303.5E2 CR

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Operator Station

Operation and Hydraulic Control


COMPASS Control Panel

Compact Radius Design


Dozer Blade

Coupler and Work Tool Options

Serviceability and Support


The Cat E2 Series Mini Hydraulic Excavators are designed to carry on the solid performance of their E Series predecessors, while adding even greater value for the customer. The new High Definition Hydraulic (HDH) System, redesigned operator station and enhanced digital control panel specially designed for Cat Mini Excavators – COMPASS (Complete, Operation, Maintenance, Performance And Security System) – are all standard features that improve performance and increase value.


Engine Model Cat® C1.7 Cat® C1.7 Less
Net Power 23.5 HP 17.5 kW Less
Gross Power 24.8 HP 18.5 kW Less
Bore 3.4 in 87.0 mm Less
Displacement 104.0 in³ 1.7 l Less
Stroke 3.6 in 92.4 mm Less
Net Power - ISO 9249 23.5 HP 17.5 kW Less
Note Cat C1.7 engine meets U.S. EPA Tier 4 Final/EU Stage IIIB emission standards. Cat C1.7 engine meets U.S. EPA Tier 4 Final/EU Stage IIIB emission standards. Less
Rated Net Power - ISO 9249 23.5 HP 17.5 kW Less


Operating Weight 8209.0 lb 3723.0 kg Less
Operating Weight - With Cab 8209.0 lb 3723.0 kg Less
Note Weight includes rubber tracks, bucket, operator, full fuel and auxiliary lines. Weight includes rubber tracks, bucket, operator, full fuel and auxiliary lines. Less
Operating Weight - With Canopy 7803.0 lb 3539.0 kg Less

Travel System

Ground Pressure 4.6 psi 31.7 kPa Less
Maximum Traction Force - High Speed 3822.0 lbf 17.0 kN Less
Maximum Traction Force - Low Speed 6992.0 lbf 31.1 kN Less
Travel Speed - High 2.9 mile/h 4.6 km/h Less
Travel Speed - Low 2.0 mile/h 3.2 km/h Less

Hydraulic System

Auxiliary Circuit - Primary 18.5 gal/min 70.0 l/min Less
Auxiliary Circuit - Secondary 6.6 gal/min 25.0 l/min Less
Digging Force - Stick - Long 3799.0 lbf 16.9 kN Less
Digging Force - Stick - Standard 4249.0 lbf 18.9 kN Less
Operating Pressure - Equipment 3553.0 psi 245.0 bar Less
Operating Pressure - Swing 3132.0 psi 216.0 bar Less
Operating Pressure - Travel 3553.0 psi 245.0 bar Less
Pump Flow 26.4 gal/min 100.0 l/min Less
Digging Force - Bucket 7419.0 lbf 33.0 kN Less
Note Load sensing hydraulics with variable displacement piston pump. Load sensing hydraulics with variable displacement piston pump. Less

Swing System

Machine Swing Speed 10.0 r/min 10.0 r/min Less
Boom Swing - Left - With Stop 55° 55° Less
Boom Swing - Left - Without Stop 80° 80° Less
Swing - Right 50° 50° Less


Width 70.0 in 1780.0 mm Less
Height 13.0 in 325.0 mm Less
Dig Depth 19.0 in 470.0 mm Less
Lift Height 16.0 in 400.0 mm Less

Service Refill Capacities

Cooling System 1.5 gal (US) 5.5 l Less
Engine Oil 1.8 gal (US) 7.0 l Less
Hydraulic Tank 11.2 gal (US) 42.3 l Less
Fuel Tank 12.2 gal (US) 46.0 l Less
Hydraulic System 17.2 gal (US) 65.0 l Less

Operating Specifications

Maximum Dig Depth 125.0 in 3180.0 mm Less

303.5E2 CR Standard Equipment

  • – Long stick (optional in Europe)

303.5E2 CR Optional Equipment

  • – Standard stick (Europe only)

Twice the coverage on compact machines

Caterpillar is introducing a new, 2-year machine standard warranty for Cat® Skid Steer Loaders, Compact Track Loaders, Multi Terrain Loaders and Mini Excavators in the U.S. and Canada.

Learn more

Mini Excavator Attachment Options

Cat Mini Excavator attachment options let you get more out of your machines. Browse our attachment offerings to find the ones that are right for your business.

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Swear by Equipment Management

Fuel costs. Labor costs. Maintenance costs. They can all tax your patience. But with timely, accurate data, you can better manage your equipment to keep operating expenses in line. Cat® EMSolutions offers everything you need to control costs, help your guys work better, reduce risks and get more done every day.

See How