309 CR VAB Mini Hydraulic Excavator
309 CR VAB Mini Hydraulic Excavator
309 CR VAB Mini Hydraulic Excavator

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.

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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.
Net Power 69.5 HP
Displacement 203 in³
Stroke 4.7 in
Bore 3.7 in
Gross Power - SAE J1995 74.3 HP
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 - 2,200 rpm - ISO 9249:2007, 80/1269/EEC 69.5 HP
Engine Model - U.S. EPA Tier 4 Final/EU Stage V Cat C3.3B
Operating Weight 21477 lb
Note (1) *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.
Minimum Operating Weight* 20121 lb
Maximum Operating Weight* 21477 lb
Steel Tracks with Pads 728 lb
Counterweight 552 lb
Standard Stick 77 lb
Ground Pressure - Minimum Weight 5.1 psi
Travel Speed - High 3.1 mile/h
Maximum Traction Force - High Speed 6497 lbf
Travel Speed - Low 1.6 mile/h
Ground Pressure - Maximum Weight 5.5 psi
Maximum Traction Force - Low Speed 19064 lbf
Gradeability - Maximum 30 degrees
Fuel Tank 39 gal (US)
Hydraulic System 29 gal (US)
Engine Oil 3 gal (US)
Cooling System 2.6 gal (US)
Hydraulic Tank 14 gal (US)
Operating Pressure - Travel 4134 psi
Type Load Sensing Hydraulics with Variable Displacement Piston Pump
Digging Force - Stick - Standard 9509 lbf
Digging Force - Bucket 13946 lbf
Pump Flow at 2,400 rpm 62 gal/min
Operating Pressure - Swing 3626 psi
Note Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Operating Pressure - Equipment 4134 psi
Maximum Auxiliary Circuit - Secondary - Flow at Pump 9 gal/min
Maximum Auxiliary Circuit - Secondary - Pressure at Pump 4134 psi
Maximum Auxiliary Circuit - Primary - Flow at Pump 35 gal/min
Maximum Auxiliary Circuit - Primary - Pressure at Pump 4134 psi
Maximum Auxiliary Circuit - Primary (High Flow) - Pressure at Pump 4134 psi
Maximum Auxiliary Circuit - Primary (High Flow) - Flow at Pump 37 gal/min
Digging Force - Stick (Short) 9217 lbf
Machine Swing Speed 10.6 r/min
Boom Swing - Left 60 degrees
Boom Swing - Right 50 degrees
Height 17 in
Width - Wide 103.9 in
Width - Standard 97.2 in
Top Guard ISO 10262:1998 (Level II)
Roll Over Protective Structure (ROPS) ISO 12117-2:2008
Tip Over Protective Structure (TOPS) ISO 12117:1997
Average Exterior Sound Pressure (ISO 6395:2008) 99 dB(A)
Operator Sound Pressure (ISO 6396:2008) 72 dB(A)
Note European Union Directive "2000/14/EC"
Dig Depth 150.2 in
Cab Height 100 in
Maximum Blade Depth 19.1 in
Maximum Blade Height 16.1 in
Stick Length 71.7 in
Maximum Reach 256.5 in
Tail Swing without Counterweight 57.1 in
Vertical Wall 99.2 in
Swing Bearing Height 29.8 in
Track Belt/Shoe Width 17.7 in
Boom Swing Right 37 in
Overall Track Width 97.2 in
Overall Shipping Length 255.7 in
Maximum Dump Clearance 135.8 in
Boom in Reach 122.8 in
Maximum Reach at Ground Level 248 in
Transport Height 97.4 in
Overall Undercarriage Length 126 in
Ground Clearance 14 in
Tail Swing with Counterweight 62.4 in
Maximum Dig Height 205.5 in
Boom Swing Left 24 in
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.
Ground Clearance 14 in
Cab Height 100 in
Boom in Reach 106.7 in
Vertical Wall 146.7 in
Swing Bearing Height 29.8 in
Maximum Dump Clearance 247.4 in
Overall Undercarriage Length 126 in
Maximum Reach at Ground Level 303.7 in
Tail Swing without Counterweight 57.1 in
Maximum Reach 310.4 in
Track Belt/Shoe Width 17.7 in
Overall Shipping Length 255.7 in
Maximum Blade Depth 19.1 in
Maximum Dig Height 322 in
Overall Track Width 97.2 in
Tail Swing with Counterweight 62.4 in
Stick Length 71.7 in
Maximum Blade Height 16.1 in
Boom Swing Right 37 in
Boom Swing Left 24 in
Transport Height 97.4 in
Dig Depth 136.2 in
Ground Clearance 14 in
Maximum Reach 253.1 in
Transport Height 91.7 in
Tail Swing without Counterweight 57.1 in
Track Belt/Shoe Width 17.7 in
Boom Swing Left 24 in
Maximum Reach at Ground Level 244.5 in
Maximum Dump Clearance 138.2 in
Overall Track Width 97.2 in
Overall Shipping Length 255.3 in
Tail Swing with Counterweight 62.4 in
Cab Height 100 in
Dig Depth 145.7 in
Maximum Blade Height 16.1 in
Swing Bearing Height 29.8 in
Maximum Dig Height 208.7 in
Vertical Wall 95.9 in
Maximum Blade Depth 19.1 in
Boom Swing Right 37 in
Overall Undercarriage Length 126 in
Stick Length 65.6 in
Boom in Reach 122.4 in
Cab Height 100 in
Overall Track Width 97.2 in
Tail Swing with Counterweight 62.4 in
Maximum Reach at Ground Level 298.2 in
Overall Undercarriage Length 126 in
Boom Swing Left 24 in
Vertical Wall 138.2 in
Swing Bearing Height 29.8 in
Transport Height 91.7 in
Overall Shipping Length 255.3 in
Ground Clearance 14 in
Maximum Reach 305.1 in
Boom Swing Right 37 in
Boom in Reach 96.9 in
Tail Swing without Counterweight 57.1 in
Maximum Blade Height 16.1 in
Dig Depth 130.1 in
Stick Length 65.6 in
Track Belt/Shoe Width 17.7 in
Maximum Dig Height 316.7 in
Maximum Blade Depth 19.1 in
Maximum Dump Clearance 242.5 in

  • A sealed and pressurized cab is equipped with an improved air conditioning system, adjustable wrist rests and a suspension seat to help keep you working comfortably all day long.

  • Controls are easy to use and the intuitive Next Generation Monitor provides customizable machine operator preferences and easy to read machine information.

  • Moving around the job site is even easier with the Cat Stick Steer option. Easily switch from traditional travel controls with levers and pedals to joystick controls with a push of a button. The benefit of less effort and improved control is in your hands!

  • Increased lifting, swinging, travel and multi-functioning performance helps you get the job done more efficiently, and dig-to-blade allows for easy clean up.

  • Your safety is our top priority. The Cat Mini Excavator is designed to help keep you safe on the job. A back-up camera, courtesy work lights and a fluorescent retractable seat belt are just a few of the safety features we’ve built into the machine.

  • Maintenance is quick and easy on the Cat Mini Excavator. Routine check points are easy to access at ground level with grouped service points and robust service panels.

  • Equipped with features such as auto idle, auto engine shutdown, and efficient hydraulics with a variable displacement pump, the Cat Mini Excavator was designed with reducing your operating costs in mind.

  • Your Cat dealer is here to help you reach your business goals. From providing equipment solutions to operator training to service needs and beyond, your Cat dealer is ready to help.