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

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.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 specifications are based on a machine configured with a Long (L) Undercarriage.
Net Power 69.5 HP
Engine Model Cat C3.3B
Displacement 203 in³
Bore 3.7 in
Stroke 4.7 in
Gross Power - SAE J1995 74.3 HP
Rated Net Power - 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269 69.5 HP
Operating Weight 21091 lb
Maximum Operating Weight with Cab** 21091 lb
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.
Minimum Operating Weight with Cab* 19735 lb
Steel Tracks with Pads 728 lb
Long Stick 146 lb
Counterweight 552 lb
Gradeability - Maximum 30 degrees
Ground Pressure - Minimum Weight 5 psi
Ground Pressure - Maximum Weight 5.4 psi
Travel Speed - High 3.1 mile/h
Travel Speed - Low 1.6 mile/h
Maximum Traction Force - High Speed 6497 lb
Maximum Traction Force - Low Speed 19064 lb
Engine Oil 3 gal (US)
Fuel Tank 39 gal (US)
Hydraulic System 29 gal (US)
Cooling System 2.6 gal (US)
Hydraulic Tank 14 gal (US)
Type Load Sensing Hydraulics with Variable Displacement Piston Pump
Operating Pressure - Swing 3626 psi
Digging Force - Stick - Standard 9500 lb
Digging Force - Stick - Long 8023 lb
Operating Pressure - Travel 4134 psi
Pump Flow at 2,400 rpm 62 gal/min
Digging Force - Bucket 13943 lb
Operating Pressure - Equipment 4134 psi
Note Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Maximum Auxiliary Circuit - Secondary - Flow at Pump 9 gal/min
Maximum Auxiliary Circuit - Secondary - Pressure at Pump 4134 psi
Maximum Auxiliary Circuit - Primary (High Flow) - Flow at Pump 37 gal/min
Maximum Auxiliary Circuit - Primary (High Flow) - Pressure at Pump 4134 psi
Machine Swing Speed 10.6 r/min
Boom Swing - Right 50 degrees
Boom Swing - Left 60 degrees
Height 17 in
Width - Wide 104 in
Width - Standard 97 in
Roll Over Protective Structure (ROPS) ISO 12117-2:2008
Top Guard ISO 10262:1998 (Level I)
Tip Over Protective Structure (TOPS) ISO 12117:1997
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)
Boom Swing - Right 36.8 in
Maximum Dump Clearance 187.4 in
Tail Swing without Counterweight 57.1 in
Maximum Reach - Ground Level 273.6 in
O/A Undercarriage Length 126 in
Cab Height 100 in
Swing Bearing - Height 29.7 in
Maximum Dig Height 265.2 in
Track Belt/Shoe Width 17.7 in
O/A Track Width 97.2 in
Ground Clearance 14 in
Maximum Reach 281.1 in
Tail Swing with Counterweight 62.4 in
Boom In Reach 120.4 in
Vertical Wall 117.8 in
Dig Depth 161.7 in
Stick Length 71.8 in
Boom Swing - Left 23.8 in
Maximum Blade Height 16.1 in
Maximum Blade Depth 26 in
Note *Boom Height when stick is pinned in transport position with no attachments.
Overall Shipping Length - without Counterweight 266.7 in
Overall Shipping Length - with Counterweight 266.7 in
Note (2) ***With blade positioned at the rear of the machine.
Note (1) **Boom Height when stick is pinned in working position with attachments Standard Stick offers only one pin position.
Height - Boom Transport - No Tools* 95.7 in
Height - Boom Working - With Tools** 104.7 in
Dig Depth 182.8 in
Maximum Dump Clearance 199.7 in
Boom In Reach 126.6 in
Vertical Wall 134 in
Maximum Blade Depth 26 in
O/A Undercarriage Length 126 in
O/A Track Width 97.2 in
Stick Length 92.8 in
Maximum Blade Height 16.1 in
Maximum Dig Height 277.1 in
Tail Swing with Counterweight 62.4 in
Maximum Reach 300.7 in
Cab Height 100 in
Ground Clearance 14 in
Swing Bearing - Height 29.7 in
Track Belt/Shoe Width 17.7 in
Boom Swing - Left 23.8 in
Boom Swing - Right 36.8 in
Tail Swing without Counterweight 57.1 in
Maximum Reach - Ground Level 293.7 in
Note *Boom Height when stick is pinned in transport position with no attachments.
Note (2) ***With blade positioned at the rear of the machine.
Note (1) **Boom Height when stick is pinned in working position with attachments Standard Stick offers only one pin position.
Height - Boom Transport - No Tools* 89 in
Overall Shipping Length - with Counterweight 7052 mm (277.6 in)***
Height - Boom Working - With Tools** 120.1 in
Overall Shipping Length - without Counterweight 7052 mm (277.6 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.

  • 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 blade float 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.