Cat Mini Excavator 309 CR
Product Feature
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 machines.
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.
Product Parameter
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
Units:
| Engine Model | Cat C3.3B Cat C3.3B | More |
| Net Power | 70.3 HP 52.4 kW | More |
| Bore | 3.7 in 94.0 mm | More |
| Displacement | 203.0 in³ 3.33 l | More |
| Gross Power - ISO 14396 | 74.3 HP 55.4 kW | More |
| Rated Net Power - 2,200 rpm - EU Stage V - ISO 9249/EEC 80/1269 | 71.5 HP 53.3 kW | More |
| Rated Net Power - 2,200 rpm - U.S. EPA Tier 4 Final - ISO 9249/EEC 80/1269 | 70.3 HP 52.4 kW | More |
| Stroke | 4.7 in 120.0 mm | More |
Weights
| Operating Weight | 20731.0 lb 9403.0 kg | More |
| Maximum Operating Weight with Cab** | 20731.0 lb 9403.0 kg | More |
| Minimum Operating Weight with Cab* | 19304.0 lb 8756.0 kg | More |
| Note (1) | *Minimum Weight is based on steel tracks, no counterweight, operator, full fuel tank, standard stick, blade and no bucket. *Minimum Weight is based on steel tracks, no counterweight, operator, full fuel tank, standard stick, blade and no bucket. | More |
| Note (2) | **Maximum Weight is based on steel tracks with rubber pads, counterweight, operator, full fuel tank, long stick, blade and no bucket. **Maximum Weight is based on steel tracks with rubber pads, counterweight, operator, full fuel tank, long stick, blade and no bucket. | More |
Blade
| Height | 17.0 in 431.0 mm | More |
| Width - Standard | 97.2 in 2470.0 mm | More |
| Width - Wide | 103.9 in 2640.0 mm | More |
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. 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. | More |
Certification - Cab
| Roll Over Protective Structure (ROPS) | ISO 12117-2:2008 ISO 12117-2:2008 | More |
| Tip Over Protective Structure (TOPS) | ISO 12117:1997 ISO 12117:1997 | More |
| Top Guard | ISO 10262:1998 (Level II) ISO 10262:1998 (Level II) | More |
Dimensions - Long Stick
| Boom In Reach | 126.6 in 3215.0 mm | More |
| Boom Swing - Left | 24.0 in 604.0 mm | More |
| Boom Swing - Right | 37.0 in 935.0 mm | More |
| Cab Height | 99.0 in 2514.0 mm | More |
| Dig Depth | 183.1 in 4650.0 mm | More |
| Ground Clearance | 13.5 in 343.0 mm | More |
| Maximum Blade Depth | 26.9 in 684.0 mm | More |
| Maximum Blade Height | 13.5 in 342.0 mm | More |
| Maximum Dig Height | 276.8 in 7032.0 mm | More |
| Maximum Dump Clearance | 199.4 in 5065.0 mm | More |
| Maximum Reach | 300.7 in 7637.0 mm | More |
| Maximum Reach - Ground Level | 293.8 in 7462.0 mm | More |
| O/A Shipping Length | 262.3 in 6662.0 mm | More |
| O/A Track Width | 97.2 in 2470.0 mm | More |
| O/A Undercarriage Length | 126.0 in 3200.0 mm | More |
| Stick Length | 92.8 in 2358.0 mm | More |
| Swing Bearing - Height | 28.7 in 729.0 mm | More |
| Tail Swing with Counterweight | 64.8 in 1645.0 mm | More |
| Tail Swing without Counterweight | 57.1 in 1450.0 mm | More |
| Track Belt/Shoe Width | 17.7 in 450.0 mm | More |
| Transport Height | 99.0 in 2514.0 mm | More |
| Vertical Wall | 134.3 in 3411.0 mm | More |
Dimensions - Standard Stick
| Boom In Reach | 120.4 in 3058.0 mm | More |
| Boom Swing - Left | 24.0 in 604.0 mm | More |
