304 Mini Hydraulic Excavator

NEW | 2026 CAT 304-0AN406869

LISTING DETAILS

Model
304
Product Family
EXCAVATORS
Manufacturer
CAT
Year
2026
Serial Number
0AN406869
Location
RANCHO BERNARDO, CA
Unit Number
047326
Specs
  • Standard Equipment
  • Optional Equipment
  • Specs
  • Docs

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

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)

Specs

Overview

Long Name:
304 Mini Excavator
Name:
304
Brand:
Caterpillar
Status:
Current

Engine

Gross Power - ISO 14396
48.4 hp / 36.1 kW
Net Power
45 hp / 33.6 kW
Engine Model
C1.7 Turbo
Net Power - 2,400 rpm - ISO 9249, 80/1269/EEC
45 hp / 33.6 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.
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.

Weights

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.
Note (2)
**Maximum Weight is based on steel tracks, operator, full fuel tank, long stick, straight blade, extra counterweight and no bucket.

Weight Increase from Minimum Configuration

Counterweight
496 lb / 225 kg
Long Stick
66 lb / 30 kg
Steel Tracks
430 lb / 195 kg
Angle Blade
243 lb / 110 kg

Travel System

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

Service Refill Capacities

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

Hydraulic System

Type
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.

Swing System

Machine Swing Speed
9 r/min / 9 r/min
Boom Swing - Left
78 Degrees
Boom Swing - Right
50 Degrees

Blade

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
Angle Blade - Right
25 Degrees

Certification - Cab and Canopy

Roll Over Protective Structure (ROPS)
ISO 12117-2:2008
Top Guard
ISO 10262:1998 (Level I)

Dimensions - Standard Stick

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.

Dimensions - Long Stick

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.

Air Conditioning System

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 1.0 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).

Sound

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”

Sustainability

Recyclability
96%