304
ALL DAY COMFORT
- Choose either a canopy (not available in some regions) or a sealed and pressurized cab which can be equipped with air conditioning, adjustable wrist rests, and a suspension seat to help keep you working comfortably all day long.
EASY TO OPERATE
- Controls are easy to use and the intuitive Next Generation LCD monitor provides easy to read machine information. An advanced touchscreen monitor can also be equipped as an upgrade option.
STICK STEER TRAVEL MODE
- Moving around the job site is even easier with the Cat Stick Steer option. Easily switch from traditional travel controls with levers and pedals to joystick controls to move the machine and to operate the blade. The benefit of less effort and improved control is in your hands!
BIG PERFORMANCE IN A SMALL MACHINE
- Strong lift and dig performance helps you get the job done faster. The reduced radius tail swing design provides exceptional stability and performance. With a maximum width of 1700 mm (67 in), the 304 can access those hard to get into areas. Dozer float allows for easy clean up. An angle blade is also an option for finished grading and easier backfilling applications.
SAFETY ON THE JOB SITE
- Your safety is our top priority. The Cat mini excavator is designed to help keep you safe on the job. Courtesy work lights and a fluorescent retractable seat belt are just a couple of the safety features we’ve built into the machine.
SIMPLE SERVICE FOR LESS DOWNTIME
- Maintenance is quick and easy on the Cat mini excavator. Routine check points are easy to access at ground level through the side doors.
LOWER OPERATING COSTS
- Equipped with features such as auto idle, auto engine shutdown, and efficient hydraulics with a variable displacement pump, the Cat mini excavator was designed with reducing your operating costs in mind.
SUSTAINABILITY
- The Cat® C1.7 engine meets U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 emission standards.
- Cat diesel engines are required to use ULSD (ultra-low sulfur diesel fuel with 15 ppm of sulfur or less) or ULSD blended with the following lower-carbon intensity fuels up to: 20% biodiesel FAME (fatty acid methyl ester) * or 100% renewable diesel, HVO (hydrotreated vegetable oil) and GTL (gas-to-liquid) fuels. Refer to guidelines for successful application. Please consult your Cat dealer or “Caterpillar Machine Fluids Recommendations” (SEBU6250) for details.
- Auto Idle helps reduce unnecessary fuel burn and greenhouse gas emissions by allowing the engine to automatically go into idle mode when the machine is not working.
- Engine Idle Shutdown Timer reduces fuel burn, greenhouse gas emissions and unnecessary idle time by shutting down the machine after a pre-set idling period.
- Cruise control helps you maintain a constant speed as you travel across your jobsite saving fuel and reducing greenhouse gas emissions.
- The Cat® Seat Belt Reminder provides audible and visual warnings to remind operators to buckle up during machine operation. The easy-to-install system is compatible with all equipment brands to help ensure operator safety.
- Extended maintenance intervals not only reduce downtime but decrease the amount of fluid and filters that are replaced over the life of the machine.
- Remote Flash minimizes downtime and maintenance time while keeping your asset running with maximum efficiency. Alerts for machine updates are sent virtually from your Cat dealer and updates can be deployed without a dealer technician needing to be onsite.(if equipped)
- Remote Troubleshoot decreases maintenance time and keeps your machine running with maximum efficiency by allowing your Cat dealer to virtually test the machine while working. Once a problem is identified, a technician can fix it the first time, saving time and money.(if equipped)
- Cat Grade with advanced 2D and 3D technologies combine advanced guidance with optional automated machine control helping you reach grading targets while reducing fuel burn and greenhouse gas emissions by improving efficiency, job site productivity, and accuracy. (if equipped).
