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.
| Net Power | 23.6 hp |
| Operating Weight | 9239 lb |
| Dig Depth | 122.4 in |
| Net Power | 23.6 hp |
| Engine Model | C1.7 |
| Net Power @ 2,200 rpm – U.S. EPA Tier 4 Final/EU Stage V – ISO 9249/EEC 80/1269 | 23.6 hp |
| Net Power – ISO 9249 | 24.7 hp |
| Bore | 3.3 in |
| Stroke | 3.9 in |
| Displacement | 104 in³ |
| Emissions | Meets U.S. EPA Tier 4 Final and EU Stage V emission standards. |
| Note | Advertised power is tested per the specified standard in effect at the time of manufacture. |
| Note (1) | Net power advertised is the power available at the flywheel when the engine is at the rated speed of 2,200 rpm and the engine is installed with the factory configured fan, air intake system, exhaust system and alternator with a minimum alternator load. |
| Operating Weight | 9239 lb |
| Minimum Operating Weight with Canopy* | 7673 lb |
| Maximum Operating Weight with Canopy** | 8930 lb |
| Minimum Operating Weight with Cab* | 7982 lb |
| Maximum Operating Weight with Cab** | 9239 lb |
| EU: CE Plate Weight with Canopy*** | 7784 lb |
| EU: CE Plate Weight with Cab*** | 8004 lb |
| Note (1) | *Minimum Weight is based on fixed rubber tracks, operator, full fuel tank, standard stick, blade, no bucket and extra counterweight. |
| Note (2) | **Maximum Weight is based on steel tracks, operator, full fuel tank, long stick, blade, no bucket and extra counterweight. |
| 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. |
| Dig Depth | 122.4 in |
| Vertical Wall | 94.1 in |
| Maximum Reach – Ground Level | 211.8 in |
| Maximum Reach | 216.9 in |
| Maximum Dig Height | 197.6 in |
| Maximum Dump Clearance | 141.7 in |
| Boom In Reach | 73.2 in |
| Tail Swing without Counterweight | 35 in |
| Tail Swing – with Extra Counterweight | 39.6 in |
| Maximum Blade Depth | 21.1 in |
| Maximum Blade Height | 15.2 in |
| Boom Height – Shipping Position | 68.9 in |
| O/A Shipping Height | 97.6 in |
| Swing Bearing – Height | 22.2 in |
| O/A Undercarriage Length | 87.4 in |
| Overall Shipping Length* | 190.9 in |
| Boom Swing – Right | 34.3 ° |
| Boom Swing – Left | 640 mm |
| Track Belt/Shoe Width | 11.8 in |
| Track Width | 70.1 in |
| Minimum Ground Clearance Below Undercarriage | 12.2 in |
| Stick Length | 61.4 in |
| Note | *Overall Shipping Length depends on blade position during shipment. |
| Cooling System | 1.8 gal (US) |
| Engine Oil | 1.6 gal (US) |
| Fuel Tank | 11.9 gal (US) |
| Hydraulic Tank | 5.3 gal (US) |
| Hydraulic System | 11.9 gal (US) |
| Type | Load Sensing Hydraulics with Variable Displacement Piston Pump |
| Pump Flow at 2,400 rpm | 26 gpm |
| Operating Pressure – Equipment | 3553 psi |
| Operating Pressure – Travel | 3553 psi |
| Operating Pressure – Swing | 2625 psi |
| Auxiliary Circuit – Primary – Flow | 18 gpm |
| Auxiliary Circuit – Primary – Pressure | 3553 psi |
| Auxiliary Circuit – Secondary – Flow | 7 gpm |
| Auxiliary Circuit – Secondary – Pressure | 3553 psi |
| Digging Force – Stick – Standard | 4249 lbf |
| Digging Force – Stick – Long | 3799 lbf |
| Digging Force – Bucket | 7419 lbf |
| Note | *Flow and pressure are not combinable. Under load, as flow rises pressure goes down. |
| Machine Swing Speed | 9 r/min |
| Boom Swing – Left | 75 ° |
| Boom Swing – Right | 50 ° |
| Width | 70.1 in |
| Height | 13.8 in |
| Roll Over Protective Structure (ROPS) | ISO 12117-2:2008 |
| Tip Over Protective Structure (TOPS) | ISO 12117:1997 |
| Top Guard | ISO 10262:1998 (Level I) |
| Dig Depth | 110.6 in |
| Vertical Wall | 88.6 in |
| Maximum Reach – Ground Level | 202 in |
| Maximum Reach | 207.5 in |
| Maximum Dig Height | 193.7 in |
| Maximum Dump Clearance | 137.4 in |
