With our huge inventory of new, used and rental equipment, WesTrac has the right machine for the job.
With our huge inventory of new, used and rental equipment, WesTrac has the right machine for the job.
Keep your operation working around the clock by making WesTrac your partner in parts. With over 75,000 product lines stocked in our warehouses, ready-to-go, we won't let you down.
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.
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.
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. | 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. |
Engine
Net Power | 51.8 kW | 69.5 hp |
Displacement | 3.33 l | 203 in³ |
Stroke | 120 mm | 4.7 in |
Bore | 94 mm | 3.7 in |
Gross Power - SAE J1995 | 55.4 kW | 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 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 | 51.8 kW | 69.5 hp |
Engine Model - U.S. EPA Tier 4 Final/EU Stage V | Cat C3.3B | Cat C3.3B |
Weights
Operating Weight | 9740 kg | 21477 lb |
Note (1) | *Minimum Weight is based on rubber tracks, no counterweight, operator, full fuel tank, standard stick, blade and no bucket. | *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. | **Maximum Weight is based on steel tracks with rubber pads, counterweight, operator, full fuel tank, standard stick, blade and no bucket. |
Minimum Operating Weight* | 9125 kg | 20121 lb |
Maximum Operating Weight* | 9740 kg | 21477 lb |
Weight Increase from Minimum Configuration
Steel Tracks with Pads | 330 kg | 728 lb |
Counterweight | 250 kg | 552 lb |
Standard Stick | 35 kg | 77 lb |
Travel System
Ground Pressure - Minimum Weight | 35.4 kPa | 5.1 psi |
Travel Speed - High | 4.9 km/h | 3.1 mile/h |
Maximum Traction Force - High Speed | 28.9 kN | 6497 lbf |
Travel Speed - Low | 2.6 km/h | 1.6 mile/h |
Ground Pressure - Maximum Weight | 37.8 kPa | 5.5 psi |
Maximum Traction Force - Low Speed | 84.8 kN | 19064 lbf |
Gradeability - Maximum | 30 degrees | 30 degrees |
Service Refill Capacities
Fuel Tank | 147 l | 39 gal (US) |
Hydraulic System | 110 l | 29 gal (US) |
Engine Oil | 11.2 l | 3 gal (US) |
Cooling System | 10 l | 2.6 gal (US) |
Hydraulic Tank | 53 l | 14 gal (US) |
Hydraulic System
Operating Pressure - Travel | 285 bar | 4134 psi |
Type | Load Sensing Hydraulics with Variable Displacement Piston Pump | Load Sensing Hydraulics with Variable Displacement Piston Pump |
Digging Force - Stick - Standard | 42.3 kN | 9509 lbf |
Digging Force - Bucket | 62 kN | 13946 lbf |
Pump Flow at 2,400 rpm | 233 l/min | 62 gal/min |
Operating Pressure - Swing | 250 bar | 3626 psi |
Note | Flow and pressure are not combinable. Under load, as flow rises pressure goes down. | Flow and pressure are not combinable. Under load, as flow rises pressure goes down. |
Operating Pressure - Equipment | 285 bar | 4134 psi |
Maximum Auxiliary Circuit - Secondary - Flow at Pump | 33 l/min | 9 gal/min |
Maximum Auxiliary Circuit - Secondary - Pressure at Pump | 285 bar | 4134 psi |
Maximum Auxiliary Circuit - Primary - Flow at Pump | 131 l/min | 35 gal/min |
Maximum Auxiliary Circuit - Primary - Pressure at Pump | 285 bar | 4134 psi |
Maximum Auxiliary Circuit - Primary (High Flow) - Pressure at Pump | 285 bar | 4134 psi |
Maximum Auxiliary Circuit - Primary (High Flow) - Flow at Pump | 140 l/min | 37 gal/min |
Swing System
Machine Swing Speed | 10.6 r/min | 10.6 r/min |
Boom Swing - Left | 60 degrees | 60 degrees |
