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306 CR Mini Hydraulic Excavator

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Overview

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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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.

Dimensions - Standard Stick

Vertical Wall: 107in
Stick Length: 62in
Maximum Reach: 248in
Track Belt/Shoe Width: 16in
O/A Shipping Length: 235in
O/A Track Width: 78in
Dig Depth: 146in
Maximum Blade Depth: 24in
Swing Bearing - Height: 27in
Maximum Reach - Ground Level: 241in
Maximum Blade Height: 16in
Ground Clearance: 12in
Boom In Reach: 98in
Boom Swing - Right: 36in
Transport Height: 69in
Tail Swing with Counterweight: 58in
Cab Height: 100in
Width over Upper House: 77in
Maximum Dump Clearance: 170in
Tail Swing without Counterweight: 53in
Boom Swing - Left: 29in
O/A Undercarriage Length: 102in
Maximum Dig Height: 230in

Sound

Note: European Union Directive “2000/14/EC”
Average Exterior Sound Pressure (ISO 6395:2008): 99dB(A)
Operator Sound Pressure (ISO 6396:2008): 72dB(A)

Certification - Cab

Tip Over Protective Structure (TOPS): ISO 12117:1997
Roll Over Protective Structure (ROPS): ISO 12117-2:2008
Top Guard: ISO 10262:1998 (Level II)

Blade

Angle Blade Height: 15.7in
Straight Blade Height: 15.4in
Angle Blade Width: 78in
Straight Blade Width: 78in

Swing System

Machine Swing Speed: 11r/min
Boom Swing - Left: 60 degrees
Boom Swing - Right: 65 degrees

Hydraulic System

Pump Flow at 2,400 rpm: 40gal/min
Digging Force - Stick - Long: 5957lbf
Operating Pressure - Swing: 3263psi
Digging Force - Stick - Standard: 6632lbf
Auxiliary Circuit - Secondary - Pressure: 3553psi
Operating Pressure - Equipment: 3553psi
Auxiliary Circuit - Secondary - Flow: 9gal/min
Type: Load Sensing Hydraulics with Variable Displacement Piston Pump
Auxiliary Circuit - Primary - Pressure: 3553psi
Digging Force - Bucket: 11578lbf
Auxiliary Circuit - Primary - Flow: 24gal/min
Operating Pressure - Travel: 3553psi

Service Refill Capacities

Fuel Tank: 34.3gal (US)
Engine Oil: 2.1gal (US)
Hydraulic Tank: 14gal (US)
Hydraulic System: 27.5gal (US)
Cooling System: 2.6gal (US)

Travel System

Travel Speed - Low: 1.7mile/h
Travel Speed - High: 3.1mile/h
Maximum Traction Force - Low Speed: 12589lbf
Maximum Traction Force - High Speed: 6969lbf
Gradeability - Maximum: 30 degrees
Ground Pressure - Maximum Weight: 5.7psi
Ground Pressure - Minimum Weight: 5.1psi

Weight Increase from Minimum Configuration

XTC Carriage (no tool): 141lb
Angle Blade: 225lb
Steel Tracks with Pads: 827lb
Long Stick: 97lb
Counterweight: 551lb

Weights

Note (1): *Minimum Weight is based on rubber tracks, operator, full fuel tank, standard stick, fixed blade and no bucket.
Minimum Operating Weight with Cab*: 14266lb
Maximum Operating Weight with Cab**: 15766lb
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 Canopy**: 15633lb
Operating Weight: 15766lb
Minimum Operating Weight with Canopy*: 14134lb

Engine

Net Power @ 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269: 55.9hp
Stroke: 4in
Displacement: 148in³
Bore: 3.4in
Gross Power - ISO 14396: 57.9hp
Engine Model: Cat C2.4 Turbo
Net Power: 55.9hp

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.

Dimensions - Long Stick

Maximum Reach - Ground Level: 257in
Maximum Dump Clearance: 182in
Boom Swing - Right: 36in
Tail Swing without Counterweight: 53in
Boom Swing - Left: 29in
Maximum Reach: 263in
Cab Height: 100in
Dig Depth: 162in
O/A Shipping Length: 234in
O/A Undercarriage Length: 102in
Width over Upper House: 77in
Stick Length: 78in
Ground Clearance: 12in
Swing Bearing - Height: 27in
Maximum Dig Height: 241in
Transport Height: 95in
Boom In Reach: 117in
Maximum Blade Depth: 24in
Vertical Wall: 125in
Track Belt/Shoe Width: 16in
Tail Swing with Counterweight: 58in
O/A Track Width: 78in
Maximum Blade Height: 16in

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

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306 CR Mini Hydraulic Excavator