303.5 CR

303.5 CR Mini Hydraulic Excavator

The upgraded 303.5 CR delivers power and performance in a wide range of applications. Faster transient speeds, coupled with exclusive features like stick steer joystick travel get you moving quickly and comfortably so you can focus on the task at hand.

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Specifications

NameTypeValueUnit Value (Imperial)Unit NameUnit Value (Metric)Unit Name (Metric)
Net Powermeasurement23.6hp17.6kW
Engine ModeltextC1.7
Net Power @ 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269measurement23.6hp17.6kW

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Documents & Spec Sheets

303.5 CR Small Product Brochure (Global except China and Japan)

303.5 CR Small Product Brochure (Global except China and Japan)

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Cat Mini Hydraulic Excavators Product Line Brochure (North America)

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Cat Mini Hydraulic Excavators Product Line Brochure (Europe)

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Options And Accessories Kit Guide for Mini Hydraulic Excavators

Options And Accessories Kit Guide for Mini Hydraulic Excavators

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Cat Attachments for Mini Excavators Brochure

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Attachment Compatibility Guide for Mini Excavators

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Features & Benefits

ALL DAY COMFORT
303.5 CR Mini Excavator
  • Choose either a canopy or a sealed and pressurized cab which can be equipped with air conditioning, adjustable wrist rests, and a suspension seat option to help keep you working comfortably all day long.
EASY TO OPERATE
303.5 CR Mini Excavator
  • Controls are easy to use and the intuitive Next Generation LCD monitor provides easy to read machine information. An advanced touchscreen monitor can also be equipped.
STICK STEER TRAVEL MODE
303.5 CR Mini Excavator
  • Moving around the job site is even easier with the Cat Stick Steer option. Easily switch from traditional travel controls with levers and pedals to joystick controls to move the machine and to operate the blade. The benefit of less effort and improved control is in your hands!
BIG PERFORMANCE IN A COMPACT DESIGN
303.5 CR Mini Excavator
  • Strong lift and dig performance helps you get the job done faster. The compact radius design lets you access and work in the tightest areas. Dozer float allows for easy clean up.
SAFETY ON THE JOB SITE
303.5 CR Mini Excavator
  • Your safety is our top priority. The Cat mini excavator is designed to help keep you safe on the job. Courtesy work lights and a fluorescent retractable seat belt are just a couple of the safety features we’ve built into the machine.
SIMPLE SERVICE FOR LESS DOWNTIME
303.5 CR Mini Excavator
  • Maintenance is quick and easy on the Cat mini excavator. Routine check points are easy to access at ground level through the side doors. The unique tilt up cab or canopy lets you reach additional service areas when needed.
LOWER OPERATING COSTS
303.5 CR Mini Excavator
  • Equipped with features such as auto idle, auto engine shutdown, and efficient hydraulics with a variable displacement pump, the Cat mini excavator was designed with reducing your operating costs in mind.
SUSTAINABILITY
303.5 CR Mini Excavator
  • The Cat® C1.7 engine meets U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 emission standards.
  • Cat diesel engines are required to use ULSD (ultra-low sulfur diesel fuel with 15 ppm of sulfur or less) or ULSD blended with the following lower-carbon intensity fuels up to: 20% biodiesel FAME (fatty acid methyl ester) * or 100% renewable diesel, HVO (hydrotreated vegetable oil) and GTL (gas-to-liquid) fuels. Refer to guidelines for successful application. Please consult your Cat dealer or “Caterpillar Machine Fluids Recommendations” (SEBU6250) for details.
  • Auto Idle helps reduce unnecessary fuel burn and greenhouse gas emissions by allowing the engine to automatically go into idle mode when the machine is not working.
  • Engine Idle Shutdown Timer reduces fuel burn, greenhouse gas emissions and unnecessary idle time by shutting down the machine after a pre-set idling period.
  • Cruise control helps you maintain a constant speed as you travel across your jobsite saving fuel and reducing greenhouse gas emissions.
  • The Cat® Seat Belt Reminder provides audible and visual warnings to remind operators to buckle up during machine operation. The easy-to-install system is compatible with all equipment brands to help ensure operator safety.
  • Extended maintenance intervals not only reduce downtime but decrease the amount of fluid and filters that are replaced over the life of the machine.
  • Remote Flash minimizes downtime and maintenance time while keeping your asset running with maximum efficiency. Alerts for machine updates are sent virtually from your Cat dealer and updates can be deployed without a dealer technician needing to be onsite.(if equipped)
  • Remote Troubleshoot decreases maintenance time and keeps your machine running with maximum efficiency by allowing your Cat dealer to virtually test the machine while working. Once a problem is identified, a technician can fix it the first time, saving time and money.(if equipped)
  • Cat Grade with advanced 2D and 3D technologies combine advanced guidance with optional automated machine control helping you reach grading targets while reducing fuel burn and greenhouse gas emissions by improving efficiency, job site productivity, and accuracy. (if equipped).
*Engines with no aftertreatment devices can use higher blends, up to 100% biodiesel. (for use of blends higher than 20% biodiesel, consult your Cat dealer)

