ALL DAY COMFORT
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Caterpillar
304 Mini Excavator
Net Power
45 hp
33.6 kW
Operating Weight
9867 lb
4475 kg
Dig Depth
138.2 in
3510 mm
Overview
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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Exterior
Model shown represents features on all Cat® Mini Excavators except where indicated.
Interior
Model shown represents features on all Cat® Mini Excavators except where indicated.
Features
EASY TO OPERATE
STICK STEER TRAVEL MODE
BIG PERFORMANCE IN A SMALL MACHINE
SAFETY ON THE JOB SITE
SIMPLE SERVICE FOR LESS DOWNTIME
LOWER OPERATING COSTS
SUSTAINABILITY
Details
Specifications
Engine
| Spec | Value |
|---|---|
| Gross Power – ISO 14396 | 48.4 hp 36.1 kW |
| 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 |
| 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. |
Weights
| Spec | Value |
|---|---|
| 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. |
Weight Increase from Minimum Configuration
| Spec | Value |
|---|---|
| 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
| Spec | Value |
|---|---|
| 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 |
Service Refill Capacities
| Spec | Value |
|---|---|
| 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
| Spec | Value |
|---|---|
| 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. |
Swing System
| Spec | Value |
|---|---|
| Machine Swing Speed | 9 r/min 9 r/min |
| Boom Swing – Left | 78 Degrees 78 Degrees |
| Boom Swing – Right | 50 Degrees 50 Degrees |
Blade
| Spec | Value |
|---|---|
| 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 |
Certification - Cab and Canopy
| Spec | Value |
|---|---|
| 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) |
Dimensions - Standard Stick
| Spec | Value |
|---|---|
| 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. |
Dimensions - Long Stick
| Spec | Value |
|---|---|
| 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. |
Air Conditioning System
| Spec | Value |
|---|---|
| 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). 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
| Spec | Value |
|---|---|
| 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” |
Sustainability
| Spec | Value |
|---|---|
| Recyclability | 96% 96% |
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)
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