With our huge inventory of new, used and rental equipment, WesTrac has the right machine for the job.
With our huge inventory of new, used and rental equipment, WesTrac has the right machine for the job.
Keep your operation working around the clock by making WesTrac your partner in parts. With over 75,000 product lines stocked in our warehouses, ready-to-go, we won't let you down.
The Cat® 304 Mini Excavator delivers power and performance in a compact size to help you work in a wide range of applications.
The Cat® 304 Mini Excavator delivers power and performance in a compact size to help you work in a wide range of applications.
Net Power | 33.6 kW | 45 hp |
Engine Model | C1.7 Turbo | C1.7 Turbo |
Gross Power - 2,400 rpm - SAE J1995:2014 | 36.1 kW | 48.4 hp |
Bore | 84 mm | 3.3 in |
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. |
Stroke | 100 mm | 3.9 in |
Displacement | 1.662 l | 101 in³ |
Net Power - 2,400 rpm - ISO 9249, 80/1269/EEC | 33.6 kW | 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. | 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 |
Minimum Operating Weight with Canopy* | 3925 kg | 8655 lb |
Maximum Operating Weight with Canopy** | 4375 kg | 9647 lb |
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. |
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. |
Maximum Operating Weight with Cab** | 4475 kg | 9867 lb |
Minimum Operating Weight with Cab* | 4025 kg | 8875 lb |
Weight Increase from Minimum Configuration
Steel Tracks | 195 kg | 430 lb |
Counterweight | 225 kg | 496 lb |
Angle Blade | 110 kg | 243 lb |
Long Stick | 30 kg | 66 lb |
Travel System
Ground Pressure - Minimum Weight | 28.7 kPa | 4.2 psi |
Maximum Traction Force - Low Speed | 32.6 kN | 7329 lbf |
Travel Speed - Low | 3.5 km/h | 2.2 mile/h |
Ground Pressure - Maximum Weight | 33.8 kPa | 4.9 psi |
Travel Speed - High | 5.2 km/h | 3.2 mile/h |
Maximum Traction Force - High Speed | 19 kN | 4271 lbf |
Gradeability - Maximum | 30 degrees | 30 degrees |
Service Refill Capacities
Cooling System | 11 l | 2.9 gal (US) |
Engine Oil | 6 l | 1.6 gal (US) |
Hydraulic System | 65 l | 17 gal (US) |
Fuel Tank | 63 l | 17 gal (US) |
Hydraulic Tank | 52 l | 14 gal (US) |
Hydraulic System
Operating Pressure - Travel | 245 bar | 3553 psi |
Auxiliary Circuit - Secondary - Pressure | 245 bar | 3553 psi |
Digging Force - Stick - Long | 19.2 kN | 4316 lbf |
Auxiliary Circuit - Secondary - Flow | 28 l/min | 7 gal/min |
Pump Flow at 2,400 rpm | 96 l/min | 25 gal/min |
Operating Pressure - Swing | 180 bar | 2611 psi |
Auxiliary Circuit - Primary - Flow | 65 l/min | 21 gal/min |
Auxiliary Circuit - Primary - Pressure | 245 bar | 3553 psi |
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. |
Type | Load Sensing Hydraulics with Variable Displacement Piston Pump | Load Sensing Hydraulics with Variable Displacement Piston Pump |
Digging Force - Stick - Standard | 21 kN | 4721 lbf |
Digging Force - Bucket | 38.2 kN | 8588 lbf |
Operating Pressure - Equipment | 245 bar | 3553 psi |
Swing System
Boom Swing - Right | 50 Degrees | 50 Degrees |
Machine Swing Speed | 9 r/min | 9 r/min |
Boom Swing - Left | 78 Degrees | 78 Degrees |
Blade
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 | 25 Degrees |
Angle Blade - Left | 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) |
Tip Over Protective Structure (TOPS) | ISO 12117:1997 | ISO 12117:1997 |
Sound
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) |
Note | European Union Directive “2000/14/EC” | European Union Directive “2000/14/EC” |
Dimensions - Standard Stick
Maximum Reach - Ground Level | 5200 mm | 204.7 in |
Vertical Wall | 2395 mm | 94.3 in |
Note | *Overall Shipping Length depends on blade position during shipment. | *Overall Shipping Length depends on blade position during shipment. |
