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304E2 CR Mini Hydraulic Excavator
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
Convenient service and maintenance requirements include ease of access to daily check points, 500 hour engine oil and filter change period, 500 hour grease interval on front implement, S·O·SSM oil sampling valve and overall long term durability.
SAFETY
All Cat Mini Excavators from 3.5 metric tons to 8 metric tons are ROPS, TOPS and Top Guard Level 1 certified and include the Cat Interlock (hydraulic lockout) System, a certified accumulator which allows for auxiliary pressure to be released, making connecting and disconnecting work tools safer and easier, and a travel alarm. All of these safety features are standard on the E2 model lineup (travel alarm optional in Europe).
| Engine | |
|---|---|
| Net Power | 30 kW (40.2 HP) |
| Rated Net Power - 2,200 rpm - ISO 9249/EEC 80/1269 | 30 kW (40.2 HP) |
| Weights* | |
|---|---|
| Operating Weight | 4080 kg (8996 lb) |
| Weight - Canopy, Standard Stick | 3925 kg (8655 lb) |
| Engine | |
|---|---|
| Displacement | 2.4 l (146 inu00b3) |
| Stroke | 102.4 mm (4 in) |
| Bore | 87 mm (3.4 in) |
| Travel System | |
|---|---|
| Maximum Traction Force - High Speed | 16.9 kN (3799 lb) |
| Maximum Traction Force - Low Speed | 31 kN (6969 lb) |
| Travel Speed - High | 5.2 km/h (3.2 mile/h) |
| Travel Speed - Low | 3.3 km/h (2.1 mile/h) |
| Hydraulic System | |
|---|---|
| Digging Force - Stick - Long | 19.5 kN (4384 lb) |
| Digging Force - Stick - Standard | 21.6 kN (4856 lb) |
| Auxiliary Circuit - Primary (186 bar/2,734 psi) | 70 l/min (18.5 gal/min) |
| Operating Pressure - Travel | 245 bar (3553 psi) |
| Operating Pressure - Equipment | 245 bar (3553 psi) |
| Operating Pressure - Swing | 216 bar (3132 psi) |
| Auxiliary Circuit - Secondary (174 bar/2,524 psi) | 25 l/min (6.6 gal/min) |
| Pump Flow at 2,200 rpm | 100 l/min (26.4 gal/min) |
| Swing System | |
|---|---|
| Machine Swing Speed | 10 r/min (10 r/min) |
| Blade | |
|---|---|
| Width | 1950 mm (76.8 in) |
| Height | 325 mm (12.8 in) |
| Dig Depth | 470 mm (18.5 in) |
| Lift Height | 400 mm (15.7 in) |
| Service Refill Capacities | |
|---|---|
| Cooling System | 5.5 l (1.5 gal (US)) |
| Engine Oil | 9.5 l (2.5 gal (US)) |
| Hydraulic Tank | 42.3 l (11.2 gal (US)) |
| Fuel Tank | 46 l (12.2 gal (US)) |
| Hydraulic System | 65 l (17.2 gal (US)) |
| Dimensions - Long Stick | |
|---|---|
| Dig Depth | 3430 mm (135 in) |
| Dimensions - Standard Stick | |
|---|---|
| Maximum Dig Height | 4980 mm (196 in) |
| Swing Bearing - Height | 565 mm (22 in) |
| Operating Specifications | |
|---|---|
| Stick Length - Long | 1615 mm (64 in) |
| Dimensions - Long Stick | |
|---|---|
| Maximum Dig Height | 5070 mm (200 in) |
| Hydraulic System | |
|---|---|
| Digging Force - Bucket | 37.8 kN (8498 lb) |
| Dimensions - Long Stick | |
|---|---|
| Maximum Reach | 5590 mm (220 in) |
| Dimensions - Standard Stick | |
|---|---|
| Maximum Dump Clearance | 3590 mm (141 in) |
| Weights* | |
|---|---|
| Weight - Canopy, Long Stick | 3955 kg (8721 lb) |
| Lift Capacities at Ground Level - Lift Point Radius: 3000 mm (118 in) | |
|---|---|
| Blade Up - Side | 820 kg (1808 lb) |
| Blade Down - Side | 910 kg (2007 lb) |
| Cab | |
|---|---|
| Dynamic Operator Sound Pressure Level (ISO 6396:2008) | 81 dB(A) (81 dB(A)) |
| Dimensions - Long Stick | |
|---|---|
| Vertical Wall | 2560 mm (101 in) |
| O/A Shipping Height | 2500 mm (98 in) |
