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304 Mini Excavator

304 Mini Excavator

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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Net Power45HP

Engine ModelC1.7 Turbo

Gross Power - 2,400 rpm - SAE J1995:201448.4HP


EmissionsMeets U.S. EPA Tier 4 Final and EU Stage V emission standards.



Net Power - 2,400 rpm - ISO 9249, 80/1269/EEC45HP

NoteNet 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 Weight9867lb

Minimum Operating Weight with Canopy*8655lb

Maximum Operating Weight with Canopy**9647lb

Note (2)**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.

Maximum Operating Weight with Cab**9867lb

Minimum Operating Weight with Cab*8875lb

Dig Depth138.2in

Maximum Blade Depth18.7in

O/A Shipping Height100in

Maximum Dump Clearance147.2in

Stick Length66.7in

Maximum Dig Height201.8in

Maximum Reach - Ground Level214.4in

Track Width66.9in

Tail Swing with Counterweight51.2in

Swing Bearing - Height21.9in

Boom Height - Shipping Position75.2in

Boom Swing - Left20.9in

Maximum Reach219.3in

Boom In Reach92.1in

Boom Swing - Right28.7in

Track Belt/Shoe Width13.8in

Vertical Wall99.8in

Maximum Blade Height16.5in

Note*Overall Shipping Length depends on blade position during shipment.

Overall Shipping Length*194.9in

Ground Clearance12in

O/A Undercarriage Length87in

Tail Swing without Counterweight47.4in

NoteEuropean Union Directive “2000/14/EC”

Average Exterior Sound Pressure (ISO 6395:2008)97dB(A)

Operator Sound Pressure (ISO 6396:2008)76dB(A)

Maximum Reach - Ground Level204.7in

Vertical Wall94.3in

Note*Overall Shipping Length depends on blade position during shipment.

Tail Swing with Counterweight51.2in

Boom In Reach88.8in

Dig Depth126.4in

Maximum Dig Height198.4in

Maximum Blade Height16.5in

Swing Bearing - Height21.9in

Boom Swing - Left20.9in

Stick Length54.9in

O/A Undercarriage Length87in

Track Belt/Shoe Width13.8in

Boom Height - Shipping Position63.8in

Boom Swing - Right28.7in

Maximum Dump Clearance143.5in

Ground Clearance12in

Maximum Reach209.8in

O/A Shipping Height100in

Tail Swing without Counterweight47.4in

Maximum Blade Depth18.7in

Overall Shipping Length*194.9in


Steel Tracks430lb


Angle Blade243lb

Long Stick66lb

Ground Pressure - Minimum Weight4.2psi

Maximum Traction Force - Low Speed7329lbf

Travel Speed - Low2.2mile/h

Ground Pressure - Maximum Weight4.9psi

Travel Speed - High3.2mile/h

Maximum Traction Force - High Speed4271lbf

Gradeability - Maximum30 degrees

Cooling System2.9gal (US)

Engine Oil1.6gal (US)

Hydraulic System17gal (US)

Fuel Tank17gal (US)

Hydraulic Tank14gal (US)

Operating Pressure - Travel3553psi

Auxiliary Circuit - Secondary - Pressure3553psi

Digging Force - Stick - Long4316lbf

Auxiliary Circuit - Secondary - Flow7gal/min

Pump Flow at 2,400 rpm25gal/min

Operating Pressure - Swing2611psi

Auxiliary Circuit - Primary - Flow21gal/min

Auxiliary Circuit - Primary - Pressure3553psi

NoteFlow and pressure are not combinable. Under load, as flow rises pressure goes down.

TypeLoad Sensing Hydraulics with Variable Displacement Piston Pump

Digging Force - Stick - Standard4721lbf

Digging Force - Bucket8588lbf

Operating Pressure - Equipment3553psi

Boom Swing - Right50 Degrees

Machine Swing Speed9r/min

Boom Swing - Left78 Degrees

Angle Blade Height14.2in

Straight Blade Height14.2in

Straight Blade Width66.9in

Angle Blade Width66.9in

Angle Blade - Right25 Degrees

Angle Blade - Left25 Degrees

Roll Over Protective Structure (ROPS)ISO 12117-2:2008

Top GuardISO 10262:1998 (Level I)

Tip Over Protective Structure (TOPS)ISO 12117:1997


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


Smart Tech Electronic Pump


Automatic Swing Brake

Auxiliary Hydraulic Lines

One and Two Way Auxiliary Flow

Continuous Auxiliary Flow

Auxiliary Line Quick Disconnects


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


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)


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


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


Rubber Belt (350 mm/13.8 in)

Dozer Straight Blade

Dozer Blade Float

Tie Downs on Track Frame


Steel Track (350 mm/13.8 in)

Steel Track with Rubber Pads

Angle Blade


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


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


12 Volt Battery

Software (machine and monitor)

Maintenance Free Battery

Battery Disconnect

12 Volt Power Socket

Travel Alarm (optional in some regions)


Product Link PL243 (regulations apply)

Product Link PLE643 (regulations apply)


Counterweight (225 kg/496 lb)


Bio Oil Capable

Eco Drain

Water Jacket Heater


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)

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See Available Used options



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