Tail Swing with Counterweight | 1300 mm | 51.2 in |
Boom In Reach | 2255 mm | 88.8 in |
Dig Depth | 3210 mm | 126.4 in |
Maximum Dig Height | 5040 mm | 198.4 in |
Maximum Blade Height | 420 mm | 16.5 in |
Swing Bearing - Height | 557 mm | 21.9 in |
Boom Swing - Left | 530 mm | 20.9 in |
Stick Length | 1395 mm | 54.9 in |
O/A Undercarriage Length | 2210 mm | 87 in |
Track Belt/Shoe Width | 350 mm | 13.8 in |
Boom Height - Shipping Position | 1620 mm | 63.8 in |
Boom Swing - Right | 730 mm | 28.7 in |
Maximum Dump Clearance | 3645 mm | 143.5 in |
Ground Clearance | 305 mm | 12 in |
Maximum Reach | 5330 mm | 209.8 in |
O/A Shipping Height | 2540 mm | 100 in |
Tail Swing without Counterweight | 1205 mm | 47.4 in |
Maximum Blade Depth | 475 mm | 18.7 in |
Overall Shipping Length* | 4950 mm | 194.9 in |
Dimensions - Long Stick
Dig Depth | 3510 mm | 138.2 in |
Maximum Blade Depth | 475 mm | 18.7 in |
O/A Shipping Height | 2540 mm | 100 in |
Maximum Dump Clearance | 3740 mm | 147.2 in |
Stick Length | 1695 mm | 66.7 in |
Maximum Dig Height | 5125 mm | 201.8 in |
Maximum Reach - Ground Level | 5445 mm | 214.4 in |
Track Width | 1700 mm | 66.9 in |
Tail Swing with Counterweight | 1300 mm | 51.2 in |
Swing Bearing - Height | 557 mm | 21.9 in |
Boom Height - Shipping Position | 1910 mm | 75.2 in |
Boom Swing - Left | 530 mm | 20.9 in |
Maximum Reach | 5570 mm | 219.3 in |
Boom In Reach | 2340 mm | 92.1 in |
Boom Swing - Right | 730 mm | 28.7 in |
Track Belt/Shoe Width | 350 mm | 13.8 in |
Vertical Wall | 2535 mm | 99.8 in |
Maximum Blade Height | 420 mm | 16.5 in |
Note | *Overall Shipping Length depends on blade position during shipment. | *Overall Shipping Length depends on blade position during shipment. |
Overall Shipping Length* | 4950 mm | 194.9 in |
Ground Clearance | 305 mm | 12 in |
O/A Undercarriage Length | 2210 mm | 87 in |
Tail Swing without Counterweight | 1205 mm | 47.4 in |
Sustainability
Recyclability | 96% | 96% |
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) |
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 |
The Cat® 304 Mini Excavator delivers power and performance in a compact size to help you work in a wide range of applications.
Net Power | 33.6 kW | 45 hp |
Engine Model | C1.7 Turbo | C1.7 Turbo |
Gross Power - 2,400 rpm - SAE J1995:2014 | 36.1 kW | 48.4 hp |
Bore | 84 mm | 3.3 in |
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. |
Stroke | 100 mm | 3.9 in |
Displacement | 1.662 l | 101 in³ |
Net Power - 2,400 rpm - ISO 9249, 80/1269/EEC | 33.6 kW | 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. | 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 |
Minimum Operating Weight with Canopy* | 3925 kg | 8655 lb |
Maximum Operating Weight with Canopy** | 4375 kg | 9647 lb |
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. |
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. |
Maximum Operating Weight with Cab** | 4475 kg | 9867 lb |
Minimum Operating Weight with Cab* | 4025 kg | 8875 lb |
Weight Increase from Minimum Configuration
Steel Tracks | 195 kg | 430 lb |
Counterweight | 225 kg | 496 lb |
Angle Blade | 110 kg | 243 lb |
Long Stick | 30 kg | 66 lb |
Travel System
Ground Pressure - Minimum Weight | 28.7 kPa | 4.2 psi |
Maximum Traction Force - Low Speed | 32.6 kN | 7329 lbf |
Travel Speed - Low | 3.5 km/h | 2.2 mile/h |
Ground Pressure - Maximum Weight | 33.8 kPa | 4.9 psi |
Travel Speed - High | 5.2 km/h | 3.2 mile/h |
Maximum Traction Force - High Speed | 19 kN | 4271 lbf |
Gradeability - Maximum | 30 degrees | 30 degrees |
Service Refill Capacities
Cooling System | 11 l | 2.9 gal (US) |
Engine Oil | 6 l | 1.6 gal (US) |
Hydraulic System | 65 l | 17 gal (US) |
