Main content

Caterpillar

303.5 CR Mini Hydraulic Excavator

Net Power

23.6 HP

17.6 kW

Operating Weight

9239 lb

4190 kg

Dig Depth

122.4 in

3110 mm

Overview

The Cat® 303.5 CR Mini Excavator delivers power and performance in a compact size to help you work in a wide range of applications.

Media

Photos

Videos

360° View

Exterior

Model shown represents features on all Cat® Mini Excavators except where indicated.

Interior

Model shown represents features on all Cat® Mini Excavators except where indicated.

Features

Details

Specifications

Spec Value
Net Power 23.6 HP 17.6 kW
Engine Model C1.7 C1.7
Bore 3.3 in 84 mm
Net Power @ 2,200 rpm – U.S. EPA Tier 4 Final/EU Stage V – ISO 9249/EEC 80/1269 23.6 HP 17.6 kW
Displacement 104 in³ 1.7 l
Note Net power is tested per ISO 9249 and 80/1269/EEC. Net power is tested per ISO 9249 and 80/1269/EEC.
Gross Power – 2,400 rpm – SAE J1995 24.7 HP 18.4 kW
Emissions Meets U.S. EPA Tier 4 Final and EU Stage V emission standards. Meets U.S. EPA Tier 4 Final and EU Stage V emission standards.
Note (2) Net power advertised is the power available at the flywheel when the engine is at rated speed and rated power when the engine is installed with the factory configured fan, air intake system, exhaust system, and alternator with a minimum alternator load. Net power advertised is the power available at the flywheel when the engine is at rated speed and rated power when the engine is installed with the factory configured fan, air intake system, exhaust system, and alternator with a minimum alternator load.
Stroke 3.9 in 100 mm
Spec Value
Operating Weight 9239 lb 4190 kg
Minimum Operating Weight with Canopy* 7673 lb 3480 kg
EU: CE Plate Weight with Cab*** 8004 lb 3630 kg
Note (3) ***CE Plate Weight is based on the most common EU configuration. Includes 75 kg (165 lb) operator and full fuel tank and excludes bucket. ***CE Plate Weight is based on the most common EU configuration. Includes 75 kg (165 lb) operator and full fuel tank and excludes bucket.
Maximum Operating Weight with Cab** 9239 lb 4190 kg
Maximum Operating Weight with Canopy** 8930 lb 4050 kg
EU: CE Plate Weight with Canopy*** 7784 lb 3530 kg
Minimum Operating Weight with Cab* 7982 lb 3620 kg
Note (1) * Minimum Weight is based on fixed rubber tracks, operator, full fuel tank, standard stick, blade, bucket and no extra counterweight. * Minimum Weight is based on fixed rubber tracks, operator, full fuel tank, standard stick, blade, bucket and no extra counterweight.
Note (2) **Maximum Weight is based on steel tracks, operator, full fuel tank, long stick, blade, bucket and extra counterweight. **Maximum Weight is based on steel tracks, operator, full fuel tank, long stick, blade, bucket and extra counterweight.
Spec Value
Dig Depth 122.4 in 3110 mm
Track Belt/Shoe Width 11.8 in 300 mm
Maximum Reach 216.9 in 5510 mm
O/A Track Width 70.1 in 1780 mm
Maximum Blade Depth 21.1 in 535 mm
Tail Swing without Counterweight 35 in 890 mm
Stick Length 61.4 in 1560 mm
Swing Bearing – Height 22.2 in 565 mm
Boom Swing – Left 640 mm 25.2 °
Overall Shipping Length* 190.9 in 4850 mm
Maximum Reach – Ground Level 211.8 in 5380 mm
Maximum Dump Clearance 141.7 in 3600 mm
Tail Swing with Counterweight 37.8 in 960 mm
O/A Shipping Height 97.6 in 2480 mm
Note *Overall Shipping Length depends on blade position during shipment. *Overall Shipping Length depends on blade position during shipment.
Boom In Reach 73.2 in 1860 mm
