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Mini Excavators

Caterpillar serves all regions of the world so we build many different configurations of hydraulic excavators. Your Cat® dealer has exact machine specifications available in your area to help you choose what will best meet your needs.

303E CR Mini Hydraulic Excavator

The Cat® 303E CR Mini Hydraulic Excavator delivers high performance, durability and versatility in a compact design to help you work in a variety of applications.

  • Specification Summary

  • Net Power 17.5 kW
  • Engine Model Cat C1.3
  • Gross Power - ISO 14396 18.5 kW
  • Note Cat C1.3 engine meets U.S. EPA Tier 4 Final/EU Stage V emission standards.
  • Product Brochure

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Product Details

Engine

Net Power 17.5 kW
Engine Model Cat C1.3
Gross Power - ISO 14396 18.5 kW
Note Cat C1.3 engine meets U.S. EPA Tier 4 Final/EU Stage V emission standards.
Stroke 88 mm
Bore 78 mm
Displacement 1.3 l
Gross Power 18.5 kW
Rated Net Power - 2,400 rpm - ISO 9249/EEC 80/1269 17.5 kW

Weights

Operating Weight - With Cab 3267 kg
Operating Weight - With Canopy 3048 kg
Note Weight includes counterweight, rubber tracks, bucket, operator, full fuel and auxiliary lines.

Travel System

Maximum Traction Force - Low Speed 30.9 kN
Travel Speed - High 4.5 km/h
Travel Speed - Low 2.4 km/h
Maximum Traction Force - High Speed 15.2 kN
Ground Pressure - Cab Standard Stick 32.6 kPa
Ground Pressure - Cab Long Stick 33 kPa
Ground Pressure with Canopy - Long Stick, Optional Counterweight 33.5 kPa
Ground Pressure - Canopy Standard Stick 30.4 kPa
Gradeability - Continuous Operation 20°
Ground Pressure - Canopy Long Stick 30.8 kPa
Ground Pressure with Canopy - Standard Stick, Optional Counterweight 33 kPa
Ground Pressure with Cab - Standard Stick, Optional Counterweight 35.2 kPa
Ground Pressure with Cab - Long Stick, Optional Counterweight 35.6 kPa

Hydraulic System

Operating Pressure - Swing 181 bar
Digging Force - Bucket 28.4 kN
Pump Flow at 2,400 rpm 88 l/min
Operating Pressure - Travel 245 bar
Digging Force - Stick - Standard 16.6 kN
Operating Pressure - Equipment 245 bar
Type Load Sensing Hydraulics with Variable Displacement Piston Pump
Auxiliary Circuit - Secondary (174 bar/2,523 psi) 27 l/min
Digging Force - Stick - Long 14.8 kN
Auxiliary Circuit - Primary (186 bar/2,697 psi) 60 l/min

Swing System

Machine Swing Speed 9 r/min
Boom Swing - Left* 80°
Boom Swing - Right 50°
Note *Automatic swing brake, spring applied, hydraulic release.

Blade

Width 1550 mm
Height 335 mm
Dig Depth 472 mm
Lift Height 402 mm

Service Refill Capacities

Engine Oil 5.7 l
Fuel Tank 45 l
Hydraulic Tank 47 l
Cooling System 4.7 l
Hydraulic System 65 l

Undercarriage

Number of Carrier Rollers 1
Track Roller Type Center Flange
Number of Track Rollers 4

Certification - Cab and Canopy

Top Guard ISO 10262:1998 (Level I)
Roll Over Protective Structure (ROPS) ISO 12117-2:2008
Tip Over Protective Structure (TOPS) ISO 12117:1997

