306 CR Mini Hydraulic Excavator
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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306 CR Mini Hydraulic Excavator
306 CR Mini Hydraulic Excavator
306 CR Mini Hydraulic Excavator
306 CR Mini Hydraulic Excavator
Product Videos
Virtual Product Tour (VPT)
Virtual Product Tour
Specifications
| Name | Type | Value | Unit Value (Imperial) | Unit Name | Unit Value (Metric) | Unit Name (Metric) |
|---|---|---|---|---|---|---|
| Net Power | measurement | 55.9 | hp | 41.7 | kW | |
| Gross Power - ISO 14396 | measurement | 57.9 | hp | 43.2 | kW | |
| Displacement | measurement | 148 | in³ | 2.43 | l |
Documents & Spec Sheets
Cat Mini Hydraulic Excavators Product Line Brochure (North America)
DownloadCat Mini Hydraulic Excavators Product Line Brochure (Europe)
DownloadOptions And Accessories Kit Guide for Mini Hydraulic Excavators
Options And Accessories Kit Guide for Mini Hydraulic Excavators
DownloadCat Attachments for Mini Excavators Brochure
DownloadAttachment Compatibility Guide for Mini Excavators
DownloadFeatures & Benefits
ALL DAY COMFORT
- Your choice of a canopy (availability dependent on region) or a sealed and pressurized cab equipped with an improved air conditioning system, adjustable wrist rests and a suspension seat to help keep you working comfortably all day long.
EASY TO OPERATE
- Controls are easy to use and the intuitive Next Generation Monitor provides customizable machine operator preferences and easy to read machine information.
STICK STEER TRAVEL MODE
- Moving around the job site is even easier with Cat Stick Steer. Easily switch from traditional travel controls with levers and pedals to joystick controls with a push of a button. The benefit of less effort and improved control is in your hands!
BIG PERFORMANCE IN A MINI DESIGN
- Increased lifting, swinging, travel and multi-functioning performance help you get the job done more efficiently.
SAFETY ON THE JOB SITE
- Your safety is our top priority. The Cat Mini Excavator is designed to help keep you safe on the job. An optional back-up camera, courtesy work lights and a fluorescent retractable seat belt are just a few of the safety features we've built into the machine.
SIMPLE SERVICE FOR LESS DOWNTIME
- Maintenance is quick and easy on the Cat Mini Excavator. Routine check points are easy to access at ground level with grouped service points and robust service panels.
LOWER OPERATING COSTS
- Equipped with features such as auto idle, auto engine shutdown, and efficient hydraulics with a variable displacement pump, the Cat Mini Excavator was designed with reducing your operating costs in mind.
CHOICES
- Configure the machine to meet your specific application needs with a straight blade, angle blade, or Extra Tool Carrier (XTC).
UNMATCHED DEALER SUPPORT
- Your Cat dealer is here to help you reach your business goals. From providing equipment solutions to operator training to service needs and beyond, your Cat dealer is ready to help.
SUSTAINABILITY
- The Cat® C2.4 engine meets U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 emission standards.
- Cat diesel engines are required to use ULSD (ultra-low sulfur diesel fuel with 15 ppm of sulfur or less) or ULSD blended with the following lower-carbon intensity fuels up to: 20% biodiesel FAME (fatty acid methyl ester) * or 100% renewable diesel, HVO (hydrotreated vegetable oil) and GTL (gas-to-liquid) fuels. Refer to guidelines for successful application. Please consult your Cat dealer or “Caterpillar Machine Fluids Recommendations” (SEBU6250) for details.
- Auto Idle helps reduce unnecessary fuel burn and greenhouse gas emissions by allowing the engine to automatically go into idle mode when the machine is not working.
- Engine Idle Shutdown Timer reduces fuel burn, greenhouse gas emissions and unnecessary idle time by shutting down the machine after a pre-set idling period.
- Cruise control helps you maintain a constant speed as you travel across your jobsite saving fuel and reducing greenhouse gas emissions.
- The Cat® Seat Belt Reminder provides audible and visual warnings to remind operators to buckle up during machine operation. The easy-to-install system is compatible with all equipment brands to help ensure operator safety.
- Extended maintenance intervals not only reduce downtime but decrease the amount of fluid and filters that are replaced over the life of the machine.
