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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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
- 9,867 lb
- Minimum Operating Weight with Canopy*
- 8,655 lb
- Maximum Operating Weight with Canopy**
- 9,647 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**
- 9,867 lb
- Minimum Operating Weight with Cab*
- 8,875 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
- 7,329 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
- 4,271 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
- 3,553 psi
- Auxiliary Circuit - Secondary - Pressure
- 3,553 psi
- Digging Force - Stick - Long
- 4,316 lbf
- Auxiliary Circuit - Secondary - Flow
- 7 gal/min
- Pump Flow at 2,400 rpm
- 25 gal/min
- Operating Pressure - Swing
- 2,611 psi
- Auxiliary Circuit - Primary - Flow
- 21 gal/min
- Auxiliary Circuit - Primary - Pressure
- 3,553 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
- 4,721 lbf
- Digging Force - Bucket
- 8,588 lbf
- Operating Pressure - Equipment
- 3,553 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 12,117-2:2,008
- Top Guard
- ISO 10,262:1,998 (Level I)
- Tip Over Protective Structure (TOPS)
- ISO 12,117:1,997
Sound
- Average Exterior Sound Pressure (ISO 6395:2008)
- 97 dB(A)
- Operator Sound Pressure (ISO 6396:2008)
- 76 dB(A)
- Note
- European Union Directive “2,000/14/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%
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
Specifications
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
- 9,867 lb
- Minimum Operating Weight with Canopy*
- 8,655 lb
- Maximum Operating Weight with Canopy**
- 9,647 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**
- 9,867 lb
- Minimum Operating Weight with Cab*
- 8,875 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
- 7,329 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
- 4,271 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
- 3,553 psi
- Auxiliary Circuit - Secondary - Pressure
- 3,553 psi
- Digging Force - Stick - Long
- 4,316 lbf
- Auxiliary Circuit - Secondary - Flow
- 7 gal/min
- Pump Flow at 2,400 rpm
- 25 gal/min
- Operating Pressure - Swing
- 2,611 psi
- Auxiliary Circuit - Primary - Flow
- 21 gal/min
- Auxiliary Circuit - Primary - Pressure
- 3,553 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
- 4,721 lbf
- Digging Force - Bucket
- 8,588 lbf
- Operating Pressure - Equipment
- 3,553 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 12,117-2:2,008
- Top Guard
- ISO 10,262:1,998 (Level I)
- Tip Over Protective Structure (TOPS)
- ISO 12,117:1,997
Sound
- Average Exterior Sound Pressure (ISO 6395:2008)
- 97 dB(A)
- Operator Sound Pressure (ISO 6396:2008)
- 76 dB(A)
- Note
- European Union Directive “2,000/14/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%
Standard/Optional Features
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