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Excavators

304E2 CR

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Overview

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

Units:
Engine Model Cat® C2.4 Cat® C2.4 Less
Net Power 40.2 HP 30.0 kW Less
Rated Net Power - 2,200 rpm - ISO 9249/EEC 80/1269 40.2 HP 30.0 kW Less
Displacement 146.0 in³ 2.4 l Less
Bore 3.4 in 87.0 mm Less
Stroke 4.0 in 102.4 mm Less
Gross Power - ISO 14396 41.8 HP 31.2 kW Less
Emissions *Meets U.S. EPA Tier 4 Final/EU Stage IIIA emission standards. *Meets U.S. EPA Tier 4 Final/EU Stage IIIA emission standards. Less

Weights*

Weight - Canopy, Standard Stick 8655.0 lb 3925.0 kg Less
Operating Weight 8996.0 lb 4080.0 kg Less
Weight - Cab, Long Stick 8996.0 lb 4080.0 kg Less
Weight - Canopy, Long Stick 8721.0 lb 3955.0 kg Less
Note *Weight includes counterweight, rubber tracks, bucket, operator, full fuel and auxiliary lines. *Weight includes counterweight, rubber tracks, bucket, operator, full fuel and auxiliary lines. Less
Weight - Cab, Standard Stick 8930.0 lb 4050.0 kg Less

Travel System

Travel Speed - High 3.2 mile/h 5.2 km/h Less
Maximum Traction Force - Low Speed 6969.0 lb 31.0 kN Less
Maximum Traction Force - High Speed 3799.0 lb 16.9 kN Less
Travel Speed - Low 2.1 mile/h 3.3 km/h Less
Ground Pressure - Cab 4.3 psi 29.5 kPa Less
Ground Pressure - Canopy 4.1 psi 28.1 kPa Less
Gradeability - Maximum 30° 30° Less

Hydraulic System

Auxiliary Circuit - Secondary (174 bar/2,524 psi) 6.6 gal/min 25.0 l/min Less
Digging Force - Stick - Long 4384.0 lb 19.5 kN Less
Pump Flow at 2,200 rpm 26.4 gal/min 100.0 l/min Less
Operating Pressure - Equipment 3553.0 psi 245.0 bar Less
Auxiliary Circuit - Primary (186 bar/2,734 psi) 18.5 gal/min 70.0 l/min Less
Operating Pressure - Swing 3132.0 psi 216.0 bar Less
Digging Force - Stick - Standard 4856.0 lb 21.6 kN Less
Operating Pressure - Travel 3553.0 psi 245.0 bar Less
Digging Force - Bucket 8498.0 lb 37.8 kN Less
Type Load Sensing Hydraulics with Variable Displacement Piston Pump Load Sensing Hydraulics with Variable Displacement Piston Pump Less

Swing System

Machine Swing Speed 10.0 r/min 10.0 r/min Less
Boom Swing - Right 50° 50° Less
Boom Swing - Left - Without Stop* 70° 70° Less
Boom Swing - Left - With Stop* 55° 55° Less
Note *Automatic swing brake, spring applied, hydraulic release. *Automatic swing brake, spring applied, hydraulic release. Less

Blade

Width 76.8 in 1950.0 mm Less
Height 12.8 in 325.0 mm Less
Dig Depth 18.5 in 470.0 mm Less
Lift Height 15.7 in 400.0 mm Less

Service Refill Capacities

Cooling System 1.5 gal (US) 5.5 l Less
Engine Oil 2.5 gal (US) 9.5 l Less
Hydraulic Tank 11.2 gal (US) 42.3 l Less
Fuel Tank 12.2 gal (US) 46.0 l Less
Hydraulic System 17.2 gal (US) 65.0 l Less

Operating Specifications

Machine Overhang 0.0 in 0.0 mm Less
Stick Length - Standard 52.0 in 1315.0 mm Less
Stick Length - Long 64.0 in 1615.0 mm Less

Dimensions - Long Stick

Boom In Reach 87.0 in 2220.0 mm Less
O/A Track Width 77.0 in 1950.0 mm Less
O/A Shipping Length 194.0 in 4930.0 mm Less
Vertical Wall 101.0 in 2560.0 mm Less
Dig Depth 135.0 in 3430.0 mm Less
Maximum Dump Clearance 145.0 in 3690.0 mm Less
Swing Bearing - Height 22.0 in 565.0 mm Less
Maximum Blade Height 16.0 in 400.0 mm Less
Maximum Blade Depth 19.0 in 470.0 mm Less
O/A Undercarriage Length 87.0 in 2220.0 mm Less
Tail Swing 38.0 in 975.0 mm Less
O/A Shipping Height 98.0 in 2500.0 mm Less
Maximum Reach - Ground Level 215.0 in 5470.0 mm Less
Boom Swing - Right 29.0 in 735.0 mm Less
Maximum Dig Height 200.0 in 5070.0 mm Less
Boom Height - Shipping Position 70.0 in 1770.0 mm Less
Track Belt/Shoe Width 14.0 in 350.0 mm Less
Boom Swing - Left 26.0 in 670.0 mm Less
Maximum Reach 220.0 in 5590.0 mm Less

