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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

  • Net Power 40.2 HP 30.0 kW
  • Engine Model Cat C2.4 Cat C2.4
  • Note The Cat C2.4 meets U.S. EPA Tier 4 Final emission standards for North America, EU Stage V emission standards for Europe and Tier 4 Interim emission standards for all other regions. The Cat C2.4 meets U.S. EPA Tier 4 Final emission standards for North America, EU Stage V emission standards for Europe and Tier 4 Interim emission standards for all other regions.
  • Net Power - 2,200 rpm - ISO 9249/EEC 80/1269 40.2 HP 30.0 kW
  • Displacement 146.0 in³ 2.4 l
  • Stroke 4.0 in 102.4 mm
  • Bore 3.4 in 87.0 mm
  • Gross Power - ISO 14396 41.8 HP 31.2 kW

Weights*

  • Operating Weight 8996.0 lb 4080.0 kg
  • Weight - Canopy, Standard Stick 8655.0 lb 3925.0 kg
  • Weight - Canopy, Long Stick 8721.0 lb 3955.0 kg
  • Weight - Cab, Long Stick 8996.0 lb 4080.0 kg
  • Weight - Cab, Standard Stick 8930.0 lb 4050.0 kg

Travel System

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

Hydraulic System

  • Digging Force - Stick - Long 4384.0 lb 19.5 kN
  • 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.
  • Digging Force - Stick - Standard 4856.0 lb 21.6 kN
  • Operating Pressure - Travel 3553.0 psi 245.0 bar
  • Operating Pressure - Equipment 3553.0 psi 245.0 bar
  • Operating Pressure - Swing 3132.0 psi 216.0 bar
  • Pump Flow at 2,200 rpm 26.4 gal/min 100.0 l/min
  • Maximum Auxiliary Circuit - Secondary - Flow at Pump 6.6 gal/min 25.0 l/min
  • Maximum Auxiliary Circuit - Primary - Flow at Pump 17.2 gal/min 65.0 l/min
  • Maximum Auxiliary Circuit - Primary - Pressure at Pump 3553.0 psi 24500.0 kPa
  • Maximum Auxiliary Circuit - Secondary - Pressure at Pump 3553.0 psi 24500.0 kPa
  • Digging Force - Bucket 8498.0 lb 37.8 kN

Swing System

  • Machine Swing Speed 10.0 r/min 10.0 r/min

Blade

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

Service Refill Capacities

  • 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) 46.0 l
  • Hydraulic System 17.2 gal (US) 65.0 l

Dimensions - Long Stick

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

Dimensions - Standard Stick

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

Operating Specifications

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

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

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

Cab

  • Dynamic Operator Sound Pressure Level (ISO 6396:2008) 81.0 dB(A) 81.0 dB(A)
  • Exterior Sound Power Level - ISO 6395:2008* 96.0 dB(A) 96.0 dB(A)

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

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

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

Convenient service and maintenance requirements include ease of access to daily check points, 500 hour engine oil and filter change period, 50 hour grease interval on front implement, S·O·SSM oil sampling valve and overall long term durability.

SAFETY

All Cat Mini Excavators from 3.5 metric tons to 10 metric tons are ROPS, TOPS and Top Guard Level 1 certified and include the Cat Interlock (hydraulic lockout) System, a certified accumulator which allows for auxiliary pressure to be released, making connecting and disconnecting work tools safer and easier, and a travel alarm. All of these safety features are standard on the E2 model lineup (travel alarm optional in Europe).

304E2 CR Standard Equipment

ENGINE

  • Cat C2.4 diesel engine (meets U.S. EPA Tier 4 Final emission standards for North America, EU Stage V emission standards for Europe and 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

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