Boom Swing - Right | 50 degrees | 50 degrees |
Blade
Height | 431 mm | 17 in |
Width - Wide | 2640 mm | 103.9 in |
Width - Standard | 2470 mm | 97.2 in |
Certification - Cab
Top Guard | ISO 10262:1998 (Level II) | ISO 10262:1998 (Level II) |
Roll Over Protective Structure (ROPS) | ISO 12117-2:2008 | ISO 12117-2:2008 |
Tip Over Protective Structure (TOPS) | ISO 12117:1997 | ISO 12117:1997 |
Sound
Average Exterior Sound Pressure (ISO 6395:2008) | 99 dB(A) | 99 dB(A) |
Operator Sound Pressure (ISO 6396:2008) | 72 dB(A) | 72 dB(A) |
Note | European Union Directive "2000/14/EC" | European Union Directive "2000/14/EC" |
Dimensions - VAB In
Dig Depth | 3815 mm | 150.2 in |
Cab Height | 2541 mm | 100 in |
Maximum Blade Depth | 484 mm | 19.1 in |
Maximum Blade Height | 408 mm | 16.1 in |
Stick Length | 1820 mm | 71.7 in |
Maximum Reach | 6515 mm | 256.5 in |
Tail Swing without Counterweight | 1450 mm | 57.1 in |
Vertical Wall | 2520 mm | 99.2 in |
Swing Bearing Height | 756 mm | 29.8 in |
Track Belt/Shoe Width | 450 mm | 17.7 in |
Boom Swing Right | 935 mm | 37 in |
Overall Track Width | 2470 mm | 97.2 in |
Overall Shipping Length | 6495 mm | 255.7 in |
Maximum Dump Clearance | 3450 mm | 135.8 in |
Boom in Reach | 3120 mm | 122.8 in |
Maximum Reach at Ground Level | 6300 mm | 248 in |
Transport Height | 2475 mm | 97.4 in |
Overall Undercarriage Length | 3200 mm | 126 in |
Ground Clearance | 356 mm | 14 in |
Tail Swing with Counterweight | 1585 mm | 62.4 in |
Maximum Dig Height | 5220 mm | 205.5 in |
Boom Swing Left | 605 mm | 24 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. | 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. |
Dimensions - VAB Out
Ground Clearance | 356 mm | 14 in |
Cab Height | 2541 mm | 100 in |
Boom in Reach | 2710 mm | 106.7 in |
Vertical Wall | 3725 mm | 146.7 in |
Swing Bearing Height | 756 mm | 29.8 in |
Maximum Dump Clearance | 6285 mm | 247.4 in |
Overall Undercarriage Length | 3200 mm | 126 in |
Maximum Reach at Ground Level | 7715 mm | 303.7 in |
Tail Swing without Counterweight | 1450 mm | 57.1 in |
Maximum Reach | 7885 mm | 310.4 in |
Track Belt/Shoe Width | 450 mm | 17.7 in |
Overall Shipping Length | 6495 mm | 255.7 in |
Maximum Blade Depth | 484 mm | 19.1 in |
Maximum Dig Height | 8180 mm | 322 in |
Overall Track Width | 2470 mm | 97.2 in |
Tail Swing with Counterweight | 1585 mm | 62.4 in |
Stick Length | 1820 mm | 71.7 in |
Maximum Blade Height | 408 mm | 16.1 in |
Boom Swing Right | 935 mm | 37 in |
Boom Swing Left | 605 mm | 24 in |
Transport Height | 2475 mm | 97.4 in |
Dig Depth | 3460 mm | 136.2 in |
Sustainability
Recyclability | 96% | 96% |
ENGINE
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 |
HYDRAULICS
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 |
OPERATOR ENVIRONMENT
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 |
UNDERCARRIAGE
Greased and Lubricated Track |
Hydraulic Track Adjusters |
Tie Down Eyes on Track Frame |
Dozer Blade |
Dozer Float |
Bolt-on, Reversible Wear Edge |
BOOM, STICK AND LINKAGES
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) |
ELECTRICAL
12 Volt Electrical System |
90 Ampere Alternator |
Circuit Breaker |
850 CCA Maintenance Free Battery |
Battery Disconnect |
Ignition Key Stop Switch |
OTHER
Locks on External Enclosure Doors |
Lockable Fuel Cap |
Beacon Socket |
Rear Reflectors |
OPERATOR ENVIRONMENT
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 |
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.
