Get a quote306 CR Mini Hydraulic Excavator
Mini Excavators Inspired by Our Customers
More Comfort – More Performance – More Versatility
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4 Industry First Features
Cat Exclusives in a Mini Excavator
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Up to 10% Lower Total Ownership Costs
with improved fuel efficiency and longer service intervals
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Up to 20% More Performance
with customizable operator settings and improvements in lift, swing, travel and multifunction
Engine
Bore | 3.4 in |
Displacement | 148 in³ |
Engine Model | Cat C2.4 Turbo |
Gross Power - ISO 14396 | 57.9 hp |
Net Power | 55.9 hp |
Net Power @ 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269 | 55.9 hp |
Stroke | 4 in |
Weights
Maximum Operating Weight with Cab** | 15766 lb |
Maximum Operating Weight with Canopy** | 15633 lb |
Minimum Operating Weight with Cab* | 14266 lb |
Minimum Operating Weight with Canopy* | 14134 lb |
Note (1) | *Minimum Weight is based on rubber tracks, operator, full fuel tank, standard stick, fixed blade and no bucket. |
Note (2) | **Maximum Weight is based on steel tracks with pads, extra counterweight, operator, full fuel tank, long stick, fixed blade and no bucket. |
Operating Weight | 15766 lb |
Weight Increase from Minimum Configuration
Angle Blade | 225 lb |
Counterweight | 551 lb |
Long Stick | 97 lb |
Steel Tracks with Pads | 827 lb |
XTC Carriage (no tool) | 141 lb |
Travel System
Gradeability - Maximum | 30 degrees |
Ground Pressure - Maximum Weight | 5.7 psi |
Ground Pressure - Minimum Weight | 5.1 psi |
Maximum Traction Force - High Speed | 6969 lbf |
Maximum Traction Force - Low Speed | 12589 lbf |
Travel Speed - High | 3.1 mile/h |
Travel Speed - Low | 1.7 mile/h |
Service Refill Capacities
Cooling System | 2.6 gal (US) |
Engine Oil | 2.1 gal (US) |
Fuel Tank | 34.3 gal (US) |
Hydraulic System | 27.5 gal (US) |
Hydraulic Tank | 14 gal (US) |
Hydraulic System
Auxiliary Circuit - Primary - Flow | 24 gal/min |
Auxiliary Circuit - Primary - Pressure | 3553 psi |
Auxiliary Circuit - Secondary - Flow | 9 gal/min |
Auxiliary Circuit - Secondary - Pressure | 3553 psi |
Digging Force - Bucket | 11578 lbf |
Digging Force - Stick - Long | 5957 lbf |
Digging Force - Stick - Standard | 6632 lbf |
Operating Pressure - Equipment | 3553 psi |
Operating Pressure - Swing | 3263 psi |
Operating Pressure - Travel | 3553 psi |
Pump Flow at 2,400 rpm | 40 gal/min |
Type | Load Sensing Hydraulics with Variable Displacement Piston Pump |
Swing System
Boom Swing - Left | 60 degrees |
Boom Swing - Right | 65 degrees |
Machine Swing Speed | 11 r/min |
Blade
Angle Blade Height | 15.7 in |
Angle Blade Width | 78 in |
Straight Blade Height | 15.4 in |
Straight Blade Width | 78 in |
Certification - Cab
Roll Over Protective Structure (ROPS) | ISO 12117-2:2008 |
Tip Over Protective Structure (TOPS) | ISO 12117:1997 |
Top Guard | ISO 10262:1998 (Level II) |
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 In Reach | 98 in |
Boom Swing - Left | 29 in |
Boom Swing - Right | 36 in |
Cab Height | 100 in |
Dig Depth | 146 in |
Ground Clearance | 12 in |
Maximum Blade Depth | 24 in |
Maximum Blade Height | 16 in |
Maximum Dig Height | 230 in |
Maximum Dump Clearance | 170 in |
Maximum Reach | 248 in |
Maximum Reach - Ground Level | 241 in |
O/A Shipping Length | 235 in |
O/A Track Width | 78 in |
O/A Undercarriage Length | 102 in |
Stick Length | 62 in |
Swing Bearing - Height | 27 in |
Tail Swing with Counterweight | 58 in |
Tail Swing without Counterweight | 53 in |
Track Belt/Shoe Width | 16 in |
Transport Height | 69 in |
Vertical Wall | 107 in |
Width over Upper House | 77 in |
Dimensions - Long Stick
Boom In Reach | 117 in |
Boom Swing - Left | 29 in |
Boom Swing - Right | 36 in |
Cab Height | 100 in |
Dig Depth | 162 in |
Ground Clearance | 12 in |
Maximum Blade Depth | 24 in |
Maximum Blade Height | 16 in |
Maximum Dig Height | 241 in |
Maximum Dump Clearance | 182 in |
Maximum Reach | 263 in |
Maximum Reach - Ground Level | 257 in |
O/A Shipping Length | 234 in |
O/A Track Width | 78 in |
O/A Undercarriage Length | 102 in |
Stick Length | 78 in |
Swing Bearing - Height | 27 in |
Tail Swing with Counterweight | 58 in |
Tail Swing without Counterweight | 53 in |
Track Belt/Shoe Width | 16 in |
Transport Height | 95 in |
Vertical Wall | 125 in |
Width over Upper House | 77 in |
Air Conditioning System
Air Conditioning | The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1287). The system contains 0.9 kg of refrigerant which has a CO2 equivalent of 1.287 metric tonnes. |
