309 CR Mini Hydraulic Excavator
Mini Excavators Inspired by Our Customers
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More Comfort – More Performance – More Versatility
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4 Industry First Features
Cat Exclusives in a Mini Excavator
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Up to 10% Lower Total Ownership Costs
with improved fuel efficiency and longer service intervals
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Up to 20% More Performance
with customizable operator settings and improvements in lift, swing, travel and multifunction
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Engine
| Bore | 3.7 in |
| Displacement | 203 in³ |
| Engine Model | Cat C3.3B |
| Gross Power - SAE J1995 | 74.3 HP |
| Net Power | 69.5 HP |
| Rated Net Power - 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269 | 69.5 HP |
| Stroke | 4.7 in |
Specifications
| Note | The 309 CR specifications are based on a machine configured with a Long (L) Undercarriage. |
Weights
| Maximum Operating Weight with Cab** | 21091 lb |
| Minimum Operating Weight with Cab* | 19735 lb |
| 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. |
| Operating Weight | 21091 lb |
Dimensions - Long Stick
| Boom In Reach | 126.6 in |
| Boom Swing - Left | 23.8 in |
| Boom Swing - Right | 36.8 in |
| Cab Height | 100 in |
| Dig Depth | 182.8 in |
| Ground Clearance | 14 in |
| Height - Boom Transport - No Tools* | 89 in |
| Height - Boom Working - With Tools** | 120.1 in |
| Maximum Blade Depth | 26 in |
| Maximum Blade Height | 16.1 in |
| Maximum Dig Height | 277.1 in |
| Maximum Dump Clearance | 199.7 in |
| Maximum Reach | 300.7 in |
| Maximum Reach - Ground Level | 293.7 in |
| Note | *Boom Height when stick is pinned in transport position with no attachments. |
| Note (1) | **Boom Height when stick is pinned in working position with attachments Standard Stick offers only one pin position. |
| Note (2) | ***With blade positioned at the rear of the machine. |
| O/A Track Width | 97.2 in |
| O/A Undercarriage Length | 126 in |
| Overall Shipping Length - with Counterweight | 7052 mm (277.6 in)*** |
| Overall Shipping Length - without Counterweight | 7052 mm (277.6 in)*** |
| Stick Length | 92.8 in |
| Swing Bearing - Height | 29.7 in |
| Tail Swing with Counterweight | 62.4 in |
| Tail Swing without Counterweight | 57.1 in |
| Track Belt/Shoe Width | 17.7 in |
| Vertical Wall | 134 in |
Weight Increase from Minimum Configuration
| Counterweight | 552 lb |
| Long Stick | 146 lb |
| Steel Tracks with Pads | 728 lb |
Travel System
| Gradeability - Maximum | 30 degrees |
| Ground Pressure - Maximum Weight | 5.4 psi |
| Ground Pressure - Minimum Weight | 5 psi |
| Maximum Traction Force - High Speed | 6497 lb |
| Maximum Traction Force - Low Speed | 19064 lb |
| Travel Speed - High | 3.1 mile/h |
| Travel Speed - Low | 1.6 mile/h |
Service Refill Capacities
| Cooling System | 2.6 gal (US) |
| Engine Oil | 3 gal (US) |
| Fuel Tank | 39 gal (US) |
| Hydraulic System | 29 gal (US) |
| Hydraulic Tank | 14 gal (US) |
Hydraulic System
| Digging Force - Bucket | 13943 lb |
| Digging Force - Stick - Long | 8023 lb |
| Digging Force - Stick - Standard | 9500 lb |
| Maximum Auxiliary Circuit - High Flow - Flow at Pump | 37 gal/min |
| Maximum Auxiliary Circuit - High Flow - Pressure at Pump | 4134 lbf/in |
| Maximum Auxiliary Circuit - Primary - Flow at Pump | 35 gal/min |
| Maximum Auxiliary Circuit - Primary - Pressure at Pump | 4134 psi |
| Maximum Auxiliary Circuit - Secondary - Flow at Pump | 9 gal/min |
| Maximum Auxiliary Circuit - Secondary - Pressure at Pump | 4134 psi |
| Note | Flow and pressure are not combinable. Under load, as flow rises pressure goes down. |
| Operating Pressure - Equipment | 4134 psi |
| Operating Pressure - Swing | 3626 psi |
| Operating Pressure - Travel | 4134 psi |
| Pump Flow at 2,400 rpm | 62 gal/min |
| Type | Load Sensing Hydraulics with Variable Displacement Piston Pump |
Swing System
| Boom Swing - Left | 60 degrees |
| Boom Swing - Right | 50 degrees |
| Machine Swing Speed | 10.6 r/min |
Blade
| Height | 17 in |
| Width - Standard | 97 in |
| Width - Wide | 104 in |
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 I) |
Sound
| Average Exterior Sound Pressure (ISO 6395:2008) | 99 dB(A) |
| Note | European Union Directive "2000/14/EC" |
| Operator Sound Pressure (ISO 6396:2008) | 72 dB(A) |
Dimensions - Standard Stick
| Boom In Reach | 120.4 in |
| Boom Swing - Left | 23.8 in |
| Boom Swing - Right | 36.8 in |
| Cab Height | 100 in |
| Dig Depth | 161.7 in |
| Ground Clearance | 14 in |
| Height - Boom Transport - No Tools* | 95.7 in |
| Height - Boom Working - With Tools** | 104.7 in |
| Maximum Blade Depth | 26 in |
| Maximum Blade Height | 16.1 in |
| Maximum Dig Height | 265.2 in |
| Maximum Dump Clearance | 187.4 in |
| Maximum Reach | 281.1 in |
| Maximum Reach - Ground Level | 273.6 in |
| Note | *Boom Height when stick is pinned in transport position with no attachments. |
| Note (1) | **Boom Height when stick is pinned in working position with attachments Standard Stick offers only one pin position. |
| Note (2) | ***With blade positioned at the rear of the machine. |
| O/A Track Width | 97.2 in |
| O/A Undercarriage Length | 126 in |
| Overall Shipping Length - with Counterweight | 266.7 in |
| Overall Shipping Length - without Counterweight | 266.7 in |
| Stick Length | 71.8 in |
| Swing Bearing - Height | 29.7 in |
| Tail Swing with Counterweight | 62.4 in |
| Tail Swing without Counterweight | 57.1 in |
| Track Belt/Shoe Width | 17.7 in |
| Vertical Wall | 117.8 in |
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. |
Sustainability
| Recyclability | 96% |
Download resources
309 CR Product Brochure
309 CR Standard Undercarriage Product Brochure
Cat Mini Hydraulic Excavators Product Line Brochure (North America)
Cat Mini Hydraulic Excavators Product Line Brochure (Europe)
Options And Accessories Kit Guide for Mini Hydraulic Excavators
Cat Attachments for Mini Excavators Brochure
Attachment Compatibility Guide for Mini Excavators
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