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Mini Excavators

Caterpillar serves all regions of the world so we build many different configurations of hydraulic excavators. Your Cat® dealer has exact machine specifications available in your area to help you choose what will best meet your needs.

305E2 CR Mini Hydraulic Excavator

The Cat® 305E2 CR Mini Hydraulic Excavator delivers high performance, durability and versatility in a compact design to help you work in a variety of applications.

  • Specification Summary

  • Net Power 30 kW
  • Engine Model Cat® C2.4
  • Rated Net Power - 2,200 rpm - ISO 9249/EEC 80/1269 30 kW
  • Operating Weight 5185 kg
  • Product Brochure

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Product Details

Engine

Net Power 30 kW
Engine Model Cat® C2.4
Rated Net Power - 2,200 rpm - ISO 9249/EEC 80/1269 30 kW
Displacement 2.4 l
Stroke 102.4 mm
Bore 87 mm
Gross Power - ISO 14396 31.2 kW
Emissions Meets U.S. EPA Tier 4 Final/EU Stage IIIA emission standards.

Weights*

Operating Weight 5185 kg
Weight - Canopy, Standard Stick 4975 kg
Weight - Cab, Long Stick 5185 kg
Weight - Cab, Standard Stick 5140 kg
Weight - Canopy, Long Stick 5020 kg
Note *Weight includes counterweight, rubber tracks, bucket, operator, full fuel and auxiliary lines.

Travel System

Maximum Traction Force - High Speed 24.1 kN
Travel Speed - Low 2.8 km/h
Travel Speed - High 4.4 km/h
Maximum Traction Force - Low Speed 45.2 kN
Gradeability - Maximum 30°
Ground Pressure - Cab 30.5 kPa
Ground Pressure - Canopy 29.5 kPa

Hydraulic System

Digging Force - Stick - Standard 24.7 kN
Operating Pressure - Equipment 245 bar
Digging Force - Stick - Long 21.3 kN
Pump Flow at 2,400 rpm 150 l/min
Operating Pressure - Swing 216 bar
Auxiliary Circuit - Primary (186 bar/2,734 psi) 80 l/min
Operating Pressure - Travel 245 bar
Auxiliary Circuit - Secondary (174 bar/2,524 psi) 25 l/min
Type Load Sensing Hydraulics with Variable Displacement Piston Pump
Digging Force - Bucket 44.7 kN

Swing System

Machine Swing Speed 10 r/min
Boom Swing - Left - With Stop* 60°
Boom Swing - Right 50°
Boom Swing - Left - Without Stop* 80°
Note *Automatic swing brake, spring applied, hydraulic release.

Blade

Width 1980 mm
Height 375 mm
Dig Depth 555 mm
Lift Height 405 mm

Service Refill Capacities

Cooling System 10.5 l
Engine Oil 9.5 l
Hydraulic Tank 68.3 l
Fuel Tank 63 l
Hydraulic System 78 l

Dimensions - Long Stick

Dig Depth 3670 mm
O/A Track Width 1980 mm
Boom Height - Shipping Position 2150 mm
Maximum Blade Height 405 mm
O/A Shipping Height 2550 mm
Maximum Dump Clearance 3920 mm
Swing Bearing - Height 615 mm
O/A Undercarriage Length 2580 mm
Maximum Reach 5960 mm
Vertical Wall 2630 mm
Boom In Reach 2530 mm
O/A Shipping Length 5290 mm
Maximum Blade Depth 555 mm
Boom Swing - Left 695 mm
Tail Swing 1100 mm
Track Belt/Shoe Width 400 mm
Maximum Reach - Ground Level 5810 mm
Boom Swing - Right 785 mm
Maximum Dig Height 5440 mm

Dimensions - Standard Stick

O/A Shipping Height 2550 mm
Maximum Blade Depth 555 mm
Maximum Reach - Ground Level 5330 mm
Boom Swing - Right 785 mm
O/A Undercarriage Length 2580 mm
O/A Track Width 1980 mm
Maximum Blade Height 405 mm
Maximum Dump Clearance 3720 mm
O/A Shipping Length 5180 mm
Vertical Wall 2320 mm
Boom Height - Shipping Position 1750 mm
Boom In Reach 2350 mm
Swing Bearing - Height 615 mm
Tail Swing 1100 mm
Maximum Reach 5600 mm
Maximum Dig Height 5250 mm
Dig Depth 3280 mm
Boom Swing - Left 695 mm
Track Belt/Shoe Width 400 mm

