304E2 CR

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.


SPECIFICATIONS
Engine
Engine Model Cat® C2.4
Net Power 40.2 HP
Rated Net Power - 2,200 rpm - ISO 9249/EEC 80/1269 40.2 HP


Weights*
Operating Weight 8996 lb
Weight - Canopy, Standard Stick 8655 lb


Engine
Bore 3.4 in
Displacement 146 in³
Stroke 4 in


Travel System
Maximum Traction Force - High Speed 3799 lb
Maximum Traction Force - Low Speed 6969 lb
Travel Speed - High 3.2 mile/h
Travel Speed - Low 2.1 mile/h


Hydraulic System
Auxiliary Circuit - Primary (186 bar/2,734 psi) 18.5 gal/min
Auxiliary Circuit - Secondary (174 bar/2,524 psi) 6.6 gal/min
Digging Force - Stick - Long 4384 lb
Digging Force - Stick - Standard 4856 lb
Operating Pressure - Equipment 3553 psi
Operating Pressure - Swing 3132 psi
Operating Pressure - Travel 3553 psi
Pump Flow at 2,200 rpm 26.4 gal/min


Swing System
Machine Swing Speed 10 r/min
Boom Swing - Left - With Stop* 55°
Boom Swing - Left - Without Stop* 70°
Boom Swing - Right 50°


Blade
Width 76.8 in
Height 12.8 in
Dig Depth 18.5 in
Lift Height 15.7 in


Service Refill Capacities
Cooling System 1.5 gal (US)
Engine Oil 2.5 gal (US)
Hydraulic Tank 11.2 gal (US)
Fuel Tank 12.2 gal (US)
Hydraulic System 17.2 gal (US)


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.


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


Dimensions - Long Stick
Boom Height - Shipping Position 70 in
Boom In Reach 87 in
Boom Swing - Left 26 in
Boom Swing - Right 29 in
Dig Depth 135 in
Maximum Blade Depth 19 in
Maximum Blade Height 16 in
Maximum Dig Height 200 in
Maximum Dump Clearance 145 in
Maximum Reach 220 in
Maximum Reach - Ground Level 215 in
O/A Shipping Height 98 in
O/A Shipping Length 194 in
O/A Track Width 77 in
O/A Undercarriage Length 87 in
Swing Bearing - Height 22 in
Tail Swing 38 in
Track Belt/Shoe Width 14 in
Vertical Wall 101 in


Dimensions - Standard Stick
Boom Height - Shipping Position 58 in
Boom In Reach 83 in
Boom Swing - Left 26 in
Boom Swing - Right 29 in
Dig Depth 123 in
Maximum Blade Depth 19 in
Maximum Blade Height 16 in
Maximum Dig Height 196 in
Maximum Dump Clearance 141 in
Maximum Reach 211 in
Maximum Reach - Ground Level 206 in
O/A Shipping Height 98 in
O/A Shipping Length 190 in
O/A Track Width 77 in
O/A Undercarriage Length 87 in
Swing Bearing - Height 22 in
Tail Swing 38 in
Track Belt/Shoe Width 14 in
Vertical Wall 95 in


Engine
Emissions *Meets U.S. EPA Tier 4 Final/EU Stage IIIA emission standards.
Gross Power - ISO 14396 41.8 HP


Hydraulic System
Digging Force - Bucket 8498 lb
Type Load Sensing Hydraulics with Variable Displacement Piston Pump


Lift Capacities at Ground Level - Lift Point Radius: 3000 mm (118 in)
Blade Down - Front 3462 lb
Blade Down - Side 2007 lb
Blade Up - Front 1808 lb
Blade Up - Side 1808 lb


Lift Capacities at Ground Level - Lift Point Radius: 4500 mm (177 in)
Blade Down - Front 1896 lb
Blade Down - Side 1058 lb
Blade Up - Front 948 lb
Blade Up - Side 948 lb


Operating Specifications
Machine Overhang 0 in
Stick Length - Long 64 in
Stick Length - Standard 52 in


Swing System
Note *Automatic swing brake, spring applied, hydraulic release.


Travel System
Gradeability - Maximum 30°
Ground Pressure - Cab 4.3 psi
Ground Pressure - Canopy 4.1 psi


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


Weights*
Note *Weight includes counterweight, rubber tracks, bucket, operator, full fuel and auxiliary lines.
Weight - Cab, Long Stick 8996 lb
Weight - Cab, Standard Stick 8930 lb
Weight - Canopy, Long Stick 8721 lb


BENEFITS & FEATURES
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.

EQUIPMENT
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™

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

HOW CAN WE HELP?
SHARE YOUR FEEDBACK OR ASK A QUESTION
Feel free to ask a question or share a comment about the information on this page.

To help us answer your question or respond to your comment, please enter your email address.