Complete Specifications

Engine

NameTypeValueUnit Value (Imperial)Unit NameUnit Value (Metric)Unit Name (Metric)
Net Powermeasurement23.6hp17.6kW
Engine ModeltextC1.7
Net Power @ 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269measurement23.6hp17.6kW
Net Power - ISO 9249measurement24.7hp18.4kW
Boremeasurement3.3in84mm
Strokemeasurement3.9in100mm
Displacementmeasurement104in³1.7l
EmissionstextMeets U.S. EPA Tier 4 Final and EU Stage V emission standards.
NotetextAdvertised power is tested per the specified standard in effect at the time of manufacture.
Note (1)textNet 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 Weightmeasurement9239lb4190kg
Minimum Operating Weight with Canopy*measurement7673lb3480kg
Maximum Operating Weight with Canopy**measurement8930lb4050kg
Minimum Operating Weight with Cab*measurement7982lb3620kg
Maximum Operating Weight with Cab**measurement9239lb4190kg
EU: CE Plate Weight with Canopy***measurement7784lb3530kg
EU: CE Plate Weight with Cab***measurement8004lb3630kg
Note (1)text*Minimum Weight is based on fixed rubber tracks, operator, full fuel tank, standard stick, blade, no bucket and extra counterweight.
Note (2)text**Maximum Weight is based on steel tracks, operator, full fuel tank, long stick, blade, no bucket and extra counterweight.
Note (3)text***CE Plate Weight is based on the most common EU configuration. Includes 75 kg (165 lb) operator and full fuel tank and excludes bucket.
Cabmeasurement309lb140kg
Counterweightmeasurement221lb100kg
Extra Counterweightmeasurement551lb250kg
Long Stickmeasurement44lb20kg
Steel Tracksmeasurement287lb130kg
Angle Blademeasurement353lb160kg
Travel Speed - Highmeasurement2.8mile/h4.5km/h
Travel Speed - Lowmeasurement1.6mile/h2.6km/h
Maximum Traction Force - High Speedmeasurement3799lbf16.9kN
Maximum Traction Force - Low Speedmeasurement6969lbf31kN
Ground Pressure - Minimum Weightmeasurement4.3psi29.6kPa
Ground Pressure - Maximum Weightmeasurement5.2psi35.7kPa
Gradeability - Maximumtext30 degrees
Cooling Systemmeasurement1.8gal (US)7l
Engine Oilmeasurement1.6gal (US)6l
Fuel Tankmeasurement11.9gal (US)45l
Hydraulic Tankmeasurement5.3gal (US)20l
Hydraulic Systemmeasurement11.9gal (US)45l
TypetextLoad Sensing Hydraulics with Variable Displacement Piston Pump
Pump Flow at 2,400 rpmmeasurement26gpm100L/min
Operating Pressure - Equipmentmeasurement3553psi245bar
Operating Pressure - Travelmeasurement3553psi245bar
Operating Pressure - Swingmeasurement2625psi181bar
Auxiliary Circuit - Primary - Flowmeasurement18gpm70L/min
Auxiliary Circuit - Primary - Pressuremeasurement3553psi245bar
Auxiliary Circuit - Secondary - Flowmeasurement7gpm25L/min
Auxiliary Circuit - Secondary - Pressuremeasurement3553psi245bar
Digging Force - Stick - Standardmeasurement4249lbf18.9kN
Digging Force - Stick - Longmeasurement3799lbf16.9kN
Digging Force - Bucketmeasurement7419lbf33kN
Notetext*Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Machine Swing Speedmeasurement9r/min9r/min
Boom Swing - Leftmeasurement75°75°
Boom Swing - Rightmeasurement50°50°
Widthmeasurement70.1in1780mm
Heightmeasurement13.8in350mm
Roll Over Protective Structure (ROPS)textISO 12117-2:2008
