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306 CR Mini Hydraulic Excavator

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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Net Power55.9HP




Engine ModelCat C2.4 Turbo

Net Power @ 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/126955.9HP

Gross Power - ISO 1439657.9HP

Operating Weight15766lb

Minimum Operating Weight with Canopy*14134lb

Maximum Operating Weight with Canopy**15633lb

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**15766lb

Minimum Operating Weight with Cab*14266lb

Note (1)*Minimum Weight is based on rubber tracks, operator, full fuel tank, standard stick, fixed blade and no bucket.

Dig Depth162in

Maximum Blade Height16in

O/A Track Width78in

Track Belt/Shoe Width16in

Tail Swing with Counterweight58in

Vertical Wall125in

Boom In Reach117in

Maximum Blade Depth24in

Maximum Dig Height241in

Transport Height95in

Stick Length78in

Ground Clearance12in

Swing Bearing - Height27in

Width over Upper House77in

O/A Undercarriage Length102in

O/A Shipping Length234in

Cab Height100in

Maximum Reach263in

Boom Swing - Left29in

Tail Swing without Counterweight53in

Boom Swing - Right36in

Maximum Dump Clearance182in

Maximum Reach - Ground Level257in


Long Stick97lb

Steel Tracks with Pads827lb

Angle Blade225lb

XTC Carriage (no tool)141lb

Ground Pressure - Minimum Weight5.1psi

Ground Pressure - Maximum Weight5.7psi

Gradeability - Maximum30 degrees

Maximum Traction Force - High Speed6969lbf

Maximum Traction Force - Low Speed12589lbf

Travel Speed - High3.1mile/h

Travel Speed - Low1.7mile/h

Cooling System2.6gal (US)

Hydraulic System27.5gal (US)

Hydraulic Tank14gal (US)

Engine Oil2.1gal (US)

Fuel Tank34.3gal (US)

Operating Pressure - Travel3553psi

Auxiliary Circuit - Primary - Flow24gal/min

Digging Force - Bucket11578lbf

Auxiliary Circuit - Primary - Pressure3553psi

TypeLoad Sensing Hydraulics with Variable Displacement Piston Pump

Auxiliary Circuit - Secondary - Flow9gal/min

Operating Pressure - Equipment3553psi

Auxiliary Circuit - Secondary - Pressure3553psi

Digging Force - Stick - Standard6632lbf

Operating Pressure - Swing3263psi

Digging Force - Stick - Long5957lbf

Pump Flow at 2,400 rpm40gal/min

Boom Swing - Right65 degrees

Boom Swing - Left60 degrees

Machine Swing Speed11r/min

Straight Blade Width78in

Angle Blade Width78in

Straight Blade Height15.4in

Angle Blade Height15.7in

Top GuardISO 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)72dB(A)

Average Exterior Sound Pressure (ISO 6395:2008)99dB(A)

NoteEuropean Union Directive “2000/14/EC”

Track Belt/Shoe Width16in

Maximum Reach248in

Stick Length62in

Vertical Wall107in

Swing Bearing - Height27in

Maximum Reach - Ground Level241in

Maximum Blade Height16in

Ground Clearance12in

Boom In Reach98in

Boom Swing - Right36in

Transport Height69in

Tail Swing with Counterweight58in

Cab Height100in

Width over Upper House77in

Maximum Dump Clearance170in

Tail Swing without Counterweight53in

Boom Swing - Left29in

O/A Undercarriage Length102in

Maximum Dig Height230in

Maximum Blade Depth24in

O/A Track Width78in

Dig Depth146in

O/A Shipping Length235in

Air ConditioningThe 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.



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


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 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)


Jog dial interface


Cab Heat Only

Air Suspension Heated Seat


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


Angle Blade

Extra Tool Carrier (XTC)

Steel Tracks (450 mm/17.7 in wide)

Steel Track with Rubber Pads


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


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


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


Product Link Elite (regulations apply)


Rotating Beacon


Locks on External Enclosure Doors

Lockable Fuel Cap

Beacon Socket

Rear Reflectors


Additional Counterweight

Water Jacket Heater

Refueling Pump


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

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