The Cat® 306 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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Engine
- Net Power
- 55.9 hp
- Engine Model
- Cat C2.4 Turbo
- Displacement
- 148 in³
- Bore
- 3.4 in
- Stroke
- 4 in
- Net Power @ 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269
- 55.9 hp
- Gross Power - ISO 14396
- 57.9 hp
Weights
- Operating Weight
- 15,766 lb
- Minimum Operating Weight with Canopy*
- 14,134 lb
- Maximum Operating Weight with Canopy**
- 15,633 lb
- Note (2)
- **Maximum Weight is based on steel tracks with pads, extra counterweight, operator, full fuel tank, long stick, fixed blade and no bucket.
- Maximum Operating Weight with Cab**
- 15,766 lb
- Minimum Operating Weight with Cab*
- 14,266 lb
- Note (1)
- *Minimum Weight is based on rubber tracks, operator, full fuel tank, standard stick, fixed blade and no bucket.
Dimensions - Long Stick
- Dig Depth
- 162 in
- Maximum Blade Height
- 16 in
- O/A Track Width
- 78 in
- Track Belt/Shoe Width
- 16 in
- Tail Swing with Counterweight
- 58 in
- Vertical Wall
- 125 in
- Boom In Reach
- 117 in
- Maximum Blade Depth
- 24 in
- Maximum Dig Height
- 241 in
- Transport Height
- 95 in
- Stick Length
- 78 in
- Ground Clearance
- 12 in
- Swing Bearing - Height
- 27 in
- Width over Upper House
- 77 in
- O/A Undercarriage Length
- 102 in
- O/A Shipping Length
- 234 in
- Cab Height
- 100 in
- Maximum Reach
- 263 in
- Boom Swing - Left
- 29 in
- Tail Swing without Counterweight
- 53 in
- Boom Swing - Right
- 36 in
- Maximum Dump Clearance
- 182 in
- Maximum Reach - Ground Level
- 257 in
Weight Increase from Minimum Configuration
- Counterweight
- 551 lb
- Long Stick
- 97 lb
- Steel Tracks with Pads
- 827 lb
- Angle Blade
- 225 lb
- XTC Carriage (no tool)
- 141 lb
Travel System
- Ground Pressure - Minimum Weight
- 5.1 psi
- Ground Pressure - Maximum Weight
- 5.7 psi
- Gradeability - Maximum
- 30 degrees
- Maximum Traction Force - High Speed
- 6,969 lbf
- Maximum Traction Force - Low Speed
- 12,589 lbf
- Travel Speed - High
- 3.1 mile/h
- Travel Speed - Low
- 1.7 mile/h
Service Refill Capacities
- Cooling System
- 2.6 gal (US)
- Hydraulic System
- 27.5 gal (US)
- Hydraulic Tank
- 14 gal (US)
- Engine Oil
- 2.1 gal (US)
- Fuel Tank
- 34.3 gal (US)
Hydraulic System
- Operating Pressure - Travel
- 3,553 psi
- Auxiliary Circuit - Primary - Flow
- 24 gal/min
- Digging Force - Bucket
- 11,578 lbf
- Auxiliary Circuit - Primary - Pressure
- 3,553 psi
- Type
- Load Sensing Hydraulics with Variable Displacement Piston Pump
- Auxiliary Circuit - Secondary - Flow
- 9 gal/min
- Operating Pressure - Equipment
- 3,553 psi
- Auxiliary Circuit - Secondary - Pressure
- 3,553 psi
- Digging Force - Stick - Standard
- 6,632 lbf
- Operating Pressure - Swing
- 3,263 psi
- Digging Force - Stick - Long
- 5,957 lbf
- Pump Flow at 2,400 rpm
- 40 gal/min
Swing System
- Boom Swing - Right
- 65 degrees
- Boom Swing - Left
- 60 degrees
- Machine Swing Speed
- 11 r/min
Blade
- Straight Blade Width
- 78 in
- Angle Blade Width
- 78 in
- Straight Blade Height
- 15.4 in
- Angle Blade Height
- 15.7 in
Certification - Cab
- Top Guard
- ISO 10,262:1,998 (Level II)
- Roll Over Protective Structure (ROPS)
- ISO 12,117-2:2,008
- Tip Over Protective Structure (TOPS)
- ISO 12,117:1,997
Sound
- Operator Sound Pressure (ISO 6396:2008)
- 72 dB(A)
- Average Exterior Sound Pressure (ISO 6395:2008)
- 99 dB(A)
- Note
- European Union Directive “2,000/14/EC”
Dimensions - Standard Stick
- Track Belt/Shoe Width
- 16 in
- Maximum Reach
- 248 in
- Stick Length
- 62 in
- Vertical Wall
- 107 in
- Swing Bearing - Height
- 27 in
- Maximum Reach - Ground Level
- 241 in
- Maximum Blade Height
- 16 in
- Ground Clearance
- 12 in
- Boom In Reach
- 98 in
- Boom Swing - Right
- 36 in
- Transport Height
- 69 in
- Tail Swing with Counterweight
- 58 in
- Cab Height
- 100 in
- Width over Upper House
- 77 in
- Maximum Dump Clearance
- 170 in
- Tail Swing without Counterweight
- 53 in
- Boom Swing - Left
- 29 in
- O/A Undercarriage Length
- 102 in
- Maximum Dig Height
- 230 in
- Maximum Blade Depth
- 24 in
- O/A Track Width
- 78 in
- Dig Depth
- 146 in
- O/A Shipping Length
- 235 in
Air Conditioning System
- Air Conditioning
- The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1,287). The system contains 0.9 kg of refrigerant which has a CO2 equivalent of 1.287 metric tonnes.