| Boom In Reach | 69.3 in |
| Tail Swing without Counterweight | 35 in |
| Tail Swing with Extra Counterweight | 39.6 in |
| Maximum Blade Depth | 21.1 in |
| Maximum Blade Height | 15.2 in |
| Boom Height – Shipping Position | 59.8 in |
| O/A Shipping Height | 97.6 in |
| Swing Bearing – Height | 22.2 in |
| O/A Undercarriage Length | 87.4 in |
| Overall Shipping Length* | 189 in |
| Boom Swing – Right | 34.3 ° |
| Boom Swing – Left | 25.2 ° |
| Track Belt/Shoe Width | 11.8 in |
| Track Width | 70.1 in |
| Minimum Ground Clearance Below Undercarriage | 12.2 in |
| Stick Length | 49.6 in |
| Note | *Overall Shipping Length depends on blade position during shipment. |
| Air Conditioning | The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a or R1234yf (Europe) (Global Warming Potential = 1430). See label or instruction manual for gas refrigerant identification. The system contains 0.75 kg (1 |
| Operator Sound Pressure (ISO 6396:2008) | 78 dB(A) |
| Average Exterior Sound Pressure (ISO 6395:2008) | 94 dB(A) |
| Note | European Union Directive ‚ “2000/14/EC” |
| Recyclability | 95% |
| Cab | 309 lb |
| Counterweight | 221 lb |
| Extra Counterweight | 551 lb |
| Long Stick | 44 lb |
| Steel Tracks | 287 lb |
| Angle Blade | 353 lb |
| Travel Speed – High | 2.8 mile/h |
| Travel Speed – Low | 1.6 mile/h |
| Maximum Traction Force – High Speed | 3799 lbf |
| Maximum Traction Force – Low Speed | 6969 lbf |
| Ground Pressure – Minimum Weight | 4.3 psi |
| Ground Pressure – Maximum Weight | 5.2 psi |
| Gradeability – Maximum | 30 degrees |
| Cat C1.7 NA Engine (U.S. EPA Tier 4 Final/EU Stage V) |
| Cat C1.7 NA Engine (U.S. EPA Tier 4 Final/EU Stage V) |
| Automatic Engine Idle |
| Automatic Engine Idle |
| Automatic Engine Shutdown |
| Automatic Engine Shutdown |
| Automatic Two Speed Travel |
| Automatic Two Speed Travel |
| Fuel Water Separator |
| Fuel Water Separator |
| Power on Demand (not available in all regions) |
| Power on Demand (not available in all regions) |
| Variable Displacement Piston Pump |
| Variable Displacement Piston Pump |
| Load Sensing/Flow Sharing Hydraulics |
| Load Sensing/Flow Sharing Hydraulics |
| Smart Tech Electronic Pump |
| Accumulator |
| Smart Tech Electronic Pump |
| Automatic Swing Brake |
| Accumulator |
| Auxiliary Line Quick Disconnects |
| Automatic Swing Brake |
| One and Two Way Auxiliary Flow |
| Auxiliary Hydraulic Lines |
| Continuous Auxiliary Flow |
| One and Two Way Auxiliary Flow |
| Auxiliary Hydraulic Lines |
| Continuous Auxiliary Flow |
| Auxiliary Line Quick Disconnects |
| Tilt-up Canopy or Tilt-Up Cab |
| Stick Steer Mode |
| Tilt-up Canopy or Tilt-Up Cab |
| Travel Cruise Control |
| Top Guard ISO 10262:1998 Level I |
| Control Pattern Changer (optional in some regions) |
| ROPS – ISO 12117-2:2008 |
| Adjustable Wrist Rests |
| TOPS – ISO 12117:1997 |
| Washable Floor Mat |
| Travel Pedals and Hand Levers |
| Stick Steer Mode |
| Machine Security |
| Travel Cruise Control |
| Machine Security – Standard Key with Pass Code |
| Control Pattern Changer (optional in some regions) |
| Fabric Suspension Seat (Cab only) |
| Adjustable Wrist Rests |
| Vinyl Suspension Seat (Canopy only) |
| Washable Floor Mat |
| Hydraulic Lockout – All Controls |
| Travel Pedals and Hand Levers |
| Retractable High Visibility Seat Belt (75 mm/3 in) |
| Machine Security |
| Coat Hook |
| Machine Security – Standard Key with Pass Code |
| Cup Holder |
| Fabric Suspension Seat (Cab only) |
| Storage Pocket |
| Vinyl Suspension Seat (Canopy only) |
| Skylight |
| Hydraulic Lockout – All Controls |
| Mounting Bosses for Front |
| Retractable High Visibility Seat Belt (75 mm/3 in) |
| Signaling/Warning Horn |
| Coat Hook |
