Model
Cat C3.3B

Blade

Height
17.00 in
431.00 mm

Dimensions - Long Stick

O/A Shipping Length
268.00 in
6816.00 mm

Dimensions - Standard Stick

Boom Swing - Right
36.80 in
935.00 mm

Blade

Width - Wide
104.00 in
2640.00 mm

Hydraulic System

Type
Load Sensing Hydraulics with Variable Displacement Piston Pump

Weights

Maximum Operating Weight with Cab**
21091.00 lb
9565.00 kg

Dimensions - Standard Stick

Maximum Dump Clearance
187.40 in
4760.00 mm
Tail Swing without Counterweight
57.10 in
1450.00 mm

Dimensions - Long Stick

Maximum Dump Clearance
199.70 in
5072.00 mm

Dimensions - Standard Stick

Transport Height
98.00 in
2487.00 mm
Maximum Reach - Ground Level
273.60 in
6949.00 mm
O/A Undercarriage Length
126.00 in
3200.00 mm
Cab Height
100.00 in
2541.00 mm

Sound

Average Exterior Sound Pressure (ISO 6395:2008)
99.00 dB(A)
99.00 dB(A)

Engine

Displacement
203.00 in³
3.33 l

Hydraulic System

Operating Pressure - Swing
3626.00 psi
250.00 bar

Weights

Note (1)
*Minimum Weight is based on steel tracks, no counterweight, operator, full fuel tank, standard stick, blade and no bucket.

Dimensions - Standard Stick

Swing Bearing - Height
29.70 in
756.00 mm
Maximum Dig Height
265.20 in
6736.00 mm

Dimensions - Long Stick

Boom In Reach
126.60 in
3215.00 mm
Vertical Wall
134.00 in
3404.00 mm

Engine

Bore
3.70 in
94.00 mm

Travel System

Gradeability - Maximum
30 degrees

Engine

Rated Net Power - 2,200 rpm - EU Stage V - ISO 9249/EEC 80/1269
71.50 HP
53.30 kW

Hydraulic System

Auxiliary Circuit - Secondary - Flow
9.00 gal/min
33.00 l/min
Auxiliary Circuit - Primary (High Flow) - Pressure
4134.00 psi
285.00 bar

Dimensions - Long Stick

Maximum Blade Depth
26.00 in
671.00 mm

Certification - Cab

Roll Over Protective Structure (ROPS)
ISO 12117-2:2008

Engine

Gross Power - ISO 14396
74.30 HP
55.40 kW

Dimensions - Standard Stick

Track Belt/Shoe Width
17.70 in
450.00 mm

Dimensions - Long Stick

O/A Undercarriage Length
126.00 in
3200.00 mm

Travel System

Ground Pressure - Minimum Weight
5.00 psi
34.70 kPa

Dimensions - Long Stick

O/A Track Width
97.20 in
2470.00 mm

Dimensions - Standard Stick

O/A Track Width
97.20 in
2470.00 mm

Travel System

Ground Pressure - Maximum Weight
5.40 psi
37.10 kPa

Dimensions - Long Stick

Transport Height
99.00 in
2514.00 mm

Service Refill Capacities

Engine Oil
3.00 gal (US)
11.20 l

Dimensions - Standard Stick

Ground Clearance
14.00 in
356.00 mm

Dimensions - Long Stick

Stick Length
92.80 in
2358.00 mm

Travel System

Travel Speed - High
3.10 mile/h
4.90 km/h

Dimensions - Long Stick

Maximum Blade Height
16.10 in
408.00 mm

Hydraulic System

Digging Force - Stick - Standard
9500.00 lb
42.30 kN

Dimensions - Standard Stick

O/A Shipping Length
265.00 in
6731.00 mm

Hydraulic System

Digging Force - Stick - Long
8023.00 lb
35.70 kN

Dimensions - Long Stick

Maximum Dig Height
277.10 in
7039.00 mm

Hydraulic System

Auxiliary Circuit - Secondary - Pressure
4134.00 psi
285.00 bar

Certification - Cab

Top Guard
ISO 10262:1998 (Level I)

Hydraulic System

Operating Pressure - Travel
4134.00 psi
285.00 bar

Weight Increase from Minimum Configuration

Steel Tracks with Pads
728.00 lb
330.00 kg

Dimensions - Long Stick

Tail Swing with Counterweight
62.40 in
1585.00 mm

Dimensions - Standard Stick

Maximum Reach
281.10 in
7141.00 mm

Dimensions - Long Stick

Maximum Reach
300.70 in
7637.00 mm

Certification - Cab

Tip Over Protective Structure (TOPS)
ISO 12117:1997

Sound

Note
European Union Directive "2000/14/EC"

