304 Mini Excavator

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Description

Technical Specifications

Benefits and Features

Equipment

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The Cat® 304 Mini Excavator delivers power and performance in a compact size to help you work in a wide range of applications.

Engine
Net Power	45 hp
Engine Model	C1.7 Turbo
Gross Power - 2,400 rpm - SAE J1995:2014	48.4 hp
Bore	3.3 in
Emissions	Meets U.S. EPA Tier 4 Final and EU Stage V emission standards.
Stroke	3.9 in
Displacement	101 in³
Net Power - 2,400 rpm - ISO 9249, 80/1269/EEC	45 hp
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	9867 lb
Minimum Operating Weight with Canopy*	8655 lb
Maximum Operating Weight with Canopy**	9647 lb
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**	9867 lb
Minimum Operating Weight with Cab*	8875 lb
Dimensions - Long Stick
Dig Depth	138.2 in
Maximum Blade Depth	18.7 in
O/A Shipping Height	100 in
Maximum Dump Clearance	147.2 in
Stick Length	66.7 in
Maximum Dig Height	201.8 in
Maximum Reach - Ground Level	214.4 in
Track Width	66.9 in
Tail Swing with Counterweight	51.2 in
Swing Bearing - Height	21.9 in
Boom Height - Shipping Position	75.2 in
Boom Swing - Left	20.9 in
Maximum Reach	219.3 in
Boom In Reach	92.1 in
Boom Swing - Right	28.7 in
Track Belt/Shoe Width	13.8 in
Vertical Wall	99.8 in
Maximum Blade Height	16.5 in
Note	*Overall Shipping Length depends on blade position during shipment.
Overall Shipping Length*	194.9 in
Ground Clearance	12 in
O/A Undercarriage Length	87 in
Tail Swing without Counterweight	47.4 in
Weight Increase from Minimum Configuration
Steel Tracks	430 lb
Counterweight	496 lb
Angle Blade	243 lb
Long Stick	66 lb
Travel System
Ground Pressure - Minimum Weight	4.2 psi
Maximum Traction Force - Low Speed	7329 lbf
Travel Speed - Low	2.2 mile/h
Ground Pressure - Maximum Weight	4.9 psi
Travel Speed - High	3.2 mile/h
Maximum Traction Force - High Speed	4271 lbf
Gradeability - Maximum	30 degrees
Service Refill Capacities
Cooling System	2.9 gal (US)
Engine Oil	1.6 gal (US)
Hydraulic System	17 gal (US)
Fuel Tank	17 gal (US)
Hydraulic Tank	14 gal (US)
Hydraulic System
Operating Pressure - Travel	3553 psi
Auxiliary Circuit - Secondary - Pressure	3553 psi
Digging Force - Stick - Long	4316 lbf
Auxiliary Circuit - Secondary - Flow	7 gal/min
Pump Flow at 2,400 rpm	25 gal/min
Operating Pressure - Swing	2611 psi
Auxiliary Circuit - Primary - Flow	21 gal/min
Auxiliary Circuit - Primary - Pressure	3553 psi
Note	Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Type	Load Sensing Hydraulics with Variable Displacement Piston Pump
Digging Force - Stick - Standard	4721 lbf
Digging Force - Bucket	8588 lbf
Operating Pressure - Equipment	3553 psi
Swing System
Boom Swing - Right	50 Degrees
Machine Swing Speed	9 r/min
Boom Swing - Left	78 Degrees
Blade
Angle Blade Height	14.2 in
Straight Blade Height	14.2 in
Straight Blade Width	66.9 in
Angle Blade Width	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
Top Guard	ISO 10262:1998 (Level I)
Tip Over Protective Structure (TOPS)	ISO 12117:1997
Sound
Average Exterior Sound Pressure (ISO 6395:2008)	97 dB(A)
Operator Sound Pressure (ISO 6396:2008)	76 dB(A)
Note	European Union Directive “2000/14/EC”
Dimensions - Standard Stick
Maximum Reach - Ground Level	204.7 in
Vertical Wall	94.3 in
Note	*Overall Shipping Length depends on blade position during shipment.
Tail Swing with Counterweight	51.2 in
Boom In Reach	88.8 in
Dig Depth	126.4 in
Maximum Dig Height	198.4 in
Maximum Blade Height	16.5 in
Swing Bearing - Height	21.9 in
Boom Swing - Left	20.9 in
Stick Length	54.9 in
O/A Undercarriage Length	87 in
Track Belt/Shoe Width	13.8 in
Boom Height - Shipping Position	63.8 in
Boom Swing - Right	28.7 in
Maximum Dump Clearance	143.5 in
Ground Clearance	12 in
Maximum Reach	209.8 in
O/A Shipping Height	100 in
Tail Swing without Counterweight	47.4 in
Maximum Blade Depth	18.7 in
Overall Shipping Length*	194.9 in
Sustainability
Recyclability	96%

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)

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)