New CAT Equipment

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.

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Learn more about the 309 CR Mini Hydraulic Excavator

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Product Specs

Engine

Net Power 70.3 HP
Engine Model Cat C3.3B
Displacement 203 in³
Bore 3.7 in
Rated Net Power - 2,200 rpm - EU Stage V - ISO 9249/EEC 80/1269 71.5 HP
Gross Power - ISO 14396 74.3 HP
Rated Net Power - 2,200 rpm - U.S. EPA Tier 4 Final - ISO 9249/EEC 80/1269 70.3 HP
Stroke 4.7 in

Weights

Operating Weight 20731 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

Dimensions - Long Stick

Dig Depth 181 in
O/A Shipping Length 268 in
Maximum Dump Clearance 202 in
Boom In Reach 127 in
Vertical Wall 132 in
Maximum Blade Depth 26 in
O/A Undercarriage Length 126 in
O/A Track Width 97 in
Transport Height 99 in
Stick Length 93 in
Maximum Blade Height 14 in
Maximum Dig Height 279 in
Tail Swing with Counterweight 65 in
Maximum Reach 301 in
Cab Height 100 in
Ground Clearance 13.5 in
Swing Bearing - Height 31 in
Track Belt/Shoe Width 18 in
Boom Swing - Left 24 in
Boom Swing - Right 37 in
Tail Swing without Counterweight 57 in
Maximum Reach - Ground Level 293 in

Blade

Height 17 in
Width - Wide 104 in
Width - Standard 97 in

Dimensions - Standard Stick

Boom Swing - Right 37 in
Maximum Dump Clearance 189 in
Tail Swing without Counterweight 57 in
Transport Height 98 in
Maximum Reach - Ground Level 273 in
O/A Undercarriage Length 126 in
Cab Height 100 in
Swing Bearing - Height 31 in
Maximum Dig Height 149 in
Track Belt/Shoe Width 18 in
O/A Track Width 97 in
Ground Clearance 14 in
O/A Shipping Length 265 in
Maximum Reach 281 in
Tail Swing with Counterweight 65 in
Boom In Reach 120 in
Vertical Wall 116 in
Dig Depth 160 in
Stick Length 72 in
Boom Swing - Left 24 in
Maximum Blade Height 14 in
Maximum Blade Depth 26 in

Hydraulic System

Type Load Sensing Hydraulics with Variable Displacement Piston Pump
Operating Pressure - Swing 3626 psi
Auxiliary Circuit - Secondary - Flow 9 gal/min
Auxiliary Circuit - Primary (High Flow) - Pressure 4134 psi
Digging Force - Stick - Standard 9500 lb
Digging Force - Stick - Long 8023 lb
Auxiliary Circuit - Secondary - Pressure 4134 psi
Operating Pressure - Travel 4134 psi
Pump Flow at 2,400 rpm 62 gal/min
Digging Force - Bucket 13943 lb
Auxiliary Circuit - Primary (High Flow) - Flow 37 gal/min
Operating Pressure - Equipment 4134 psi

Sound

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)

Travel System

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

Certification - Cab

Roll Over Protective Structure (ROPS) ISO 12117-2:2008
Top Guard ISO 10262:1998 (Level II)
Tip Over Protective Structure (TOPS) ISO 12117:1997

Service Refill Capacities

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)

Weight Increase from Minimum Configuration

Steel Tracks with Pads 728 lb
Long Stick 146 lb
Counterweight 552 lb

Swing System

Machine Swing Speed 10.6 r/min
Boom Swing - Right 50 degrees
Boom Swing - Left 60 degrees

Air Conditioning System

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.

Specifications

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.