- Remote Flash minimizes downtime and maintenance time while keeping your asset running with maximum efficiency. Alerts for machine updates are sent virtually from your Cat dealer and updates can be deployed without a dealer technician needing to be onsite.(if equipped)
- Remote Troubleshoot decreases maintenance time and keeps your machine running with maximum efficiency by allowing your Cat dealer to virtually test the machine while working. Once a problem is identified, a technician can fix it the first time, saving time and money.(if equipped)
- Cat Grade with advanced 2D and 3D technologies combine advanced guidance with optional automated machine control helping you reach grading targets while reducing fuel burn and greenhouse gas emissions by improving efficiency, job site productivity, and accuracy. (if equipped).
Complete Specifications
Engine
| Name | Type | Value | Unit Value (Imperial) | Unit Name | Unit Value (Metric) | Unit Name (Metric) |
|---|---|---|---|---|---|---|
| Net Power | measurement | 55.9 | hp | 41.7 | kW | |
| Gross Power - ISO 14396 | measurement | 57.9 | hp | 43.2 | kW | |
| Displacement | measurement | 148 | in³ | 2.43 | l | |
| Bore | measurement | 3.4 | in | 87 | mm | |
| Stroke | measurement | 4 | in | 102.4 | mm | |
| Engine Model | text | Cat C2.4 Turbo | ||||
| Net Power @ 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269 | measurement | 55.9 | hp | 41.7 | kW | |
| Operating Weight | measurement | 15766 | lb | 7150 | kg | |
| Minimum Operating Weight with Canopy* | measurement | 14134 | lb | 6410 | kg | |
| Maximum Operating Weight with Canopy** | measurement | 15633 | lb | 7090 | kg | |
| Note (2) | text | **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** | measurement | 15766 | lb | 7150 | kg | |
| Minimum Operating Weight with Cab* | measurement | 14266 | lb | 6470 | kg | |
| Note (1) | text | *Minimum Weight is based on rubber tracks, operator, full fuel tank, standard stick, fixed blade and no bucket. | ||||
| Counterweight | measurement | 551 | lb | 250 | kg | |
| Long Stick | measurement | 97 | lb | 44 | kg | |
| Steel Tracks with Pads | measurement | 827 | lb | 375 | kg | |
| Angle Blade | measurement | 225 | lb | 102 | kg | |
| XTC Carriage (no tool) | measurement | 141 | lb | 64 | kg | |
| Ground Pressure - Minimum Weight | measurement | 5.1 | psi | 35.4 | kPa | |
| Ground Pressure - Maximum Weight | measurement | 5.7 | psi | 39.1 | kPa | |
| Gradeability - Maximum | text | 30 degrees | ||||
| Maximum Traction Force - High Speed | measurement | 6969 | lbf | 31 | kN | |
| Maximum Traction Force - Low Speed | measurement | 12589 | lbf | 56 | kN | |
| Travel Speed - High | measurement | 3.1 | mile/h | 5 | km/h | |
| Travel Speed - Low | measurement | 1.7 | mile/h | 2.8 | km/h | |
| Cooling System | measurement | 2.6 | gal (US) | 10 | l | |
| Hydraulic System | measurement | 27.5 | gal (US) | 104 | l | |
| Hydraulic Tank | measurement | 14 | gal (US) | 53 | l | |
| Engine Oil | measurement | 2.1 | gal (US) | 8 | l | |
| Fuel Tank | measurement | 34.3 | gal (US) | 130 | l | |
| Operating Pressure - Travel | measurement | 3553 | psi | 24500 | kPa | |
| Auxiliary Circuit - Primary - Flow | measurement | 24 | gpm | 90 | L/min | |
| Digging Force - Bucket | measurement | 11578 | lbf | 51.5 | kN | |
| Auxiliary Circuit - Primary - Pressure | measurement | 3553 | psi | 24500 | kPa | |
| Type | text | Load Sensing Hydraulics with Variable Displacement Piston Pump | ||||
| Auxiliary Circuit - Secondary - Flow | measurement | 9 | gpm | 33 | L/min | |
| Operating Pressure - Equipment | measurement | 3553 | psi | 24500 | kPa | |
| Auxiliary Circuit - Secondary - Pressure | measurement | 3553 | psi | 24500 | kPa | |
| Digging Force - Stick - Standard | measurement | 6632 | lbf | 29.5 | kN | |
| Operating Pressure - Swing | measurement | 3263 | psi | 22500 | kPa | |
| Digging Force - Stick - Long | measurement | 5957 | lbf | 26.5 | kN | |
