New CAT Equipment

304 Mini Excavator

Mini Excavators Inspired by Our Customers

The Cat® 304 Mini Excavator delivers power and performance in a compact size to help you work in a wide range of applications.

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    Benefits

    4 Industry First Features

    Cat Exclusives in a Mini Excavator

    Up to 10% Lower Total Ownership Costs

    with extended service intervals, lower repair costs and easy service access

    Up to 20% More Performance

    in lifting, digging and multi-function capability

    Learn more about the 304 Mini Excavator

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    • Blade
      Angle Blade - Left
      25 Degrees
      Angle Blade - Right
      25 Degrees
      Angle Blade Height
      14.2 in
      Angle Blade Width
      66.9 in
      Straight Blade Height
      14.2 in
      Straight Blade Width
      66.9 in
    • Certification - Cab and Canopy
      Roll Over Protective Structure (ROPS)
      ISO 12117-2:2008
      Tip Over Protective Structure (TOPS)
      ISO 12117:1997
      Top Guard
      ISO 10262:1998 (Level I)
    • Dimensions - Long Stick
      Boom Height - Shipping Position
      75.2 in
      Boom In Reach
      92.1 in
      Boom Swing - Left
      20.9 in
      Boom Swing - Right
      28.7 in
      Dig Depth
      138.2 in
      Ground Clearance
      12 in
      Maximum Blade Depth
      18.7 in
      Maximum Blade Height
      16.5 in
      Maximum Dig Height
      201.8 in
      Maximum Dump Clearance
      147.2 in
      Maximum Reach
      219.3 in
      Maximum Reach - Ground Level
      214.4 in
      Note
      *Overall Shipping Length depends on blade position during shipment.
      O/A Shipping Height
      100 in
      O/A Undercarriage Length
      87 in
      Overall Shipping Length*
      194.9 in
      Stick Length
      66.7 in
      Swing Bearing - Height
      21.9 in
      Tail Swing with Counterweight
      51.2 in
      Tail Swing without Counterweight
      47.4 in
      Track Belt/Shoe Width
      13.8 in
      Track Width
      66.9 in
      Vertical Wall
      99.8 in
    • Dimensions - Standard Stick
      Boom Height - Shipping Position
      63.8 in
      Boom In Reach
      88.8 in
      Boom Swing - Left
      20.9 in
      Boom Swing - Right
      28.7 in
      Dig Depth
      126.4 in
      Ground Clearance
      12 in
      Maximum Blade Depth
      18.7 in
      Maximum Blade Height
      16.5 in
      Maximum Dig Height
      198.4 in
      Maximum Dump Clearance
      143.5 in
      Maximum Reach
      209.8 in
      Maximum Reach - Ground Level
      204.7 in
      Note
      *Overall Shipping Length depends on blade position during shipment.
      O/A Shipping Height
      100 in
      O/A Undercarriage Length
      87 in
      Overall Shipping Length*
      194.9 in
      Stick Length
      54.9 in
      Swing Bearing - Height
      21.9 in
      Tail Swing with Counterweight
      51.2 in
      Tail Swing without Counterweight
      47.4 in
      Track Belt/Shoe Width
      13.8 in
      Vertical Wall
      94.3 in
    • Engine
      Bore
      3.3 in
      Displacement
      101 in³
      Emissions
      Meets U.S. EPA Tier 4 Final and EU Stage V emission standards.
      Engine Model
      C1.7 Turbo
      Gross Power - 2,400 rpm - SAE J1995:2014
      48.4 HP
      Net Power
      45 HP
      Net Power - 2,400 rpm - ISO 9249, 80/1269/EEC
      45 HP
      Note
      Net power advertised is the power available at the flywheel when the engine is at rated speed and rated power when the engine is installed with the factory configured fan, air intake system, exhaust system, and alternator with a minimum alternator load.
      Stroke
      3.9 in
    • Hydraulic System
      Auxiliary Circuit - Primary - Flow
      21 gal/min
      Auxiliary Circuit - Primary - Pressure
      3553 psi
      Auxiliary Circuit - Secondary - Flow
      7 gal/min
      Auxiliary Circuit - Secondary - Pressure
      3553 psi
      Digging Force - Bucket
      8588 lbf
      Digging Force - Stick - Long
      4316 lbf
      Digging Force - Stick - Standard
      4721 lbf
      Note
      Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
      Operating Pressure - Equipment
      3553 psi
      Operating Pressure - Swing
      2611 psi
      Operating Pressure - Travel
      3553 psi
      Pump Flow at 2,400 rpm
      25 gal/min
      Type
      Load Sensing Hydraulics with Variable Displacement Piston Pump
    • Service Refill Capacities
      Cooling System
      2.9 l
      Engine Oil
      1.6 gal (US)
      Fuel Tank
      17 gal (US)
      Hydraulic System
      17 gal (US)
      Hydraulic Tank
      14 gal (US)
    • Sound
      Average Exterior Sound Pressure (ISO 6395:2008)
      97 dB(A)
      Note
      European Union Directive “2000/14/EC”
      Operator Sound Pressure (ISO 6396:2008)
      76 dB(A)
    • Sustainability
      Recyclability
