Caterpillar 303.5 Specs & Review

Technical Specifications of Caterpillar 303.5 Mini Excavator


  • Track Gauge: 4.1ft in
  • Height – Over Cab: 8ft in
  • Height – Over Canopy: 8ft in
  • Maximum Cutting Height – Long Stick: 17.3ft in
  • Maximum Cutting Height – Standard Stick: 16.61ft in
  • Maximum Digging Depth – Long Stick: 11.8ft in
  • Maximum Digging Depth – Standard Stick: 10.4ft in
  • Maximum Dump Height – Long Stick: 12.6ft in
  • Maximum Dump Height – Standard Stick: 11.9ft in
  • Maximum Horizontal Reach – Long Stick: 18.61ft in
  • Maximum Horizontal Reach – Standard Stick: 17.4ft in
  • Maximum Reach – Ground Level – Long Stick: 18.2ft in
  • Maximum Reach – Ground Level – Standard Stick: 17ft in
  • Maximum Vertical Dig Depth – Long Stick: 9.1ft in
  • Maximum Vertical Dig Depth – Standard Stick: 7.9ft in
  • Shipping Length: 16.8ft in
  • Stick Length – Long Stick: 5.5ft in
  • Stick Length – Standard Stick: 4.1ft in
  • Swing Radius – Rear: 4.7ft in
  • Track Shoe Width: 12ft in
  • Width – Over Track: 5.1ft in
  • Center Ground Clearance: 1ft in
  • Width – Upper Structure: 5.1ft in

Electrical System

  • Electrical System Type: Twelve-volt system

Swing System

  • Swing System Type: Hydraulic Motor Driven
  • Machine Swing Speed: 9.3rpm
  • Boom Swing – Left – Without Stop: 90 degrees
  • Boom Swing – Left – With Stop: 55 degrees
  • Boom Swing – Right: 50 degrees


  • Gross Power: 27hp
  • Net Power: 25hp
  • Engine Model: 3013


  • Operating Weight: 7546lb


  • Operating Weight – With Cab: 7810lb


  • Height: 14.6in
  • Width: 5.1ft in
  • Lift Height: 16.5in
  • Dig Depth: 13.8in

Hydraulic System

  • Operating Pressure – Swing: 2494 psi
  • Pump – Gear (Single): 7.54 gal/min
  • Pump – Gear (Tandem): 10.01 gal/min
  • Operating Pressure – Equipment: 2987 psi
  • Operating Pressure – Travel: 2987 psi
  • Digging Force – Stick – Standard: 4114lb
  • Digging Force – Stick – Long: 3080lb
  • Digging Force – Bucket: 5742lb

Service Refill Capacities

  • Fuel Tank: 14.3gal
  • Hydraulic Tank: 12gal
  • Hydraulic System: 18.2gal
  • Engine Oil: 1.5gal
  • Cooling System Tag: 1.3gal

Travel System

  • Maximum Traction Force – High Speed: 3825lb
  • Maximum Traction Force – Low Speed: 6750lb
  • Gradeability – Maximum – High: 30 degrees
  • Travel Speed – High: 2.8mph
  • Travel Speed – Low: 1.6mph
  • Gradeability – Maximum – Low: 37 degrees

Frequently Asked Questions

What is the gross power of the engine?

The gross power of the engine is 27hp.

What is the operating weight of the excavator?

The operating weight is 7546lb.

What is the maximum digging depth?

The maximum digging depth with a long stick is 11.8ft in and with a standard stick is 10.4ft in.

What is the fuel tank capacity?

The fuel tank capacity is 14.3 gallons.

What is the travel speed?

The travel speed is 2.8mph on high and 1.6mph on low.

Review of Caterpillar 303.5 Mini Excavator

Key Specifications

The Caterpillar 303.5 Mini Excavator is powered by a 3013 engine model with a gross power of 27hp. It has an operating weight of 7546lb and features a twelve-volt electrical system.


The excavator offers impressive performance with a maximum digging depth of 11.8ft with a long stick. The hydraulic system is robust, providing a digging force of 5742lb for the bucket.


Notable features include a twelve-volt electrical system and a hydraulic motor-driven swing system. The machine swing speed is 9.3rpm, allowing for efficient operation.


The Caterpillar 303.5 is known for its reliability, especially with its durable engine and robust hydraulic system.

Value for Money

Considering its features and performance, the excavator offers good value for money when compared to similar models in the market.

Pros and Cons

  • Pros: High digging force, robust hydraulic system, reliable engine.
  • Cons: May be considered expensive for some budgets, limited speed options.

Best Suited For

The excavator is best suited for small to medium-sized construction projects, landscaping, and utility work.

Final Verdict

The Caterpillar 303.5 Mini Excavator is a reliable and efficient machine that offers a range of features making it a valuable asset for various types of work. Its performance and reliability make it a worthy investment.