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.
Weights
- Operating Weight
- 21091lb
- Maximum Operating Weight with Cab**
- 21091lb
- 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*
- 19735lb
Dimensions - Long Stick
- Dig Depth
- 182.8in
- Maximum Dump Clearance
- 199.7in
- Boom In Reach
- 126.6in
- Vertical Wall
- 134in
- Maximum Blade Depth
- 26in
- O/A Undercarriage Length
- 126in
- O/A Track Width
- 97.2in
- Stick Length
- 92.8in
- Maximum Blade Height
- 16.1in
- Maximum Dig Height
- 277.1in
- Tail Swing with Counterweight
- 62.4in
- Maximum Reach
- 300.7in
- Cab Height
- 100in
- Ground Clearance
- 14in
- Swing Bearing - Height
- 29.7in
- Track Belt/Shoe Width
- 17.7in
- Boom Swing - Left
- 23.8in
- Boom Swing - Right
- 36.8in
- Tail Swing without Counterweight
- 57.1in
- Maximum Reach - Ground Level
- 293.7in
- 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*
- 89in
- Overall Shipping Length - with Counterweight
- 7052 mm (277.6 in)***
- Height - Boom Working - With Tools**
- 120.1in
- Overall Shipping Length - without Counterweight
- 7052 mm (277.6 in)***
Engine
- Engine Model
- Cat C3.3B
- Rated Net Power - 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269
- 69.5HP
- Displacement
- 203in³
- Bore
- 3.7in
- Stroke
- 4.7in
- Gross Power - SAE J1995
- 74.3HP
Blade
- Height
- 17in
- Width - Wide
- 104in
- Width - Standard
- 97in
Dimensions - Standard Stick
- Note
- *Boom Height when stick is pinned in transport position with no attachments.
- Boom Swing - Right
- 36.8in
- Maximum Dump Clearance
- 187.4in
- Tail Swing without Counterweight
- 57.1in
- Maximum Reach - Ground Level
- 273.6in
- O/A Undercarriage Length
- 126in
- Cab Height
- 100in
- Swing Bearing - Height
- 29.7in
- Maximum Dig Height
- 265.2in
- Track Belt/Shoe Width
- 17.7in
- O/A Track Width
- 97.2in
- Ground Clearance
- 14in
- Maximum Reach
- 281.1in
- Tail Swing with Counterweight
- 62.4in
- Boom In Reach
- 120.4in
- Vertical Wall
- 117.8in
- Dig Depth
- 161.7in
- Stick Length
- 71.8in
- Boom Swing - Left
- 23.8in
- Maximum Blade Height
- 16.1in
- Maximum Blade Depth
- 26in
- Overall Shipping Length - without Counterweight
- 266.7in
- Overall Shipping Length - with Counterweight
- 266.7in
- 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*
- 95.7in
- Height - Boom Working - With Tools**
- 104.7in
Hydraulic System
- Maximum Auxiliary Circuit - Primary (High Flow) - Pressure at Pump
- 4134psi
- Maximum Auxiliary Circuit - Primary (High Flow) - Flow at Pump
- 37gal/min
- Maximum Auxiliary Circuit - Secondary - Pressure at Pump
- 4134psi
- Maximum Auxiliary Circuit - Secondary - Flow at Pump
- 9gal/min
- Note
- Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
- Type
- Load Sensing Hydraulics with Variable Displacement Piston Pump
- Operating Pressure - Swing
- 3626psi
- Digging Force - Stick - Standard
- 9500lb
- Digging Force - Stick - Long
- 8023lb
- Operating Pressure - Travel
- 4134psi
- Pump Flow at 2,400 rpm
- 62gal/min
- Digging Force - Bucket
- 13943lb
- Operating Pressure - Equipment
- 4134psi
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)
Travel System
- Gradeability - Maximum
- 30 degrees
- Ground Pressure - Minimum Weight
- 5psi
- Ground Pressure - Maximum Weight
- 5.4psi
- Travel Speed - High
- 3.1mile/h
- Travel Speed - Low
- 1.6mile/h
- Maximum Traction Force - High Speed
- 6497lb
- Maximum Traction Force - Low Speed
- 19064lb
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
- 3gal (US)
- Fuel Tank
- 39gal (US)
- Hydraulic System
- 29gal (US)
- Cooling System
- 2.6gal (US)
- Hydraulic Tank
- 14gal (US)
Weight Increase from Minimum Configuration
- Steel Tracks with Pads
- 728lb
- Long Stick
- 146lb
- Counterweight
- 552lb
Swing System
- Machine Swing Speed
- 10.6r/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.