Tip Over Protective Structure (TOPS)textISO 12117:1997
Top GuardtextISO 10262:1998 (Level I)
Dig Depthmeasurement110.6in2810mm
Vertical Wallmeasurement88.6in2250mm
Maximum Reach - Ground Levelmeasurement202in5130mm
Maximum Reachmeasurement207.5in5270mm
Maximum Dig Heightmeasurement193.7in4920mm
Maximum Dump Clearancemeasurement137.4in3490mm
Boom In Reachmeasurement69.3in1760mm
Tail Swing without Counterweightmeasurement35in890mm
Tail Swing with Extra Counterweightmeasurement39.6in1005mm
Maximum Blade Depthmeasurement21.1in535mm
Maximum Blade Heightmeasurement15.2in385mm
Boom Height - Shipping Positionmeasurement59.8in1520mm
O/A Shipping Heightmeasurement97.6in2480mm
Swing Bearing - Heightmeasurement22.2in565mm
O/A Undercarriage Lengthmeasurement87.4in2220mm
Overall Shipping Length*measurement189in4800mm
Boom Swing - Rightmeasurement34.3°870mm
Boom Swing - Leftmeasurement25.2°640mm
Track Belt/Shoe Widthmeasurement11.8in300mm
Track Widthmeasurement70.1in1780mm
Minimum Ground Clearance Below Undercarriagemeasurement12.2in310mm
Stick Lengthmeasurement49.6in1260mm
Notetext*Overall Shipping Length depends on blade position during shipment.
Dig Depthmeasurement122.4in3110mm
Vertical Wallmeasurement94.1in2390mm
Maximum Reach - Ground Levelmeasurement211.8in5380mm
Maximum Reachmeasurement216.9in5510mm
Maximum Dig Heightmeasurement197.6in5020mm
Maximum Dump Clearancemeasurement141.7in3600mm
Boom In Reachmeasurement73.2in1860mm
Tail Swing without Counterweightmeasurement35in890mm
Tail Swing - with Extra Counterweightmeasurement39.6in1005mm
Maximum Blade Depthmeasurement21.1in535mm
Maximum Blade Heightmeasurement15.2in385mm
Boom Height - Shipping Positionmeasurement68.9in1750mm
O/A Shipping Heightmeasurement97.6in2480mm
Swing Bearing - Heightmeasurement22.2in565mm
O/A Undercarriage Lengthmeasurement87.4in2220mm
Overall Shipping Length*measurement190.9in4850mm
Boom Swing - Rightmeasurement34.3°870mm
Boom Swing - Leftmeasurement640mm25.2°
Track Belt/Shoe Widthmeasurement11.8in300mm
Track Widthmeasurement70.1in1780mm
Minimum Ground Clearance Below Undercarriagemeasurement12.2in310mm
Stick Lengthmeasurement61.4in1560mm
Notetext*Overall Shipping Length depends on blade position during shipment.
Air ConditioningtextThe 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 (1.65 lb), 0.90 kg (1.98 lb) or 1.0 kg (2.20 lb) of refrigerant which has a CO2 equivalent of 1.430 metric tonnes (1.576 tons) for R134a and 0.001 tonnes (0.001 tons) for R1234yf (Europe).
Operator Sound Pressure (ISO 6396:2008)measurement78dB(A)78dB(A)
Average Exterior Sound Pressure (ISO 6395:2008)measurement94dB(A)94dB(A)
NotetextEuropean Union Directive ‚ "2000/14/EC"
Recyclabilitytext95%
Tail Swing with Counterweightmeasurement37.8in960mm
Gross Power - 2,400 rpm - SAE J1995measurement24.7hp18.4kW
Tail Swing with Extra Counterweightmeasurement39.6in1005mm
Tail Swing with Extra Counterweightmeasurement39.6in1005mm
Note (2)textNet 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.
Tail Swing with Counterweightmeasurement37.8in960mm
O/A Track Widthmeasurement70.1in1780mm
Ground Clearancemeasurement12.2in310mm
Ground Clearancemeasurement12.2in310mm