Lift Capacities at Ground Level - Lift Point Radius: 4000 mm (13'1”)

Blade Up - Front 760 kg
Blade Up - Side 570 kg
Blade Down - Side 640 kg
Blade Down - Front 1260 kg

Lift Capacities at Ground Level - Lift Point Radius: 3000 mm (9'8”)

Blade Down - Side 1200 kg
Blade Down - Front 2340 kg
Blade Up - Side 1070 kg
Blade Up - Front 1450 kg

Undercarriage

Track Roller Type Center Flange
Number of Carrier Rollers 1
Number of Track Rollers 4

Certification - Cab and Canopy

Top Guard ISO 10262 (Level I)
Roll Over Protective Structure (ROPS) ISO 12117-2
Tip Over Protective Structure (TOPS) ISO 12117

Cab

Note *European Union Directive “2000/14/EC”
Exterior Sound Power Level - ISO 6395:2008* 96 dB(A)
Dynamic Operator Sound Pressure Level (ISO 6396:2008) 81 dB(A)

Operating Specifications

Stick Length - Long 1750 mm
Stick Length - Standard 1350 mm

Air Conditioning System

Air Conditioning The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1.0 kg of refrigerant which has a CO2 equivalent of 1.4 metric tonnes.

QUALITY

The durable hoods and frame and the compact radius design of the 305E2 let you work comfortably and confidently in confined areas. The operator environment includes a high quality suspension seat, easy to adjust armrests and 100% pilot controls which offer consistent and long-lasting controllability.

EFFICIENCY

High Definition Hydraulic System provides a load sensing and flow sharing capability leading to operational precision, efficient performance and greater controllability. Power on Demand provides optimal efficiency and performance the moment you need it. This automatic system ensures fuel efficiency through appropriate engine rating to meet all operational needs as required.

VERSATILITY

Broad range of Cat Work Tools make the Cat Mini Excavator a versatile machine able to meet the requirements of any job site. Over 200 degrees of bucket rotation provides greater material retention during truck loading and easier flat wall digging without having to reposition the machine.

PERFORMANCE

Front shovel bucket orientation provides the operator with more ways to get the job done faster. COMPASS Control Panel is a standard feature that allows the operator to easily adjust auxiliary flows to achieve the optimal work tool performance, activate auto idle for improved fuel efficiency and utilize the security system to ensure protection of valuable assets with the simple touch of a button. The Site Reference System included in the COMPASS monitor provides output from pitch and roll sensors to aid in grading and level trenching. This impacts accuracy and productivity for job site finishing.

SERVICEABILITY

Convenient service and maintenance requirements include ease of access to daily check points, 500 hour engine oil and filter change period, 500 hour grease interval on front implement, S·O·SSM oil sampling valve and overall long term durability.