| Interior Light (Cab only) |
| Cup Holder |
| Boom Light, Halogen (not available in all regions) |
| Storage Pocket |
| Utility Space for Mobile Phone |
| Skylight |
| 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) |
| 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 |
| Rubber Belt (300 mm/11.8 in wide) |
| Dozer Blade |
| Dozer Blade Float |
| Tie Downs on Track Frame |
| Rubber Belt (300 mm/11.8 in wide) |
| Dozer Blade |
| Dozer Blade Float |
| Angle Blade |
| Tie Downs on Track Frame |
| One Piece Boom (2400 mm/94.5 in) |
| Standard Stick (1260 mm/49.6 in) |
| Front Shovel Capable |
| Front Shovel Capable – Pin-On |
| Thumb Ready (not available in all regions) |
| Certified Lifting Eye (optional in some regions) |
| 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) |
| ROPS – ISO 12117-2:2008 |
| TOPS – ISO 12117:1997 |
| Top Guard ISO 10262:1998 (Level I) |
| 12 Volt Battery |
| Software (machine and monitor) |
| Maintenance Free Battery |
| Lock Out/Tag Out Battery Disconnect |
| Signaling/Warning Horn |
| 12 Volt Power Socket |
| 12 Volt Battery |
| Software (machine and monitor) |
| Maintenance Free Battery |
| Signaling/Warning Horn |
| 12 Volt Power Socket |
| Cab with Air Conditioning |
| Cab with Air Conditioning |
| Cab with Heater |
| Cab with Heater |
| Control Pattern Changer (optional in some regions) |
| Control Pattern Changer (optional in some regions) |
| No Travel Pedals and Hand Levers |
| No Travel Pedals and Hand Levers |
| Machine Security – Push to Start with Key Fob/Pass Code |
| Machine Security – Push to Start with Key Fob/Pass Code |
| Vinyl Non-Suspension Seat (Canopy only) |
| Vinyl Non-Suspension Seat (Canopy only) |
| Seat Belt Reminder System |
| LED Front Lights |
| LED Front Lights |
| LED Front and Rear Lights |
| LED Front and Rear Lights |
| LED Boom Light |
| LED Boom Light |
| Mirrors Left and Right |
| Mirrors Left and Right |
| Radio – Bluetooth®, Auxiliary, Microphone, USB (charging only) (Cab only) |
| Radio – Bluetooth®, Auxiliary, Microphone, USB (charging only) (Cab only) |
| Next Generation Advanced Monitor– Touch Screen– Site Reference System– High Definition Camera Capable (IP68 and IP69K)– Numeric Security Code |
| Steel Track (300 mm/11.8 in wide) |
| Steel Track (300 mm/11.8 in wide) |
| Angle Blade |
| Long Stick (1560 mm/61.4 in) |
| Long Stick (1560 mm/61.4 in) |
| Front Shovel Capable – Dual Lock Manual Coupler |
| Front Shovel Capable – Dual Lock Manual Coupler |
| Attachments including Couplers, Thumbs, Buckets, Augers and Hammers |
| Front Shovel Capable – Hydraulic Coupler |
| 2nd Auxiliary Hydraulic Lines |
| 2nd Auxiliary Hydraulic Lines |
| Boom Lowering Check Valve |
| Attachments including Couplers, Thumbs, Buckets, Augers and Hammers |
| Stick Lowering Check Valve |
| Boom Lowering Check Valve (Standard in Europe) |
| Hydraulic Quick Coupler Lines (not available in all regions) |
| Stick Lowering Check Valve (Standard in Europe) |
| Hydraulic Quick Coupler Lines (not available in all regions) |
| Front Shovel Capable – Hydraulic Coupler |
| Battery Disconnect |
| Product Link PL243 (regulations apply) |
| Product Link PL243 (regulations apply) |
| Product Link PLE643 (regulations apply) |
| Product Link PLE643 (regulations apply) |
| Travel Alarm (standard in some regions) |
| Travel Alarm (standard in some regions) |
| Polycarbonate Half Height Front Guard (Canopy only) |
| Polycarbonate Front Guard (ISO 10262:1998 Level I and EN356 P5A) |
| Guard, Canopy |
| Guard, Mesh |
| Bio Oil Capable |
| Eco Drain |
| Water Jacket Heater |
| Bio Oil Capable |
| Light Counterweight (100 kg/221 lb) |
| Eco Drain |
| Extra Counterweight (250 kg/551 lb) |
| Water Jacket Heater |
