306 CR Mini Hydraulic Excavator - Altorfer    

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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Engine

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

Weights

Operating Weight
15821lb
Minimum Operating Weight with Canopy*
14136lb
Maximum Operating Weight with Canopy**
15671lb
Note (2)
**Maximum Weight is based on steel tracks, extra counterweight, operator, full fuel tank, long stick, blade and bucket.
Maximum Operating Weight with Cab**
15821lb
Minimum Operating Weight with Cab*
14299lb
Note (1)
*Minimum Weight is based on rubber tracks, operator, full fuel tank, standard stick, blade and bucket.

Weight Increase from Minimum Configuration

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

Travel System

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

Service Refill Capacities

Cooling System
2.6gal (US)
Hydraulic System
19.8gal (US)
Hydraulic Tank
10.3gal (US)
Engine Oil
2.1gal (US)
Fuel Tank
34.3gal (US)

Hydraulic System

Operating Pressure - Travel
3553psi
Auxiliary Circuit - Primary - Flow
24gal/min
Digging Force - Bucket
11578lbf
Auxiliary Circuit - Primary - Pressure
3553psi
Type
Load Sensing Hydraulics with Variable Displacement Piston Pump
Auxiliary Circuit - Secondary - Flow
9gal/min
Operating Pressure - Equipment
3553psi
Auxiliary Circuit - Secondary - Pressure
3553psi
Digging Force - Stick - Standard
6632lbf
Operating Pressure - Swing
3046psi
Digging Force - Stick - Long
5957lbf
Pump Flow at 2,400 rpm
46gal/min

Swing System

Machine Swing Speed
11r/min

Blade

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

Certification - Cab

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

Sound

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

Dimensions - Standard Stick

Track Belt/Shoe Width
16in
Maximum Reach
248in
Stick Length
62in
Vertical Wall
107in
Swing Bearing - Height
26in
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
Maximum Blade Depth
24in
O/A Track Width
78in
Dig Depth
146in
O/A Shipping Length
235in

Dimensions - Long Stick

Dig Depth
162in
Maximum Blade Height
16in
O/A Track Width
78in
Track Belt/Shoe Width
16in
Tail Swing with Counterweight
58in
Vertical Wall
125in
Boom In Reach
117in
Maximum Blade Depth
24in
Maximum Dig Height
241in
Transport Height
95in
Stick Length
78in
Ground Clearance
12in
Swing Bearing - Height
26in
Width over Upper House
77in
O/A Undercarriage Length
102in
O/A Shipping Length
234in
Cab Height
100in
Maximum Reach
263in
Boom Swing - Left
29in
Tail Swing without Counterweight
53in
Boom Swing - Right
36in
Maximum Dump Clearance
181in
Maximum Reach - Ground Level
257in

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.

Standard Equipment

  • Engine
    • Cat C2.4T Diesel Engine (U.S. EPA Tier 4 Final/EU Stage V) – Electronic Engine, Turbo, Diesel Particulate Filter (DPF)
    • Automatic Engine Idle
    • Automatic Engine Shutdown
    • Automatic Swing Brake
    • Automatic Two Speed Travel
    • Fuel Water Separator with Indicator
    • Radial Seal – Double Element Air Filter
    • Side by Side Engine and Hydraulic Oil Cooler
    • Extended Life Coolant, –37° C (–35° F)
    • Ecology Drain
  • Hydraulics
    • Smart Tech Electronic Pump
    • Variable Displacement Piston Pump
    • Load Sensing/Flow Sharing Hydraulics
    • Power On Demand
    • Hydraulic Temperature Monitoring
    • Certified Accumulator
    • Hydro Advanced Hydraulic Oil
    • Auxiliary Hydraulic Lines:
      – 1 and 2-way (combined function)
    • Auxiliary Line Quick Disconnects
    • Adjustable Auxiliary Flow
    • Continuous Flow
    • Adjustable Auxiliary Relief
  • Operator Environment
    • Canopy or Sealed and Pressurized Cab
    • Operator Sound Pressure 72 dB(A) ISO 6396:2008
    • 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
    • ROPS – ISO 12117-2:2008
    • TOPS – ISO 12117:1997
    • Signaling/Warning Horn
    • Cab and (left side) Boom Work Lights
    • Utility Space for Mobile Phone
    • Color LCD Monitor
      – Fuel Level and Coolant Temperature Gauges
      – Maintenance and Machine Monitoring
      – Performance and Machine Adjustments
      – Numeric Security Code
      – Multiple Languages
      – Camera Ready
      – Hour Meter with Wake Up Switch
      – Jog Dial Control Interface
    • Cab Machines Only
      – 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®, USB, Auxiliary, Microphone
      – Skylight
  • 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)
    • Long Stick (1980 mm/78.0 in)
    • Front Shovel Capable (Pin-On/Manual Coupler/Hydraulic Coupler – not available in all regions)
    • Thumb Ready (not available in all regions)
    • Certified Lifting Eye (not available in all regions)
  • 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, not available in all regions)
    • Travel Alarm
  • Other
    • Locks on External Enclosure Doors
    • Lockable Fuel Cap
    • Beacon Socket
    • Rear Reflectors

Optional Equipment

  • Operator Environment
    • Cab (see Standard Equipment)
    • Next Generation Advanced Monitor
      – Touch Screen
      – Site Reference System
      – High Definition Camera Capable
    • Rain Visor
    • Air Suspension Heated Seat with Cab
    • Top Guard – ISO 10262:1998 (Level II)
  • Electrical
    • Product Link Elite (regulations apply, not available in all regions)
    • Rearview Camera
    • Rotating Beacon
  • Other
    • Attachments including Buckets, Augers and Hammers
    • Angle Blade
    • Extra Tool Carrier (XTC)
    • Steel Tracks (450 mm/17.7 in wide)
    • Steel Track with Rubber Pads
    • 2nd Auxiliary Hydraulic Lines
    • Additional Counterweight
    • Boom and Stick Hose Burst Check Valves
    • Bucket Linkage with Lift Eye
    • Track Guides
    • Water Jacket Heater
    • Refueling Pump
    • Cab Guarding