Fuel Tank | 63 l | 17 gal (US) |
Hydraulic Tank | 52 l | 14 gal (US) |
Hydraulic System
Operating Pressure - Travel | 245 bar | 3553 psi |
Auxiliary Circuit - Secondary - Pressure | 245 bar | 3553 psi |
Digging Force - Stick - Long | 19.2 kN | 4316 lbf |
Auxiliary Circuit - Secondary - Flow | 28 l/min | 7 gal/min |
Pump Flow at 2,400 rpm | 96 l/min | 25 gal/min |
Operating Pressure - Swing | 180 bar | 2611 psi |
Auxiliary Circuit - Primary - Flow | 65 l/min | 21 gal/min |
Auxiliary Circuit - Primary - Pressure | 245 bar | 3553 psi |
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. |
Type | Load Sensing Hydraulics with Variable Displacement Piston Pump | Load Sensing Hydraulics with Variable Displacement Piston Pump |
Digging Force - Stick - Standard | 21 kN | 4721 lbf |
Digging Force - Bucket | 38.2 kN | 8588 lbf |
Operating Pressure - Equipment | 245 bar | 3553 psi |
Swing System
Boom Swing - Right | 50 Degrees | 50 Degrees |
Machine Swing Speed | 9 r/min | 9 r/min |
Boom Swing - Left | 78 Degrees | 78 Degrees |
Blade
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 | 25 Degrees |
Angle Blade - Left | 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) |
Tip Over Protective Structure (TOPS) | ISO 12117:1997 | ISO 12117:1997 |
Sound
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) |
Note | European Union Directive “2000/14/EC” | European Union Directive “2000/14/EC” |
Dimensions - Standard Stick
Maximum Reach - Ground Level | 5200 mm | 204.7 in |
Vertical Wall | 2395 mm | 94.3 in |
Note | *Overall Shipping Length depends on blade position during shipment. | *Overall Shipping Length depends on blade position during shipment. |
Tail Swing with Counterweight | 1300 mm | 51.2 in |
Boom In Reach | 2255 mm | 88.8 in |
Dig Depth | 3210 mm | 126.4 in |
Maximum Dig Height | 5040 mm | 198.4 in |
Maximum Blade Height | 420 mm | 16.5 in |
Swing Bearing - Height | 557 mm | 21.9 in |
Boom Swing - Left | 530 mm | 20.9 in |
Stick Length | 1395 mm | 54.9 in |
O/A Undercarriage Length | 2210 mm | 87 in |
Track Belt/Shoe Width | 350 mm | 13.8 in |
Boom Height - Shipping Position | 1620 mm | 63.8 in |
Boom Swing - Right | 730 mm | 28.7 in |
Maximum Dump Clearance | 3645 mm | 143.5 in |
Ground Clearance | 305 mm | 12 in |
Maximum Reach | 5330 mm | 209.8 in |
O/A Shipping Height | 2540 mm | 100 in |
Tail Swing without Counterweight | 1205 mm | 47.4 in |
Maximum Blade Depth | 475 mm | 18.7 in |
Overall Shipping Length* | 4950 mm | 194.9 in |
Dimensions - Long Stick
Dig Depth | 3510 mm | 138.2 in |
Maximum Blade Depth | 475 mm | 18.7 in |
O/A Shipping Height | 2540 mm | 100 in |
Maximum Dump Clearance | 3740 mm | 147.2 in |
Stick Length | 1695 mm | 66.7 in |
Maximum Dig Height | 5125 mm | 201.8 in |
Maximum Reach - Ground Level | 5445 mm | 214.4 in |
Track Width | 1700 mm | 66.9 in |
Tail Swing with Counterweight | 1300 mm | 51.2 in |
Swing Bearing - Height | 557 mm | 21.9 in |
Boom Height - Shipping Position | 1910 mm | 75.2 in |
Boom Swing - Left | 530 mm | 20.9 in |
Maximum Reach | 5570 mm | 219.3 in |
Boom In Reach | 2340 mm | 92.1 in |
Boom Swing - Right | 730 mm | 28.7 in |
Track Belt/Shoe Width | 350 mm | 13.8 in |
Vertical Wall | 2535 mm | 99.8 in |
Maximum Blade Height | 420 mm | 16.5 in |
Note | *Overall Shipping Length depends on blade position during shipment. | *Overall Shipping Length depends on blade position during shipment. |
Overall Shipping Length* | 4950 mm | 194.9 in |
Ground Clearance | 305 mm | 12 in |
O/A Undercarriage Length | 2210 mm | 87 in |
Tail Swing without Counterweight | 1205 mm | 47.4 in |
Sustainability
Recyclability | 96% | 96% |
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) |
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 |