The Cat® 304E2 CR Mini Hydraulic Excavator delivers efficient performance, durability and versatility in a compact design to help you work in a variety of applications.
Engine | |
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Engine Model | Cat® C2.4 |
Net Power | 40.2 HP / 30 kW |
Rated Net Power - 2,200 rpm - ISO 9249/EEC 80/1269 | 40.2 HP / 30 kW |
Bore | 3.4 in / 87 mm |
Displacement | 146 in³ / 2.4 l |
Stroke | 4 in / 102.4 mm |
Emissions | *Meets U.S. EPA Tier 4 Final/EU Stage IIIA emission standards. |
Gross Power - ISO 14396 | 41.8 HP / 31.2 kW |
Weights* | |
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Operating Weight | 8996 lb / 4080 kg |
Weight - Canopy, Standard Stick | 8655 lb / 3925 kg |
Note | *Weight includes counterweight, rubber tracks, bucket, operator, full fuel and auxiliary lines. |
Weight - Cab, Long Stick | 8996 lb / 4080 kg |
Weight - Cab, Standard Stick | 8930 lb / 4050 kg |
Weight - Canopy, Long Stick | 8721 lb / 3955 kg |
Travel System | |
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Maximum Traction Force - High Speed | 3799 lb / 16.9 kN |
Maximum Traction Force - Low Speed | 6969 lb / 31 kN |
Travel Speed - High | 3.2 mile/h / 5.2 km/h |
Travel Speed - Low | 2.1 mile/h / 3.3 km/h |
Gradeability - Maximum | 30° |
Ground Pressure - Cab | 4.3 psi / 29.5 kPa |
Ground Pressure - Canopy | 4.1 psi / 28.1 kPa |
Hydraulic System | |
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Auxiliary Circuit - Primary (186 bar/2,734 psi) | 18.5 gal/min / 70 l/min |
Auxiliary Circuit - Secondary (174 bar/2,524 psi) | 6.6 gal/min / 25 l/min |
Digging Force - Stick - Long | 4384 lb / 19.5 kN |
Digging Force - Stick - Standard | 4856 lb / 21.6 kN |
Operating Pressure - Equipment | 3553 psi / 245 bar |
Operating Pressure - Swing | 3132 psi / 216 bar |
Operating Pressure - Travel | 3553 psi / 245 bar |
Pump Flow at 2,200 rpm | 26.4 gal/min / 100 l/min |
Digging Force - Bucket | 8498 lb / 37.8 kN |
Type | Load Sensing Hydraulics with Variable Displacement Piston Pump |
Swing System | |
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Machine Swing Speed | 10 r/min |
Boom Swing - Left - With Stop* | 55° |
Boom Swing - Left - Without Stop* | 70° |
Boom Swing - Right | 50° |
Note | *Automatic swing brake, spring applied, hydraulic release. |
Blade | |
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Width | 76.8 in / 1950 mm |
Height | 12.8 in / 325 mm |
Dig Depth | 18.5 in / 470 mm |
Lift Height | 15.7 in / 400 mm |
Service Refill Capacities | |
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Cooling System | 1.5 gal (US) / 5.5 l |
Engine Oil | 2.5 gal (US) / 9.5 l |
Hydraulic Tank | 11.2 gal (US) / 42.3 l |
Fuel Tank | 12.2 gal (US) / 46 l |
Hydraulic System | 17.2 gal (US) / 65 l |
Air Conditioning System | |
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Air Conditioning | The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1.0 kg of refrigerant which has a CO2 equivalent of 1.4 metric tonnes. |
Cab | |
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Dynamic Operator Sound Pressure Level (ISO 6396:2008) | 81 dB(A) |
Exterior Sound Power Level - ISO 6395:2008* | 96 dB(A) |
Note | *European Union Directive “2000/14/EC” |
Certification - Cab and Canopy | |
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Roll Over Protective Structure (ROPS) | ISO 12117-2 |
Tip Over Protective Structure (TOPS) | ISO 12117 |
Top Guard | ISO 10262 (Level I) |
Dimensions - Long Stick | |
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Boom Height - Shipping Position | 70 in / 1770 mm |
Boom In Reach | 87 in / 2220 mm |
Boom Swing - Left | 26 in / 670 mm |
Boom Swing - Right | 29 in / 735 mm |
Dig Depth | 135 in / 3430 mm |
Maximum Blade Depth | 19 in / 470 mm |
Maximum Blade Height | 16 in / 400 mm |
Maximum Dig Height | 200 in / 5070 mm |
Maximum Dump Clearance | 145 in / 3690 mm |
Maximum Reach | 220 in / 5590 mm |
Maximum Reach - Ground Level | 215 in / 5470 mm |
O/A Shipping Height | 98 in / 2500 mm |
O/A Shipping Length | 194 in / 4930 mm |
O/A Track Width | 77 in / 1950 mm |
O/A Undercarriage Length | 87 in / 2220 mm |
Swing Bearing - Height | 22 in / 565 mm |
Tail Swing | 38 in / 975 mm |
Track Belt/Shoe Width | 14 in / 350 mm |
Vertical Wall | 101 in / 2560 mm |
Dimensions - Standard Stick | |
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Boom Height - Shipping Position | 58 in / 1480 mm |
Boom In Reach | 83 in / 2110 mm |
Boom Swing - Left | 26 in / 670 mm |
Boom Swing - Right | 29 in / 735 mm |
Dig Depth | 123 in / 3130 mm |
Maximum Blade Depth | 19 in / 470 mm |
Maximum Blade Height | 16 in / 400 mm |
Maximum Dig Height | 196 in / 4980 mm |
Maximum Dump Clearance | 141 in / 3590 mm |
Maximum Reach | 211 in / 5350 mm |
Maximum Reach - Ground Level | 206 in / 5220 mm |
O/A Shipping Height | 98 in / 2500 mm |
O/A Shipping Length | 190 in / 4820 mm |
O/A Track Width | 77 in / 1950 mm |
O/A Undercarriage Length | 87 in / 2220 mm |
Swing Bearing - Height | 22 in / 565 mm |
Tail Swing | 38 in / 975 mm |
Track Belt/Shoe Width | 14 in / 350 mm |
Vertical Wall | 95 in / 2420 mm |
Lift Capacities at Ground Level - Lift Point Radius: 3000 mm (118 in) | |
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Blade Down - Front | 3462 lb / 1570 kg |
Blade Down - Side | 2007 lb / 910 kg |
Blade Up - Front | 1808 lb / 820 kg |
Blade Up - Side | 1808 lb / 820 kg |
Lift Capacities at Ground Level - Lift Point Radius: 4500 mm (177 in) | |
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Blade Down - Front | 1896 lb / 860 kg |
Blade Down - Side | 1058 lb / 480 kg |
Blade Up - Front | 948 lb / 430 kg |
Blade Up - Side | 948 lb / 430 kg |
Operating Specifications | |
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Machine Overhang | 0 in / 0 mm |
Stick Length - Long | 64 in / 1615 mm |
Stick Length - Standard | 52 in / 1315 mm |
Undercarriage | |
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Number of Carrier Rollers | 1 |
Number of Track Rollers | 4 |
Track Roller Type | Center Flange |
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