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 | |
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Engine Model | Cat C3.3B |
Net Power | 70.3 HP / 52.4 kW |
Bore | 3.7 in / 94 mm |
Displacement | 203 in³ / 3.33 l |
Gross Power - ISO 14396 | 74.3 HP / 55.4 kW |
Rated Net Power - 2,200 rpm - EU Stage V - ISO 9249/EEC 80/1269 | 71.5 HP / 53.3 kW |
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 |
Weights | |
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Operating Weight | 20731 lb / 9403 kg |
Maximum Operating Weight with Cab** | 20731 lb / 9403 kg |
Minimum Operating Weight with Cab* | 19304 lb / 8756 kg |
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. |
Blade | |
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Height | 17 in / 431 mm |
Width - Standard | 97.2 in / 2470 mm |
Width - Wide | 103.9 in / 2640 mm |
Air Conditioning System | |
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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. |
Certification - Cab | |
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Roll Over Protective Structure (ROPS) | ISO 12117-2:2008 |
Tip Over Protective Structure (TOPS) | ISO 12117:1997 |
Top Guard | ISO 10262:1998 (Level II) |
Dimensions - Long Stick | |
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Boom In Reach | 126.6 in / 3215 mm |
Boom Swing - Left | 24 in / 604 mm |
Boom Swing - Right | 37 in / 935 mm |
Cab Height | 99 in / 2514 mm |
Dig Depth | 183.1 in / 4650 mm |
Ground Clearance | 13.5 in / 343 mm |
Maximum Blade Depth | 26.9 in / 684 mm |
Maximum Blade Height | 13.5 in / 342 mm |
Maximum Dig Height | 276.8 in / 7032 mm |
Maximum Dump Clearance | 199.4 in / 5065 mm |
Maximum Reach | 300.7 in / 7637 mm |
Maximum Reach - Ground Level | 293.8 in / 7462 mm |
O/A Shipping Length | 262.3 in / 6662 mm |
O/A Track Width | 97.2 in / 2470 mm |
O/A Undercarriage Length | 126 in / 3200 mm |
Stick Length | 92.8 in / 2358 mm |
Swing Bearing - Height | 28.7 in / 729 mm |
Tail Swing with Counterweight | 64.8 in / 1645 mm |
Tail Swing without Counterweight | 57.1 in / 1450 mm |
Track Belt/Shoe Width | 17.7 in / 450 mm |
Transport Height | 99 in / 2514 mm |
Vertical Wall | 134.3 in / 3411 mm |
Dimensions - Standard Stick | |
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Boom In Reach | 120.4 in / 3058 mm |
Boom Swing - Left | 24 in / 604 mm |
Boom Swing - Right | 37 in / 935 mm |
Cab Height | 99 in / 2514 mm |
Dig Depth | 162 in / 4115 mm |
Ground Clearance | 13.5 in / 343 mm |
Maximum Blade Depth | 26.9 in / 684 mm |
Maximum Blade Height | 13.5 in / 342 mm |
Maximum Dig Height | 264.9 in / 6729 mm |
Maximum Dump Clearance | 187.1 in / 4753 mm |
Maximum Reach | 281.1 in / 7140 mm |
Maximum Reach - Ground Level | 273.6 in / 6951 mm |
O/A Shipping Length | 259 in / 6578 mm |
O/A Track Width | 97.2 in / 2470 mm |
O/A Undercarriage Length | 126 in / 3200 mm |
Stick Length | 71.8 in / 1823 mm |
Swing Bearing - Height | 28.7 in / 729 mm |
Tail Swing with Counterweight | 64.8 in / 1645 mm |
Tail Swing without Counterweight | 57.1 in / 1450 mm |
Track Belt/Shoe Width | 17.7 in / 450 mm |
Transport Height | 97.9 in / 2487 mm |
Vertical Wall | 118 in / 2998 mm |
Hydraulic System | |
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Auxiliary Circuit - Primary (High Flow) - Flow | 37 gal/min / 140 l/min |
Auxiliary Circuit - Primary (High Flow) - Pressure | 4134 psi / 285 bar |
Auxiliary Circuit - Secondary - Flow | 9 gal/min / 33 l/min |
Auxiliary Circuit - Secondary - Pressure | 4134 psi / 285 bar |
Digging Force - Bucket | 13943 lb / 62 kN |
Digging Force - Stick - Long | 8023 lb / 35.7 kN |
Digging Force - Stick - Standard | 9500 lb / 42.3 kN |
Operating Pressure - Equipment | 4134 psi / 285 bar |
Operating Pressure - Swing | 3626 psi / 250 bar |
Operating Pressure - Travel | 4134 psi / 285 bar |
Pump Flow at 2,400 rpm | 62 gal/min / 233 l/min |
Type | Load Sensing Hydraulics with Variable Displacement Piston Pump |
Service Refill Capacities | |
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Cooling System | 2.6 gal (US) / 10 l |
Engine Oil | 3 gal (US) / 11.2 l |
Fuel Tank | 39 gal (US) / 147 l |
Hydraulic System | 28 gal (US) / 107 l |
Hydraulic Tank | 14 gal (US) / 53 l |
Sound | |
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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) |
Specifications | |
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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. |
Swing System | |
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Machine Swing Speed | 10.6 r/min |
Travel System | |
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Gradeability - Maximum | 30 degrees |
Ground Pressure - Maximum Weight | 6 psi / 40.8 kPa |
Ground Pressure - Minimum Weight | 6 psi / 38 kPa |
Maximum Traction Force - High Speed | 6497 lb / 28.9 kN |
Maximum Traction Force - Low Speed | 19064 lb / 84.8 kN |
Travel Speed - High | 3.1 mile/h / 4.9 km/h |
Travel Speed - Low | 1.6 mile/h / 2.6 km/h |
Weight Increase from Minimum Configuration | |
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Counterweight | 552 lb / 250 kg |
Long Stick | 146 lb / 66 kg |
Steel Tracks with Pads | 728 lb / 330 kg |
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