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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360° View
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 |
|---|---|
| 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. |
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 |
| 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 |
Weight Increase from Minimum Configuration
| Spec | Value |
|---|---|
| Steel Tracks | 430 lb 195 kg |
| Counterweight | 496 lb 225 kg |
| Angle Blade | 243 lb 110 kg |
| Long Stick | 66 lb 30 kg |
Travel System
| Spec | Value |
|---|---|
| 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 |
Service Refill Capacities
| Spec | Value |
|---|---|
| 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 |
Hydraulic System
| Spec | Value |
|---|---|
| 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 |
Swing System
| Spec | Value |
|---|---|
| Boom Swing – Right | 50 Degrees 50 Degrees |
| Machine Swing Speed | 9 r/min 9 r/min |
| Boom Swing – Left | 78 Degrees 78 Degrees |
Blade
| Spec | Value |
|---|---|
| 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 |
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) |
| Tip Over Protective Structure (TOPS) | ISO 12117:1997 ISO 12117:1997 |
Sound
| Spec | Value |
|---|---|
| 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” |
Dimensions - Standard Stick
| Spec | Value |
|---|---|
| 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 |
Dimensions - Long Stick
| Spec | Value |
|---|---|
| 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 |
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)
- 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)
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
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