Sustainability
- Recyclability
- 96%
Standard Equipment:
-
- Operator Environment – Cab And Canopy
-
- 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
- Hydraulic Lockout Controls
- High Back, Suspension Seat
- Retractable Seat Belt (75 mm/3 in)
- Coat Hook
- Cup Holder
- Literature Holder
- Mounting Bosses for Top and Front Guards
- Signaling/Warning Horn
- Cab and (left side) Boom Work Lights
- Utility Space for Mobile Phone
- Next Generation Color LCD Monitor (IP66)
– 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
-
- Operator Environment – Cab Only
-
- Operator Sound Pressure 72 dB(A) ISO 6396:2008
- HVAC with Automatic Temperature Control
- Integrated Lower Front Window
- Assisted Front Window Overhead Storage
- Rear Window Emergency Exit
- LED Interior Light
- 12V Power Socket
- Radio – Bluetooth®, Auxiliary, Microphone, USB (charging only)
- Skylight
- Jog dial interface
-
- Undercarriage
-
- Greased and Lubricated Track
- Hydraulic Track Adjusters
- Tie Down Eyes on Track Frame
- Dozer Straight Blade
- Dozer Float
- Bolt-on, Reversible Wear Edge
- Rubber Tracks
-
- Boom, Stick And Linkages
-
- One Piece Boom (3055 mm/120.3 in)
- Standard Stick (1580 mm/62.2 in)
- Front Shovel Capable – Pin-on/Manual Coupler/Hydraulic Coupler for Cat Tools
- Thumb Ready
-
- Electrical
-
- 12 Volt Electrical System
- 90 Ampere Alternator
- 650 CCA Maintenance Free Battery
- Battery Disconnect
- Circuit Breaker
- Ignition Key Stop Switch
- Signaling/Warning Horn
- Product Link™ Basic (regulations apply)
- Travel Alarm
-
- Other
-
- Locks on External Enclosure Doors
- Lockable Fuel Cap
- Beacon Socket
- Rear Reflectors
Optional Equipment:
-
- Operator Environment – Cab And Canopy
-
- 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
-
- Operator Environment – Cab Only
-
- Cab Heat Only
- Air Suspension Heated Seat
-
- Undercarriage
-
- Angle Blade
- Extra Tool Carrier (XTC)
- Steel Tracks (450 mm/17.7 in wide)
- Steel Track with Rubber Pads
-
- Boom, Stick And Linkages
-
- Long Stick (190 mm/78 in)
- Attachments including Buckets, Augers and Hammers
- 2nd Auxiliary Hydraulic Lines
- Boom Lowering Check Valve
- Stick Lowering Check Valve
- Certified Lifting Eye
-
- Electrical
-
- Product Link Elite (regulations apply)
- Camera
- Rotating Beacon
-
- Guarding
-
- Heavy Duty Front Guard ISO 10262 1998 Level II
- Mesh Front Guard ISO 10262 1998 Level I
- Overhead Cab Guard ISO 10262 1998 Level II
- Polycarbonate Front Window EN356 P5A (Cab Only)
- Track Guards
-
- Other
-
- Additional Counterweight
- Water Jacket Heater
- Refueling Pump
Specifications
Engine
- Net Power
- 55.9 hp
- Engine Model
- Cat C2.4 Turbo
- Displacement
- 148 in³
- Bore
- 3.4 in
- Stroke
- 4 in
- Net Power @ 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269
- 55.9 hp
- Gross Power - ISO 14396
- 57.9 hp
Weights
- Operating Weight
- 15,766 lb
- Minimum Operating Weight with Canopy*
- 14,134 lb
- Maximum Operating Weight with Canopy**
- 15,633 lb
- Note (2)
- **Maximum Weight is based on steel tracks with pads, extra counterweight, operator, full fuel tank, long stick, fixed blade and no bucket.