*Engines with no aftertreatment devices can use higher blends, up to 100% biodiesel. (for use of blends higher than 20% biodiesel, consult your Cat dealer)
Videos
- Introducing the Next Generation Cat 304 and 305 CR Mini Excavators
- Overview of the Next Generation Cat 304 and 305 CR Mini Excavators
- Standard Monitor on the Next Generation Cat Mini Excavators
- Comparing the Next Generation Cat 304 and 305 CR Mini Excavators to the E2 Series
- Advanced Monitor on the Next Generation Cat Mini Excavators
- Cat 304 Mini Excavator Customer Story - Hilcon LLC (North Carolina, United States)
Virtual Tours
Documents & Brochures
- 304 Small Product Brochure (AUZ, EU, NACD)
- Cat Mini Hydraulic Excavators Product Line Brochure (North America)
- Cat Mini Hydraulic Excavators Product Line Brochure (Europe)
- Options And Accessories Kit Guide for Mini Hydraulic Excavators
- Cat Attachments for Mini Excavators Brochure
- Attachment Compatibility Guide for Mini Excavators
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)
Additional information
Offering Type | |
---|---|
Weights - Note (1) | *Minimum Weight is based on rubber tracks, operator, full fuel tank, standard stick, straight blade, no bucket and no extra counterweight. |
Weights - Note (2) | **Maximum Weight is based on steel tracks, operator, full fuel tank, long stick, straight blade, extra counterweight and no bucket. |
Hydraulic System - Note | Flow and pressure are not combinable. Under load, as flow rises pressure goes down. |
Sound - Note | European Union Directive “2000/14/EC” |
Dimensions - Standard Stick - Note | *Overall Shipping Length depends on blade position during shipment. |
Dimensions - Long Stick - Note | *Overall Shipping Length depends on blade position during shipment. |
Engine - Net Power | 33.6 kW ( 45 HP ) |
Engine Model | C1.7 Turbo |
Engine - Gross Power - 2,400 rpm - SAE J1995:2014 | 36.1 kW ( 48.4 HP ) |
Engine - Bore | 84 mm ( 3.3 in ) |
Engine - Emissions | Meets U.S. EPA Tier 4 Final and EU Stage V emission standards. |
Engine - Stroke | 100 mm ( 3.9 in ) |
Engine - Displacement | 1.662 l ( 101 in³ ) |
Engine - Net Power - 2,400 rpm - ISO 9249, 80/1269/EEC | 33.6 kW ( 45 HP ) |
Engine - 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 | 4475 kg ( 9867 lb ) |
Weights - Minimum Operating Weight with Canopy* | 3925 kg ( 8655 lb ) |
Weights - Maximum Operating Weight with Canopy** | 4375 kg ( 9647 lb ) |
Weights - Maximum Operating Weight with Cab** | 4475 kg ( 9867 lb ) |
Weights - Minimum Operating Weight with Cab* | 4025 kg ( 8875 lb ) |
Weight Increase from Minimum Configuration - Steel Tracks | 195 kg ( 430 lb ) |
Weight Increase from Minimum Configuration - Counterweight | 225 kg ( 496 lb ) |
Weight Increase from Minimum Configuration - Angle Blade | 110 kg ( 243 lb ) |
Weight Increase from Minimum Configuration - Long Stick | 30 kg ( 66 lb ) |
Travel System - Ground Pressure - Minimum Weight | 28.7 kPa ( 4.2 psi ) |
Travel System - Maximum Traction Force - Low Speed | 32.6 kN ( 7329 lbf ) |
Travel System - Travel Speed - Low | 3.5 km/h ( 2.2 mile/h ) |
Travel System - Ground Pressure - Maximum Weight | 33.8 kPa ( 4.9 psi ) |
Travel System - Travel Speed - High | 5.2 km/h ( 3.2 mile/h ) |
Travel System - Maximum Traction Force - High Speed | 19 kN ( 4271 lbf ) |
Travel System - Gradeability - Maximum | 30 degrees |
Service Refill Capacities - Cooling System | 11 l ( 2.9 gal (US) ) |
Service Refill Capacities - Engine Oil | 6 l ( 1.6 gal (US) ) |
Service Refill Capacities - Hydraulic System | 65 l ( 17 gal (US) ) |
Service Refill Capacities - Fuel Tank | 63 l ( 17 gal (US) ) |
Service Refill Capacities - Hydraulic Tank | 52 l ( 14 gal (US) ) |
Hydraulic System - Operating Pressure - Travel | 245 bar ( 3553 psi ) |
Hydraulic System - Auxiliary Circuit - Secondary - Pressure | 245 bar ( 3553 psi ) |
Hydraulic System - Digging Force - Stick - Long | 19.2 kN ( 4316 lbf ) |
Hydraulic System - Auxiliary Circuit - Secondary - Flow | 28 l/min ( 7 gal/min ) |
Hydraulic System - Pump Flow at 2,400 rpm | 96 l/min ( 25 gal/min ) |
Hydraulic System - Operating Pressure - Swing | 180 bar ( 2611 psi ) |
Hydraulic System - Auxiliary Circuit - Primary - Flow | 65 l/min ( 21 gal/min ) |
Hydraulic System - Auxiliary Circuit - Primary - Pressure | 245 bar ( 3553 psi ) |
Hydraulic System - Type | Load Sensing Hydraulics with Variable Displacement Piston Pump |
Hydraulic System - Digging Force - Stick - Standard | 21 kN ( 4721 lbf ) |
Hydraulic System - Digging Force - Bucket | 38.2 kN ( 8588 lbf ) |
Hydraulic System - Operating Pressure - Equipment | 245 bar ( 3553 psi ) |
Swing System - Boom Swing - Right | 50 Degrees |
Swing System - Machine Swing Speed | 9 r/min ( 9 r/min ) |
Swing System - Boom Swing - Left | 78 Degrees |
Angle Blade Height | 360 mm ( 14.2 in ) |
Straight Blade Height | 360 mm ( 14.2 in ) |
Straight Blade Width | 1700 mm ( 66.9 in ) |
Angle Blade Width | 1700 mm ( 66.9 in ) |
Angle Blade - Right | 25 Degrees |
Angle Blade - Left | 25 Degrees |