Dimensions (Approximate) - Long Stick

Dig Depth 2980 mm
Maximum Reach 5040 mm
Track Belt/Shoe Width 300 mm
Overall Undercarriage Length 2080 mm
Overall Shipping Height 2500 mm
Maximum Reach - Ground Level 4910 mm
Tail Swing 775 mm
Vertical Wall 1750 mm
Boom In Reach 2000 mm
Maximum Dig Height 4250 mm
Boom Swing Right 825 mm
Maximum Blade Depth 470 mm
Tail Swing with Extra Counterweight 890 mm
Maximum Blade Height 400 mm
Overall Track Width 1550 mm
Swing Bearing Height 565 mm
Boom Height in Shipping Position 1600 mm
Boom Swing Left 610 mm
Maximum Dump Clearance 2970 mm
Overall Shipping Length 5030 mm

Lift Capacities at Ground Level* - Lift Point Radius: 3000 mm (9'8

Blade Down - Side 540 kg
Blade Down - Front 1170 kg
Blade Up - Side 490 kg
Blade Up - Front 650 kg
Note *The above loads are in compliance with hydraulic excavator lift capacity rating standard ISO 10567:2007 and they do not exceed 87% of hydraulic lifting capacity or 75% of tipping capacity. The excavator bucket weight is not included on this chart. Lifting capacities are for machine with cab, optional counterweight and standard stick.

Operating Specifications

Machine Overhang with Counterweight 115 mm
Machine Overhang 0 mm
Stick Length - Long 1560 mm
Stick Length - Standard 1260 mm

Lift Capacities at Ground Level* - Lift Point Radius: 4000 mm (13'1

Blade Up - Side 300 kg
Blade Down - Front 740 kg
Note *The above loads are in compliance with hydraulic excavator lift capacity rating standard ISO 10567:2007 and they do not exceed 87% of hydraulic lifting capacity or 75% of tipping capacity. The excavator bucket weight is not included on this chart. Lifting capacities are for machine with cab, optional counterweight and standard stick.
Blade Down - Side 340 kg
Blade Up - Front 410 kg

Dimensions (Approximate) - Standard Stick

Tail Swing 775 mm
Maximum Dump Clearance 3150 mm
Track Belt/Shoe Width 300 mm
Overall Track Width 1550 mm
Maximum Dig Height 4530 mm
Dig Depth 2750 mm
Overall Undercarriage Length 2080 mm
Boom Swing Left 610 mm
Boom Swing Right 825 mm
Tail Swing with Extra Counterweight 890 mm
Maximum Blade Height 402 mm
Maximum Blade Depth 472 mm
Boom Height in Shipping Position 1590 mm
Swing Bearing Height 565 mm
Maximum Reach 4950 mm
Overall Shipping Height 2500 mm
Vertical Wall 1960 mm
Overall Shipping Length 4470 mm
Maximum Reach - Ground Level 4810 mm
Boom In Reach 2110 mm

Weights*

Operating Weight with Canopy - Long Stick, Optional Counterweight 3356 kg
Operating Weight with Canopy - Long Stick 3090 kg
Operating Weight with Cab - Standard Stick 3267 kg
Operating Weight with Canopy - Standard Stick 3048 kg
Operating Weight with Cab - Standard Stick, Optional Counterweight 3533 kg
Operating Weight with Cab - Long Stick 3309 kg
Note *Weight includes counterweight, rubber tracks, bucket, operator, full fuel and auxiliary lines.
Operating Weight with Canopy - Standard Stick, Optional Counterweight 3314 kg
Operating Weight with Cab - Long Stick, Optional Counterweight 3575 kg

Solid Performance in a Small Package

Compact and efficient design provides superior power.

Compact Radius

The 303E allows you to easily reposition within a confined space and increase your overall productivity. Proficient movement is enhanced as a result of the limited tailswing and swing boom design.

Transport

With an operating weight of 3200 kg (7,055 lb) and width of 1550 mm (60 in) the 303E is simple to load and position on a trailer with tie down points – getting you to the job site quicker.

Fuel Economy

Powered by the C1.3 engine, the 303E offers the performance and power required for your job with minimal fuel consumption.

Productivity and Durability

Designed for reliability.