| Lift Capacities at Ground Level - Lift Point Radius: 3000 mm (118 in) | |
|---|---|
| Blade Up - Front | 820 kg (1808 lb) |
| Dimensions - Standard Stick | |
|---|---|
| Boom Swing - Left | 670 mm (26 in) |
| Lift Capacities at Ground Level - Lift Point Radius: 4500 mm (177 in) | |
|---|---|
| Blade Up - Front | 430 kg (948 lb) |
| Dimensions - Standard Stick | |
|---|---|
| Boom In Reach | 2110 mm (83 in) |
| Cab | |
|---|---|
| Exterior Sound Power Level - ISO 6395:2008* | 96 dB(A) (96 dB(A)) |
| Dimensions - Standard Stick | |
|---|---|
| Maximum Blade Depth | 470 mm (19 in) |
| Operating Specifications | |
|---|---|
| Machine Overhang | 0 mm (0 in) |
| Dimensions - Long Stick | |
|---|---|
| Boom Swing - Right | 735 mm (29 in) |
| Travel System | |
|---|---|
| Ground Pressure - Canopy | 28.1 kPa (4.1 psi) |
| Weights* | |
|---|---|
| Weight - Cab, Long Stick | 4080 kg (8996 lb) |
| Dimensions - Long Stick | |
|---|---|
| Maximum Blade Depth | 470 mm (19 in) |
| O/A Track Width | 1950 mm (77 in) |
| Dimensions - Standard Stick | |
|---|---|
| O/A Shipping Height | 2500 mm (98 in) |
| Weights* | |
|---|---|
| Weight - Cab, Standard Stick | 4050 kg (8930 lb) |
| Engine | |
|---|---|
| Gross Power - ISO 14396 | 31.2 kW (41.8 HP) |
| Dimensions - Long Stick | |
|---|---|
| Maximum Dump Clearance | 3690 mm (145 in) |
| Dimensions - Standard Stick | |
|---|---|
| Maximum Reach | 5350 mm (211 in) |
| Vertical Wall | 2420 mm (95 in) |
| Maximum Reach - Ground Level | 5220 mm (206 in) |
| Dimensions - Long Stick | |
|---|---|
| Swing Bearing - Height | 565 mm (22 in) |
| Boom Height - Shipping Position | 1770 mm (70 in) |
| Lift Capacities at Ground Level - Lift Point Radius: 3000 mm (118 in) | |
|---|---|
| Blade Down - Front | 1570 kg (3462 lb) |
| Dimensions - Long Stick | |
|---|---|
| Track Belt/Shoe Width | 350 mm (14 in) |
| O/A Shipping Length | 4930 mm (194 in) |
| Maximum Reach - Ground Level | 5470 mm (215 in) |
| O/A Undercarriage Length | 2220 mm (87 in) |
| Lift Capacities at Ground Level - Lift Point Radius: 4500 mm (177 in) | |
|---|---|
| Blade Down - Side | 480 kg (1058 lb) |
| Dimensions - Long Stick | |
|---|---|
| Maximum Blade Height | 400 mm (16 in) |
| Lift Capacities at Ground Level - Lift Point Radius: 4500 mm (177 in) | |
|---|---|
| Blade Down - Front | 860 kg (1896 lb) |
| Dimensions - Long Stick | |
|---|---|
| Tail Swing | 975 mm (38 in) |
| Dimensions - Standard Stick | |
|---|---|
| Track Belt/Shoe Width | 350 mm (14 in) |
| Dimensions - Long Stick | |
|---|---|
| Boom Swing - Left | 670 mm (26 in) |
| Dimensions - Standard Stick | |
|---|---|
| Maximum Blade Height | 400 mm (16 in) |
| Lift Capacities at Ground Level - Lift Point Radius: 4500 mm (177 in) | |
|---|---|
| Blade Up - Side | 430 kg (948 lb) |
| Operating Specifications | |
|---|---|
| Stick Length - Standard | 1315 mm (52 in) |
| Dimensions - Standard Stick | |
|---|---|
| O/A Track Width | 1950 mm (77 in) |
| Dimensions - Long Stick | |
|---|---|
| Boom In Reach | 2220 mm (87 in) |
| Travel System | |
|---|---|
| Ground Pressure - Cab | 29.5 kPa (4.3 psi) |
| Dimensions - Standard Stick | |
|---|---|
| Boom Height - Shipping Position | 1480 mm (58 in) |
| O/A Undercarriage Length | 2220 mm (87 in) |
| Dig Depth | 3130 mm (123 in) |
| Tail Swing | 975 mm (38 in) |
| O/A Shipping Length | 4820 mm (190 in) |
| Boom Swing - Right | 735 mm (29 in) |
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
- Cab:
- 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