Dimensions - Standard Stick

Boom Height - Shipping Position 58.0 in 1480.0 mm Less
Boom Swing - Left 26.0 in 670.0 mm Less
O/A Shipping Height 98.0 in 2500.0 mm Less
Maximum Reach 211.0 in 5350.0 mm Less
O/A Undercarriage Length 87.0 in 2220.0 mm Less
Tail Swing 38.0 in 975.0 mm Less
O/A Track Width 77.0 in 1950.0 mm Less
O/A Shipping Length 190.0 in 4820.0 mm Less
Dig Depth 123.0 in 3130.0 mm Less
Vertical Wall 95.0 in 2420.0 mm Less
Maximum Dig Height 196.0 in 4980.0 mm Less
Boom In Reach 83.0 in 2110.0 mm Less
Maximum Dump Clearance 141.0 in 3590.0 mm Less
Swing Bearing - Height 22.0 in 565.0 mm Less
Maximum Reach - Ground Level 206.0 in 5220.0 mm Less
Track Belt/Shoe Width 14.0 in 350.0 mm Less
Boom Swing - Right 29.0 in 735.0 mm Less
Maximum Blade Depth 19.0 in 470.0 mm Less
Maximum Blade Height 16.0 in 400.0 mm Less

Lift Capacities at Ground Level - Lift Point Radius: 3000 mm (118 in)

Blade Down - Side 2007.0 lb 910.0 kg Less
Blade Up - Side 1808.0 lb 820.0 kg Less
Blade Down - Front 3462.0 lb 1570.0 kg Less
Blade Up - Front 1808.0 lb 820.0 kg Less

Lift Capacities at Ground Level - Lift Point Radius: 4500 mm (177 in)

Blade Up - Front 948.0 lb 430.0 kg Less
Blade Down - Front 1896.0 lb 860.0 kg Less
Blade Down - Side 1058.0 lb 480.0 kg Less
Blade Up - Side 948.0 lb 430.0 kg Less

Cab

Dynamic Operator Sound Pressure Level (ISO 6396:2008) 81.0 dB(A) 81.0 dB(A) Less
Note *European Union Directive “2000/14/EC” *European Union Directive “2000/14/EC” Less
Exterior Sound Power Level - ISO 6395:2008* 96.0 dB(A) 96.0 dB(A) Less

Certification - Cab and Canopy

Tip Over Protective Structure (TOPS) ISO 12117 ISO 12117 Less
Top Guard ISO 10262 (Level I) ISO 10262 (Level I) Less
Roll Over Protective Structure (ROPS) ISO 12117-2 ISO 12117-2 Less

Air Conditioning System

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. 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. Less

Undercarriage

Track Roller Type Center Flange Center Flange Less
Number of Carrier Rollers 1 1 Less
Number of Track Rollers 4 4 Less

Attachments

Find the right attachments to fit this machine.

Find
Auger Accessories
102 mm (4 in) 1067 mm (42 in) 1219 mm (48 in) 152 mm (6 in) 229 mm (9 in) 305 mm (12 in) 406 mm (16 in) 457 mm (18 in) 508 mm (20 in) 610 mm (24 in) 762 mm (30 in) 762 mm (30 in) 914 mm (36 in) 914 mm (36 in)
Augers
A14B A14B A19B A19B
Digging Buckets - Mini Excavator
300 mm (12 in) 300 mm (12 in) 400 mm (16 in) 400 mm (16 in) 460 mm (18 in) 460 mm (18 in) 500 mm (20 in) 500 mm (20 in) 600 mm (24 in) 600 mm (24 in) 750 mm (30 in) 750 mm (30 in) 900 mm (35 in)
Ditch Cleaning Buckets - Mini Excavator
1000 mm (40 in) 1200 mm (47 in) 1400 mm (55 in)
Grading Buckets - Mini Excavator
1200 mm (47 in)
Heavy Duty Buckets - Mini Excavator
305 mm (12 in) 406 mm (16 in) 457 mm (18 in) 508 mm (20 in) 619 mm (24 in) 762 mm (30 in) 914 mm (36 in)
Tilting Ditch Cleaning Buckets - Mini Excavator
1200 mm (47 in)
Hammers
B4 B4s B6 B6s
Rippers
490 mm (19 in)

QUALITY

The durable hoods and frame and the compact radius design of the 304E2 let you work comfortably and confidently in confined areas. The operator environment includes a high quality suspension seat, easy to adjust armrests and 100% pilot controls which offer consistent and long-lasting controllability.

EFFICIENCY

High Definition Hydraulic System provides a load sensing and flow sharing capability leading to operational precision, efficient performance and greater controllability. Power on Demand provides optimal efficiency and performance the moment you need it. This automatic system ensures fuel efficiency through appropriate engine rating to meet all operational needs as required.

VERSATILITY

Broad range of Cat Work Tools make the Cat Mini Excavator a versatile machine able to meet the requirements of any job site. Over 200 degrees of bucket rotation provides greater material retention during truck loading and easier flat wall digging without having to reposition the machine.