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. | 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. |
Engine
Net Power | 51.8 kW | 69.5 hp |
Displacement | 3.33 l | 203 in³ |
Stroke | 120 mm | 4.7 in |
Bore | 94 mm | 3.7 in |
Gross Power - SAE J1995 | 55.4 kW | 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 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 | 51.8 kW | 69.5 hp |
Engine Model - U.S. EPA Tier 4 Final/EU Stage V | Cat C3.3B | Cat C3.3B |
Weights
Operating Weight | 9740 kg | 21477 lb |
Note (1) | *Minimum Weight is based on rubber tracks, no counterweight, operator, full fuel tank, standard stick, blade and no bucket. | *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. | **Maximum Weight is based on steel tracks with rubber pads, counterweight, operator, full fuel tank, standard stick, blade and no bucket. |
Minimum Operating Weight* | 9125 kg | 20121 lb |
Maximum Operating Weight* | 9740 kg | 21477 lb |
Weight Increase from Minimum Configuration
Steel Tracks with Pads | 330 kg | 728 lb |
Counterweight | 250 kg | 552 lb |
Standard Stick | 35 kg | 77 lb |
Travel System
Ground Pressure - Minimum Weight | 35.4 kPa | 5.1 psi |
Travel Speed - High | 4.9 km/h | 3.1 mile/h |
Maximum Traction Force - High Speed | 28.9 kN | 6497 lbf |
Travel Speed - Low | 2.6 km/h | 1.6 mile/h |
Ground Pressure - Maximum Weight | 37.8 kPa | 5.5 psi |
Maximum Traction Force - Low Speed | 84.8 kN | 19064 lbf |
Gradeability - Maximum | 30 degrees | 30 degrees |
Service Refill Capacities
Fuel Tank | 147 l | 39 gal (US) |
Hydraulic System | 110 l | 29 gal (US) |
Engine Oil | 11.2 l | 3 gal (US) |
Cooling System | 10 l | 2.6 gal (US) |
Hydraulic Tank | 53 l | 14 gal (US) |
Hydraulic System
Operating Pressure - Travel | 285 bar | 4134 psi |
Type | Load Sensing Hydraulics with Variable Displacement Piston Pump | Load Sensing Hydraulics with Variable Displacement Piston Pump |
Digging Force - Stick - Standard | 42.3 kN | 9509 lbf |
Digging Force - Bucket | 62 kN | 13946 lbf |
Pump Flow at 2,400 rpm | 233 l/min | 62 gal/min |
Operating Pressure - Swing | 250 bar | 3626 psi |
Note | Flow and pressure are not combinable. Under load, as flow rises pressure goes down. | Flow and pressure are not combinable. Under load, as flow rises pressure goes down. |
Operating Pressure - Equipment | 285 bar | 4134 psi |
Maximum Auxiliary Circuit - Secondary - Flow at Pump | 33 l/min | 9 gal/min |
Maximum Auxiliary Circuit - Secondary - Pressure at Pump | 285 bar | 4134 psi |
Maximum Auxiliary Circuit - Primary - Flow at Pump | 131 l/min | 35 gal/min |
Maximum Auxiliary Circuit - Primary - Pressure at Pump | 285 bar | 4134 psi |
Maximum Auxiliary Circuit - Primary (High Flow) - Pressure at Pump | 285 bar | 4134 psi |
Maximum Auxiliary Circuit - Primary (High Flow) - Flow at Pump | 140 l/min | 37 gal/min |
Swing System
Machine Swing Speed | 10.6 r/min | 10.6 r/min |
Boom Swing - Left | 60 degrees | 60 degrees |
Boom Swing - Right | 50 degrees | 50 degrees |
Blade
Height | 431 mm | 17 in |
Width - Wide | 2640 mm | 103.9 in |
Width - Standard | 2470 mm | 97.2 in |
Certification - Cab
Top Guard | ISO 10262:1998 (Level II) | ISO 10262:1998 (Level II) |