Certification - Cab and Canopy - Roll Over Protective Structure (ROPS) | ISO 12117-2:2008 |
Certification - Cab and Canopy - Top Guard | ISO 10262:1998 (Level I) |
Certification - Cab and Canopy - Tip Over Protective Structure (TOPS) | ISO 12117:1997 |
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) ) |
Dimensions - Standard Stick - Maximum Reach - Ground Level | 5200 mm ( 204.7 in ) |
Dimensions - Standard Stick - Vertical Wall | 2395 mm ( 94.3 in ) |
Dimensions - Standard Stick - Tail Swing with Counterweight | 1300 mm ( 51.2 in ) |
Dimensions - Standard Stick - Boom In Reach | 2255 mm ( 88.8 in ) |
Dimensions - Standard Stick - Dig Depth | 3210 mm ( 126.4 in ) |
Dimensions - Standard Stick - Maximum Dig Height | 5040 mm ( 198.4 in ) |
Dimensions - Standard Stick - Maximum Blade Height | 420 mm ( 16.5 in ) |
Dimensions - Standard Stick - Swing Bearing - Height | 557 mm ( 21.9 in ) |
Dimensions - Standard Stick - Boom Swing - Left | 530 mm ( 20.9 in ) |
Dimensions - Standard Stick - Stick Length | 1395 mm ( 54.9 in ) |
Dimensions - Standard Stick - O/A Undercarriage Length | 2210 mm ( 87 in ) |
Dimensions - Standard Stick - Track Belt/Shoe Width | 350 mm ( 13.8 in ) |
Dimensions - Standard Stick - Boom Height - Shipping Position | 1620 mm ( 63.8 in ) |
Dimensions - Standard Stick - Boom Swing - Right | 730 mm ( 28.7 in ) |
Dimensions - Standard Stick - Maximum Dump Clearance | 3645 mm ( 143.5 in ) |
Dimensions - Standard Stick - Ground Clearance | 305 mm ( 12 in ) |
Dimensions - Standard Stick - Maximum Reach | 5330 mm ( 209.8 in ) |
Dimensions - Standard Stick - O/A Shipping Height | 2540 mm ( 100 in ) |
Dimensions - Standard Stick - Tail Swing without Counterweight | 1205 mm ( 47.4 in ) |
Dimensions - Standard Stick - Maximum Blade Depth | 475 mm ( 18.7 in ) |
Dimensions - Standard Stick - Overall Shipping Length* | 4950 mm ( 194.9 in ) |
Dimensions - Long Stick - Dig Depth | 3510 mm ( 138.2 in ) |
Dimensions - Long Stick - Maximum Blade Depth | 475 mm ( 18.7 in ) |
Dimensions - Long Stick - O/A Shipping Height | 2540 mm ( 100 in ) |
Dimensions - Long Stick - Maximum Dump Clearance | 3740 mm ( 147.2 in ) |
Dimensions - Long Stick - Stick Length | 1695 mm ( 66.7 in ) |
Dimensions - Long Stick - Maximum Dig Height | 5125 mm ( 201.8 in ) |
Dimensions - Long Stick - Maximum Reach - Ground Level | 5445 mm ( 214.4 in ) |
Dimensions - Long Stick - Track Width | 1700 mm ( 66.9 in ) |
Dimensions - Long Stick - Tail Swing with Counterweight | 1300 mm ( 51.2 in ) |
Dimensions - Long Stick - Swing Bearing - Height | 557 mm ( 21.9 in ) |
Dimensions - Long Stick - Boom Height - Shipping Position | 1910 mm ( 75.2 in ) |
Dimensions - Long Stick - Boom Swing - Left | 530 mm ( 20.9 in ) |
Dimensions - Long Stick - Maximum Reach | 5570 mm ( 219.3 in ) |
Dimensions - Long Stick - Boom In Reach | 2340 mm ( 92.1 in ) |
Dimensions - Long Stick - Boom Swing - Right | 730 mm ( 28.7 in ) |
Dimensions - Long Stick - Track Belt/Shoe Width | 350 mm ( 13.8 in ) |
Dimensions - Long Stick - Vertical Wall | 2535 mm ( 99.8 in ) |
Dimensions - Long Stick - Maximum Blade Height | 420 mm ( 16.5 in ) |
Dimensions - Long Stick - Overall Shipping Length* | 4950 mm ( 194.9 in ) |
Dimensions - Long Stick - Ground Clearance | 305 mm ( 12 in ) |
Dimensions - Long Stick - O/A Undercarriage Length | 2210 mm ( 87 in ) |
Dimensions - Long Stick - Tail Swing without Counterweight | 1205 mm ( 47.4 in ) |
Sustainability - Recyclability | 96% |
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Ditch Cleaning Buckets - Mini Excavator
1000 mm (39 in)
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Ditch Cleaning Buckets - Mini Excavator
1000 mm (39 in)
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Ditch Cleaning Buckets - Mini Excavator
1200 mm (47 in)
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Ditch Cleaning Buckets - Mini Excavator
1200 mm (47 in)
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Ditch Cleaning Buckets - Mini Excavator
1200 mm (47 in)
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Grading Buckets - Mini Excavator
1200 mm (47 in)
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Ditch Cleaning Buckets - Mini Excavator
1400 mm (55 in)
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Dual Lock™ Pin Grabber Couplers - Mini Excavator
3-4 Ton Mini Excavators Hydraulic
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Dual Lock™ Pin Grabber Couplers - Mini Excavator
3-4 Ton Mini Excavators Manual
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Banana Buckets
300 mm (12 in)
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Digging Buckets - Mini Excavator
300 mm (12 in)
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Digging Buckets - Mini Excavator
300 mm (12 in)
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Digging Buckets - Mini Excavator
300 mm (12 in)
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Heavy Duty Buckets - Mini Excavator
305 mm (12 in)
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Heavy Duty Buckets - Mini Excavator
