Mini Excavators 304

Name: 304 Mini Excavator
Brand: Caterpillar

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Key Specs

Net Power: 45 hp; 33.6 kW

Operating Weight: 9867 lb; 4475 kg

Dig Depth: 138.2 in; 3510 mm

304
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Overview

Mini Excavators Inspired by Our Customers

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

Benefits

4 Industry First Features

Cat Exclusives in a Mini Excavator

Up to 10% Lower Total Ownership Costs

with extended service intervals, lower repair costs and easy service access

Up to 20% More Performance

in lifting, digging and multi-function capability

Features At A Glance

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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.

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)

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.

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.

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!

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.

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.

Maintenance is quick and easy on the Cat mini excavator. Routine check points are easy to access at ground level through the side doors.

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.

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)

Specifications Standard Equipment Optional Equipment

Product Specifications for 304

Weights

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.

Dimensions - Long Stick

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.

Weight Increase from Minimum Configuration

Counterweight	496 lb 225 kg
Long Stick	66 lb 30 kg
Steel Tracks	430 lb 195 kg
Angle Blade	243 lb 110 kg

Dimensions - Standard Stick

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
Track Width	66.9 in 1700 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.

Travel System

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

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

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

Machine Swing Speed	9 r/min 9 r/min
Boom Swing - Left	78 Degrees 78 Degrees
Boom Swing - Right	50 Degrees 50 Degrees

Blade

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

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)

Air Conditioning System

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 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 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

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

Recyclability

96% 96%

Engine

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
Gross Power - ISO 14396	48.4 hp 36.1 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.

304 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

304 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)

Product Specifications for 304

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Weights

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.

Dimensions - Long Stick

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.

Weight Increase from Minimum Configuration

Counterweight	496 lb 225 kg
Long Stick	66 lb 30 kg
Steel Tracks	430 lb 195 kg
Angle Blade	243 lb 110 kg

Dimensions - Standard Stick

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
Track Width	66.9 in 1700 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.

Travel System

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

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

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

Machine Swing Speed	9 r/min 9 r/min
Boom Swing - Left	78 Degrees 78 Degrees
Boom Swing - Right	50 Degrees 50 Degrees

Blade

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

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)

Air Conditioning System

Air Conditioning

Sound

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

Recyclability

96% 96%

Engine

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
Gross Power - ISO 14396	48.4 hp 36.1 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.

304 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

304 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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Excavators

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304

Net Power: 45 hp; 33.6 kW
Operating Weight: 9867 lb; 4475 kg
Dig Depth: 138.2 in; 3510 mm

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Excavators

303.5 CR

Net Power: 23.6 hp; 17.6 kW
Operating Weight: 9239 lb; 4190 kg
Dig Depth: 122.4 in; 3110 mm

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Excavators

305 CR - Tier 4 / Stage V

Net Power: 45 hp; 33.6 kW
Operating Weight: 12688 lb; 5754 kg
Dig Depth: 144.5 in; 3670 mm

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304 Mini Hydraulic Excavator

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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)

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)

Compatible Technology and Services

Leverage Caterpillar connected data and security principles to improve efficiencies, increase productivity and make your business more profitable.

VisionLink™

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VisionLink™ is a cloud-based software application that takes the guesswork out of fleet management with key insights to maximize performance - regardless of fleet size or equipment manufacturer. Receive equipment data seamlessly to your desktop or mobile device, all from a convenient centralized solution to make informed decisions at every turn.

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VisionLink™ is a cloud-based software application that takes the guesswork out of fleet management with key insights to maximize performance - regardless of fleet size or equipment manufacturer. Receive equipment data seamlessly to your desktop or mobile device, all from a convenient centralized solution to make informed decisions at every turn.

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Mini Excavators 304

Overview

Mini Excavators Inspired by Our Customers

Benefits

4 Industry First Features

Up to 10% Lower Total Ownership Costs

Up to 20% More Performance

Features At A Glance

ALL DAY COMFORT

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

Product Specifications for 304

Weights

Dimensions - Long Stick

Weight Increase from Minimum Configuration

Dimensions - Standard Stick

Travel System

Service Refill Capacities

Hydraulic System

Swing System

Blade

Certification - Cab and Canopy

Air Conditioning System

Sound

Sustainability

Engine

304 Standard Equipment

ENGINE

HYDRAULICS

OPERATOR ENVIRONMENT

UNDERCARRIAGE

BOOM, STICK AND LINKAGES

ELECTRICAL

GUARDING

OTHER

304 Optional Equipment

OPERATOR ENVIRONMENT

UNDERCARRIAGE

BOOM, STICK AND LINKAGES

ELECTRICAL

GUARDING

OTHER

Product Specifications for 304

Weights

Dimensions - Long Stick

Weight Increase from Minimum Configuration

Dimensions - Standard Stick

Travel System

Service Refill Capacities

Hydraulic System

Swing System

Blade

Certification - Cab and Canopy

Air Conditioning System

Sound

Sustainability

Engine

304 Standard Equipment

ENGINE

HYDRAULICS

OPERATOR ENVIRONMENT

UNDERCARRIAGE

BOOM, STICK AND LINKAGES

ELECTRICAL

GUARDING

OTHER

304 Optional Equipment

OPERATOR ENVIRONMENT

UNDERCARRIAGE

BOOM, STICK AND LINKAGES

ELECTRICAL

GUARDING

OTHER

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