Maximum Dig Height 197.6 in 5020 mm
Vertical Wall 94.1 in 2390 mm
Boom Height – Shipping Position 68.9 in 1750 mm
Maximum Blade Height 15.2 in 385 mm
O/A Undercarriage Length 87.4 in 2220 mm
Boom Swing – Right 34.3 ° 870 mm
Ground Clearance 12.2 in 310 mm
Spec Value
Height 13.8 in 350 mm
Width 70.1 in 1780 mm
Spec Value
Boom Swing – Right 34.3 ° 870 mm
Tail Swing with Counterweight 37.8 in 960 mm
Stick Length 49.6 in 1260 mm
Maximum Reach – Ground Level 202 in 5130 mm
Boom Swing – Left 25.2 ° 640 mm
Maximum Reach 207.5 in 5270 mm
Track Belt/Shoe Width 11.8 in 300 mm
Maximum Dump Clearance 137.4 in 3490 mm
Swing Bearing – Height 22.2 in 565 mm
Boom Height – Shipping Position 59.8 in 1520 mm
O/A Shipping Height 97.6 in 2480 mm
Overall Shipping Length* 189 in 4800 mm
Boom In Reach 69.3 in 1760 mm
Note *Overall Shipping Length depends on blade position during shipment. *Overall Shipping Length depends on blade position during shipment.
Tail Swing with Extra Counterweight 39.6 in 1005 mm
Maximum Dig Height 193.7 in 4920 mm
Vertical Wall 88.6 in 2250 mm
Dig Depth 110.6 in 2810 mm
O/A Undercarriage Length 87.4 in 2220 mm
Tail Swing without Counterweight 35 in 890 mm
Maximum Blade Depth 21.1 in 535 mm
Maximum Blade Height 15.2 in 385 mm
Ground Clearance 12.2 in 310 mm
Spec Value
Cab 309 lb 140 kg
Counterweight 221 lb 100 kg
Steel Tracks 287 lb 130 kg
Long Stick 44 lb 20 kg
Angle Blade 353 lb 160 kg
Extra Counterweight 551 lb 250 kg
Spec Value
Fuel Tank 11.9 gal (US) 45 l
Hydraulic Tank 5.3 gal (US) 20 l
Cooling System 1.8 gal (US) 7 l
Engine Oil 1.6 gal (US) 6 l
Hydraulic System 11.9 gal (US) 45 l
Spec Value
Ground Pressure – Minimum Weight 4.3 psi 29.6 kPa
Maximum Traction Force – High Speed 3799 lbf 16.9 kN
Maximum Traction Force – Low Speed 6969 lbf 31 kN
Travel Speed – High 2.8 mile/h 4.5 km/h
Gradeability – Maximum 30 degrees 30 degrees
Travel Speed – Low 1.6 mile/h 2.6 km/h
Ground Pressure – Maximum Weight 5.2 psi 35.7 kPa
Spec Value
Pump Flow at 2,400 rpm 26 gal/min 100 l/min
Auxiliary Circuit – Primary – Flow 18 gal/min 70 l/min
Operating Pressure – Swing 2625 psi 181 bar
Type Load Sensing Hydraulics with Variable Displacement Piston Pump Load Sensing Hydraulics with Variable Displacement Piston Pump
Auxiliary Circuit – Secondary – Pressure 3553 psi 245 bar
Digging Force – Stick – Long 3799 lbf 16.9 kN
Auxiliary Circuit – Secondary – Flow 7 gal/min 25 l/min
Digging Force – Bucket 7419 lbf 33 kN
Operating Pressure – Travel 3553 psi 245 bar
Operating Pressure – Equipment 3553 psi 245 bar
Auxiliary Circuit – Primary – Pressure 3553 psi 245 bar
Digging Force – Stick – Standard 4249 lbf 18.9 kN
Note *Flow and pressure are not combinable. Under load, as flow rises pressure goes down. *Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Spec Value
Note European Union Directive ‚ "2000/14/EC" European Union Directive ‚ "2000/14/EC"
Operator Sound Pressure (ISO 6396:2008) 78 dB(A) 78 dB(A)
Average Exterior Sound Pressure (ISO 6395:2008) 94 dB(A) 94 dB(A)
Spec Value
Machine Swing Speed 9 r/min 9 r/min
Boom Swing – Right 50 ° 50 °
Boom Swing – Left 75 ° 75 °
Spec Value
Tail Swing with Extra Counterweight 39.6 in 1005 mm
Spec Value
Roll Over Protective Structure (ROPS) ISO 12117-2:2008 ISO 12117-2:2008
Tip Over Protective Structure (TOPS) ISO 12117:1997 ISO 12117:1997
Top Guard ISO 10262:1998 (Level I) ISO 10262:1998 (Level I)
Spec Value
Tail Swing with Extra Counterweight 39.6 in 1005 mm

