Mini Excavators, 309 CR Mini Hydraulic Excavator, Cat C3.3B
Mini Excavators
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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Specifications
| Note | The 309 CR specifications are based on a machine configured with a Long (L) Undercarriage. |
Weights
| 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. |
Travel System
| Gradeability - Maximum | 30 degrees |
Hydraulic System
| Type | Load Sensing Hydraulics with Variable Displacement Piston Pump |
| Note | Flow and pressure are not combinable. Under load, as flow rises pressure goes down. |
Engine
| Engine Model | Cat C3.3B |
Swing System
| Boom Swing - Right | 50 degrees |
| Boom Swing - Left | 60 degrees |
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
| Note | European Union Directive "2000/14/EC" |
Dimensions - Standard Stick
| 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. |
Dimensions - Long Stick
| 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. |
| Overall Shipping Length - with Counterweight | 7052 mm (277.6 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. |
Sustainability
| Recyclability | 96% |
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Engine
| Net Power | 51.8 kW |
| Displacement | 3.33 l |
| Bore | 94 mm |
| Stroke | 120 mm |
| Gross Power - SAE J1995 | 55.4 kW |
| Rated Net Power - 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269 | 51.8 kW |
Weights
| Operating Weight | 9565 kg |
| Maximum Operating Weight with Cab** | 9565 kg |
| Minimum Operating Weight with Cab* | 8950 kg |
Dimensions - Long Stick
| Dig Depth | 4642 mm |
| Maximum Dump Clearance | 5072 mm |
| Boom In Reach | 3215 mm |
| Vertical Wall | 3404 mm |
| Maximum Blade Depth | 671 mm |
| O/A Undercarriage Length | 3200 mm |
| O/A Track Width | 2470 mm |
| Stick Length | 2358 mm |
| Maximum Blade Height | 408 mm |
| Maximum Dig Height | 7039 mm |
| Tail Swing with Counterweight | 1585 mm |
| Maximum Reach | 7637 mm |
| Cab Height | 2541 mm |
| Ground Clearance | 356 mm |
| Swing Bearing - Height | 756 mm |
| Track Belt/Shoe Width | 450 mm |
| Boom Swing - Left | 604 mm |
| Boom Swing - Right | 935 mm |
| Tail Swing without Counterweight | 1450 mm |
| Maximum Reach - Ground Level | 7460 mm |
| Height - Boom Transport - No Tools* | 2260 mm |
| Height - Boom Working - With Tools** | 3050 mm |
Weight Increase from Minimum Configuration
| Steel Tracks with Pads | 330 kg |
| Long Stick | 66 kg |
| Counterweight | 250 kg |
Travel System
| Ground Pressure - Minimum Weight | 34.7 kPa |
| Ground Pressure - Maximum Weight | 37.1 kPa |
| Travel Speed - High | 4.9 km/h |
| Travel Speed - Low | 2.6 km/h |
| Maximum Traction Force - High Speed | 28.9 kN |
| Maximum Traction Force - Low Speed | 84.8 kN |
Service Refill Capacities
| Engine Oil | 11.2 l |
| Fuel Tank | 147 l |
| Hydraulic System | 110 l |
| Cooling System | 10 l |
| Hydraulic Tank | 53 l |
Hydraulic System
| Operating Pressure - Swing | 250 bar |
| Digging Force - Stick - Standard | 42.3 kN |
| Digging Force - Stick - Long | 35.7 kN |
| Operating Pressure - Travel | 285 bar |
| Pump Flow at 2,400 rpm | 233 l/min |
| Digging Force - Bucket | 62 kN |
| Operating Pressure - Equipment | 285 bar |
| Maximum Auxiliary Circuit - Secondary - Flow at Pump | 33 l/min |
| Maximum Auxiliary Circuit - Primary - Pressure at Pump | 285 bar |
