Excavators 304E2 CR Big Performance in a Mini Excavator

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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.
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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.
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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.
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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.
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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.
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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).
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1 - of items

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.

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.

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.

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.

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.

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).

Full Specifications Standard Equipment Optional Equipment

Product Specifications for 304E2 CR

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US
Metric

Engine

Net Power	40.2 HP 30.0 kW
Rated Net Power - 2,200 rpm - ISO 9249/EEC 80/1269	40.2 HP 30.0 kW
Displacement	146.0 in³ 2.4 l
Stroke	4.0 in 102.4 mm
Bore	3.4 in 87.0 mm
Gross Power - ISO 14396	41.8 HP 31.2 kW

Weights*

Operating Weight	8996.0 lb 4080.0 kg
Weight - Canopy, Standard Stick	8655.0 lb 3925.0 kg
Weight - Canopy, Long Stick	8721.0 lb 3955.0 kg
Weight - Cab, Long Stick	8996.0 lb 4080.0 kg
Weight - Cab, Standard Stick	8930.0 lb 4050.0 kg

Travel System

Maximum Traction Force - High Speed	3799.0 lb 16.9 kN
Maximum Traction Force - Low Speed	6969.0 lb 31.0 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	4384.0 lb 19.5 kN
Digging Force - Stick - Standard	4856.0 lb 21.6 kN
Auxiliary Circuit - Primary (186 bar/2,734 psi)	18.5 gal/min 70.0 l/min
Operating Pressure - Travel	3553.0 psi 245.0 bar
Operating Pressure - Equipment	3553.0 psi 245.0 bar
Operating Pressure - Swing	3132.0 psi 216.0 bar
Auxiliary Circuit - Secondary (174 bar/2,524 psi)	6.6 gal/min 25.0 l/min
Pump Flow at 2,200 rpm	26.4 gal/min 100.0 l/min
Digging Force - Bucket	8498.0 lb 37.8 kN

Swing System

Machine Swing Speed

10.0 r/min 10.0 r/min

Blade

Width	76.8 in 1950.0 mm
Height	12.8 in 325.0 mm
Dig Depth	18.5 in 470.0 mm
Lift Height	15.7 in 400.0 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) 46.0 l
Hydraulic System	17.2 gal (US) 65.0 l

Dimensions - Long Stick

Dig Depth	135.0 in 3430.0 mm
Maximum Dig Height	200.0 in 5070.0 mm
Maximum Reach	220.0 in 5590.0 mm
Vertical Wall	101.0 in 2560.0 mm
O/A Shipping Height	98.0 in 2500.0 mm
Boom Swing - Right	29.0 in 735.0 mm
Maximum Blade Depth	19.0 in 470.0 mm
O/A Track Width	77.0 in 1950.0 mm
Maximum Dump Clearance	145.0 in 3690.0 mm
Swing Bearing - Height	22.0 in 565.0 mm
Boom Height - Shipping Position	70.0 in 1770.0 mm
Track Belt/Shoe Width	14.0 in 350.0 mm
O/A Shipping Length	194.0 in 4930.0 mm
Maximum Reach - Ground Level	215.0 in 5470.0 mm
O/A Undercarriage Length	87.0 in 2220.0 mm
Maximum Blade Height	16.0 in 400.0 mm
Tail Swing	38.0 in 975.0 mm
Boom Swing - Left	26.0 in 670.0 mm
Boom In Reach	87.0 in 2220.0 mm

Dimensions - Standard Stick

Maximum Dig Height	196.0 in 4980.0 mm
Swing Bearing - Height	22.0 in 565.0 mm
Maximum Dump Clearance	141.0 in 3590.0 mm
Boom Swing - Left	26.0 in 670.0 mm
Boom In Reach	83.0 in 2110.0 mm
Maximum Blade Depth	19.0 in 470.0 mm
O/A Shipping Height	98.0 in 2500.0 mm
Maximum Reach	211.0 in 5350.0 mm
Vertical Wall	95.0 in 2420.0 mm
Maximum Reach - Ground Level	206.0 in 5220.0 mm
Track Belt/Shoe Width	14.0 in 350.0 mm
Maximum Blade Height	16.0 in 400.0 mm
O/A Track Width	77.0 in 1950.0 mm
Boom Height - Shipping Position	58.0 in 1480.0 mm
O/A Undercarriage Length	87.0 in 2220.0 mm
Dig Depth	123.0 in 3130.0 mm
Tail Swing	38.0 in 975.0 mm
O/A Shipping Length	190.0 in 4820.0 mm
Boom Swing - Right	29.0 in 735.0 mm

Operating Specifications

Stick Length - Long	64.0 in 1615.0 mm
Machine Overhang	0.0 in 0.0 mm
Stick Length - Standard	52.0 in 1315.0 mm

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

Blade Up - Side	1808.0 lb 820.0 kg
Blade Down - Side	2007.0 lb 910.0 kg
Blade Up - Front	1808.0 lb 820.0 kg
Blade Down - Front	3462.0 lb 1570.0 kg

Cab

Dynamic Operator Sound Pressure Level (ISO 6396:2008)	81.0 dB(A) 81.0 dB(A)
Exterior Sound Power Level - ISO 6395:2008*	96.0 dB(A) 96.0 dB(A)

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

Blade Up - Front	948.0 lb 430.0 kg
Blade Down - Side	1058.0 lb 480.0 kg
Blade Down - Front	1896.0 lb 860.0 kg
Blade Up - Side	948.0 lb 430.0 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 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™

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; 30.0 kW
Operating Weight: 8996.0 lb; 4080.0 kg
Dig Depth: 135.0 in; 3430.0 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: 7734.0 lb; 3508.0 kg

Model Details

Excavators 305E2 CR with Swing Boom

305E2 CR with Swing Boom

Net Power: 40.2 HP; 30.0 kW
Operating Weight: 11443.0 lb; 5185.0 kg
Dig Depth: 144.0 in; 3670.0 mm

Model Details

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Cat® Product Link™ wirelessly connects you to your equipment giving you valuable insight into how your machine or fleet is performing. Information such as location, hours, fuel usage, productivity, idle time, and diagnostic codes are made available through online web applications so that you can make timely, fact-based decisions to maximize efficiency, improve productivity, and lower the cost of owning and operating your fleet. Available with satellite or cellular connectivity.

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