Standard Equipment

ENGINE

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

HYDRAULICS

  • Smart Tech Electronic Pump
  • Accumulator
  • Automatic Swing Brake
  • Smart Tech Electronic Pump
  • Auxiliary Line Quick Disconnects
  • Accumulator
  • One and Two Way Auxiliary Flow
  • Automatic Swing Brake
  • Continuous Auxiliary Flow
  • Auxiliary Hydraulic Lines
  • 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
  • Stick Steer Mode
  • Travel Cruise Control
  • Tilt-up Canopy or Tilt-Up Cab
  • Control Pattern Changer (optional in some regions)
  • Top Guard ISO 10262:1998 Level I
  • Adjustable Wrist Rests
  • ROPS – ISO 12117-2:2008
  • Washable Floor Mat
  • TOPS – ISO 12117:1997
  • Travel Pedals and Hand Levers
  • Machine Security
  • Stick Steer Mode
  • Machine Security – Standard Key with Pass Code
  • Travel Cruise Control
  • Fabric Suspension Seat (Cab only)
  • Control Pattern Changer (optional in some regions)
  • Vinyl Suspension Seat (Canopy only)
  • Adjustable Wrist Rests
  • Hydraulic Lockout – All Controls
  • Washable Floor Mat
  • Retractable High Visibility Seat Belt (75 mm/3 in)
  • Travel Pedals and Hand Levers
  • Coat Hook
  • Machine Security
  • Cup Holder
  • Machine Security – Standard Key with Pass Code
  • Storage Pocket
  • Fabric Suspension Seat (Cab only)
  • Skylight
  • Vinyl Suspension Seat (Canopy only)
  • Mounting Bosses for Front
  • Hydraulic Lockout – All Controls
  • Signaling/Warning Horn
  • Retractable High Visibility Seat Belt (75 mm/3 in)
  • Interior Light (Cab only)
  • Coat Hook
  • Boom Light, Halogen (not available in all regions)
  • Cup Holder
  • Utility Space for Mobile Phone
  • Storage Pocket
  • 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)
  • 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
  • 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

BOOM, STICK AND LINKAGES

  • 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)

GUARDING

  • ROPS – ISO 12117-2:2008
  • TOPS – ISO 12117:1997
  • Top Guard ISO 10262:1998 (Level I)

ELECTRICAL

  • 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

Optional Equipment

OPERATOR ENVIRONMENT

  • Cab with Air Conditioning
  • Cab with Heater
  • Cab with Air Conditioning
  • Control Pattern Changer (optional in some regions)
  • Cab with Heater
  • No Travel Pedals and Hand Levers
  • Control Pattern Changer (optional in some regions)
  • Machine Security – Push to Start with Key Fob/Pass Code
  • No Travel Pedals and Hand Levers
  • Vinyl Non-Suspension Seat (Canopy only)
  • Machine Security – Push to Start with Key Fob/Pass Code
  • Seat Belt Reminder System
  • Vinyl Non-Suspension Seat (Canopy only)
  • 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

UNDERCARRIAGE

  • Steel Track (300 mm/11.8 in wide)
  • Steel Track (300 mm/11.8 in wide)
  • Angle Blade

BOOM, STICK AND LINKAGES

  • 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
  • Front Shovel Capable – Hydraulic Coupler
  • Attachments including Couplers, Thumbs, Buckets, Augers and Hammers
  • 2nd Auxiliary Hydraulic Lines
  • 2nd Auxiliary Hydraulic Lines
  • Attachments including Couplers, Thumbs, Buckets, Augers and Hammers
  • Boom Lowering Check Valve
  • Boom Lowering Check Valve (Standard in Europe)
  • Stick Lowering Check Valve
  • Stick Lowering Check Valve (Standard in Europe)
  • Hydraulic Quick Coupler Lines (not available in all regions)
  • Hydraulic Quick Coupler Lines (not available in all regions)
  • Front Shovel Capable – Hydraulic Coupler

ELECTRICAL

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

GUARDING

  • Polycarbonate Half Height Front Guard (Canopy only)
  • Polycarbonate Front Guard (ISO 10262:1998 Level I and EN356 P5A)
  • Guard, Canopy
  • Guard, Mesh

OTHER

  • Bio Oil Capable
  • Eco Drain
  • Water Jacket Heater
  • Light Counterweight (100 kg/221 lb)
  • Bio Oil Capable
  • Extra Counterweight (250 kg/551 lb)
  • Eco Drain
  • Water Jacket Heater

Attachments