The Cat® 309 CR Variable Angle Boom (VAB) Mini Excavator delivers maximum power and performance in a mini size to help you work in a wide range of applications. The Variable Angle Boom provides the maximum in linkage flexibility in tight 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 | 70.3 HP 52.4 kW |
| Engine Model | Cat C3.3B Cat C3.3B |
| Rated Net Power - 2,200 rpm - EU Stage V - ISO 9249/EEC 80/1269 | 71.5 HP 53.3 kW |
| Gross Power - ISO 14396 | 74.3 HP 55.4 kW |
| Displacement | 203 in³ 3.33 l |
| Rated Net Power - 2,200 rpm - U.S. EPA Tier 4 Final - ISO 9249/EEC 80/1269 | 70.3 HP 52.4 kW |
| Stroke | 4.7 in 120 mm |
| Bore | 3.7 in 94 mm |
| Operating Weight | 20731 lb 9403 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. |
| Maximum Operating Weight with Cab* | 21054 lb 9550 kg |
| Maximum Operating Weight with Cab** | 20731 lb 9403 kg |
| Minimum Operating Weight with Cab* | 19304 lb 8756 kg |
| Note | *Maximum Weight is based on steel tracks with rubber pads, counterweight, operator, full fuel tank, standard stick, blade and no bucket. *Maximum Weight is based on steel tracks with rubber pads, 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. |
| Dig Depth | 154.8 in 3931 mm |
| Cab Height | 99 in 2514 mm |
| Maximum Blade Depth | 26.9 in 684 mm |
| Maximum Blade Height | 13.5 in 342 mm |
| Stick Length | 71.8 in 1823 mm |
| Maximum Reach | 260.3 in 6612 mm |
| Tail Swing without Counterweight | 57.1 in 1450 mm |
| Vertical Wall | 133.6 in 3394 mm |
| Swing Bearing Height | 31.4 in 798 mm |
| Track Belt/Shoe Width | 17.7 in 450 mm |
| Boom Swing Right | 37 in 935 mm |
| Overall Track Width | 97.2 in 2470 mm |
| Overall Shipping Length | 227.2 in 5771 mm |
| Maximum Dump Clearance | 143.4 in 3643 mm |
| Boom in Reach | 112.3 in 2853 mm |
| Maximum Reach at Ground Level | 252.1 in 6403 mm |
| Transport Height | 99.6 in 2530 mm |
| Overall Undercarriage Length | 126 in 3200 mm |
| Ground Clearance | 13.5 in 343 mm |
| Tail Swing with Counterweight | 64.8 in 1645 mm |
| Maximum Dig Height | 216.3 in 5494 mm |
| Boom Swing Left | 24 in 604 mm |
| Height | 17 in 431 mm |
| Width - Wide | 103.9 in 2640 mm |
| Width - Standard | 97.2 in 2470 mm |
| Operating Pressure - Travel | 4134 psi 285 bar |
| Auxiliary Circuit - Secondary - Flow | 9 gal/min 33 l/min |
| Auxiliary Circuit - Primary (High Flow) - Pressure | 4134 psi 285 bar |
| Type | Load Sensing Hydraulics with Variable Displacement Piston Pump Load Sensing Hydraulics with Variable Displacement Piston Pump |
| Digging Force - Stick - Standard | 9500 lb 42.3 kN |
| Auxiliary Circuit - Secondary - Pressure | 4134 psi 285 bar |
| Digging Force - Stick - Long | 8023 lb 35.7 kN |
| Digging Force - Bucket | 13943 lb 62 kN |
| Pump Flow at 2,400 rpm | 62 gal/min 233 l/min |
| Auxiliary Circuit - Primary (High Flow) - Flow | 37 gal/min 140 l/min |
| Operating Pressure - Swing | 3626 psi 250 bar |
| Operating Pressure - Equipment | 4134 psi 285 bar |
| Boom Swing - Right | 37 in 935 mm |
| Boom Swing - Left | 24 in 604 mm |
| Dig Depth | 183.1 in 4650 mm |
| Stick Length | 92.8 in 2358 mm |
| Maximum Reach - Ground Level | 293.8 in 7462 mm |
| Maximum Blade Height | 13.5 in 342 mm |
| Cab Height | 99 in 2514 mm |
| Transport Height | 99 in 2514 mm |
| Boom In Reach | 126.6 in 3215 mm |
| O/A Track Width | 97.2 in 2470 mm |
| Ground Clearance | 13.5 in 343 mm |
| Swing Bearing - Height | 28.7 in 729 mm |
| Tail Swing without Counterweight | 57.1 in 1450 mm |
| Tail Swing with Counterweight | 64.8 in 1645 mm |
| Maximum Reach | 300.7 in 7637 mm |
| Track Belt/Shoe Width | 17.7 in 450 mm |
| Vertical Wall | 134.3 in 3411 mm |
| O/A Undercarriage Length | 126 in 3200 mm |
| O/A Shipping Length | 262.3 in 6662 mm |
| Maximum Dig Height | 276.8 in 7032 mm |
| Maximum Dump Clearance | 199.4 in 5065 mm |
| Maximum Blade Depth | 26.9 in 684 mm |
| Ground Clearance | 13.5 in 343 mm |
| Cab Height | 99 in 2514 mm |
| Boom in Reach | 117.9 in 2995 mm |
| Vertical Wall | 138.7 in 3524 mm |
| Swing Bearing Height | 31.4 in 798 mm |
| Maximum Dump Clearance | 251.6 in 6390 mm |
| Overall Undercarriage Length | 126 in 3200 mm |
| Maximum Reach at Ground Level | 304.4 in 7732 mm |
