Mini Excavators 304

Request A Price Find Dealer

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

Net Power 45 HP 33.6 kW
Engine Model C1.7 Turbo C1.7 Turbo
Gross Power - 2,400 rpm - SAE J1995:2014 48.4 HP 36.1 kW
Bore 3.3 in 84 mm
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.
Stroke 3.9 in 100 mm
Displacement 101 in³ 1.662 l
Net Power - 2,400 rpm - ISO 9249, 80/1269/EEC 45 HP 33.6 kW
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.
Operating Weight 9867 lb 4475 kg
Minimum Operating Weight with Canopy* 8655 lb 3925 kg
Maximum Operating Weight with Canopy** 9647 lb 4375 kg
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.
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.
Maximum Operating Weight with Cab** 9867 lb 4475 kg
Minimum Operating Weight with Cab* 8875 lb 4025 kg
Steel Tracks 430 lb 195 kg
Counterweight 496 lb 225 kg
Angle Blade 243 lb 110 kg
Long Stick 66 lb 30 kg
Ground Pressure - Minimum Weight 4.2 psi 28.7 kPa
Maximum Traction Force - Low Speed 7329 lbf 32.6 kN
Travel Speed - Low 2.2 mile/h 3.5 km/h
Ground Pressure - Maximum Weight 4.9 psi 33.8 kPa
Travel Speed - High 3.2 mile/h 5.2 km/h
Maximum Traction Force - High Speed 4271 lbf 19 kN
Gradeability - Maximum 30 degrees 30 degrees
Cooling System 2.9 gal (US) 11 l
Engine Oil 1.6 gal (US) 6 l
Hydraulic System 17 gal (US) 65 l
Fuel Tank 17 gal (US) 63 l
Hydraulic Tank 14 gal (US) 52 l
Operating Pressure - Travel 3553 psi 245 bar
Auxiliary Circuit - Secondary - Pressure 3553 psi 245 bar
Digging Force - Stick - Long 4316 lbf 19.2 kN
Auxiliary Circuit - Secondary - Flow 7 gal/min 28 l/min
Pump Flow at 2,400 rpm 25 gal/min 96 l/min
Operating Pressure - Swing 2611 psi 180 bar
Auxiliary Circuit - Primary - Flow 21 gal/min 65 l/min
Auxiliary Circuit - Primary - Pressure 3553 psi 245 bar
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.
Type Load Sensing Hydraulics with Variable Displacement Piston Pump Load Sensing Hydraulics with Variable Displacement Piston Pump
Digging Force - Stick - Standard 4721 lbf 21 kN
Digging Force - Bucket 8588 lbf 38.2 kN
Operating Pressure - Equipment 3553 psi 245 bar
Boom Swing - Right 50 Degrees 50 Degrees
Machine Swing Speed 9 r/min 9 r/min
Boom Swing - Left 78 Degrees 78 Degrees
Angle Blade Height 14.2 in 360 mm
Straight Blade Height 14.2 in 360 mm
Straight Blade Width 66.9 in 1700 mm
Angle Blade Width 66.9 in 1700 mm
Angle Blade - Right 25 Degrees 25 Degrees
Angle Blade - Left 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)
Tip Over Protective Structure (TOPS) ISO 12117:1997 ISO 12117:1997
Average Exterior Sound Pressure (ISO 6395:2008) 97 dB(A) 97 dB(A)
Operator Sound Pressure (ISO 6396:2008) 76 dB(A) 76 dB(A)
Note European Union Directive “2000/14/EC” European Union Directive “2000/14/EC”
Maximum Reach - Ground Level 204.7 in 5200 mm
Vertical Wall 94.3 in 2395 mm
Note *Overall Shipping Length depends on blade position during shipment. *Overall Shipping Length depends on blade position during shipment.
Tail Swing with Counterweight 51.2 in 1300 mm
Boom In Reach 88.8 in 2255 mm
Dig Depth 126.4 in 3210 mm
Maximum Dig Height 198.4 in 5040 mm
Maximum Blade Height 16.5 in 420 mm
Swing Bearing - Height 21.9 in 557 mm
Boom Swing - Left 20.9 in 530 mm
Stick Length 54.9 in 1395 mm
O/A Undercarriage Length 87 in 2210 mm
Track Belt/Shoe Width 13.8 in 350 mm
Boom Height - Shipping Position 63.8 in 1620 mm
Boom Swing - Right 28.7 in 730 mm
Maximum Dump Clearance 143.5 in 3645 mm
Ground Clearance 12 in 305 mm
Maximum Reach 209.8 in 5330 mm
O/A Shipping Height 100 in 2540 mm
Tail Swing without Counterweight 47.4 in 1205 mm
Maximum Blade Depth 18.7 in 475 mm
Overall Shipping Length* 194.9 in 4950 mm
Dig Depth 138.2 in 3510 mm
Maximum Blade Depth 18.7 in 475 mm
O/A Shipping Height 100 in 2540 mm
Maximum Dump Clearance 147.2 in 3740 mm
Stick Length 66.7 in 1695 mm
Maximum Dig Height 201.8 in 5125 mm
Maximum Reach - Ground Level 214.4 in 5445 mm
Track Width 66.9 in 1700 mm
Tail Swing with Counterweight 51.2 in 1300 mm
Swing Bearing - Height 21.9 in 557 mm
Boom Height - Shipping Position 75.2 in 1910 mm
Boom Swing - Left 20.9 in 530 mm
Maximum Reach 219.3 in 5570 mm
Boom In Reach 92.1 in 2340 mm
Boom Swing - Right 28.7 in 730 mm
Track Belt/Shoe Width 13.8 in 350 mm
Vertical Wall 99.8 in 2535 mm
Maximum Blade Height 16.5 in 420 mm
Note *Overall Shipping Length depends on blade position during shipment. *Overall Shipping Length depends on blade position during shipment.
Overall Shipping Length* 194.9 in 4950 mm
Ground Clearance 12 in 305 mm
O/A Undercarriage Length 87 in 2210 mm
Tail Swing without Counterweight 47.4 in 1205 mm

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)
  • 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)

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
  • 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

See how 304 compares against frequently compared products.

Tools And Expert Help At Every Turn

Product Brochures and More Are Ready to Download!

Full specifications, product brochures and more. Sign up below for additional information. Or for instant access, you can skip this form.

Marketing Consent

Check out current offers for the 304

View More Offers
warning

Internet Explorer users may experience issues with certain features of our site.
Please try a current version of an alternate browser (i.e. Google Chrome, Microsoft Edge, Mozilla Firefox) for the full Cat.com experience.