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Key Specs
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.The 309 CR also features high flow hydraulics to handle power hungry attachments such as mulchers and brushcutters.
Cat Exclusives in a Mini Excavator
with improved fuel efficiency and longer service intervals
with customizable operator settings and improvements in lift, swing, travel and multifunction
| Net Power | 69.5 hp 51.8 kW |
| Engine Model | Cat C3.3B Cat C3.3B |
| Displacement | 203 in³ 3.33 l |
| Bore | 3.7 in 94 mm |
| Stroke | 4.7 in 120 mm |
| Gross Power - SAE J1995 | 74.3 hp 55.4 kW |
| Rated Net Power - 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269 | 69.5 hp 51.8 kW |
| Note | The 309 CR specifications are based on a machine configured with a Long (L) Undercarriage. The 309 CR specifications are based on a machine configured with a Long (L) Undercarriage. |
| Operating Weight | 21091 lb 9565 kg |
| Maximum Operating Weight with Cab** | 21091 lb 9565 kg |
| 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. |
| 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. |
| Minimum Operating Weight with Cab* | 19735 lb 8950 kg |
| Dig Depth | 182.8 in 4642 mm |
| Maximum Dump Clearance | 199.7 in 5072 mm |
| Boom In Reach | 126.6 in 3215 mm |
| Vertical Wall | 134 in 3404 mm |
| Maximum Blade Depth | 26 in 671 mm |
| O/A Undercarriage Length | 126 in 3200 mm |
| O/A Track Width | 97.2 in 2470 mm |
| Stick Length | 92.8 in 2358 mm |
| Maximum Blade Height | 16.1 in 408 mm |
| Maximum Dig Height | 277.1 in 7039 mm |
| Tail Swing with Counterweight | 62.4 in 1585 mm |
| Maximum Reach | 300.7 in 7637 mm |
| Cab Height | 100 in 2541 mm |
| Ground Clearance | 14 in 356 mm |
| Swing Bearing - Height | 29.7 in 756 mm |
| Track Belt/Shoe Width | 17.7 in 450 mm |
| Boom Swing - Left | 23.8 in 604 mm |
| Boom Swing - Right | 36.8 in 935 mm |
| Tail Swing without Counterweight | 57.1 in 1450 mm |
| Maximum Reach - Ground Level | 293.7 in 7460 mm |
| Note | *Boom Height when stick is pinned in transport position with no attachments. *Boom Height when stick is pinned in transport position with no attachments. |
| Note (2) | ***With blade positioned at the rear of the machine. ***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. **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 2260 mm |
| Overall Shipping Length - with Counterweight | 7052 mm (277.6 in)*** 7052 mm (277.6 in)*** |
| Height - Boom Working - With Tools** | 120.1 in 3050 mm |
| Overall Shipping Length - without Counterweight | 7052 mm (277.6 in)*** 7052 mm (277.6 in)*** |
| Steel Tracks with Pads | 728 lb 330 kg |
| Long Stick | 146 lb 66 kg |
| Counterweight | 552 lb 250 kg |
| Gradeability - Maximum | 30 degrees 30 degrees |
| Ground Pressure - Minimum Weight | 5 psi 34.7 kPa |
| Ground Pressure - Maximum Weight | 5.4 psi 37.1 kPa |
| Travel Speed - High | 3.1 mile/h 4.9 km/h |
| Travel Speed - Low | 1.6 mile/h 2.6 km/h |
| Maximum Traction Force - High Speed | 6497 lb 28.9 kN |
| Maximum Traction Force - Low Speed | 19064 lb 84.8 kN |
| Engine Oil | 3 gal (US) 11.2 l |
| Fuel Tank | 39 gal (US) 147 l |
| Hydraulic System | 29 gal (US) 110 l |
| Cooling System | 2.6 gal (US) 10 l |
| Hydraulic Tank | 14 gal (US) 53 l |
| Type | Load Sensing Hydraulics with Variable Displacement Piston Pump Load Sensing Hydraulics with Variable Displacement Piston Pump |
| Operating Pressure - Swing | 3626 psi 250 bar |
| Digging Force - Stick - Standard | 9500 lb 42.3 kN |
| Digging Force - Stick - Long | 8023 lb 35.7 kN |
| Operating Pressure - Travel | 4134 psi 285 bar |
| Pump Flow at 2,400 rpm | 62 gal/min 233 l/min |
| Digging Force - Bucket | 13943 lb 62 kN |
| Operating Pressure - Equipment | 4134 psi 285 bar |
| Note | Flow and pressure are not combinable. Under load, as flow rises pressure goes down. Flow and pressure are not combinable. Under load, as flow rises pressure goes down. |
| Maximum Auxiliary Circuit - Secondary - Flow at Pump | 9 gal/min 33 l/min |