| Boom Swing - Right | 37.0 in 935.0 mm | More |
| Cab Height | 99.0 in 2514.0 mm | More |
| Dig Depth | 162.0 in 4115.0 mm | More |
| Ground Clearance | 13.5 in 343.0 mm | More |
| Maximum Blade Depth | 26.9 in 684.0 mm | More |
| Maximum Blade Height | 13.5 in 342.0 mm | More |
| Maximum Dig Height | 264.9 in 6729.0 mm | More |
| Maximum Dump Clearance | 187.1 in 4753.0 mm | More |
| Maximum Reach | 281.1 in 7140.0 mm | More |
| Maximum Reach - Ground Level | 273.6 in 6951.0 mm | More |
| O/A Shipping Length | 259.0 in 6578.0 mm | More |
| O/A Track Width | 97.2 in 2470.0 mm | More |
| O/A Undercarriage Length | 126.0 in 3200.0 mm | More |
| Stick Length | 71.8 in 1823.0 mm | More |
| Swing Bearing - Height | 28.7 in 729.0 mm | More |
| Tail Swing with Counterweight | 64.8 in 1645.0 mm | More |
| Tail Swing without Counterweight | 57.1 in 1450.0 mm | More |
| Track Belt/Shoe Width | 17.7 in 450.0 mm | More |
| Transport Height | 97.9 in 2487.0 mm | More |
| Vertical Wall | 118.0 in 2998.0 mm | More |
Hydraulic System
| Auxiliary Circuit - Primary (High Flow) - Flow | 37.0 gal/min 140.0 l/min | More |
| Auxiliary Circuit - Primary (High Flow) - Pressure | 4134.0 psi 285.0 bar | More |
| Auxiliary Circuit - Secondary - Flow | 9.0 gal/min 33.0 l/min | More |
| Auxiliary Circuit - Secondary - Pressure | 4134.0 psi 285.0 bar | More |
| Digging Force - Bucket | 13943.0 lb 62.0 kN | More |
| Digging Force - Stick - Long | 8023.0 lb 35.7 kN | More |
| Digging Force - Stick - Standard | 9500.0 lb 42.3 kN | More |
| Operating Pressure - Equipment | 4134.0 psi 285.0 bar | More |
| Operating Pressure - Swing | 3626.0 psi 250.0 bar | More |
| Operating Pressure - Travel | 4134.0 psi 285.0 bar | More |
| Pump Flow at 2,400 rpm | 62.0 gal/min 233.0 l/min | More |
| Type | Load Sensing Hydraulics with Variable Displacement Piston Pump Load Sensing Hydraulics with Variable Displacement Piston Pump | More |
Service Refill Capacities
| Cooling System | 2.6 gal (US) 10.0 l | More |
| Engine Oil | 3.0 gal (US) 11.2 l | More |
| Fuel Tank | 39.0 gal (US) 147.0 l | More |
| Hydraulic System | 28.0 gal (US) 107.0 l | More |
| Hydraulic Tank | 14.0 gal (US) 53.0 l | More |
Sound
| Average Exterior Sound Pressure (ISO 6395:2008) | 99.0 dB(A) 99.0 dB(A) | More |
| Note | European Union Directive “2000/14/EC” European Union Directive “2000/14/EC” | More |
| Operator Sound Pressure (ISO 6396:2008) | 72.0 dB(A) 72.0 dB(A) | More |
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. 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. | More |
Swing System
| Machine Swing Speed | 10.6 r/min 10.6 r/min | More |
Travel System
| Gradeability - Maximum | 30 degrees 30 degrees | More |
| Ground Pressure - Maximum Weight | 6.0 psi 40.8 kPa | More |
| Ground Pressure - Minimum Weight | 6.0 psi 38.0 kPa | More |
| Maximum Traction Force - High Speed | 6497.0 lb 28.9 kN | More |
| Maximum Traction Force - Low Speed | 19064.0 lb 84.8 kN | More |
| Travel Speed - High | 3.1 mile/h 4.9 km/h | More |
| Travel Speed - Low | 1.6 mile/h 2.6 km/h | More |
Weight Increase from Minimum Configuration
| Counterweight | 552.0 lb 250.0 kg | More |
| Long Stick | 146.0 lb 66.0 kg | More |
| Steel Tracks with Pads | 728.0 lb |
