304E2 CR Mini Hydraulic Excavator

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.

Engine Model
Cat® C2.4
Net Power
40.2 hp
Weight – Canopy, Standard Stick
8655 lb
Rated Net Power @ 2,200 rpm – ISO 9249/EEC 80/1269
40.2 hp

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
Emissions
*Meets U.S. EPA Tier 4 Final/EU Stage IIIA emission standards.
Gross Power - ISO 14396
41.8HP
Gross Power – ISO 14396
41.8hp
Emissions
*Meets U.S. EPA Tier 4 Final/EU Stage IIIA emission standards.
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
Displacement
146in³
Stroke
4in

Weights*

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

Hydraulic System

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

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.
Note
*Automatic swing brake, spring applied, hydraulic release.
Machine Swing Speed
10r/min
Boom Swing - Left - With Stop*
55°
Boom Swing - Left - Without Stop*
70°
Boom Swing - Right
50°

Blade

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

Service Refill Capacities

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

Travel System

Travel Speed – High
3.2mph
Travel Speed – Low
2.1mph
Gradeability - Maximum
30°
Ground Pressure - Cab
4.3psi
Ground Pressure - Canopy
4.1psi
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°
Travel Speed - High
3.2mile/h
Travel Speed - Low
2.1mile/h

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”
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)

Dimensions - Long Stick

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

Dimensions - Standard Stick

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

Operating Specifications

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

Undercarriage

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

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)

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

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.
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.

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