Weight Increase from Minimum Configuration

Long Stick
146.00 lb
66.00 kg

Dimensions - Long Stick

Cab Height
100.00 in
2541.00 mm

Sound

Operator Sound Pressure (ISO 6396:2008)
72.00 dB(A)
72.00 dB(A)

Service Refill Capacities

Fuel Tank
39.00 gal (US)
147.00 l

Dimensions - Standard Stick

Tail Swing with Counterweight
62.40 in
1585.00 mm

Hydraulic System

Pump Flow at 2,400 rpm
62.00 gal/min
233.00 l/min

Dimensions - Long Stick

Ground Clearance
14.00 in
356.00 mm
Swing Bearing - Height
29.70 in
756.00 mm

Service Refill Capacities

Hydraulic System
29.00 gal (US)
110.00 l

Dimensions - Long Stick

Track Belt/Shoe Width
17.70 in
450.00 mm

Dimensions - Standard Stick

Boom In Reach
120.40 in
3059.00 mm

Travel System

Travel Speed - Low
1.60 mile/h
2.60 km/h

Engine

Rated Net Power - 2,200 rpm - U.S. EPA Tier 4 Final - ISO 9249/EEC 80/1269
70.30 HP
52.40 kW

Dimensions - Long Stick

Boom Swing - Left
23.80 in
604.00 mm

Dimensions - Standard Stick

Vertical Wall
117.80 in
2991.00 mm

Dimensions - Long Stick

Boom Swing - Right
36.80 in
935.00 mm

Hydraulic System

Digging Force - Bucket
13943.00 lb
62.00 kN
Auxiliary Circuit - Primary (High Flow) - Flow
37.00 gal/min
140.00 l/min

Blade

Width - Standard
97.00 in
2470.00 mm

Swing System

Machine Swing Speed
10.60 r/min
10.60 r/min

Travel System

Maximum Traction Force - High Speed
6497.00 lb
28.90 kN

Hydraulic System

Operating Pressure - Equipment
4134.00 psi
285.00 bar

Dimensions - Standard Stick

Dig Depth
161.70 in
4108.00 mm

Travel System

Maximum Traction Force - Low Speed
19064.00 lb
84.80 kN

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.

Dimensions - Long Stick

Tail Swing without Counterweight
57.10 in
1450.00 mm

Weights

Note (2)
**Maximum Weight is based on steel tracks with rubber pads, counterweight, operator, full fuel tank, long stick, blade and no bucket.

Weight Increase from Minimum Configuration

Counterweight
552.00 lb
250.00 kg

Service Refill Capacities

Cooling System
2.60 gal (US)
10.00 l
Hydraulic Tank
14.00 gal (US)
53.00 l

Dimensions - Standard Stick

Stick Length
71.80 in
1820.00 mm

Weights

Minimum Operating Weight with Cab*
19735.00 lb
8950.00 kg

Dimensions - Standard Stick

Boom Swing - Left
23.80 in
604.00 mm
Maximum Blade Height
16.10 in
408.00 mm
Maximum Blade Depth
26.00 in
671.00 mm

Engine

Stroke
4.70 in
120.00 mm

Dimensions - Long Stick

Maximum Reach - Ground Level
293.70 in
7460.00 mm

Specifications

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

Swing System

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

Engine

Gross Power - SAE J1995
74.30 HP
55.40 kW
Rated Net Power - 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269
69.50 HP
51.80 kW

Hydraulic System

Note
Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Maximum Auxiliary Circuit - Secondary - Flow at Pump
9.00 gal/min
33.00 l/min
Maximum Auxiliary Circuit - Secondary - Pressure at Pump
4134.00 psi
285.00 bar
Maximum Auxiliary Circuit - Primary (High Flow) - Flow at Pump
37.00 gal/min
140.00 l/min
Maximum Auxiliary Circuit - Primary (High Flow) - Pressure at Pump
4134.00 psi
285.00 bar

Dimensions - Standard Stick

Note
*Boom Height when stick is pinned in transport position with no attachments.
Overall Shipping Length - without Counterweight
266.70 in
6774.00 mm
Overall Shipping Length - with Counterweight
266.70 in
6774.00 mm
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*
95.70 in
2430.00 mm
Height - Boom Working - With Tools**
104.70 in
2660.00 mm

Dimensions - Long Stick

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*
89.00 in
2260.00 mm
Overall Shipping Length - with Counterweight
7052 mm (277.6 in)***
Height - Boom Working - With Tools**
120.10 in
3050.00 mm
Overall Shipping Length - without Counterweight
7052 mm (277.6 in)***
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 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.
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)
  • 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
Optional Equipment
  • 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)