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304E2 CR Mini Hydraulic Excavator

Net Power

40.2 HP

Operating Weight

8,996 lb

Dig Depth

135 in

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SPECIFICATIONS

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.

FULL SPECIFICATIONS

Blade

Width

76.8 in

Height

12.8 in

Dig Depth

18.5 in

Lift Height

15.7 in

Cab

Exterior Sound Power Level - ISO 6395:2008*

96 dB(A)

Dynamic Operator Sound Pressure Level (ISO 6396:2008)

81 dB(A)

Dimensions - Long Stick

Dig Depth

135 in

Boom In Reach

87 in

Maximum Blade Depth

19 in

O/A Shipping Height

98 in

Boom Swing - Right

29 in

Maximum Reach - Ground Level

215 in

O/A Track Width

77 in

Maximum Dump Clearance

145 in

Boom Height - Shipping Position

70 in

Track Belt/Shoe Width

14 in

Swing Bearing - Height

22 in

O/A Shipping Length

194 in

O/A Undercarriage Length

87 in

Maximum Blade Height

16 in

Maximum Dig Height

200 in

Tail Swing

38 in

Boom Swing - Left

26 in

Maximum Reach

220 in

Vertical Wall

101 in

Dimensions - Standard Stick

Maximum Blade Height

16 in

Dig Depth

123 in

Track Belt/Shoe Width

14 in

Boom Height - Shipping Position

58 in

O/A Shipping Length

190 in

O/A Shipping Height

98 in

Boom Swing - Left

26 in

Boom In Reach

83 in

Maximum Reach

211 in

Maximum Blade Depth

19 in

Maximum Reach - Ground Level

206 in

Vertical Wall

95 in

Maximum Dig Height

196 in

Swing Bearing - Height

22 in

Maximum Dump Clearance

141 in

O/A Track Width

77 in

O/A Undercarriage Length

87 in

Tail Swing

38 in

Boom Swing - Right

29 in

Engine

Net Power

40.2 HP

Engine Model

Cat C2.4

Bore

3.4 in

Stroke

4 in

Displacement

146 in³

Gross Power - ISO 14396

41.8 HP

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.

Net Power - 2,200 rpm - ISO 9249/EEC 80/1269

40.2 HP

Hydraulic System

Note

Flow and pressure are not combinable. Under load, as flow rises pressure goes down.

Maximum Auxiliary Circuit - Secondary - Flow at Pump

6.6 gal/min

Operating Pressure - Swing

3,132 psi

Pump Flow at 2,200 rpm

26.4 gal/min

Operating Pressure - Equipment

3,553 psi

Operating Pressure - Travel

3,553 psi

Digging Force - Stick - Standard

4,856 lb

Maximum Auxiliary Circuit - Primary - Flow at Pump

17.2 gal/min

Maximum Auxiliary Circuit - Primary - Pressure at Pump

3,553 psi

Maximum Auxiliary Circuit - Secondary - Pressure at Pump

3,553 psi

Digging Force - Stick - Long

4,384 lb

Digging Force - Bucket

8,498 lb

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

Blade Up - Front

1,808 lb

Blade Down - Front

3,462 lb

Blade Up - Side

1,808 lb

Blade Down - Side

2,007 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

Operating Specifications

Machine Overhang

0 in

Stick Length - Standard

52 in

Stick Length - Long

64 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)

Swing System

Machine Swing Speed

10 r/min

Travel System

Ground Pressure - Canopy

4.1 psi

Travel Speed - Low

2.1 mile/h

Travel Speed - High

3.2 mile/h

Maximum Traction Force - Low Speed

6,969 lb

Maximum Traction Force - High Speed

3,799 lb

Ground Pressure - Cab

4.3 psi

Weights*

Operating Weight

8,996 lb

Weight - Canopy, Standard Stick

8,655 lb

Weight - Cab, Long Stick

8,996 lb

Weight - Cab, Standard Stick

8,930 lb

Weight - Canopy, Long Stick

8,721 lb

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™

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