Mini Excavators 303.5E CR

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Key Specs

Engine Model
Cat® C1.8
Cat® C1.8
Net Power
31.6 HP
23.6 kW
Operating Weight
7734 lb
3508 kg


Big Performance in a Mini Excavator

The Cat 303.5E CR delivers high performance in a compact radius design to help you work in the tightest applications.

Product Specifications for 303.5E CR

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Engine Model Cat® C1.8 Cat® C1.8
Net Power 31.6 HP 23.6 kW
Gross Power 33.3 HP 24.8 kW
Operating Weight 7734 lb 3508 kg
Operating Weight - With Cab 8139 lb 3692 kg
Maximum Digging Depth - Standard Stick 9.6 ft 2880 mm
Maximum Reach - Ground Level - Standard Stick 16.7 ft 5060 mm
Height - Over Cab 8.2 ft 2500 mm
Maximum Horizontal Reach - Standard Stick 17.1 ft 5200 mm
Shipping Length 15.5 ft 4730 mm
Maximum Vertical Dig Depth - Long Stick 8.2 ft 2470 mm
Maximum Dump Height - Long Stick 11.9 ft 3640 mm
Maximum Horizontal Reach - Long Stick 17.8 ft 5440 mm
Transport Width 5.8 ft 1780 mm
Maximum Dump Height - Standard Stick 11.5 ft 3520 mm
Maximum Cutting Height - Long Stick 16.5 ft 5030 mm
Track Shoe Width 1 ft 300 mm
Maximum Cutting Height - Standard Stick 16.2 ft 4920 mm
Maximum Vertical Dig Depth - Standard Stick 7.7 ft 2320 mm
Shipping Height 8.2 ft 2500 mm
Bore 3.4 in 87 mm
Stroke 4 in 102.4 mm
Displacement 110 in³ 1.8 l
Travel Speed - High 2.8 mile/h 4.6 km/h
Maximum Traction Force - Low Speed 6969 lb 31 kN
Maximum Traction Force - High Speed 3799 lb 16.9 kN
Travel Speed - Low 1.6 mile/h 2.6 km/h
Operating Pressure - Equipment 3553 psi 245 bar
Digging Force - Stick - Standard 4249 lb 18.9 kN
Digging Force - Stick - Long 3799 lb 16.9 kN
Digging Force - Bucket 7419 lb 33 kN
Operating Pressure - Travel 3553 psi 245 bar
Operating Pressure - Swing 2625 psi 181 bar
Auxiliary Circuit - Primary 15.9 gal/min 60 l/min
Auxiliary Circuit - Secondary 7.1 gal/min 27 l/min
Machine Swing Speed 9 r/min 9 r/min
Boom Swing - Left - Without Stop 80 ° 80 °
Boom Swing - Left - With Stop 55 ° 55 °
Boom Swing - Right 50 ° 50 °
Width 70 in 1780 mm
Height 12.8 in 325 mm
Dig Depth 18.5 in 470 mm
Lift Height 15.7 in 400 mm
Cooling System 1.5 gal (US) 5.5 l
Engine Oil 1.8 gal (US) 7 l
Hydraulic Tank 11.2 gal (US) 42.3 l
Fuel Tank 12.2 gal (US) 46 l
Hydraulic System 17.2 gal (US) 65 l
MSC Spec Date 3/06 3/06

303.5E CR Standard Equipment

COMPASS display panel

Dozer blade with float function

Floor mat

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


Hydraulic oil cooler

Lifting eye on bucket linkage (optional in Europe)

Lockable storage box

Low maintenance linkage pin joints

Maintenance free battery

Rubber track

Seatbelt, 76 mm (3 in) wide, retractable (optional in Europe)

Standard stick

Suspension seat, vinyl covered

"Thumb ready" stick (standard equipment in all regions except Europe)

Travel alarm (optional in Europe)

303.5E CR Optional Equipment

Air conditioning

Angle dozer blade with float function

Beacon socket for canopy machines

Boom check valve (Europe only)

Boom mounted light

Cab, radio ready with FOPS ISO 10262 (Level 1), Tip-Over Protection (TOPS) ISO 12117, heater/defroster, interior light and windshield wiper/washer

Ecology drain valve for hydraulic tank

Ecology drain valve for engine oil

Fan and sun blind installation

Front screen guard for cab and canopy

High back suspension seat, fabric covered

Hydraulic quick coupler lines

Long stick

Mechanical quick coupler

Mirrors for cab and canopy

Secondary auxiliary hydraulic lines

Steel track and steel track with rubber pads

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