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.
Net Power 69.5 HP
Operating Weight 21477 lb
Dig Depth 150.2 in
Height 17 in
Bore 3.7in
Displacement 203in³
Engine Model - U.S. EPA Tier 4 Final/EU Stage V Cat C3.3B
Gross Power - SAE J1995 74.3HP
Net Power 69.5HP
Net Power - 2,200 rpm - ISO 9249:2007, 80/1269/EEC 69.5HP
Note Net power advertised is the power available at the flywheel when the engine is equipped with air cleaner, exhaust system and fan.
Stroke 4.7in
Maximum Operating Weight* 21477lb
Minimum Operating Weight* 20121lb
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.
Operating Weight 21477lb
Boom Swing Left 24in
Boom Swing Right 37in
Boom in Reach 122.8in
Cab Height 100in
Dig Depth 150.2in
Ground Clearance 14in
Maximum Blade Depth 19.1in
Maximum Blade Height 16.1in
Maximum Dig Height 205.5in
Maximum Dump Clearance 135.8in
Maximum Reach 256.5in
Maximum Reach at Ground Level 248in
Overall Shipping Length 255.7in
Overall Track Width 97.2in
Overall Undercarriage Length 126in
Stick Length 71.7in
Swing Bearing Height 29.8in
Tail Swing with Counterweight 62.4in
Tail Swing without Counterweight 57.1in
Track Belt/Shoe Width 17.7in
Transport Height 97.4in
Vertical Wall 99.2in
Height 17in
Width - Standard 97.2in
Width - Wide 103.9in
Boom Swing Left 24in
Boom Swing Right 37in
Boom in Reach 106.7in
Cab Height 100in
Dig Depth 136.2in
Ground Clearance 14in
Maximum Blade Depth 19.1in
Maximum Blade Height 16.1in
Maximum Dig Height 322in
Maximum Dump Clearance 247.4in
Maximum Reach 310.4in
Maximum Reach at Ground Level 303.7in
Overall Shipping Length 255.7in
Overall Track Width 97.2in
Overall Undercarriage Length 126in
Stick Length 71.7in
Swing Bearing Height 29.8in
Tail Swing with Counterweight 62.4in
Tail Swing without Counterweight 57.1in
Track Belt/Shoe Width 17.7in
Transport Height 97.4in
Vertical Wall 146.7in
Recyclability 96%
Cooling System 2.6gal (US)
Engine Oil 3gal (US)
Fuel Tank 39gal (US)
Hydraulic System 29gal (US)
Hydraulic Tank 14gal (US)
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.
Counterweight 552lb
Standard Stick 77lb
Steel Tracks with Pads 728lb
Gradeability - Maximum 30 degrees
Ground Pressure - Maximum Weight 5.5psi
Ground Pressure - Minimum Weight 5.1psi
Maximum Traction Force - High Speed 6497lbf
Maximum Traction Force - Low Speed 19064lbf
Travel Speed - High 3.1mile/h
Travel Speed - Low 1.6mile/h
Digging Force - Bucket 13946lbf
Digging Force - Stick - Standard 9509lbf
Maximum Auxiliary Circuit - Primary (High Flow) - Flow at Pump 37gal/min
Maximum Auxiliary Circuit - Primary (High Flow) - Pressure at Pump 4134psi
Maximum Auxiliary Circuit - Primary - Flow at Pump 35gal/min
Maximum Auxiliary Circuit - Primary - Pressure at Pump 4134psi
Maximum Auxiliary Circuit - Secondary - Flow at Pump 9gal/min
Maximum Auxiliary Circuit - Secondary - Pressure at Pump 4134psi
Note Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Operating Pressure - Equipment 4134psi
Operating Pressure - Swing 3626psi
Operating Pressure - Travel 4134psi
Pump Flow at 2,400 rpm 62gal/min
Type Load Sensing Hydraulics with Variable Displacement Piston Pump
Boom Swing - Left 60 degrees
Boom Swing - Right 50 degrees
Machine Swing Speed 10.6r/min
Roll Over Protective Structure (ROPS) ISO 12117-2:2008
Tip Over Protective Structure (TOPS) ISO 12117:1997
Top Guard ISO 10262:1998 (Level II)
Average Exterior Sound Pressure (ISO 6395:2008) 99dB(A)
Note European Union Directive "2000/14/EC"
Operator Sound Pressure (ISO 6396:2008) 72dB(A)
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.