- Maximum Operating Weight with Cab**
- 15,766 lb
- Minimum Operating Weight with Cab*
- 14,266 lb
- Note (1)
- *Minimum Weight is based on rubber tracks, operator, full fuel tank, standard stick, fixed blade and no bucket.
Dimensions - Long Stick
- Dig Depth
- 162 in
- Maximum Blade Height
- 16 in
- O/A Track Width
- 78 in
- Track Belt/Shoe Width
- 16 in
- Tail Swing with Counterweight
- 58 in
- Vertical Wall
- 125 in
- Boom In Reach
- 117 in
- Maximum Blade Depth
- 24 in
- Maximum Dig Height
- 241 in
- Transport Height
- 95 in
- Stick Length
- 78 in
- Ground Clearance
- 12 in
- Swing Bearing - Height
- 27 in
- Width over Upper House
- 77 in
- O/A Undercarriage Length
- 102 in
- O/A Shipping Length
- 234 in
- Cab Height
- 100 in
- Maximum Reach
- 263 in
- Boom Swing - Left
- 29 in
- Tail Swing without Counterweight
- 53 in
- Boom Swing - Right
- 36 in
- Maximum Dump Clearance
- 182 in
- Maximum Reach - Ground Level
- 257 in
Weight Increase from Minimum Configuration
- Counterweight
- 551 lb
- Long Stick
- 97 lb
- Steel Tracks with Pads
- 827 lb
- Angle Blade
- 225 lb
- XTC Carriage (no tool)
- 141 lb
Travel System
- Ground Pressure - Minimum Weight
- 5.1 psi
- Ground Pressure - Maximum Weight
- 5.7 psi
- Gradeability - Maximum
- 30 degrees
- Maximum Traction Force - High Speed
- 6,969 lbf
- Maximum Traction Force - Low Speed
- 12,589 lbf
- Travel Speed - High
- 3.1 mile/h
- Travel Speed - Low
- 1.7 mile/h
Service Refill Capacities
- Cooling System
- 2.6 gal (US)
- Hydraulic System
- 27.5 gal (US)
- Hydraulic Tank
- 14 gal (US)
- Engine Oil
- 2.1 gal (US)
- Fuel Tank
- 34.3 gal (US)
Hydraulic System
- Operating Pressure - Travel
- 3,553 psi
- Auxiliary Circuit - Primary - Flow
- 24 gal/min
- Digging Force - Bucket
- 11,578 lbf
- Auxiliary Circuit - Primary - Pressure
- 3,553 psi
- Type
- Load Sensing Hydraulics with Variable Displacement Piston Pump
- Auxiliary Circuit - Secondary - Flow
- 9 gal/min
- Operating Pressure - Equipment
- 3,553 psi
- Auxiliary Circuit - Secondary - Pressure
- 3,553 psi
- Digging Force - Stick - Standard
- 6,632 lbf
- Operating Pressure - Swing
- 3,263 psi
- Digging Force - Stick - Long
- 5,957 lbf
- Pump Flow at 2,400 rpm
- 40 gal/min
Swing System
- Boom Swing - Right
- 65 degrees
- Boom Swing - Left
- 60 degrees
- Machine Swing Speed
- 11 r/min
Blade
- Straight Blade Width
- 78 in
- Angle Blade Width
- 78 in
- Straight Blade Height
- 15.4 in
- Angle Blade Height
- 15.7 in
Certification - Cab
- Top Guard
- ISO 10,262:1,998 (Level II)
- Roll Over Protective Structure (ROPS)
- ISO 12,117-2:2,008
- Tip Over Protective Structure (TOPS)
- ISO 12,117:1,997
Sound
- Operator Sound Pressure (ISO 6396:2008)
- 72 dB(A)
- Average Exterior Sound Pressure (ISO 6395:2008)
- 99 dB(A)
- Note
- European Union Directive “2,000/14/EC”
Dimensions - Standard Stick
- Track Belt/Shoe Width
- 16 in
- Maximum Reach
- 248 in
- Stick Length
- 62 in
- Vertical Wall
- 107 in
- Swing Bearing - Height
- 27 in
- Maximum Reach - Ground Level
- 241 in
- Maximum Blade Height
- 16 in
- Ground Clearance
- 12 in
- Boom In Reach
- 98 in
- Boom Swing - Right
- 36 in
- Transport Height
- 69 in
- Tail Swing with Counterweight
- 58 in
- Cab Height
- 100 in
- Width over Upper House
- 77 in
- Maximum Dump Clearance
- 170 in
- Tail Swing without Counterweight
- 53 in
- Boom Swing - Left
- 29 in
- O/A Undercarriage Length
- 102 in
- Maximum Dig Height
- 230 in
- Maximum Blade Depth
- 24 in
- O/A Track Width
- 78 in
- Dig Depth
- 146 in
- O/A Shipping Length
- 235 in
Air Conditioning System
- Air Conditioning
- The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1,287). The system contains 0.9 kg of refrigerant which has a CO2 equivalent of 1.287 metric tonnes.