PERFORMANCE

Front shovel bucket orientation provides the operator with more ways to get the job done faster. COMPASS Control Panel is a standard feature that allows the operator to easily adjust auxiliary flows to achieve the optimal work tool performance, activate auto idle or economy mode for improved fuel efficiency and utilize the security system to ensure protection of valuable assets with the simple touch of a button. The Site Reference System included in the COMPASS monitor provides output from pitch and roll sensors to aid in grading and level trenching. This impacts accuracy and productivity for job site finishing.

SERVICEABILITY

Front shovel bucket orientation provides the operator with more ways to get the job done faster. COMPASS Control Panel is a standard feature that allows the operator to easily adjust auxiliary flows to achieve the optimal work tool performance, activate auto idle or economy mode for improved fuel efficiency and utilize the security system to ensure protection of valuable assets with the simple touch of a button. The Site Reference System included in the COMPASS monitor provides output from pitch and roll sensors to aid in grading and level trenching. This impacts accuracy and productivity for job site finishing.

SAFETY

Front shovel bucket orientation provides the operator with more ways to get the job done faster. COMPASS Control Panel is a standard feature that allows the operator to easily adjust auxiliary flows to achieve the optimal work tool performance, activate auto idle or economy mode for improved fuel efficiency and utilize the security system to ensure protection of valuable assets with the simple touch of a button. The Site Reference System included in the COMPASS monitor provides output from pitch and roll sensors to aid in grading and level trenching. This impacts accuracy and productivity for job site finishing.

304E2 CR Standard Equipment

ENGINE
  • Cat C2.4 diesel engine (meets U.S. EPA Tier 4 Final emission standards for North America and EU Stage IIIA/Tier 4 Interim emission standards for all other regions)
  • Automatic engine idle
  • Automatic engine shut-off
  • Automatic two speed travel
  • Diesel Particulate Filter (North America only)
  • Diesel Oxidation Catalyst (North America only)
  • Fuel and water separator
  • Power on demand

HYDRAULIC SYSTEM
  • 1-way and 2-way (combined function)
  • Accumulator
  • Automatic swing parking brake
  • Auxiliary hydraulic lines
  • Adjustable auxiliary relief
  • Auxiliary line quick disconnects
  • Cat interlock system: hydraulic lockout
  • Continuous auxiliary flow
  • Ecology drain
  • Hydraulic oil cooler
  • High definition hydraulics
  • Load sensing/flow sharing

OPERATOR ENVIRONMENT
  • 100% pilot control ergonomic joysticks
  • Adjustable armrests
  • COMPASS: complete, operation, maintenance, performance and security system
    • Multiple languages
  • Cup holder
  • Hydraulic neutral lockout bar
  • Literature holder
  • Pattern changer (optional in Europe)
  • Site reference system: leveling
  • Tool storage area
  • Travel control pedals with hand levers
  • Washable floor mat

UNDERCARRIAGE
  • Dozer blade with float function
  • Track, rubber belt, 350 mm (14 in) width
  • Tie down eyes on track frame
  • Towing eye on base frame

FRONT LINKAGE
  • 200 degree bucket rotation
  • Certified lifting eye on bucket linkage (optional in Europe)
  • Front shovel capable
  • Thumb ready stick

ELECTRICAL
  • 12 volt electrical system
  • 60 ampere alternator
  • 650 CCA maintenance free battery
  • Fuse box
  • Ignition key start/stop switch
  • Slow blow fuse
  • Warning horn

LIGHTS AND MIRRORS
  • Boom light with time delay capability

SAFETY AND SECURITY
  • Anti-theft system (COMPASS)
  • Caterpillar Corporate “One Key” System
  • Door locks
  • Lockable fuel cap
  • Retractable seat belt
  • Roll Over Protective Structure (ROPS) (ISO 12117-2)
  • Tip Over Protective Structure (TOPS) (ISO 12117)
  • Top guard – ISO 10262 (Level 1)
  • Travel alarm (optional in Europe)

TECHNOLOGY
  • Product Link™

304E2 CR Optional Equipment

ENGINE
  • Engine block heater

HYDRAULIC SYSTEM
  • Quick coupler lines
  • Boom lowering check valve
  • Stick lowering check valve
  • Secondary auxiliary hydraulic lines

OPERATOR ENVIRONMENT
  • Cab:
    • Air conditioning
    • Heat
    • High back suspension seat
    • Interior light
    • Interlocking front window system
    • Radio
    • Windshield wiper

UNDERCARRIAGE
  • Power angle blade
  • Track, double grouser (steel), 350 mm (14 in)

FRONT LINKAGE
  • Quick coupler: manual or hydraulic
  • Thumb
  • Buckets
  • Full range of performance matched work tools
    • Auger, hammer, ripper

LIGHTS AND MIRRORS
  • Light, cab with time delay capability
  • Mirror, canopy right
  • Mirror, canopy left
  • Mirror, cab rear

SAFETY AND SECURITY
  • Battery disconnect
  • Beacon socket
  • Front wire mesh guard
  • Rearview camera
  • Vandal guard