Auxiliary Hydraulics

The 303E is ready to work. Hammer and two way lines with quick disconnect fittings are standard on every machine.

The quick disconnects are located close to the tool to reduce hose length and decrease owning and operating costs associated with hose replacement.

Hose routings provide superior protection and cylinder guards decrease opportunity for machine damage.

Thumb Ready Stick

The machine is configured with brackets and relief valves for simple and cost effective mounting of a hydraulic thumb.

Dozer Blade

The durable blade and dozer float function provide the required design and capability to increase overall efficiency. Ground leveling and finishing applications are fast and easy with a single lever controlling all blade operation – up, down and float.

Superior Operating Experience

Safety and comfort all day.

Spacious and Ergonomic Working Environment

Your safety and comfort is incorporated into the design of every Cat machine.

The adjustable suspension seat, retractable seat belt and adjustable wrist rests allow you to customize the operating station to meet your needs. Ergonomically designed joystick control and travel levers reduce fatigue and improve productivity.

An easy to use pattern control selector and informative gauge panel ensure optimal operation.

Cat Interlock System aids in job site safety. When the hydraulic lockout lever is in the up position no operational function is possible – including travel.

Travel alarm as standard safety offering. An audible alarm alerts job site operators of machine travel (optional in Europe).

ROPS/TOPS/TOP GUARD certification ensures the machine is prepared to protect you.

*Cab unit includes sliding door and openable front window/removable lower window.

Simple Service and Maintenance Access

Low cost of ownership.

Easy Maintenance Access and Extended Service Intervals

Ease of access to daily maintenance check points ensures your machine is in prime condition to complete any task.

Engine and hydraulic hoods are simple to open and offer outstanding visibility and convenience to check points.

500 hour engine oil and filter change period reduces operating costs and machine downtime.

Easy access to the engine oil check and fill, vertically mounted engine oil filter, starter motor and alternator, as well as the radiator and oil cooler all result in simplified cleaning and reduced maintenance times.

Unmatched Support and Solutions

Equipment, service and attachments to meet your needs.

Customized Solutions for Any Application

A range of tools is available to take advantage of the machine’s versatility. All tools are matched to the machine to optimize performance and deliver excellent value through high productivity and long life.

Customer Support You Can Count On

Your Cat dealer is ready to assist you with your purchase decision and everything after.

Financing packages are flexible to meet your needs.

Superior parts availability keeps you working.
  • 1-way and 2-way (combined function) auxiliary hydraulic lines
    • Adjustable armrests
      • Alternator
        • Automatic swing park brake
          • Automatic two speed travel
            • Auxiliary line quick disconnects
              • Boom cylinder guard
                • Cab mounted work light
                  • Canopy with Top Guard ISO 10262 (Level 1), ROPS ISO 12117-2 and TOPS ISO 12117
                    • Coat hook
                      • Cup holder
                        • Control pattern changer
                          • Dozer blade with float function
                            • Foot travel pedals
                              • Gauges or indicators for fuel level engine coolant temperature, hour meter, engine oil pressure, air cleaner, alternator and glow plugs, service interval
                                • Horn
                                  • Hydraulic oil cooler
                                    • Lifting eye on bucket linkage (standard equipment for all regions except Europe)
                                      • Lockable storage box
                                        • Low maintenance linkage pin joints
                                          • Maintenance free battery
                                            • Rubber track
                                              • Retractable seatbelt
                                                • Standard stick
                                                  • Suspension seat, vinyl covered
                                                    • dquo;Thumb ready” sticks
                                                      • Travel alarm (optional in Europe)
                                                        • Beacon socket for canopy machines
                                                          • Boom mounted light
                                                            • Cab, Top Guard ISO 10262 (Level 1), ROPS ISO 12117-2 and TOPS ISO 12117
                                                              • High back suspension seat, fabric covered
                                                                • Mechanical quick coupler
                                                                  • Mirrors for cab and canopy
                                                                    • Steel track

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