Sustainability
- Recyclability
- 96%
Standard/Optional Features
Standard Equipment:
-
- Operator Environment – Cab And Canopy
-
- 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
- Hydraulic Lockout Controls
- High Back, Suspension Seat
- Retractable Seat Belt (75 mm/3 in)
- Coat Hook
- Cup Holder
- Literature Holder
- Mounting Bosses for Top and Front Guards
- Signaling/Warning Horn
- Cab and (left side) Boom Work Lights
- Utility Space for Mobile Phone
- Next Generation Color LCD Monitor (IP66)
– 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
-
- Operator Environment – Cab Only
-
- Operator Sound Pressure 72 dB(A) ISO 6396:2008
- HVAC with Automatic Temperature Control
- Integrated Lower Front Window
- Assisted Front Window Overhead Storage
- Rear Window Emergency Exit
- LED Interior Light
- 12V Power Socket
- Radio – Bluetooth®, Auxiliary, Microphone, USB (charging only)
- Skylight
- Jog dial interface
-
- Undercarriage
-
- Greased and Lubricated Track
- Hydraulic Track Adjusters
- Tie Down Eyes on Track Frame
- Dozer Straight Blade
- Dozer Float
- Bolt-on, Reversible Wear Edge
- Rubber Tracks
-
- Boom, Stick And Linkages
-
- One Piece Boom (3055 mm/120.3 in)
- Standard Stick (1580 mm/62.2 in)
- Front Shovel Capable – Pin-on/Manual Coupler/Hydraulic Coupler for Cat Tools
- Thumb Ready
-
- Electrical
-
- 12 Volt Electrical System
- 90 Ampere Alternator
- 650 CCA Maintenance Free Battery
- Battery Disconnect
- Circuit Breaker
- Ignition Key Stop Switch
- Signaling/Warning Horn
- Product Link™ Basic (regulations apply)
- Travel Alarm
-
- Other
-
- Locks on External Enclosure Doors
- Lockable Fuel Cap
- Beacon Socket
- Rear Reflectors
Optional Equipment:
-
- Operator Environment – Cab And Canopy
-
- 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
-
- Operator Environment – Cab Only
-
- Cab Heat Only
- Air Suspension Heated Seat
-
- Undercarriage
-
- Angle Blade
- Extra Tool Carrier (XTC)
- Steel Tracks (450 mm/17.7 in wide)
- Steel Track with Rubber Pads
-
- Boom, Stick And Linkages
-
- Long Stick (190 mm/78 in)
- Attachments including Buckets, Augers and Hammers
- 2nd Auxiliary Hydraulic Lines
- Boom Lowering Check Valve
- Stick Lowering Check Valve
- Certified Lifting Eye
-
- Electrical
-
- Product Link Elite (regulations apply)
- Camera
- Rotating Beacon
-
- Guarding
-
- Heavy Duty Front Guard ISO 10262 1998 Level II
- Mesh Front Guard ISO 10262 1998 Level I
- Overhead Cab Guard ISO 10262 1998 Level II
- Polycarbonate Front Window EN356 P5A (Cab Only)
- Track Guards
-
- Other
-
- Additional Counterweight
- Water Jacket Heater
- Refueling Pump