304 Mini Excavator

Mini Excavators 304

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Key Specs

Net Power
45 hp
33.6 kW
Operating Weight
9867 lb
4475 kg
Dig Depth
138.2 in
3510 mm

Overview

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.

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

Product Specifications for 304

Operating Weight 9867 lb 4475 kg
Minimum Operating Weight with Canopy* 8655 lb 3925 kg
Maximum Operating Weight with Canopy** 9647 lb 4375 kg
Minimum Operating Weight with Cab* 8875 lb 4025 kg
Maximum Operating Weight with Cab** 9867 lb 4475 kg
Note (1) *Minimum Weight is based on rubber tracks, operator, full fuel tank, standard stick, straight blade, no bucket and no extra counterweight. *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. **Maximum Weight is based on steel tracks, operator, full fuel tank, long stick, straight blade, extra counterweight and no bucket.
Dig Depth 138.2 in 3510 mm
Vertical Wall 99.8 in 2535 mm
Maximum Reach - Ground Level 214.4 in 5445 mm
Maximum Reach 219.3 in 5570 mm
Maximum Dig Height 201.8 in 5125 mm
Maximum Dump Clearance 147.2 in 3740 mm
Boom In Reach 92.1 in 2340 mm
Tail Swing without Counterweight 47.4 in 1205 mm
Tail Swing with Counterweight 51.2 in 1300 mm
Maximum Blade Height 16.5 in 420 mm
Maximum Blade Depth 18.7 in 475 mm
Boom Height - Shipping Position 75.2 in 1910 mm
O/A Shipping Height 100 in 2540 mm
Swing Bearing - Height 21.9 in 557 mm
O/A Undercarriage Length 87 in 2210 mm
Overall Shipping Length* 194.9 in 4950 mm
Boom Swing - Right 28.7 in 730 mm
Boom Swing - Left 20.9 in 530 mm
Track Belt/Shoe Width 13.8 in 350 mm
Track Width 66.9 in 1700 mm
Ground Clearance 12 in 305 mm
Stick Length 66.7 in 1695 mm
Note *Overall Shipping Length depends on blade position during shipment. *Overall Shipping Length depends on blade position during shipment.
Counterweight 496 lb 225 kg
Long Stick 66 lb 30 kg
Steel Tracks 430 lb 195 kg
Angle Blade 243 lb 110 kg
Dig Depth 126.4 in 3210 mm
Vertical Wall 94.3 in 2395 mm
Maximum Reach - Ground Level 204.7 in 5200 mm
Maximum Reach 209.8 in 5330 mm
Maximum Dig Height 198.4 in 5040 mm
Maximum Dump Clearance 143.5 in 3645 mm
Boom In Reach 88.8 in 2255 mm
Tail Swing without Counterweight 47.4 in 1205 mm
Tail Swing with Counterweight 51.2 in 1300 mm
Maximum Blade Height 16.5 in 420 mm
Maximum Blade Depth 18.7 in 475 mm
Boom Height - Shipping Position 63.8 in 1620 mm
O/A Shipping Height 100 in 2540 mm
Swing Bearing - Height 21.9 in 557 mm
O/A Undercarriage Length 87 in 2210 mm
Overall Shipping Length* 194.9 in 4950 mm
Boom Swing - Right 28.7 in 730 mm
Boom Swing - Left 20.9 in 530 mm
Track Belt/Shoe Width 13.8 in 350 mm
Ground Clearance 12 in 305 mm
Stick Length 54.9 in 1395 mm
Note *Overall Shipping Length depends on blade position during shipment. *Overall Shipping Length depends on blade position during shipment.
Travel Speed - High 3.2 mile/h 5.2 km/h
Travel Speed - Low 2.2 mile/h 3.5 km/h
Maximum Traction Force - High Speed 4271 lbf 19 kN
Maximum Traction Force - Low Speed 7329 lbf 32.6 kN
Ground Pressure - Minimum Weight 4.2 psi 28.7 kPa
Ground Pressure - Maximum Weight 4.9 psi 33.8 kPa
Gradeability - Maximum 30 degrees 30 degrees
Cooling System 2.9 gal (US) 11 l
Engine Oil 1.6 gal (US) 6 l
Fuel Tank 17 gal (US) 63 l
Hydraulic Tank 14 gal (US) 52 l
Hydraulic System 17 gal (US) 65 l
Type Load Sensing Hydraulics with Variable Displacement Piston Pump Load Sensing Hydraulics with Variable Displacement Piston Pump
Pump Flow at 2,400 rpm 25 gpm 96 L/min
Operating Pressure - Equipment 3553 psi 245 bar
Operating Pressure - Travel 3553 psi 245 bar
Operating Pressure - Swing 2611 psi 180 bar
Auxiliary Circuit - Primary - Flow 21 gpm 65 L/min
Auxiliary Circuit - Primary - Pressure 3553 psi 245 bar
Auxiliary Circuit - Secondary - Flow 7 gpm 28 L/min
Auxiliary Circuit - Secondary - Pressure 3553 psi 245 bar
Digging Force - Stick - Standard 4721 lbf 21 kN
Digging Force - Stick - Long 4316 lbf 19.2 kN
Digging Force - Bucket 8588 lbf 38.2 kN
Note Flow and pressure are not combinable. Under load, as flow rises pressure goes down. Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Machine Swing Speed 9 r/min 9 r/min
Boom Swing - Left 78 Degrees 78 Degrees
Boom Swing - Right 50 Degrees 50 Degrees
Straight Blade Width 66.9 in 1700 mm
Straight Blade Height 14.2 in 360 mm
Angle Blade Width 66.9 in 1700 mm
Angle Blade Height 14.2 in 360 mm
Angle Blade - Left 25 Degrees 25 Degrees
Angle Blade - Right 25 Degrees 25 Degrees
Roll Over Protective Structure (ROPS) ISO 12117-2:2008 ISO 12117-2:2008
Top Guard ISO 10262:1998 (Level I) ISO 10262:1998 (Level I)
Air Conditioning The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a or R1234yf (Europe) (Global Warming Potential = 1430). See label or instruction manual for gas refrigerant identification. The system contains 0.75 kg (1.65 lb), 0.90 kg (1.98 lb) or 1 kg (2.20 lb) of refrigerant which has a CO2 equivalent of 1.430 metric tonnes (1.576 tons) for R134a and 0.001 tonnes (0.001 tons) for R1234yf (Europe). The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a or R1234yf (Europe) (Global Warming Potential = 1430). See label or instruction manual for gas refrigerant identification. The system contains 0.75 kg (1.65 lb), 0.90 kg (1.98 lb) or 1 kg (2.20 lb) of refrigerant which has a CO2 equivalent of 1.430 metric tonnes (1.576 tons) for R134a and 0.001 tonnes (0.001 tons) for R1234yf (Europe).
Operator Sound Pressure (ISO 6396:2008) 76 dB(A) 76 dB(A)
Average Exterior Sound Pressure (ISO 6395:2008) 97 dB(A) 97 dB(A)
Note European Union Directive “2000/14/EC” European Union Directive “2000/14/EC”
Recyclability 96% 96%
Net Power 45 hp 33.6 kW
Engine Model C1.7 Turbo C1.7 Turbo
Net Power - 2,400 rpm - ISO 9249, 80/1269/EEC 45 hp 33.6 kW
Gross Power - ISO 14396 48.4 hp 36.1 kW
Bore 3.3 in 84 mm
Stroke 3.9 in 100 mm
Displacement 101 in³ 1.662 l
Emissions Meets U.S. EPA Tier 4 Final and EU Stage V emission standards. Meets U.S. EPA Tier 4 Final and EU Stage V emission standards.
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. 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.

