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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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Engine Model Cat C2.4 Turbo
Net Power 55.9 HP
Gross Power - ISO 14396 57.9 HP
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
Operating Weight 15766 lb
Minimum Operating Weight with Canopy* 14134 lb
Maximum Operating Weight with Canopy** 15633 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** 15766 lb
Minimum Operating Weight with Cab* 14266 lb
Note (1) *Minimum Weight is based on rubber tracks, operator, full fuel tank, standard stick, fixed blade and no bucket.
Counterweight 551 lb
Long Stick 97 lb
Steel Tracks with Pads 827 lb
Angle Blade 225 lb
XTC Carriage (no tool) 141 lb
Ground Pressure - Minimum Weight 5.1 psi
Ground Pressure - Maximum Weight 5.7 psi
Gradeability - Maximum 30 degrees
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
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)
Operating Pressure - Travel 3553 psi
Auxiliary Circuit - Primary - Flow 24 gal/min
Digging Force - Bucket 11578 lbf
Auxiliary Circuit - Primary - Pressure 3553 psi
Type Load Sensing Hydraulics with Variable Displacement Piston Pump
Auxiliary Circuit - Secondary - Flow 9 gal/min
Operating Pressure - Equipment 3553 psi
Auxiliary Circuit - Secondary - Pressure 3553 psi
Digging Force - Stick - Standard 6632 lbf
Operating Pressure - Swing 3263 psi
Digging Force - Stick - Long 5957 lbf
Pump Flow at 2,400 rpm 40 gal/min
Boom Swing - Right 65 degrees
Boom Swing - Left 60 degrees
Machine Swing Speed 11 r/min
Straight Blade Width 78 in
Angle Blade Width 78 in
Straight Blade Height 15.4 in
Angle Blade Height 15.7 in
Top Guard ISO 10262:1998 (Level II)
Roll Over Protective Structure (ROPS) ISO 12117-2:2008
Tip Over Protective Structure (TOPS) ISO 12117:1997
Operator Sound Pressure (ISO 6396:2008) 72 dB(A)
Average Exterior Sound Pressure (ISO 6395:2008) 99 dB(A)
Note European Union Directive “2000/14/EC”
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
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
Dig Depth 162 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
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.
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
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