| Maximum Auxiliary Circuit - Primary - Flow at Pump | 131 l/min |
| Maximum Auxiliary Circuit - Secondary - Pressure at Pump | 285 bar |
| Maximum Auxiliary Circuit - High Flow - Pressure at Pump | 285 bar |
| Maximum Auxiliary Circuit - High Flow - Flow at Pump | 140 l/min |
Swing System
| Machine Swing Speed | 10.6 r/min |
Blade
| Height | 431 mm |
| Width - Wide | 2640 mm |
| Width - Standard | 2470 mm |
Sound
| Average Exterior Sound Pressure (ISO 6395:2008) | 99 dB(A) |
| Operator Sound Pressure (ISO 6396:2008) | 72 dB(A) |
Dimensions - Standard Stick
| Boom Swing - Right | 935 mm |
| Maximum Dump Clearance | 4760 mm |
| Tail Swing without Counterweight | 1450 mm |
| Maximum Reach - Ground Level | 6949 mm |
| O/A Undercarriage Length | 3200 mm |
| Cab Height | 2541 mm |
| Swing Bearing - Height | 756 mm |
| Maximum Dig Height | 6736 mm |
| Track Belt/Shoe Width | 450 mm |
| O/A Track Width | 2470 mm |
| Ground Clearance | 356 mm |
| Maximum Reach | 7141 mm |
| Tail Swing with Counterweight | 1585 mm |
| Boom In Reach | 3059 mm |
| Vertical Wall | 2991 mm |
| Dig Depth | 4108 mm |
| Stick Length | 1820 mm |
| Boom Swing - Left | 604 mm |
| Maximum Blade Height | 408 mm |
| Maximum Blade Depth | 671 mm |
| Overall Shipping Length - without Counterweight | 6774 mm |
| Overall Shipping Length - with Counterweight | 6774 mm |
| Height - Boom Transport - No Tools* | 2430 mm |
| Height - Boom Working - With Tools** | 2660 mm |
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ENGINE
- - Cat C3.3B 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)
HYDRAULICS
- - Electronic Variable Displacement Piston Pump
- - Load Sensing/Flow Sharing Hydraulics
- - Dedicated Auxiliary Hydraulic Pump
- - Power On Demand
- - Hydraulic Temperature Monitoring
- - Certified Accumulator
- - HYDO Advanced Hydraulic Oil
- - Ecology Drain
OPERATOR ENVIRONMENT
- - Top Guard ISO 10262 1998 Level I
- - ROPS ISO 12117-2:2008
- - 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
- - Tie Down Eyes on Track Frame
- - Dozer Blade
- - Dozer Float
- - Bolt-on, Reversible Wear Edge
BOOM, STICK AND LINKAGES
- - One Piece Boom (3400 mm/133.9 in)
- - 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
- - 60 Ampere Alternator
- - Circuit Breaker
- - 900 CCA Maintenance Free Battery
- - Battery Disconnect
- - Ignition Key Stop Switch
- - Travel Alarm
OTHER
- - Locks on External Enclosure Doors
- - Lockable Fuel Cap
- - Beacon Socket
- - Rear Reflectors
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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
UNDERCARRIAGE
- - 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
BOOM, STICK AND LINKAGES
- - Long Stick (2360 mm/92.9 in)
- - Attachments including Buckets, Augers and Hammers
- - 2nd Auxiliary Hydraulic Lines with Case Drain
- - Boom Lowering Check Valve
- - Stick Lowering Check Valve
- - Certified Lifting Eye
ELECTRICAL
- - Product Link™ Elite (regulations apply)
- - Rearview Camera
- - Rotating Beacon
GUARDING
- - Mesh Front Guard ISO 10262 1998 Level I
- - Heavy Duty Front Guard ISO 10262 1998 Level II
- - Top Guard ISO 10262 1998 Level II
- - Polycarbonate Front Window EN356 P5A (Cab Only)
- - Track Guards
OTHER
- - Additional Counterweight
- - Water Jacket Heater
- - Refueling Pump
- - Variable Angle Boom (refer to 309 CR VAB brochure for VAB specs and additional information)