| Tail Swing without Counterweight | 57.1 in 1450 mm |
| Maximum Reach | 311 in 7900 mm |
| Track Belt/Shoe Width | 17.7 in 450 mm |
| Overall Shipping Length | 281.8 in 7158 mm |
| Maximum Blade Depth | 26.9 in 684 mm |
| Maximum Dig Height | 321.7 in 8171 mm |
| Overall Track Width | 97.2 in 2470 mm |
| Tail Swing with Counterweight | 64.8 in 1645 mm |
| Stick Length | 71.8 in 1823 mm |
| Maximum Blade Height | 13.5 in 342 mm |
| Boom Swing Right | 37 in 935 mm |
| Boom Swing Left | 24 in 604 mm |
| Transport Height | 96.5 in 2452 mm |
| Dig Depth | 136.5 in 3468 mm |
| Maximum Reach - Ground Level | 273.6 in 6951 mm |
| Swing Bearing - Height | 28.7 in 729 mm |
| Stick Length | 71.8 in 1823 mm |
| O/A Shipping Length | 259 in 6578 mm |
| Maximum Blade Height | 13.5 in 342 mm |
| Boom In Reach | 120.4 in 3058 mm |
| Tail Swing with Counterweight | 64.8 in 1645 mm |
| Vertical Wall | 118 in 2998 mm |
| Maximum Blade Depth | 26.9 in 684 mm |
| Ground Clearance | 13.5 in 343 mm |
| Maximum Reach | 281.1 in 7140 mm |
| Transport Height | 97.9 in 2487 mm |
| Cab Height | 99 in 2514 mm |
| Boom Swing - Left | 24 in 604 mm |
| O/A Track Width | 97.2 in 2470 mm |
| Boom Swing - Right | 37 in 935 mm |
| Maximum Dig Height | 264.9 in 6729 mm |
| Tail Swing without Counterweight | 57.1 in 1450 mm |
| Dig Depth | 162 in 4115 mm |
| Maximum Dump Clearance | 187.1 in 4753 mm |
| Track Belt/Shoe Width | 17.7 in 450 mm |
| O/A Undercarriage Length | 126 in 3200 mm |
| Ground Pressure - Minimum Weight | 6 psi 38 kPa |
| Travel Speed - High | 3.1 mile/h 4.9 km/h |
| Maximum Traction Force - High Speed | 6497 lb 28.9 kN |
| Travel Speed - Low | 1.6 mile/h 2.6 km/h |
| Ground Pressure - Maximum Weight | 6 psi 40.8 kPa |
| Maximum Traction Force - Low Speed | 19064 lb 84.8 kN |
| Gradeability - Maximum | 30 degrees 30 degrees |
| Fuel Tank | 39 gal (US) 147 l |
| Hydraulic System | 28 gal (US) 107 l |
| Engine Oil | 3 gal (US) 11.2 l |
| Cooling System | 2.6 gal (US) 10 l |
| Hydraulic Tank | 14 gal (US) 53 l |
| Machine Swing Speed | 10.6 r/min 10.6 r/min |
| Steel Tracks with Pads | 728 lb 330 kg |
| Long Stick | 146 lb 66 kg |
| Counterweight | 552 lb 250 kg |
| 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. |
| Top Guard | ISO 10262:1998 (Level II) ISO 10262:1998 (Level II) |
| Roll Over Protective Structure (ROPS) | ISO 12117-2:2008 ISO 12117-2:2008 |
| Tip Over Protective Structure (TOPS) | ISO 12117:1997 ISO 12117:1997 |
| Average Exterior Sound Pressure (ISO 6395:2008) | 99 dB(A) 99 dB(A) |
| Operator Sound Pressure (ISO 6396:2008) | 72 dB(A) 72 dB(A) |
| Note | European Union Directive “2000/14/EC” European Union Directive “2000/14/EC” |
| 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. |
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Efficient equipment management starts with the Cat App. Track the location and health of your equipment, order service and parts, and activate telematics devices directly from your mobile device. Staying on top of your fleet 24/7 has never been easier.
Cat® Inspect allows you to access your equipment data on your mobile device. This easy-to-use app lets you capture inspection data and integrates with your other Cat data systems, so you can keep a close eye on your fleet. More than one million inspections are completed each year, providing convenience and accountability to equipment owners.
Cat® Product Link™ wirelessly connects you to your equipment giving you valuable insight into how your machine or fleet is performing. Information such as location, hours, fuel usage, productivity, idle time, and diagnostic codes are made available through online web applications so that you can make timely, fact-based decisions to maximize efficiency, improve productivity, and lower the cost of owning and operating your fleet. Available with satellite or cellular connectivity.
My.Cat.Com is the web-based hub for digital equipment management, giving you an easy way to take in complex information. Monitor cost, utilization, reliability, age information and other critical data needed to run a business more efficiently and effectively. Access your equipment information and connect with your Cat dealer – all in one place.