Sustainability
Recyclability | 96% |
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306 CR Product Brochure
Cat Mini Hydraulic Excavators Product Line Brochure (North America)
Cat Mini Hydraulic Excavators Product Line Brochure (Europe)
Options And Accessories Kit Guide for Mini Hydraulic Excavators
Cat Attachments for Mini Excavators Brochure
Attachment Compatibility Guide for Mini Excavators
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Engine
Bore | 3.4 in |
Displacement | 148 in³ |
Engine Model | Cat C2.4 Turbo |
Gross Power - ISO 14396 | 57.9 hp |
Net Power | 55.9 hp |
Net Power @ 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269 | 55.9 hp |
Stroke | 4 in |
Weights
Maximum Operating Weight with Cab** | 15766 lb |
Maximum Operating Weight with Canopy** | 15633 lb |
Minimum Operating Weight with Cab* | 14266 lb |
Minimum Operating Weight with Canopy* | 14134 lb |
Note (1) | *Minimum Weight is based on rubber tracks, operator, full fuel tank, standard stick, fixed blade and no bucket. |
Note (2) | **Maximum Weight is based on steel tracks with pads, extra counterweight, operator, full fuel tank, long stick, fixed blade and no bucket. |
Operating Weight | 15766 lb |
Weight Increase from Minimum Configuration
Angle Blade | 225 lb |
Counterweight | 551 lb |
Long Stick | 97 lb |
Steel Tracks with Pads | 827 lb |
XTC Carriage (no tool) | 141 lb |
Travel System
Gradeability - Maximum | 30 degrees |
Ground Pressure - Maximum Weight | 5.7 psi |
Ground Pressure - Minimum Weight | 5.1 psi |
Maximum Traction Force - High Speed | 6969 lbf |
Maximum Traction Force - Low Speed | 12589 lbf |
Travel Speed - High | 3.1 mile/h |
Travel Speed - Low | 1.7 mile/h |
Service Refill Capacities
Cooling System | 2.6 gal (US) |
Engine Oil | 2.1 gal (US) |
Fuel Tank | 34.3 gal (US) |
Hydraulic System | 27.5 gal (US) |
Hydraulic Tank | 14 gal (US) |
Hydraulic System
Auxiliary Circuit - Primary - Flow | 24 gal/min |
Auxiliary Circuit - Primary - Pressure | 3553 psi |
Auxiliary Circuit - Secondary - Flow | 9 gal/min |
Auxiliary Circuit - Secondary - Pressure | 3553 psi |
Digging Force - Bucket | 11578 lbf |
Digging Force - Stick - Long | 5957 lbf |
Digging Force - Stick - Standard | 6632 lbf |
Operating Pressure - Equipment | 3553 psi |
Operating Pressure - Swing | 3263 psi |
Operating Pressure - Travel | 3553 psi |
Pump Flow at 2,400 rpm | 40 gal/min |
Type | Load Sensing Hydraulics with Variable Displacement Piston Pump |
Swing System
Boom Swing - Left | 60 degrees |
Boom Swing - Right | 65 degrees |
Machine Swing Speed | 11 r/min |
Blade
Angle Blade Height | 15.7 in |
Angle Blade Width | 78 in |
Straight Blade Height | 15.4 in |
Straight Blade Width | 78 in |
Certification - Cab
Roll Over Protective Structure (ROPS) | ISO 12117-2:2008 |
Tip Over Protective Structure (TOPS) | ISO 12117:1997 |
Top Guard | ISO 10262:1998 (Level II) |
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 In Reach | 98 in |
Boom Swing - Left | 29 in |
Boom Swing - Right | 36 in |
Cab Height | 100 in |
Dig Depth | 146 in |
Ground Clearance | 12 in |
Maximum Blade Depth | 24 in |
Maximum Blade Height | 16 in |
Maximum Dig Height | 230 in |
Maximum Dump Clearance | 170 in |
Maximum Reach | 248 in |
Maximum Reach - Ground Level | 241 in |
O/A Shipping Length | 235 in |
O/A Track Width | 78 in |
O/A Undercarriage Length | 102 in |
Stick Length | 62 in |
Swing Bearing - Height | 27 in |
Tail Swing with Counterweight | 58 in |
Tail Swing without Counterweight | 53 in |
Track Belt/Shoe Width | 16 in |
Transport Height | 69 in |
Vertical Wall | 107 in |
Width over Upper House | 77 in |
Dimensions - Long Stick
Boom In Reach | 117 in |
Boom Swing - Left | 29 in |
Boom Swing - Right | 36 in |
Cab Height | 100 in |
Dig Depth | 162 in |
Ground Clearance | 12 in |
Maximum Blade Depth | 24 in |
Maximum Blade Height | 16 in |
Maximum Dig Height | 241 in |
Maximum Dump Clearance | 182 in |
Maximum Reach | 263 in |
Maximum Reach - Ground Level | 257 in |
O/A Shipping Length | 234 in |
O/A Track Width | 78 in |
O/A Undercarriage Length | 102 in |
Stick Length | 78 in |
Swing Bearing - Height | 27 in |
Tail Swing with Counterweight | 58 in |
Tail Swing without Counterweight | 53 in |
Track Belt/Shoe Width | 16 in |
Transport Height | 95 in |
Vertical Wall | 125 in |
Width over Upper House | 77 in |
Air Conditioning System
Air Conditioning | The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1287). The system contains 0.9 kg of refrigerant which has a CO2 equivalent of 1.287 metric tonnes. |
Sustainability
Recyclability | 96% |