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Mini Excavators(Non Current)

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.

303.5C CR Hydraulic Excavator

Impressive Performance. The Cat 303.5C series CR has a powerful turbocharged engine, high digging forces and fast cycle times for maximum productivity.

  • Specification Summary

  • Engine ModelS3Q2
  • Net Power29 kW
  • Operating Weight3575 kg
  • Operating Weight with Cab3695 kg
  • Max digging depth - standard stick3150 mm

Product Details


Engine Model S3Q2
Net Power 29 kW
Gross Power 30.2 kW


Operating Weight 3575 kg
Operating Weight with Cab 3695 kg


Max digging depth - standard stick 3150 mm
Max reach ground level - standard stick 5240 mm

Engine Dimensions

Bore 88 mm
Stroke 103 mm
Displacement 1.91 L

Travel System

Gradeability (max) - high 30 Degrees
Max traction force - high speed 17.7 kN
Max traction force - low speed 33.4 kN
Travel Speed - High 4.6 km/h
Travel Speed - Low 2.6 km/h

Hydraulic System

Operating Pressure - Equipment 245 bar
Digging Force - Stick (standard) 21.6 kN
Digging force - Stick, long 19.5 kN
Digging force - bucket 37.8 kN
Operating Pressure - Travel 245 bar
Operating Pressure - Swing 181 bar
Auxiliary circuit - primary (245 bar, 3550 psi) 60 L/min

Swing System

Boom swing - left (without stop) 70 Degrees
Boom swing - left (with stop) 55 Degrees
Boom Swing - Right 50 Degrees


Width 1780 mm
Height 325 mm
Dig Depth 470 mm
Lift Height 400 mm

Service Refill Capacities

Cooling System 6 L
Engine Oil 6 L
Hydraulic Tank 37 L
Fuel Tank 51 L
Hydraulic System 65 L

Performance and Versatility

Turbocharged three cylinder diesel engine in the Cat 303.5C CR provides a massive 39 hp, coupled with a variable displacement pump making it ideal for hard work at altitude. Exceptionally high digging forces and fast cycle times ensure that the Cat 303.5C series CR delivers the productivity demanded by our customers. Load sensing hydraulics optimize flow for smooth powerful performance and increased fuel economy. 1 way (hammer) and 2 way (auger) auxiliary lines including quick connections are fitted as standard. Optional 2nd auxiliary circuit increases work tool versatility, allowing operation of rotating work tools. Dozer float function enables more efficient clean up and landscaping operations. Choice of standard or long stick enables better matching of machine to application. High rotation bucket angle combines good spoil retention and flat back trench characteristics. Additional counterweight allows machine configuration to match the work tool and application.

Comfort and Ease of Operation

Cab and canopy options are available on the C Series CR. Compact radius design gives greater machine versatility and capability to work within confined areas. The radius of the upper body stays within the width of the undercarriage so the operator can concentrate on the work being performed without having to worry about the back of the machine. Automatic two speed travel function optimizes on site travel speed with the required tractive effort. Joystick mounted auxiliary and boom swing controls give finger tip control of machine functions and an uncluttered floor. Optional air conditioning or fan and sun blind package offers further operator comfort.

Low Operating Costs

Robust, reliable and easily serviced are key attributes of the C Series CR design. Swing out rear door and side hood provide excellent access to regular service and maintenance points. Radiator and oil cooler placed side by side for easy cleaning. Protected front linkage lines are routed out of harms way above the boom and stick. End dampening on both boom and stick cylinders reduces shock loading, increasing component life and improving soil retention when loading at height. Liner bearings in the swing casting deliver longer component life and reduced parts replacement costs. 100% pilot controls maintain “as new” machine control and eliminate the need for linkage and cable maintenance. 500 hour oil and filter change period reduces operating costs and machine down time.

Work Tools

Caterpillar's range of buckets and hydraulically powered tools, matched to optimize machine performance. Caterpillar offers a wide range of work tools to increase the machines versatility even further. These tools are designed to get the best out of the machine and deliver excellent value through high productivity and long life. Tools on offer include: Digging Buckets. Ditch Cleaning Buckets. Angling Ditching Buckets. Hydraulic Hammers. Augers. Mechanical Quick Coupler. The Caterpillar Quick Coupler makes tool changes fast and easy. Maximizing performance and compatible with all standard work tools. 2nd auxiliary circuit. Work tools versatility is further enhanced with the option of a second additional auxiliary supply.

Customer Support

Caterpillar dealers offer unmatched customer support with excellent equipment management services and fast parts availability, resulting in maximum uptime and minimum repair costs. Equipment maintenance and management services help optimize performance, reliability and profit.

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