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Key Specs
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
| Note | The 309 CR VAB specifications are based on a machine configured with a Long (L) Undercarriage. For specifications representing a 309 CR VAB with a Standard Undercarriage, please refer to the 308 CR information. The 309 CR VAB specifications are based on a machine configured with a Long (L) Undercarriage. For specifications representing a 309 CR VAB with a Standard Undercarriage, please refer to the 308 CR information. |
| Net Power | 69.5 HP 51.8 kW |
| Displacement | 203 in³ 3.33 l |
| Stroke | 4.7 in 120 mm |
| Bore | 3.7 in 94 mm |
| Gross Power - SAE J1995 | 74.3 HP 55.4 kW |
| Note | Net power advertised is the power available at the flywheel when the engine is equipped with air cleaner, exhaust system and fan. Net power advertised is the power available at the flywheel when the engine is equipped with air cleaner, exhaust system and fan. |
| Net Power - 2,200 rpm - ISO 9249:2007, 80/1269/EEC | 69.5 HP 51.8 kW |
| Engine Model - U.S. EPA Tier 4 Final/EU Stage V | Cat C3.3B Cat C3.3B |
| Operating Weight | 21477 lb 9740 kg |
| Note (1) | *Minimum Weight is based on rubber tracks, no counterweight, operator, full fuel tank, standard stick, blade and no bucket. *Minimum Weight is based on rubber 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, 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. |
| Minimum Operating Weight* | 20121 lb 9125 kg |
| Maximum Operating Weight* | 21477 lb 9740 kg |
| Steel Tracks with Pads | 728 lb 330 kg |
| Counterweight | 552 lb 250 kg |
| Standard Stick | 77 lb 35 kg |
| Ground Pressure - Minimum Weight | 5.1 psi 35.4 kPa |
| Travel Speed - High | 3.1 mile/h 4.9 km/h |
| Maximum Traction Force - High Speed | 6497 lbf 28.9 kN |
| Travel Speed - Low | 1.6 mile/h 2.6 km/h |
| Ground Pressure - Maximum Weight | 5.5 psi 37.8 kPa |
| Maximum Traction Force - Low Speed | 19064 lbf 84.8 kN |
| Gradeability - Maximum | 30 degrees 30 degrees |
| Fuel Tank | 39 gal (US) 147 l |
| Hydraulic System | 29 gal (US) 110 l |
| Engine Oil | 3 gal (US) 11.2 l |
| Cooling System | 2.6 gal (US) 10 l |
| Hydraulic Tank | 14 gal (US) 53 l |
| Operating Pressure - Travel | 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 | 9509 lbf 42.3 kN |
| Digging Force - Bucket | 13946 lbf 62 kN |
| Pump Flow at 2,400 rpm | 62 gal/min 233 l/min |
| Operating Pressure - Swing | 3626 psi 250 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. |
| Operating Pressure - Equipment | 4134 psi 285 bar |
| Maximum Auxiliary Circuit - Secondary - Flow at Pump | 9 gal/min 33 l/min |
| Maximum Auxiliary Circuit - Secondary - Pressure at Pump | 4134 psi 285 bar |
| Maximum Auxiliary Circuit - Primary - Flow at Pump | 35 gal/min 131 l/min |
| Maximum Auxiliary Circuit - Primary - Pressure at Pump | 4134 psi 285 bar |
| Maximum Auxiliary Circuit - Primary (High Flow) - Pressure at Pump | 4134 psi 285 bar |
| Maximum Auxiliary Circuit - Primary (High Flow) - Flow at Pump | 37 gal/min 140 l/min |
| Machine Swing Speed | 10.6 r/min 10.6 r/min |
| Boom Swing - Left | 60 degrees 60 degrees |
| Boom Swing - Right | 50 degrees 50 degrees |
| Height | 17 in 431 mm |
| Width - Wide | 103.9 in 2640 mm |
| Width - Standard | 97.2 in 2470 mm |
| 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" |
| Dig Depth | 150.2 in 3815 mm |
| Cab Height | 100 in 2541 mm |
| Maximum Blade Depth | 19.1 in 484 mm |
| Maximum Blade Height | 16.1 in 408 mm |
| Stick Length | 71.7 in 1820 mm |
| Maximum Reach | 256.5 in 6515 mm |
| Tail Swing without Counterweight | 57.1 in 1450 mm |
| Vertical Wall | 99.2 in 2520 mm |
| Swing Bearing Height | 29.8 in 756 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 | 255.7 in 6495 mm |
| Maximum Dump Clearance | 135.8 in 3450 mm |
| Boom in Reach | 122.8 in 3120 mm |
| Maximum Reach at Ground Level | 248 in 6300 mm |
| Transport Height | 97.4 in 2475 mm |
| Overall Undercarriage Length | 126 in 3200 mm |
| Ground Clearance | 14 in 356 mm |
| Tail Swing with Counterweight | 62.4 in 1585 mm |
| Maximum Dig Height | 205.5 in 5220 mm |
| Boom Swing Left | 24 in 605 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. |
| Ground Clearance | 14 in 356 mm |
| Cab Height | 100 in 2541 mm |
| Boom in Reach | 106.7 in 2710 mm |
| Vertical Wall | 146.7 in 3725 mm |
| Swing Bearing Height | 29.8 in 756 mm |
| Maximum Dump Clearance | 247.4 in 6285 mm |
| Overall Undercarriage Length | 126 in 3200 mm |
| Maximum Reach at Ground Level | 303.7 in 7715 mm |
| Tail Swing without Counterweight | 57.1 in 1450 mm |
| Maximum Reach | 310.4 in 7885 mm |
| Track Belt/Shoe Width | 17.7 in 450 mm |
| Overall Shipping Length | 255.7 in 6495 mm |
| Maximum Blade Depth | 19.1 in 484 mm |
| Maximum Dig Height | 322 in 8180 mm |
| Overall Track Width | 97.2 in 2470 mm |
| Tail Swing with Counterweight | 62.4 in 1585 mm |
| Stick Length | 71.7 in 1820 mm |
| Maximum Blade Height | 16.1 in 408 mm |
| Boom Swing Right | 37 in 935 mm |
| Boom Swing Left | 24 in 605 mm |
| Transport Height | 97.4 in 2475 mm |
| Dig Depth | 136.2 in 3460 mm |
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