| Maximum Auxiliary Circuit - Primary - Pressure at Pump | 4134 psi 285 bar |
| Maximum Auxiliary Circuit - Primary - Flow at Pump | 35 gal/min 131 l/min |
| Maximum Auxiliary Circuit - Secondary - Pressure at Pump | 4134 psi 285 bar |
| Maximum Auxiliary Circuit - High Flow - Pressure at Pump | 4134 lbf/in 285 bar |
| Maximum Auxiliary Circuit - High Flow - Flow at Pump | 37 gal/min 140 l/min |
| Machine Swing Speed | 10.6 r/min 10.6 r/min |
| Boom Swing - Right | 50 degrees 50 degrees |
| Boom Swing - Left | 60 degrees 60 degrees |
| Height | 17 in 431 mm |
| Width - Wide | 104 in 2640 mm |
| Width - Standard | 97 in 2470 mm |
| Roll Over Protective Structure (ROPS) | ISO 12117-2:2008 ISO 12117-2:2008 |
| Top Guard | ISO 10262:1998 (Level I) ISO 10262:1998 (Level I) |
| Tip Over Protective Structure (TOPS) | ISO 12117:1997 ISO 12117:1997 |
| Average Exterior Sound Pressure (ISO 6395:2008) | 99 dB(A) 99 dB(A) |
| Note | European Union Directive "2000/14/EC" European Union Directive "2000/14/EC" |
| Operator Sound Pressure (ISO 6396:2008) | 72 dB(A) 72 dB(A) |
| Boom Swing - Right | 36.8 in 935 mm |
| Maximum Dump Clearance | 187.4 in 4760 mm |
| Tail Swing without Counterweight | 57.1 in 1450 mm |
| Maximum Reach - Ground Level | 273.6 in 6949 mm |
| O/A Undercarriage Length | 126 in 3200 mm |
| Cab Height | 100 in 2541 mm |
| Swing Bearing - Height | 29.7 in 756 mm |
| Maximum Dig Height | 265.2 in 6736 mm |
| Track Belt/Shoe Width | 17.7 in 450 mm |
| O/A Track Width | 97.2 in 2470 mm |
| Ground Clearance | 14 in 356 mm |
| Maximum Reach | 281.1 in 7141 mm |
| Tail Swing with Counterweight | 62.4 in 1585 mm |
| Boom In Reach | 120.4 in 3059 mm |
| Vertical Wall | 117.8 in 2991 mm |
| Dig Depth | 161.7 in 4108 mm |
| Stick Length | 71.8 in 1820 mm |
| Boom Swing - Left | 23.8 in 604 mm |
| Maximum Blade Height | 16.1 in 408 mm |
| Maximum Blade Depth | 26 in 671 mm |
| Note | *Boom Height when stick is pinned in transport position with no attachments. *Boom Height when stick is pinned in transport position with no attachments. |
| Overall Shipping Length - without Counterweight | 266.7 in 6774 mm |
| Overall Shipping Length - with Counterweight | 266.7 in 6774 mm |
| Note (2) | ***With blade positioned at the rear of the machine. ***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. **Boom Height when stick is pinned in working position with attachments Standard Stick offers only one pin position. |
| Height - Boom Transport - No Tools* | 95.7 in 2430 mm |
| Height - Boom Working - With Tools** | 104.7 in 2660 mm |
| Air Conditioning | The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1 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 kg of refrigerant which has a CO2 equivalent of 1.430 metric tonnes. |
| Recyclability | 96% 96% |
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Compare All ModelsCaterpillar product brochures and other informational documents are available for your growing business.
309 CR Mini Hydraulic Excavator
309 CR Mini Hydraulic Excavator
309 CR Mini Hydraulic Excavator
309 CR Mini Hydraulic Excavator
Front View
Top View
Left View
Rear View
Bottom View
Right View
309 CR Mini Hydraulic Excavator
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Leverage Caterpillar connected data and security principles to improve efficiencies, increase productivity and make your business more profitable.
VisionLink® is a cloud-based software application that takes the guesswork out of fleet management with key insights to maximize performance - regardless of fleet size or equipment manufacturer. Receive equipment data seamlessly to your desktop or mobile device, all from a convenient centralized solution to make informed decisions at every turn.
VisionLink® is a cloud-based software application that takes the guesswork out of fleet management with key insights to maximize performance - regardless of fleet size or equipment manufacturer. Receive equipment data seamlessly to your desktop or mobile device, all from a convenient centralized solution to make informed decisions at every turn.
