304E2 CR Mini Hydraulic Excavator

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.

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Engine Model
Cat® C2.4
Net Power
40.2 hp
Operating Weight
8996 lb
Weight – Canopy, Standard Stick
8655 lb

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Product Specs

Engine

Engine Model
Cat® C2.4
Net Power
40.2hp
Rated Net Power @ 2,200 rpm – ISO 9249/EEC 80/1269
40.2hp
Bore
3.4in
Stroke
4in
Displacement
146in3
Gross Power – ISO 14396
41.8hp
Emissions
*Meets U.S. EPA Tier 4 Final/EU Stage IIIA emission standards.

Weights*

Operating Weight
8996lb
Weight – Canopy, Standard Stick
8655lb
Weight – Canopy, Long Stick
8721lb
Weight – Cab, Standard Stick
8930lb
Weight – Cab, Long Stick
8996lb
Note
*Weight includes counterweight, rubber tracks, bucket, operator, full fuel and auxiliary lines.

Hydraulic System

Pump Flow at 2,200 rpm
26.4gal/min
Operating Pressure – Equipment
3553psi
Operating Pressure – Travel
3553psi
Operating Pressure – Swing
3132psi
Auxiliary Circuit – Primary (186 bar/2,734 psi)
18.5gal/min
Auxiliary Circuit – Secondary (174 bar/2,524 psi)
6.6gal/min
Digging Force – Stick (standard)
4856lb
Digging Force – Stick (long)
4384lb
Digging Force – Bucket
8498lb
Type
Load Sensing Hydraulics with Variable Displacement Piston Pump

Swing System

Machine Swing Speed
10rpm
Boom Swing – Left (without stop)*
70°
Boom Swing – Left (with stop)*
55°
Boom Swing – Right
50°
Note
*Automatic swing brake, spring applied, hydraulic release.

Blade

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

Service Refill Capacities

Cooling System
1.5gal
Engine Oil
2.5gal
Hydraulic Tank
11.2gal
Fuel Tank
12.2gal
Hydraulic System
17.2gal

Travel System

Travel Speed – High
3.2mph
Travel Speed – Low
2.1mph
Maximum Traction Force – High Speed
3799lb
Maximum Traction Force – Low Speed
6969lb
Ground Pressure – Canopy
4.1psi
Ground Pressure – Cab
4.3psi
Gradeability (maximum)
30°

Operating Specifications

Stick Length – Standard
52in
Stick Length – Long
64in
Machine Overhang
0in

Cab

Dynamic Operator Sound Pressure Level (ISO 6396:2008)
81dB(A)
Exterior Sound Power Level (ISO 6395:2008)*
96dB(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)

Undercarriage

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

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

Blade Down – Front
3462lb
Blade Up – Front
1808lb
Blade Down – Side
2007lb
Blade Up – Side
1808lb

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

Blade Down – Front
1896lb
Blade Up – Front
948lb
Blade Down – Side
1058lb
Blade Up – Side
948lb

Dimensions – Standard Stick

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

Dimensions – Long Stick

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

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.

Standard/Optional Features

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)

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
  • Technology
    • Product Link