Cat C3.3 Diesel Engine (U.S. EPA Tier 4 Final/EU Stage V) – Electronic Engine, Turbo, Diesel Particulate Filter (DPF)
Automatic Engine Idle
Automatic Engine Shutdown
Automatic Swing Brake
Automatic Two Speed Travel
Fuel Water Separator with Indicator
Radial Seal – Double Element Air Filter
Extended Life Coolant, –37° C (–35° F)
Ecology Drain
Smart Tech Electronic Pump
Electronic Variable Displacement Piston Pump
Load Sensing/Flow Sharing Hydraulics
Power On Demand
Hydraulic Temperature Monitoring
Certified Accumulator
HYDO Advanced Hydraulic Oil
Dedicated Auxiliary Hydraulic Pump
Top Guard ISO 10262 1998 Level I
ROPS ISO 12117-2:2008
Sealed and Pressurized Cab
Stick Steer Mode
Travel Cruise Control
Control Pattern Changer
Adjustable Wrist Rests
Molded Footrests
Removable, Washable Floor Mat
Travel Pedals and Hand Levers
Cat Key with Passcode Option
HVAC with Automatic Temperature Control
Hydraulic Lockout Controls
Integrated Lower Front Window
Assisted Front Window Overhead Storage
Rear Window Emergency Exit
Fabric, High Back, Suspension Seat
Retractable Seat Belt (75 mm/3 in)
Coat Hook
Cup Holder
LED Interior Light
Literature Holder
Mounting Bosses for Top and Front Guards
12V Power Socket
Radio – Bluetooth, Auxiliary, Microphone, USB (charging only)
Skylight
Signaling/Warning Horn
Cab and (left side) Boom Work Lights
Utility Space for Mobile Phone
Next Generation Color LCD Monitor (IP66)
– Jog Dial Interface
– Fuel Level and Coolant Temperature Gauges
– Maintenance and Machine Monitoring
– Performance and Machine Adjustments
– Numeric Security Code
– Multiple Languages
– Camera Ready (IP68 & IP69K)
– Hour Meter with Wake Up Switch
Greased and Lubricated Track
Hydraulic Track Adjusters
Tie Down Eyes on Track Frame
Dozer Blade
Dozer Float
Bolt-on, Reversible Wear Edge
Variable Angle Boom
Standard Stick (1820 mm/71.7 in)
Front Shovel Capable – Pin-on/Manual Coupler/Hydraulic Coupler (not available in all regions)
Thumb Ready (not available in all regions)
12 Volt Electrical System
90 Ampere Alternator
Circuit Breaker
850 CCA Maintenance Free Battery
Battery Disconnect
Ignition Key Stop Switch
Locks on External Enclosure Doors
Lockable Fuel Cap
Beacon Socket
Rear Reflectors
Push to Start with Bluetooth® Key
Air Suspension Heated Seat
Rain Visor
Next Generation Advanced Monitor (below are all included with Next Generation Advanced Monitor option)
– Touch Screen
– Site Reference System
– High Definition Camera Capable (IP68 & IP69K)
– Numeric Security Code
Wide Dozer Blade
Steel Tracks (450 mm/17.7 in wide)
Wide Steel Tracks (600 mm/23.6 in)
Steel Track with Rubber Pads
Track Guides
Attachments including Buckets, Augers and Hammers
2nd Auxiliary Hydraulic Lines
Boom Lowering Check Valve
Stick Lowering Check Valve
Certified Lifting Eye
Product Link Elite (regulations apply)
Travel Alarm
Rearview Camera
Rotating Beacon
Mesh Front Guard ISO 10262 1998 Level I
Heavy Duty Front Guard ISO 10262 1998 Level II
Overhead Cab Guard ISO 10262 1998 Level II
Polycarbonate Front Window EN356 P5A
Track Guards
Additional Counterweight
Water Jacket Heater
Refueling Pump
