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.

Get a Quote

    Learn more about the 309 CR Mini Hydraulic Excavator

    Watch

    Product Specs

    Specifications

    Note The 309 CR specifications are based on a machine configured with a Long (L) Undercarriage.

    Engine

    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

    Weights

    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

    Weight Increase from Minimum Configuration

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

    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

    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)

    Hydraulic System

    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

    Swing System

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

    Blade

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

    Certification - Cab

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

    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)

    Dimensions - Standard Stick

    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

    Dimensions - Long Stick

    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 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.