Cat Excavators:

304E2 CR Mini Hydraulic Excavator

Engine Model
Cat® C2.4
Net Power
40.2 hp
Operating Weight
8996 lb
Weight – Canopy, Standard Stick
8655 lb

The Cat® 304E2 CR Mini Hydraulic Excavator delivers efficient performance, durability and versatility in a compact design to help you work in a variety of applications.



Benefits & Features

Product Specs

  • Engine

  • Engine Model
    Cat® C2.4
    Net Power
    40.2hp
    Rated Net Power @ 2,200 rpm – ISO 9249/EEC 80/1269
    40.2hp
    Bore
    3.4in
    Stroke
    4in
    Displacement
    146in3
    Gross Power – ISO 14396
    41.8hp
    Emissions
    *Meets U.S. EPA Tier 4 Final/EU Stage IIIA emission standards.
  • Weights*

  • Operating Weight
    8996lb
    Weight – Canopy, Standard Stick
    8655lb
    Weight – Canopy, Long Stick
    8721lb
    Weight – Cab, Standard Stick
    8930lb
    Weight – Cab, Long Stick
    8996lb
    Note
    *Weight includes counterweight, rubber tracks, bucket, operator, full fuel and auxiliary lines.
  • Hydraulic System

  • Pump Flow at 2,200 rpm
    26.4gal/min
    Operating Pressure – Equipment
    3553psi
    Operating Pressure – Travel
    3553psi
    Operating Pressure – Swing
    3132psi
    Auxiliary Circuit – Primary (186 bar/2,734 psi)
    18.5gal/min
    Auxiliary Circuit – Secondary (174 bar/2,524 psi)
    6.6gal/min
    Digging Force – Stick (standard)
    4856lb
    Digging Force – Stick (long)
    4384lb
    Digging Force – Bucket
    8498lb
    Type
    Load Sensing Hydraulics with Variable Displacement Piston Pump
  • Swing System

  • Machine Swing Speed
    10rpm
    Boom Swing – Left (without stop)*
    70°
    Boom Swing – Left (with stop)*
    55°
    Boom Swing – Right
    50°
    Note
    *Automatic swing brake, spring applied, hydraulic release.
  • Blade

  • Width
    76.8in
    Height
    12.8in
    Dig Depth
    18.5in
    Lift Height
    15.7in
  • Service Refill Capacities

  • Cooling System
    1.5gal
    Engine Oil
    2.5gal
    Hydraulic Tank
    11.2gal
    Fuel Tank
    12.2gal
    Hydraulic System
    17.2gal
  • Travel System

  • Travel Speed – High
    3.2mph
    Travel Speed – Low
    2.1mph
    Maximum Traction Force – High Speed
    3799lb
    Maximum Traction Force – Low Speed
    6969lb
    Ground Pressure – Canopy
    4.1psi
    Ground Pressure – Cab
    4.3psi
    Gradeability (maximum)
    30°
  • Operating Specifications

  • Stick Length – Standard
    52in
    Stick Length – Long
    64in
    Machine Overhang
    0in
  • Cab

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

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

  • Number of Carrier Rollers
    1
    Number of Track Rollers
    4
    Track Roller Type
    Center Flange
  • Lift Capacities at Ground Level – Lift Point Radius: 3000 mm (118 in)

  • Blade Down – Front
    3462lb
    Blade Up – Front
    1808lb
    Blade Down – Side
    2007lb
    Blade Up – Side
    1808lb
  • Lift Capacities at Ground Level – Lift Point Radius: 4500 mm (177 in)

  • Blade Down – Front
    1896lb
    Blade Up – Front
    948lb
    Blade Down – Side
    1058lb
    Blade Up – Side
    948lb
  • Dimensions – Standard Stick

  • Dig Depth
    123in
    Vertical Wall
    95in
    Maximum Reach at Ground Level
    206in
    Maximum Reach
    211in
    Maximum Dig Height
    196in
    Maximum Dump Clearance
    141in
    Boom In Reach
    83in
    Tail Swing
    38in
    Maximum Blade Height
    16in
    Maximum Blade Depth
    19in
    Boom Height in Shipping Position
    58in
    O/A Shipping Height
    98in
    Swing Bearing Height
    22in
    O/A Undercarriage Length
    87in
    O/A Shipping Length
    190in
    Boom Swing Right
    29in
    Boom Swing Left
    26in
    Track Belt/Shoe Width
    14in
    O/A Track Width
    77in
  • Dimensions – Long Stick

  • Dig Depth
    135in
    Vertical Wall
    101in
    Maximum Reach at Ground Level
    215in
    Maximum Reach
    220in
    Maximum Dig Height
    200in
    Maximum Dump Clearance
    145in
    Boom In Reach
    87in
    Tail Swing
    38in
    Maximum Blade Height
    16in
    Maximum Blade Depth
    19in
    Boom Height in Shipping Position
    70in
    O/A Shipping Height
    98in
    Swing Bearing Height
    22in
    O/A Undercarriage Length
    87in
    O/A Shipping Length
    194in
    Boom Swing Right
    29in
    Boom Swing Left
    26in
    Track Belt/Shoe Width
    14in
    O/A Track Width
    77in

Equipment

  • 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
      • Multiple languages
    • 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, 350 mm (14 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
  • 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
  • Lights And Mirrors
    • 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:
      • Air conditioning
      • Heat
      • High back suspension seat
      • Interior light
      • Interlocking front window system
      • Radio
      • Windshield wiper
  • Undercarriage
    • Power angle blade
    • Track, double grouser (steel), 350 mm (14 in)
  • Front Linkage
    • 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
  • Technology
    • Product Link

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