| Pump Flow at 2,400 rpm | measurement | 40 | gpm | 151 | L/min | |
| Boom Swing - Right | text | 65 degrees | ||||
| Boom Swing - Left | text | 60 degrees | ||||
| Machine Swing Speed | measurement | 11 | r/min | 11 | r/min | |
| Straight Blade Width | measurement | 78 | in | 1980 | mm | |
| Angle Blade Width | measurement | 78 | in | 1980 | mm | |
| Straight Blade Height | measurement | 15.4 | in | 390 | mm | |
| Angle Blade Height | measurement | 15.7 | in | 400 | mm | |
| Top Guard | text | ISO 10262:1998 (Level II) | ||||
| Roll Over Protective Structure (ROPS) | text | ISO 12117-2:2008 | ||||
| Tip Over Protective Structure (TOPS) | text | ISO 12117:1997 | ||||
| Operator Sound Pressure (ISO 6396:2008) | measurement | 72 | dB(A) | 72 | dB(A) | |
| Average Exterior Sound Pressure (ISO 6395:2008) | measurement | 99 | dB(A) | 99 | dB(A) | |
| Note | text | European Union Directive “2000/14/EC” | ||||
| Track Belt/Shoe Width | measurement | 16 | in | 400 | mm | |
| Maximum Reach | measurement | 248 | in | 6295 | mm | |
| Stick Length | measurement | 62 | in | 1580 | mm | |
| Vertical Wall | measurement | 107 | in | 2710 | mm | |
| Swing Bearing - Height | measurement | 27 | in | 672 | mm | |
| Maximum Reach - Ground Level | measurement | 241 | in | 6130 | mm | |
| Maximum Blade Height | measurement | 16 | in | 415 | mm | |
| Ground Clearance | measurement | 12 | in | 306 | mm | |
| Boom In Reach | measurement | 98 | in | 2485 | mm | |
| Boom Swing - Right | measurement | 36 | in | 910 | mm | |
| Transport Height | measurement | 69 | in | 1755 | mm | |
| Tail Swing with Counterweight | measurement | 58 | in | 1475 | mm | |
| Cab Height | measurement | 100 | in | 2545 | mm | |
| Width over Upper House | measurement | 77 | in | 1950 | mm | |
| Maximum Dump Clearance | measurement | 170 | in | 4325 | mm | |
| Tail Swing without Counterweight | measurement | 53 | in | 1350 | mm | |
| Boom Swing - Left | measurement | 29 | in | 735 | mm | |
| O/A Undercarriage Length | measurement | 102 | in | 2580 | mm | |
| Maximum Dig Height | measurement | 230 | in | 5835 | mm | |
| Maximum Blade Depth | measurement | 24 | in | 600 | mm | |
| O/A Track Width | measurement | 78 | in | 1980 | mm | |
| Dig Depth | measurement | 146 | in | 3710 | mm | |
| O/A Shipping Length | measurement | 235 | in | 5975 | mm | |
| Dig Depth | measurement | 162 | in | 4110 | mm | |
| Maximum Blade Height | measurement | 16 | in | 415 | mm | |
| O/A Track Width | measurement | 78 | in | 1980 | mm | |
| Track Belt/Shoe Width | measurement | 16 | in | 400 | mm | |
| Tail Swing with Counterweight | measurement | 58 | in | 1475 | mm | |
| Vertical Wall | measurement | 125 | in | 3165 | mm | |
| Boom In Reach | measurement | 117 | in | 2960 | mm | |
| Maximum Blade Depth | measurement | 24 | in | 600 | mm | |
| Maximum Dig Height | measurement | 241 | in | 6130 | mm | |
| Transport Height | measurement | 95 | in | 2410 | mm | |
| Stick Length | measurement | 78 | in | 1980 | mm | |
| Ground Clearance | measurement | 12 | in | 306 | mm | |
| Swing Bearing - Height | measurement | 27 | in | 672 | mm | |
| Width over Upper House | measurement | 77 | in | 1950 | mm | |
| O/A Undercarriage Length | measurement | 102 | in | 2580 | mm | |
| O/A Shipping Length | measurement | 234 | in | 5950 | mm | |
| Cab Height | measurement | 100 | in | 2545 | mm | |
| Maximum Reach | measurement | 263 | in | 6685 | mm | |
| Boom Swing - Left | measurement | 29 | in | 735 | mm | |
| Tail Swing without Counterweight | measurement | 53 | in | 1350 | mm | |
| Boom Swing - Right | measurement | 36 | in | 910 | mm | |
| Maximum Dump Clearance | measurement | 182 | in | 4610 | mm | |
| Maximum Reach - Ground Level | measurement | 257 | in | 6535 | mm | |
| Air Conditioning | text | 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. | ||||
| Recyclability | text | 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