305 mm (12 in)
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Compaction Wheels
305 mm (12 in) 3-4 Ton, Pin On
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Utility Thumbs
326 mm (13 in) 8 Teeth/2 Tines
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Digging Buckets - Mini Excavator
400 mm (16 in)
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Digging Buckets - Mini Excavator
400 mm (16 in)
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Banana Buckets
400 mm (16 in)
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Digging Buckets - Mini Excavator
400 mm (16 in)
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Heavy Duty Buckets - Mini Excavator
406 mm (16 in)
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Heavy Duty Buckets - Mini Excavator
406 mm (16 in)
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Compaction Wheels
406 mm (16 in) 3-4 Ton, Pin On
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Digging Buckets - Mini Excavator
450 mm (18 in)
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Digging Buckets - Mini Excavator
450 mm (18 in)
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Digging Buckets - Mini Excavator
460 mm (18 in)
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Rippers
490 mm (19 in)
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Digging Buckets - Mini Excavator
500 mm (20 in)
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Digging Buckets - Mini Excavator
500 mm (20 in)
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Digging Buckets - Mini Excavator
500 mm (20 in)
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Digging Buckets - Mini Excavator
500 mm (20 in)
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Heavy Duty Buckets - Mini Excavator
508 mm (20 in)
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Heavy Duty Buckets - Mini Excavator
508 mm (20 in)
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Compaction Wheels
559 mm (22 in) 3-4 Ton, Pin On
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Digging Buckets - Mini Excavator
600 mm (24 in)
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Digging Buckets - Mini Excavator
600 mm (24 in)
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Digging Buckets - Mini Excavator
600 mm (24 in)
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Heavy Duty Buckets - Mini Excavator
619 mm (24 in)
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Heavy Duty Buckets - Mini Excavator
619 mm (24 in)
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Digging Buckets - Mini Excavator
700 mm (28 in)
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Digging Buckets - Mini Excavator
700 mm (28 in)
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Digging Buckets - Mini Excavator
750 mm (30 in)
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Heavy Duty Buckets - Mini Excavator
914 mm (36 in)
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Heavy Duty Buckets - Mini Excavator
914 mm (36 in)
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Augers
A23
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Augers
A41
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Hammers
B4
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Hammers
B6
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Vibratory Plate Compactors
CVP16
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Vibratory Plate Compactors
CVP28
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CW Series Couplers
CW-05 Hydraulic 3-4 Ton Mini Excavators
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CW Series Couplers
CW-05 Hydraulic 3-4 Ton Mini Excavators
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CW Series Couplers
CW-05 Manual 3-4 Ton Mini Excavators
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CW Series Couplers
CW-05 Manual 3-4 Ton Mini Excavators
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CW Series Couplers
CW-10 Hydraulic 4 Ton Mini Excavators
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CW Series Couplers
CW-10 Hydraulic 4 Ton Mini Excavators
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CW Series Couplers
CW-10 Hydraulic 5 Ton Mini Excavators
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CW Series Couplers
CW-10 Manual 4 Ton Mini Excavators
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CW Series Couplers
CW-10 Manual 4 Ton Mini Excavators
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CW Series Couplers
CW-10 Manual 5 Ton Mini Excavators
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CW Series Couplers
CW-10 Manual 5 Ton Mini Excavators
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Hammers
H55s
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Hammers
H65s
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S Type Couplers
S-40 Pin Grabber 3 Ton
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S Type Couplers
S-40 Pin Grabber LCS 3 Ton
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