Roll Over Protective Structure (ROPS) | ISO 12117-2:2008 | ISO 12117-2:2008 |
Tip Over Protective Structure (TOPS) | ISO 12117:1997 | ISO 12117:1997 |
Sound
Average Exterior Sound Pressure (ISO 6395:2008) | 99 dB(A) | 99 dB(A) |
Operator Sound Pressure (ISO 6396:2008) | 72 dB(A) | 72 dB(A) |
Note | European Union Directive "2000/14/EC" | European Union Directive "2000/14/EC" |
Dimensions - VAB In
Dig Depth | 3815 mm | 150.2 in |
Cab Height | 2541 mm | 100 in |
Maximum Blade Depth | 484 mm | 19.1 in |
Maximum Blade Height | 408 mm | 16.1 in |
Stick Length | 1820 mm | 71.7 in |
Maximum Reach | 6515 mm | 256.5 in |
Tail Swing without Counterweight | 1450 mm | 57.1 in |
Vertical Wall | 2520 mm | 99.2 in |
Swing Bearing Height | 756 mm | 29.8 in |
Track Belt/Shoe Width | 450 mm | 17.7 in |
Boom Swing Right | 935 mm | 37 in |
Overall Track Width | 2470 mm | 97.2 in |
Overall Shipping Length | 6495 mm | 255.7 in |
Maximum Dump Clearance | 3450 mm | 135.8 in |
Boom in Reach | 3120 mm | 122.8 in |
Maximum Reach at Ground Level | 6300 mm | 248 in |
Transport Height | 2475 mm | 97.4 in |
Overall Undercarriage Length | 3200 mm | 126 in |
Ground Clearance | 356 mm | 14 in |
Tail Swing with Counterweight | 1585 mm | 62.4 in |
Maximum Dig Height | 5220 mm | 205.5 in |
Boom Swing Left | 605 mm | 24 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. | 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. |
Dimensions - VAB Out
Ground Clearance | 356 mm | 14 in |
Cab Height | 2541 mm | 100 in |
Boom in Reach | 2710 mm | 106.7 in |
Vertical Wall | 3725 mm | 146.7 in |
Swing Bearing Height | 756 mm | 29.8 in |
Maximum Dump Clearance | 6285 mm | 247.4 in |
Overall Undercarriage Length | 3200 mm | 126 in |
Maximum Reach at Ground Level | 7715 mm | 303.7 in |
Tail Swing without Counterweight | 1450 mm | 57.1 in |
Maximum Reach | 7885 mm | 310.4 in |
Track Belt/Shoe Width | 450 mm | 17.7 in |
Overall Shipping Length | 6495 mm | 255.7 in |
Maximum Blade Depth | 484 mm | 19.1 in |
Maximum Dig Height | 8180 mm | 322 in |
Overall Track Width | 2470 mm | 97.2 in |
Tail Swing with Counterweight | 1585 mm | 62.4 in |
Stick Length | 1820 mm | 71.7 in |
Maximum Blade Height | 408 mm | 16.1 in |
Boom Swing Right | 935 mm | 37 in |
Boom Swing Left | 605 mm | 24 in |
Transport Height | 2475 mm | 97.4 in |
Dig Depth | 3460 mm | 136.2 in |
Sustainability
Recyclability | 96% | 96% |
ENGINE
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 |
HYDRAULICS
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 |
OPERATOR ENVIRONMENT
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 |
UNDERCARRIAGE
Greased and Lubricated Track |
Hydraulic Track Adjusters |
Tie Down Eyes on Track Frame |
Dozer Blade |
Dozer Float |
Bolt-on, Reversible Wear Edge |
BOOM, STICK AND LINKAGES
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) |
ELECTRICAL
12 Volt Electrical System |
90 Ampere Alternator |
Circuit Breaker |
850 CCA Maintenance Free Battery |
Battery Disconnect |
Ignition Key Stop Switch |
OTHER
Locks on External Enclosure Doors |
Lockable Fuel Cap |
Beacon Socket |
Rear Reflectors |
OPERATOR ENVIRONMENT
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 |