      96%
    • Swing System
      Boom Swing - Left
      78 Degrees
      Boom Swing - Right
      50 Degrees
      Machine Swing Speed
      9 r/min
    • Travel System
      Gradeability - Maximum
      30 degrees
      Ground Pressure - Maximum Weight
      4.9 psi
      Ground Pressure - Minimum Weight
      4.2 psi
      Maximum Traction Force - High Speed
      4271 lbf
      Maximum Traction Force - Low Speed
      7329 lbf
      Travel Speed - High
      3.2 mile/h
      Travel Speed - Low
      2.2 mile/h
    • Weight Increase from Minimum Configuration
      Angle Blade
      243 lb
      Counterweight
      496 lb
      Long Stick
      66 lb
      Steel Tracks
      430 lb
    • Weights
      Maximum Operating Weight with Cab**
      9867 lb
      Maximum Operating Weight with Canopy**
      9647 lb
      Minimum Operating Weight with Cab*
      8875 lb
      Minimum Operating Weight with Canopy*
      8655 lb
      Note (1)
      *Minimum Weight is based on rubber tracks, operator, full fuel tank, standard stick, straight blade, no bucket and no extra counterweight.
      Note (2)
      **Maximum Weight is based on steel tracks, operator, full fuel tank, long stick, straight blade, extra counterweight and no bucket.
      Operating Weight
      9867 lb
    ENGINE
    • Cat® C1.7 Turbo Engine (U.S. EPA Tier 4 Final/EU Stage V)
    • Automatic Engine Idle
    • Automatic Engine Shutdown
    • Automatic Two Speed Travel
    • Fuel Water Separator
    • Power on Demand (not available in all regions)
    • Variable Displacement Piston Pump
    • Load Sensing/Flow Sharing Hydraulics
    HYDRAULICS
    • Smart Tech Electronic Pump
    • Accumulator
    • Automatic Swing Brake
    • Auxiliary Hydraulic Lines
    • One and Two Way Auxiliary Flow
    • Continuous Auxiliary Flow
    • Auxiliary Line Quick Disconnects
    OPERATOR ENVIRONMENT
    • Canopy or Cab (Canopy not available in some regions)
    • Top Guard ISO 10262:1998 Level I
    • ROPS – ISO 12117-2:2008
    • TOPS – ISO 12117:1997
    • Stick Steer Mode
    • Travel Cruise Control
    • Control Pattern Changer (optional in some regions)
    • Adjustable Wrist Rests
    • Washable Floor Mat
    • Travel Pedals and Hand Levers
    • Machine Security – Standard Key with Pass Code
    • Fabric Suspension Seat (Cab only)
    • Vinyl Suspension Seat (Canopy only)
    • Hydraulic Lockout – All Controls
    • Retractable High Visibility Seat Belt (75 mm/3 in)
    • Coat Hook
    • Cup Holder
    • Storage Pocket
    • Skylight
    • Mounting Bosses for Front
    • Signaling/Warning Horn
    • Interior Light (Cab only)
    • Boom Light, Halogen (not available in all regions)
    • 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
      – Hour Meter with Wake Up Switch
      – Jog Dial (cab only)
    UNDERCARRIAGE
    • Rubber Belt (350 mm/13.8 in)
    • Dozer Straight Blade
    • Dozer Blade Float
    • Tie Downs on Track Frame
    BOOM, STICK AND LINKAGES
    • One Piece Boom (2500 mm/98.4 in)
    • Standard Stick (1395 mm/54.9 in)
    • Front Shovel Capable – Pin-On
    • Thumb Ready
    • Certified Lifting Eye
    ELECTRICAL
    • 12 Volt Battery
    • Software (machine and monitor)
    • Maintenance Free Battery
    • Battery Disconnect
    • 12 Volt Power Socket
    • Travel Alarm (optional in some regions)
    OTHER
    • Counterweight (225 kg/496 lb)
    OPERATOR ENVIRONMENT
    • Cab with Air Conditioning
    • Cab with Heater
    • No Travel Pedals and Hand Levers (optional in some regions)
    • Machine Security – Push to Start with Key Fob/Pass Code
    • LED Front Lights
    • LED Front and Rear Lights
    • LED Boom Light
    • Mirrors, Left, Right and Rear
    • Camera
    • Radio – Bluetooth®, Auxiliary, Microphone, USB (charging only) (Cab only)
    • Next Generation Advanced Monitor
      – Touch Screen
      – Site Reference System
      – High Definition Camera Capable (IP68 and IP69K)
      – Numeric Security Code
    UNDERCARRIAGE
    • Steel Track (350 mm/13.8 in)
    • Steel Track with Rubber Pads
    • Angle Blade
    BOOM, STICK AND LINKAGES
    • Long Stick (1695 mm/66.7 in)
    • Front Shovel Capable – Dual Lock Manual Coupler
    • Front Shovel Capable – Hydraulic Coupler
    • Attachments including Couplers, Thumbs, Buckets, Augers and Hammers
    • 2nd Auxiliary Hydraulic Lines
    • Bucket Divert Lines
    • Boom Lowering Check Valve
    • Stick Lowering Check Valve
    • Hydraulic Quick Coupler Lines
    ELECTRICAL
    • Product Link™ PL243 (regulations apply)
    • Product Link PLE643 (regulations apply)
    GUARDING
    • Polycarbonate Half Height Front Guard (Canopy only)
    • Polycarbonate Front Guard (ISO 10262:1998 Level I and EN356 P5A)
    • Heavy Duty Front Guard ISO 10262:1998 Level II
    • Heavy Duty Top Guard 10262:1998 Level II (Cab only)
    OTHER
    • Bio Oil Capable
    • Eco Drain
    • Water Jacket Heater

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