Mini Excavators 304E2 CR Big Performance in a Mini Excavator

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304E2 CR
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304E2 CR

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Overview

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.

Features At A Glance

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, 50 hour grease interval on front implement, S·O·S^SM oil sampling valve and overall long term durability.

SAFETY

All Cat Mini Excavators from 3.5 metric tons to 10 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).

Full Specifications Standard Equipment Optional Equipment

Product Specifications for 304E2 CR

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US
Metric

Engine

Net Power	40.2 HP 30 kW
Engine Model	Cat C2.4 Cat C2.4
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. 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 30 kW
Displacement	146 in³ 2.4 l
Stroke	4 in 102.4 mm
Bore	3.4 in 87 mm
Gross Power - ISO 14396	41.8 HP 31.2 kW

Weights*

Operating Weight	8996 lb 4080 kg
Weight - Canopy, Standard Stick	8655 lb 3925 kg
Weight - Canopy, Long Stick	8721 lb 3955 kg
Weight - Cab, Long Stick	8996 lb 4080 kg
Weight - Cab, Standard Stick	8930 lb 4050 kg

Travel System

Maximum Traction Force - High Speed	3799 lb 16.9 kN
Maximum Traction Force - Low Speed	6969 lb 31 kN
Travel Speed - High	3.2 mile/h 5.2 km/h
Travel Speed - Low	2.1 mile/h 3.3 km/h
Ground Pressure - Canopy	4.1 psi 28.1 kPa
Ground Pressure - Cab	4.3 psi 29.5 kPa

Hydraulic System

Digging Force - Stick - Long	4384 lb 19.5 kN
Note	Flow and pressure are not combinable. Under load, as flow rises pressure goes down. Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Digging Force - Stick - Standard	4856 lb 21.6 kN
Operating Pressure - Travel	3553 psi 245 bar
Operating Pressure - Equipment	3553 psi 245 bar
Operating Pressure - Swing	3132 psi 216 bar
Pump Flow at 2,200 rpm	26.4 gal/min 100 l/min
Maximum Auxiliary Circuit - Secondary - Flow at Pump	6.6 gal/min 25 l/min
Maximum Auxiliary Circuit - Primary - Flow at Pump	17.2 gal/min 65 l/min
Maximum Auxiliary Circuit - Primary - Pressure at Pump	3553 psi 24500 kPa
Maximum Auxiliary Circuit - Secondary - Pressure at Pump	3553 psi 24500 kPa
Digging Force - Bucket	8498 lb 37.8 kN

Swing System

Machine Swing Speed

10 r/min 10 r/min

Blade

Width	76.8 in 1950 mm
Height	12.8 in 325 mm
Dig Depth	18.5 in 470 mm
Lift Height	15.7 in 400 mm

Service Refill Capacities

Cooling System	1.5 gal (US) 5.5 l
Engine Oil	2.5 gal (US) 9.5 l
Hydraulic Tank	11.2 gal (US) 42.3 l
Fuel Tank	12.2 gal (US) 46 l
Hydraulic System	17.2 gal (US) 65 l

Dimensions - Long Stick

Dig Depth	135 in 3430 mm
Maximum Dig Height	200 in 5070 mm
Maximum Reach	220 in 5590 mm
Vertical Wall	101 in 2560 mm
O/A Shipping Height	98 in 2500 mm
Boom Swing - Right	29 in 735 mm
Maximum Blade Depth	19 in 470 mm
O/A Track Width	77 in 1950 mm
Maximum Dump Clearance	145 in 3690 mm
Swing Bearing - Height	22 in 565 mm
Boom Height - Shipping Position	70 in 1770 mm
Track Belt/Shoe Width	14 in 350 mm
O/A Shipping Length	194 in 4930 mm
Maximum Reach - Ground Level	215 in 5470 mm
O/A Undercarriage Length	87 in 2220 mm
Maximum Blade Height	16 in 400 mm
Tail Swing	38 in 975 mm
Boom Swing - Left	26 in 670 mm
Boom In Reach	87 in 2220 mm

Dimensions - Standard Stick

Maximum Dig Height	196 in 4980 mm
Swing Bearing - Height	22 in 565 mm
Maximum Dump Clearance	141 in 3590 mm
Boom Swing - Left	26 in 670 mm
Boom In Reach	83 in 2110 mm
Maximum Blade Depth	19 in 470 mm
O/A Shipping Height	98 in 2500 mm
Maximum Reach	211 in 5350 mm
Vertical Wall	95 in 2420 mm
Maximum Reach - Ground Level	206 in 5220 mm
Track Belt/Shoe Width	14 in 350 mm
Maximum Blade Height	16 in 400 mm
O/A Track Width	77 in 1950 mm
Boom Height - Shipping Position	58 in 1480 mm
O/A Undercarriage Length	87 in 2220 mm
Dig Depth	123 in 3130 mm
Tail Swing	38 in 975 mm
O/A Shipping Length	190 in 4820 mm
Boom Swing - Right	29 in 735 mm

Operating Specifications

Stick Length - Long	64 in 1615 mm
Machine Overhang	0 in 0 mm
Stick Length - Standard	52 in 1315 mm

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

Blade Up - Side	1808 lb 820 kg
Blade Down - Side	2007 lb 910 kg
Blade Up - Front	1808 lb 820 kg
Blade Down - Front	3462 lb 1570 kg

Cab

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

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

Blade Up - Front	948 lb 430 kg
Blade Down - Side	1058 lb 480 kg
Blade Down - Front	1896 lb 860 kg
Blade Up - Side	948 lb 430 kg

304E2 CR Standard Equipment

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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™

304E2 CR Optional Equipment

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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

See how 304E2 CR compares against frequently compared products.

US
Metric

Excavators 304E2 CR

304E2 CR

Net Power: 40.2 HP; 30 kW
Operating Weight: 8996 lb; 4080 kg
Dig Depth: 135 in; 3430 mm

Selected Model

Excavators 303.5E CR

303.5E CR

Engine Model: Cat® C1.8; Cat® C1.8
Net Power: 31.6 HP; 23.6 kW
Operating Weight: 7734 lb; 3508 kg

Model Details

Excavators 305E2 CR

305E2 CR

Net Power: 40.2 HP; 30 kW
Operating Weight: 11443 lb; 5185 kg
Dig Depth: 144 in; 3670 mm

Model Details

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My.Cat.Com is the web-based hub for digital equipment management, giving you an easy way to take in complex information. Monitor cost, utilization, reliability, age information and other critical data needed to run a business more efficiently and effectively. Access your equipment information and connect with your Cat dealer – all in one place.

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