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 | 203.0 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 120.0 mm |
| Bore | 3.7 in 94.0 mm |
| Operating Weight | 20731.0 lb 9403.0 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* | 21054.0 lb 9550.0 kg |
| Maximum Operating Weight with Cab** | 20731.0 lb 9403.0 kg |
| Minimum Operating Weight with Cab* | 19304.0 lb 8756.0 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 3931.0 mm |
| Cab Height | 99.0 in 2514.0 mm |
| Maximum Blade Depth | 26.9 in 684.0 mm |
| Maximum Blade Height | 13.5 in 342.0 mm |
| Stick Length | 71.8 in 1823.0 mm |
| Maximum Reach | 260.3 in 6612.0 mm |
| Tail Swing without Counterweight | 57.1 in 1450.0 mm |
| Vertical Wall | 133.6 in 3394.0 mm |
| Swing Bearing Height | 31.4 in 798.0 mm |
| Track Belt/Shoe Width | 17.7 in 450.0 mm |
| Boom Swing Right | 37.0 in 935.0 mm |
| Overall Track Width | 97.2 in 2470.0 mm |
| Overall Shipping Length | 227.2 in 5771.0 mm |
| Maximum Dump Clearance | 143.4 in 3643.0 mm |
| Boom in Reach | 112.3 in 2853.0 mm |
| Maximum Reach at Ground Level | 252.1 in 6403.0 mm |
| Transport Height | 99.6 in 2530.0 mm |
| Overall Undercarriage Length | 126.0 in 3200.0 mm |
| Ground Clearance | 13.5 in 343.0 mm |
| Tail Swing with Counterweight | 64.8 in 1645.0 mm |
| Maximum Dig Height | 216.3 in 5494.0 mm |
| Boom Swing Left | 24.0 in 604.0 mm |
| Height | 17.0 in 431.0 mm |
| Width - Wide | 103.9 in 2640.0 mm |
| Width - Standard | 97.2 in 2470.0 mm |
| Operating Pressure - Travel | 4134.0 psi 285.0 bar |
| Auxiliary Circuit - Secondary - Flow | 9.0 gal/min 33.0 l/min |
| Auxiliary Circuit - Primary (High Flow) - Pressure | 4134.0 psi 285.0 bar |
| Type | Load Sensing Hydraulics with Variable Displacement Piston Pump Load Sensing Hydraulics with Variable Displacement Piston Pump |
| Digging Force - Stick - Standard | 9500.0 lb 42.3 kN |
| Auxiliary Circuit - Secondary - Pressure | 4134.0 psi 285.0 bar |
| Digging Force - Stick - Long | 8023.0 lb 35.7 kN |
| Digging Force - Bucket | 13943.0 lb 62.0 kN |
| Pump Flow at 2,400 rpm | 62.0 gal/min 233.0 l/min |
| Auxiliary Circuit - Primary (High Flow) - Flow | 37.0 gal/min 140.0 l/min |
| Operating Pressure - Swing | 3626.0 psi 250.0 bar |
| Operating Pressure - Equipment | 4134.0 psi 285.0 bar |
| Boom Swing - Right | 37.0 in 935.0 mm |
| Boom Swing - Left | 24.0 in 604.0 mm |
| Dig Depth | 183.1 in 4650.0 mm |
| Stick Length | 92.8 in 2358.0 mm |
| Maximum Reach - Ground Level | 293.8 in 7462.0 mm |
| Maximum Blade Height | 13.5 in 342.0 mm |
| Cab Height | 99.0 in 2514.0 mm |
| Transport Height | 99.0 in 2514.0 mm |
| Boom In Reach | 126.6 in 3215.0 mm |
| O/A Track Width | 97.2 in 2470.0 mm |
| Ground Clearance | 13.5 in 343.0 mm |
| Swing Bearing - Height | 28.7 in 729.0 mm |
| Tail Swing without Counterweight | 57.1 in 1450.0 mm |
| Tail Swing with Counterweight | 64.8 in 1645.0 mm |
| Maximum Reach | 300.7 in 7637.0 mm |
| Track Belt/Shoe Width | 17.7 in 450.0 mm |
| Vertical Wall | 134.3 in 3411.0 mm |
| O/A Undercarriage Length | 126.0 in 3200.0 mm |
| O/A Shipping Length | 262.3 in 6662.0 mm |
