304E2 CR Mini Hydraulic Excavator

Overview
Engine Model
Cat® C2.4
Net Power
40 hp
Weight – Canopy, Standard Stick
8,655 lb

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

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

Weights*

Weight – Canopy, Standard Stick
8,655 lb
Operating Weight
8,996 lb
Weight – Canopy, Long Stick
8,721 lb
Weight – Cab, Standard Stick
8,930 lb
Weight – Cab, Long Stick
8,996 lb
Note
*Weight includes counterweight, rubber tracks, bucket, operator, full fuel and auxiliary lines.
Weight - Canopy, Standard Stick
8,655 lb
Note
*Weight includes counterweight, rubber tracks, bucket, operator, full fuel and auxiliary lines.
Weight - Cab, Long Stick
8,996 lb
Weight - Cab, Standard Stick
8,930 lb
Weight - Canopy, Long Stick
8,721 lb
Note
8,721 lb

Hydraulic System

Pump Flow at 2,200 rpm
26 gal/min
Auxiliary Circuit – Primary (186 bar/2,734 psi)
19 gal/min
Auxiliary Circuit – Secondary (174 bar/2,524 psi)
7 gal/min
Operating Pressure - Equipment
3,553 psi
Operating Pressure - Travel
3,553 psi
Operating Pressure - Swing
3,132 psi
Digging Force - Stick - Standard
4,856 lb
Digging Force - Stick - Long
4,384 lb
Digging Force – Bucket
8,498 lb
Type
Load Sensing Hydraulics with Variable Displacement Piston Pump
Auxiliary Circuit - Primary (186 bar/2,734 psi)
19 gal/min
Auxiliary Circuit - Secondary (174 bar/2,524 psi)
7 gal/min
Pump Flow at 2,200 rpm
26 gal/min
Digging Force - Bucket
8,498 lb
Type
Load Sensing Hydraulics with Variable Displacement Piston Pump

Swing System

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

Blade

Width
77 in
Height
13 in
Dig Depth
19 in
Lift Height
16 in
Width
77 in

Service Refill Capacities

Cooling System
2 gal
Engine Oil
3 gal
Hydraulic Tank
11 gal
Fuel Tank
12 gal
Hydraulic System
17 gal
Cooling System
2 gal (US)
Engine Oil
3 gal (US)
Hydraulic Tank
11 gal (US)
Fuel Tank
12 gal (US)
Hydraulic System
17 gal (US)

Travel System

Travel Speed – High
3 mph
Travel Speed – Low
2 mph
Maximum Traction Force - High Speed
3,799 lb
Maximum Traction Force - Low Speed
6,969 lb
Ground Pressure – Canopy
4 psi
Ground Pressure – Cab
4 psi
Gradeability (maximum)
30°
Travel Speed - High
3 mile/h
Travel Speed - Low
2 mile/h
Gradeability - Maximum
30°
Ground Pressure - Cab
4 psi
Ground Pressure - Canopy
4 psi

Operating Specifications

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

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”
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)

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

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

Blade Down - Front
3,462 lb
Blade Up - Front
1,808 lb
Blade Down - Side
2,007 lb
Blade Up - Side
1,808 lb

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

Blade Down - Front
1,896 lb
Blade Up - Front
948 lb
Blade Down - Side
1,058 lb
Blade Up - Side
948 lb

Dimensions – Standard Stick

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

Dimensions – Long Stick

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

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

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.

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.

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.

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.

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.

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.

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.

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.

  • 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
  • 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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