The Cat® 304 Mini Excavator delivers power and performance in a compact size to help you work in a wide range of applications.
| Net Power | 45 hp |
| Operating Weight | 9867 lb |
| Dig Depth | 138.2 in |
| Net Power | 45 hp |
| Engine Model | C1.7 Turbo |
| Net Power – 2,400 rpm – ISO 9249, 80/1269/EEC | 45 hp |
| Gross Power – ISO 14396 | 48.4 hp |
| Bore | 3.3 in |
| Stroke | 3.9 in |
| Displacement | 101 in³ |
| 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. |
| Operating Weight | 9867 lb |
| Minimum Operating Weight with Canopy* | 8655 lb |
| Maximum Operating Weight with Canopy** | 9647 lb |
| Minimum Operating Weight with Cab* | 8875 lb |
| Maximum Operating Weight with Cab** | 9867 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. |
| Dig Depth | 138.2 in |
| Vertical Wall | 99.8 in |
| Maximum Reach – Ground Level | 214.4 in |
| Maximum Reach | 219.3 in |
| Maximum Dig Height | 201.8 in |
| Maximum Dump Clearance | 147.2 in |
| Boom In Reach | 92.1 in |
| Tail Swing without Counterweight | 47.4 in |
| Tail Swing with Counterweight | 51.2 in |
| Maximum Blade Height | 16.5 in |
| Maximum Blade Depth | 18.7 in |
| Boom Height – Shipping Position | 75.2 in |
| O/A Shipping Height | 100 in |
| Swing Bearing – Height | 21.9 in |
| O/A Undercarriage Length | 87 in |
| Overall Shipping Length* | 194.9 in |
| Boom Swing – Right | 28.7 in |
| Boom Swing – Left | 20.9 in |
| Track Belt/Shoe Width | 13.8 in |
| Track Width | 66.9 in |
| Ground Clearance | 12 in |
| Stick Length | 66.7 in |
| Note | *Overall Shipping Length depends on blade position during shipment. |
| Counterweight | 496 lb |
| Long Stick | 66 lb |
| Steel Tracks | 430 lb |
| Angle Blade | 243 lb |
| Dig Depth | 126.4 in |
| Vertical Wall | 94.3 in |
| Maximum Reach – Ground Level | 204.7 in |
| Maximum Reach | 209.8 in |
| Maximum Dig Height | 198.4 in |
| Maximum Dump Clearance | 143.5 in |
| Boom In Reach | 88.8 in |
| Tail Swing without Counterweight | 47.4 in |
| Tail Swing with Counterweight | 51.2 in |
| Maximum Blade Height | 16.5 in |
| Maximum Blade Depth | 18.7 in |
| Boom Height – Shipping Position | 63.8 in |
| O/A Shipping Height | 100 in |
| Swing Bearing – Height | 21.9 in |
| O/A Undercarriage Length | 87 in |
| Overall Shipping Length* | 194.9 in |
| Boom Swing – Right | 28.7 in |
| Boom Swing – Left | 20.9 in |
| Track Belt/Shoe Width | 13.8 in |
| Track Width | 66.9 in |
| Ground Clearance | 12 in |
| Stick Length | 54.9 in |
| Note | *Overall Shipping Length depends on blade position during shipment. |
| Travel Speed – High | 3.2 mile/h |
| Travel Speed – Low | 2.2 mile/h |
| Maximum Traction Force – High Speed | 4271 lbf |
| Maximum Traction Force – Low Speed | 7329 lbf |
| Ground Pressure – Minimum Weight | 4.2 psi |
| Ground Pressure – Maximum Weight | 4.9 psi |
| Gradeability – Maximum | 30 degrees |
| Cooling System | 2.9 gal (US) |
| Engine Oil | 1.6 gal (US) |
| Fuel Tank | 17 gal (US) |
| Hydraulic Tank | 14 gal (US) |
| Hydraulic System | 17 gal (US) |
| Type | Load Sensing Hydraulics with Variable Displacement Piston Pump |
| Pump Flow at 2,400 rpm | 25 gpm |
| Operating Pressure – Equipment | 3553 psi |
| Operating Pressure – Travel | 3553 psi |
| Operating Pressure – Swing | 2611 psi |
| Auxiliary Circuit – Primary – Flow | 21 gpm |
| Auxiliary Circuit – Primary – Pressure | 3553 psi |
| Auxiliary Circuit – Secondary – Flow | 7 gpm |
| Auxiliary Circuit – Secondary – Pressure | 3553 psi |
| Digging Force – Stick – Standard | 4721 lbf |
| Digging Force – Stick – Long | 4316 lbf |
| Digging Force – Bucket | 8588 lbf |
| Note | Flow and pressure are not combinable. Under load, as flow rises pressure goes down. |
| Machine Swing Speed | 9 r/min |
| Boom Swing – Left | 78 Degrees |
| Boom Swing – Right | 50 Degrees |
| Straight Blade Width | 66.9 in |
| Straight Blade Height | 14.2 in |
| Angle Blade Width | 66.9 in |
| Angle Blade Height | 14.2 in |
| Angle Blade – Left | 25 Degrees |
| Angle Blade – Right | 25 Degrees |
| Roll Over Protective Structure (ROPS) | ISO 12117-2:2008 |
| Top Guard | 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 |
| Operator Sound Pressure (ISO 6396:2008) | 76 dB(A) |
| Average Exterior Sound Pressure (ISO 6395:2008) | 97 dB(A) |
| Note | European Union Directive “2000/14/EC” |
| Recyclability | 96% |
| 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 |
| Accumulator |
| 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) |
| 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) |
| Rubber Belt (350 mm/13.8 in) |
| Dozer Straight Blade |
| Dozer Blade Float |
| Tie Downs on Track Frame |
| 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 |
| 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) |
| ROPS – ISO 12117-2:2008 |
| Top Guard ISO 10262:1998 Level I |
| Eco Drain |
| 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 |
| Steel Track (350 mm/13.8 in) |
| Angle Blade |
| 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) |
| Cat Grade Advanced 2D |
| Cat Grade 3D |
| Top Guard ISO 10262:1998 (Level II) |
| Front Guard (Mesh) ISO 10262:1998 (Level I) |
| Front Guard (Heavy Duty) ISO 10262:1998 Level (II) |
| Bio Oil Capable |
| Water Jacket Heater |
| Counterweight (225 kg/496 lb) |