| Maximum Dig Height | 276.8 in 7032.0 mm |
| Maximum Dump Clearance | 199.4 in 5065.0 mm |
| Maximum Blade Depth | 26.9 in 684.0 mm |
| Ground Clearance | 13.5 in 343.0 mm |
| Cab Height | 99.0 in 2514.0 mm |
| Boom in Reach | 117.9 in 2995.0 mm |
| Vertical Wall | 138.7 in 3524.0 mm |
| Swing Bearing Height | 31.4 in 798.0 mm |
| Maximum Dump Clearance | 251.6 in 6390.0 mm |
| Overall Undercarriage Length | 126.0 in 3200.0 mm |
| Maximum Reach at Ground Level | 304.4 in 7732.0 mm |
| Tail Swing without Counterweight | 57.1 in 1450.0 mm |
| Maximum Reach | 311.0 in 7900.0 mm |
| Track Belt/Shoe Width | 17.7 in 450.0 mm |
| Overall Shipping Length | 281.8 in 7158.0 mm |
| Maximum Blade Depth | 26.9 in 684.0 mm |
| Maximum Dig Height | 321.7 in 8171.0 mm |
| Overall Track Width | 97.2 in 2470.0 mm |
| Tail Swing with Counterweight | 64.8 in 1645.0 mm |
| Stick Length | 71.8 in 1823.0 mm |
| Maximum Blade Height | 13.5 in 342.0 mm |
| Boom Swing Right | 37.0 in 935.0 mm |
| Boom Swing Left | 24.0 in 604.0 mm |
| Transport Height | 96.5 in 2452.0 mm |
| Dig Depth | 136.5 in 3468.0 mm |
| Maximum Reach - Ground Level | 273.6 in 6951.0 mm |
| Swing Bearing - Height | 28.7 in 729.0 mm |
| Stick Length | 71.8 in 1823.0 mm |
| O/A Shipping Length | 259.0 in 6578.0 mm |
| Maximum Blade Height | 13.5 in 342.0 mm |
| Boom In Reach | 120.4 in 3058.0 mm |
| Tail Swing with Counterweight | 64.8 in 1645.0 mm |
| Vertical Wall | 118.0 in 2998.0 mm |
| Maximum Blade Depth | 26.9 in 684.0 mm |
| Ground Clearance | 13.5 in 343.0 mm |
| Maximum Reach | 281.1 in 7140.0 mm |
| Transport Height | 97.9 in 2487.0 mm |
| Cab Height | 99.0 in 2514.0 mm |
| Boom Swing - Left | 24.0 in 604.0 mm |
| O/A Track Width | 97.2 in 2470.0 mm |
| Boom Swing - Right | 37.0 in 935.0 mm |
| Maximum Dig Height | 264.9 in 6729.0 mm |
| Tail Swing without Counterweight | 57.1 in 1450.0 mm |
| Dig Depth | 162.0 in 4115.0 mm |
| Maximum Dump Clearance | 187.1 in 4753.0 mm |
| Track Belt/Shoe Width | 17.7 in 450.0 mm |
| O/A Undercarriage Length | 126.0 in 3200.0 mm |
| Ground Pressure - Minimum Weight | 6.0 psi 38.0 kPa |
| Travel Speed - High | 3.1 mile/h 4.9 km/h |
| Maximum Traction Force - High Speed | 6497.0 lb 28.9 kN |
| Travel Speed - Low | 1.6 mile/h 2.6 km/h |
| Ground Pressure - Maximum Weight | 6.0 psi 40.8 kPa |
| Maximum Traction Force - Low Speed | 19064.0 lb 84.8 kN |
| Gradeability - Maximum | 30 degrees 30 degrees |
| Fuel Tank | 39.0 gal (US) 147.0 l |
| Hydraulic System | 28.0 gal (US) 107.0 l |
| Engine Oil | 3.0 gal (US) 11.2 l |
| Cooling System | 2.6 gal (US) 10.0 l |
| Hydraulic Tank | 14.0 gal (US) 53.0 l |
| Machine Swing Speed | 10.6 r/min 10.6 r/min |
| Steel Tracks with Pads | 728.0 lb 330.0 kg |
| Long Stick | 146.0 lb 66.0 kg |
| Counterweight | 552.0 lb 250.0 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) | 99.0 dB(A) 99.0 dB(A) |
| Operator Sound Pressure (ISO 6396:2008) | 72.0 dB(A) 72.0 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 1.0 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. |
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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.
