304

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

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

Loan Calculator Credit Application

Build & Quote

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

Specifications
Equipment
Related Products

Engine
Gross Power - ISO 14396	48.4 hp / 36.1 kW
Net Power	45 hp / 33.6 kW
Engine Model	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.
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 / 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.
Note (2)	**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
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
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

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
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.

Swing System
Machine Swing Speed	9 r/min
Boom Swing - Left	78 Degrees
Boom Swing - Right	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
Angle Blade - Right	25 Degrees

Certification - Cab and Canopy
Roll Over Protective Structure (ROPS)	ISO 12117-2:2008
Top Guard	ISO 10262:1998 (Level I)

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.

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.

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 1.0 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).

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 1.0 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
Operator Sound Pressure (ISO 6396:2008)	76 dB(A)
Average Exterior Sound Pressure (ISO 6395:2008)	97 dB(A)
Note	European Union Directive “2000/14/EC”

Sustainability
Recyclability	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)

Equipment Management

Cat® Equipment Management gives you access to the data you need to keep your equipment on the job site and earning money. You can track equipment location and hours, monitor machine use and health, then take informed action that will keep your operation running smoothly, efficiently and profitably.

Model
VisionLink™

Heavy Duty Buckets - Mini Excavator

High strength buckets designed for maximum performance and value over a broad range of applications.

Model	Width	Capacity	Weight
305 mm (12 in), 48 L (1.7 ft3), Pin On, 40 mm (1.6 in)	12 in / 305 mm	1.7 ft³ / 48.09 l	143.3 lb / 65 kg
406 mm (16 in), 71 L (2.5 ft3), Pin On, 40 mm (1.6 in)	16 in / 406 mm	2.5 ft³ / 70.8 l	163.1 lb / 74 kg
508 mm (20 in), 93 L (3.3 ft3), Pin On, 40 mm (1.6 in)	20 in / 508 mm	3.3 ft³ / 93.4 l	191.8 lb / 87 kg
619 mm (24 in), 119 L (4.2 ft3), Pin On, 40 mm (1.6 in)	24.4 in / 619 mm	4.2 ft³ / 118.9 l	216.1 lb / 98 kg
914 mm (36 in), 215 L (7.6 ft3), Pin On, 40 mm (1.6 in)	36 in / 914 mm	7.6 ft³ / 215.19 l	324.7 lb / 147.3 kg
914 mm (36 in), 200 L (7.1 ft3), Pin On, 40 mm (1.6 in)	36 in / 914 mm	7.1 ft³ / 199.89 l	293.2 lb / 133 kg

Augers

Designed to drill holes for footings, fencing, signs and trees.

Model	Drive Shaft Torque at Maximum Pressure	Drive Method	Mounting Bracket Design
A23, 3 Ton Mini Excavators	1699.3 lb/ft / 2304 N·m	Gerotor Motor - Direct Drive	3 Ton Mini Excavator Pin On
A41, 3 Ton Mini Excavators	3038.8 lb/ft / 4120 N·m	Gerotor Motor - Single Planetary Reduction	3 Ton Mini Excavator Pin On

Digging Buckets - Mini Excavator

These buckets are ideal for digging in soft to moderate ground.

Model	Width	Capacity	Weight
300 mm (12 in), 41 L (1.4 ft3), CW05 Coupler, Bolt-On Teeth	11.8 in / 300 mm	1.4 ft³ / 41 l	112.4 lb / 51 kg

Ditch Cleaning Buckets - Mini Excavator

Used in ditch cleaning, sloping, grading and other finishing work.

Model	Width	Weight
1000 mm (40 in), 136 L (4.8 ft3), Pin On	40 in / 1000 mm	240.1 lb / 108.9 kg
1200 mm (47 in), 167 L (5.9 ft3), Pin On	47.2 in / 1200 mm	235.7 lb / 106.9 kg
1300 mm (51 in), 184 L (6.5 ft3), Pin On	51.2 in / 1300 mm	253.5 lb / 115 kg
1400 mm (55 in), 197 L (7 ft3), Pin On	55.1 in / 1400 mm	259.2 lb / 117.59 kg

Dual Lock™ Pin Grabber Couplers - Mini Excavator

Increase machine versatility and improve overall production.

Model	Weight	Width	Length
3-4 Ton Mini Excavators Hydraulic	90.4 lb / 41 kg	9.9 in / 252 mm	16.7 in / 423 mm

Tiltrotators

Helps you get the job done faster with the quality you expect from Cat products. Integrated to your excavator, Tiltrotators are productive, easy-to-use, and add value to your operation. Tiltrotators are a versatile solution providing enhancements to your operation.

Model	Machine Class	Weight	Interface Options: Top-Bottom
TRS4, Pin On (Pin Grabber)/S40, 3-4 Ton Mini Excavators	3-4 Ton Mini Excavators	297.6 lb / 135 kg	Pin On (Pin Grabber) Coupler / S40 Coupler
TRS4, Pin On (Pin Grabber)/S40, 3-4 Ton Mini Excavators	3-4 Ton Mini Excavators	297.6 lb / 135 kg	Pin On (Pin Grabber) Coupler / S40 Coupler

304