Standard Equipment

ENGINE

  • Cat C1.7 NA Engine (U.S. EPA Tier 4 Final/EU Stage V)
  • Automatic Engine Idle
  • Automatic Engine Shutdown
  • Automatic Two Speed Travel
  • Fuel Water Separator
  • Power on Demand (not available in all regions)
  • Variable Displacement Piston Pump
  • Load Sensing/Flow Sharing Hydraulics

HYDRAULICS

  • Smart Tech Electronic Pump
  • Accumulator
  • Automatic Swing Brake
  • Auxiliary Hydraulic Lines
  • One and Two Way Auxiliary Flow
  • Continuous Auxiliary Flow
  • Auxiliary Line Quick Disconnects

OPERATOR ENVIRONMENT

  • Tilt-up Canopy or Tilt-Up Cab
  • Top Guard ISO 10262:1998 Level I
  • ROPS – ISO 12117-2:2008
  • TOPS – ISO 12117:1997
  • Stick Steer Mode
  • Travel Cruise Control
  • Control Pattern Changer (optional in some regions)
  • Adjustable Wrist Rests
  • Washable Floor Mat
  • Travel Pedals and Hand Levers
  • Machine Security
  • Machine Security – Standard Key with Pass Code
  • Fabric Suspension Seat (Cab only)
  • Vinyl Suspension Seat (Canopy only)
  • Hydraulic Lockout – All Controls
  • Retractable High Visibility Seat Belt (75 mm/3 in)
  • Coat Hook
  • Cup Holder
  • Storage Pocket
  • Skylight
  • Mounting Bosses for Front
  • Signaling/Warning Horn
  • Interior Light (Cab only)
  • Boom Light, Halogen
  • Utility Space for Mobile Phone
  • Next Generation Color LCD Monitor (IP66)
    – Fuel Level and Coolant Temperature Gauges
    – Maintenance and Machine Monitoring
    – Performance and Machine Adjustments
    – Numeric Security Code
    – Multiple Languages
    – Hour Meter with Wake Up Switch
    – Jog Dial (cab only)

    Next Generation Advanced Monitor (Optional)
    – Fuel Level and Coolant Temperature Gauges
    – Maintenance and Machine Monitoring
    – Performance and Machine Adjustments
    – Numeric Security Code
    – Multiple Languages
    – Hour Meter with Wake Up Switch

UNDERCARRIAGE

  • Rubber Belt (300 mm/11.8 in wide)
  • Dozer Blade
  • Dozer Blade Float
  • Angle Blade
  • Tie Downs on Track Frame

BOOM, STICK AND LINKAGES

  • One Piece Boom (2400 mm/94.5 in)
  • Standard Stick (1260 mm/49.6 in)
  • Front Shovel Capable – Pin-On
  • Thumb Ready (not available in all regions)
  • Certified Lifting Eye (optional in some regions)

ELECTRICAL

  • 12 Volt Battery
  • Software (machine and monitor)
  • Maintenance Free Battery
  • Signaling/Warning Horn
  • 12 Volt Power Socket

Optional Equipment

OPERATOR ENVIRONMENT

  • Cab with Air Conditioning
  • Cab with Heater
  • Control Pattern Changer (optional in some regions)
  • No Travel Pedals and Hand Levers
  • Machine Security – Push to Start with Key Fob/Pass Code
  • Vinyl Non-Suspension Seat (Canopy only)
  • LED Front Lights
  • LED Front and Rear Lights
  • LED Boom Light
  • Mirrors Left and Right
  • Radio – Bluetooth®, Auxiliary, Microphone, USB (charging only) (Cab only)

UNDERCARRIAGE

  • Steel Track (300 mm/11.8 in wide)

BOOM, STICK AND LINKAGES

  • Long Stick (1560 mm/61.4 in)
  • Front Shovel Capable – Dual Lock Manual Coupler
  • Attachments including Couplers, Thumbs, Buckets, Augers and Hammers
  • 2nd Auxiliary Hydraulic Lines
  • Boom Lowering Check Valve
  • Stick Lowering Check Valve
  • Hydraulic Quick Coupler Lines (not available in all regions)
  • Front Shovel Capable – Hydraulic Coupler

ELECTRICAL

  • Battery Disconnect
  • Product Link PL243 (regulations apply)
  • Product Link PLE643 (regulations apply)
  • Travel Alarm (standard in some regions)

GUARDING

  • Guard, Canopy
  • Guard, Mesh

OTHER

  • Bio Oil Capable
  • Eco Drain
  • Water Jacket Heater

Sign up for Riggs Cat Emails

  • This field is for validation purposes and should be left unchanged.