SAFETY

All Cat Mini Excavators from 3.5 metric tons to 8 metric tons are ROPS, TOPS and Top Guard Level 1 certified and include the Cat Interlock (hydraulic lockout) System, a certified accumulator which allows for auxiliary pressure to be released, making connecting and disconnecting work tools safer and easier, and a travel alarm. All of these safety features are standard on the E2 model lineup (travel alarm optional in Europe).
  • ENGINE
    •  Cat C2.4 diesel engine (meets U.S. EPA Tier 4 Final emission standards for North America and EU Stage IIIA/Tier 4 Interim emission standards for all other regions)
    •  Automatic engine idle
    •  Automatic engine shut-off
    •  Automatic two speed travel
    •  Diesel Particulate Filter (North America only)
    •  Diesel Oxidation Catalyst (North America only)
    •  Fuel and water separator
    •  Power on demand
  • HYDRAULIC SYSTEM
    •  1-way and 2-way (combined function)
    •  Accumulator
    •  Automatic swing parking brake
    •  Auxiliary hydraulic lines
    •  Adjustable auxiliary relief
    •  Auxiliary line quick disconnects
    •  Cat interlock system: hydraulic lockout
    •  Continuous auxiliary flow
    •  Ecology drain
    •  Hydraulic oil cooler
    •  High definition hydraulics
    •  Load sensing/flow sharing
  • OPERATOR ENVIRONMENT
    •  100% pilot control ergonomic joysticks
    •  Adjustable armrests
    •  COMPASS: complete, operation, maintenance, performance and security system<ul><li>Multiple languages</li></ul>
    •  Cup holder
    •  Hydraulic neutral lockout bar
    •  Literature holder
    •  Pattern changer (optional in Europe)
    •  Site reference system: leveling
    •  Tool storage area
    •  Travel control pedals with hand levers
    •  Washable floor mat
  • UNDERCARRIAGE
    •  Dozer blade with float function
    •  Track, rubber belt, 400 mm (16 in) width
    •  Tie down eyes on track frame
    •  Towing eye on base frame
  • Dozer blade with float function
    • Track, rubber belt, 400 mm (16 in) width
      • Tie down eyes on track frame
        • Towing eye on base frame
          • FRONT LINKAGE
            •  200 degree bucket rotation
            •  Certified lifting eye on bucket linkage (optional in Europe)
            •  Front shovel capable
            •  Thumb ready stick
          • 200 degree bucket rotation
            • Certified lifting eye on bucket linkage (optional in Europe)
              • Front shovel capable
                • Thumb ready stick
                  • ELECTRICAL
                    •  12 volt electrical system
                    •  60 ampere alternator
                    •  650 CCA maintenance free battery
                    •  Fuse box
                    •  Ignition key start/stop switch
                    •  Slow blow fuse
                    •  Warning horn
                  • 12 volt electrical system
                    • 60 ampere alternator
                      • 650 CCA maintenance free battery
                        • Fuse box
                          • Ignition key start/stop switch
                            • Slow blow fuse
                              • Warning horn
                                • LIGHTS AND MIRRORS
                                  •  Boom light with time delay capability
                                • Boom light with time delay capability
                                  • SAFETY AND SECURITY
                                    •  Anti-theft system (COMPASS)
                                    •  Caterpillar Corporate “One Key” System
                                    •  Door locks
                                    •  Lockable fuel cap
                                    •  Retractable seat belt
                                    •  Roll Over Protective Structure (ROPS) (ISO 12117-2)
                                    •  Tip Over Protective Structure (TOPS) (ISO 12117)
                                    •  Top guard – ISO 10262 (Level 1)
                                    •  Travel alarm (optional in Europe)
                                  • ENGINE
                                    •  Engine block heater
                                  • HYDRAULIC SYSTEM
                                    •  Quick coupler lines
                                    •  Boom lowering check valve
                                    •  Stick lowering check valve
                                    •  Secondary auxiliary hydraulic lines
                                  • OPERATOR ENVIRONMENT
                                    •  Cab:<ul><li>Air conditioning</li><li>Heat</li><li>High back suspension seat</li><li>Interior light</li><li>Interlocking front window system</li><li>Radio</li><li>Windshield
                                  • UNDERCARRIAGE
                                    •  Power angle blade
                                    •  Track, double grouser (steel), 400 mm (16 in)
                                    •  Track, double grouser (steel) with rubber pad, 400 mm (16 in)
                                  • Power angle blade
                                    • Track, double grouser (steel), 400 mm (16 in)
                                      • Track, double grouser (steel) with rubber pad, 400 mm (16 in)
                                        • FRONT LINKAGE
                                          •  Quick coupler: manual or hydraulic
                                          •  Thumb
                                          •  Buckets
                                          •  Full range of performance matched work tools<ul><li>Auger, hammer, ripper</li></ul>
                                        • Quick coupler: manual or hydraulic
                                          • Thumb
                                            • Buckets
                                              • Full range of performance matched work tools
                                                • Auger, hammer, ripper
                                                • LIGHTS AND MIRRORS
                                                  •  Light, cab with time delay capability
                                                  •  Mirror, canopy right
                                                  •  Mirror, canopy left
                                                  •  Mirror, cab rear
                                                • SAFETY AND SECURITY
                                                  •  Battery disconnect
                                                  •  Beacon socket
                                                  •  Front wire mesh guard
                                                  •  Rearview camera
                                                  •  Vandal guard
                                                • Battery disconnect
                                                  • Beacon socket
                                                    • Front wire mesh guard
                                                      • Rearview camera
                                                        • Vandal guard
                                                          • TECHNOLOGY
                                                            •  Product Link™

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