304 Standard Equipment

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)
  • 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
  • Hydraulic Quick Coupler Lines

ELECTRICAL

  • 12 Volt Battery
  • Software (machine and monitor)
  • Maintenance Free Battery
  • Lock Out/Tag Out Battery Disconnect
  • 12 Volt Power Socket
  • Product Link™ Elite
  • Travel Alarm (optional in some regions)

GUARDING

  • ROPS – ISO 12117-2:2008
  • Top Guard ISO 10262:1998 Level I

OTHER

  • Eco Drain

304 Optional Equipment

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
  • Seat Belt Reminder System
  • LED Front and Rear Lights
  • 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)
  • 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 (Europe Standard)
  • Stick Lowering Check Valve (Europe Standard)

ELECTRICAL

  • Cat Grade Advanced 2D
  • Cat Grade 3D

GUARDING

  • Top Guard ISO 10262:1998 (Level II)
  • Front Guard (Mesh) ISO 10262:1998 (Level I)
  • Front Guard (Heavy Duty) ISO 10262:1998 Level (II)

OTHER

  • Bio Oil Capable
  • Water Jacket Heater
  • Counterweight (225 kg/496 lb)

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304 Mini Hydraulic Excavator

304 Mini Hydraulic Excavator

304 Mini Hydraulic Excavator

304 Mini Hydraulic Excavator

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304 Mini Hydraulic Excavator
304 Mini Hydraulic Excavator
304 Mini Hydraulic Excavator
304 Mini Hydraulic Excavator
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