303 CR Mini Hydraulic Excavator



Technical Specifications
Benefits and Features
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The Cat® 303 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
Engine Model C1.1 Turbo
Stroke 3.2 in
Displacement 69 in³
Bore 3 in
Gross Power - 2,400 rpm - SAE J1995:2014 24.7 HP
Net Power - 2,400 rpm - ISO 9249, 80/1269/EEC 23.6 HP
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.
Operating Weight 7817 lb
EU: CE Plate Weight with Canopy*** 6791 lb
Minimum Operating Weight with Cab* 6924 lb
EU: CE Plate Weight with Cab*** 7012 lb
Maximum Operating Weight with Cab** 7817 lb
Note (1) *Minimum Weight is based on fixed rubber tracks, operator, full fuel tank, standard stick, blade, bucket and no extra counterweight.
Minimum Operating Weight with Canopy* 6670 lb
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.
Maximum Operating Weight with Canopy** 7552 lb
Note (2) **Maximum Weight is based on steel tracks, operator, full fuel tank, long stick, blade, bucket and extra counterweight.
Dimensions - Long Stick
Dig Depth 116.1 in
Tail Swing with Counterweight 35 in
Ground Clearance 12.2 in
Boom Height - Shipping Position 75.6 in
Track Belt/Shoe Width 11.8 in
Maximum Reach 206.3 in
Boom In Reach 74.2 in
Boom Swing - Right 34.3 in
Tail Swing 33.3 in
Maximum Dump Clearance 130.3 in
O/A Undercarriage Length 81.5 in
O/A Shipping Height 97.6 in
Track Width - Expanded 61 in
Maximum Blade Depth 21.1 in
Maximum Reach - Ground Level 201.2 in
Stick Length 61.4 in
Overall Shipping Length* 179.5 in
Maximum Dig Height 183.1 in
Swing Bearing - Height 22.4 in
Note *Overall Shipping Length depends on blade position during shipment.
Tail Swing without Counterweight 30.5 in
Maximum Blade Height 15.2 in
Boom Swing - Left 25.2 in
Vertical Wall 81.5 in
Height 13.8 in
Width 61 in
Service Refill Capacities
Fuel Tank 11.9 gal (US)
Cooling System 1.1 gal (US)
Hydraulic Tank 4.8 gal (US)
Engine Oil 1.1 gal (US)
Hydraulic System 9.2 gal (US)
Dimensions - Standard Stick
Maximum Blade Depth 21.1 in
Tail Swing without Counterweight 30.5 in
Maximum Dig Height 177.6 in
O/A Undercarriage Length 81.5 in
Tail Swing with Extra Counterweight 35 in
Boom Height - Shipping Position 63 in
Vertical Wall 71.7 in
Ground Clearance 12.2 in
Overall Shipping Length* 177.6 in
Boom Swing - Left 25.2 in
O/A Shipping Height 97.6 in
Track Shoe Width 61 in
Boom Swing - Right 34.3 in
Swing Bearing - Height 22.4 in
Tail Swing 33.3 in
Maximum Blade Height 15.2 in
Dig Depth 104.3 in
Maximum Dump Clearance 124.8 in
Maximum Reach - Ground Level 190.2 in
Maximum Reach 196.1 in
Track Belt/Shoe Width 11.8 in
Boom In Reach 68.9 in
Stick Length 49.6 in
Note *Overall Shipping Length depends on blade position during shipment.
Swing System
Boom Swing - Right 50 °
Boom Swing - Left 75 °
Machine Swing Speed 9 r/min
Weight Increase from Minimum Configuration
Counterweight 221 lb
Cab 254 lb
Extra Counterweight 551 lb
Steel Tracks 276 lb
Long Stick 55 lb
Average Exterior Sound Pressure (ISO 6395:2008) 94 dB(A)
Operator Sound Pressure (ISO 6396:2008) 78 dB(A)
Note European Union Directive “2000/14/EC”
Hydraulic System
Auxiliary Circuit - Primary - Flow 17 gal/min
Auxiliary Circuit - Secondary - Pressure 3553 psi
Operating Pressure - Swing 2553 psi
Pump Flow at 2,400 rpm 26 gal/min
Type Load Sensing Hydraulics with Variable Displacement Piston Pump
Digging Force - Stick - Standard 3732 lbf
Operating Pressure - Travel 3553 psi
Digging Force - Bucket 6385 lbf
Operating Pressure - Equipment 3553 psi
Auxiliary Circuit - Primary - Pressure 3553 psi
Auxiliary Circuit - Secondary - Flow 7 gal/min
Digging Force - Stick - Long 3327 lbf
Note * Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Travel System
Gradeability - Maximum 30 degrees
Ground Pressure - Maximum Weight 4.7 psi
Ground Pressure - Minimum Weight 4 psi
Travel Speed - High 2.8 mile/h
Maximum Traction Force - Low Speed 7059 lbf
Travel Speed - Low 1.6 mile/h
Maximum Traction Force - High Speed 3305 lbf
Certification - Cab and Canopy
Roll Over Protective Structure (ROPS) ISO 12117-2:2008
Top Guard ISO 10262:1998 (Level I)
Tip Over Protective Structure (TOPS) ISO 12117:1997
Recyclability 95%


  • 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.


  • 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.


  • 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!


  • 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.


  • 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 with optional seat belt reminder system are just a couple of the safety features we’ve built into the machine.


  • 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.


  • 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.


  • Your Cat dealer is here to help you reach your business goals. From providing equipment solutions to operator training to service needs and beyond, your Cat dealer is ready to help.


  • The Cat® C1.1 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)

*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)

Standard Equipment:

  • Engine
    • Cat C1.1 Turbo 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
  • Guarding
    • Top Guard ISO 10262:1998 Level I
  • Operator Environment
    • Tilt-up Canopy or Tilt-Up Cab
    • ROPS – ISO 12117-2:2008
    • TOPS – ISO 12117:1997
    • Next Generation Advanced Monitor
      – Touch Screen
      – Site Reference System
      – High Definition Camera Capable (IP68 and IP69K)
      – Numeric Security Code
    • 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)
  • Undercarriage
    • Rubber Belt (300 mm/11.8 in wide)
    • Dozer Blade
    • Dozer Blade Float
    • Tie Downs on Track Frame
  • Boom, Stick And Linkages
    • One Piece Boom (2200 mm/86.6 in)
    • Standard Stick (1260 mm/49.6 in)
    • Front Shovel Capable – Hydraulic Coupler
    • 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)
    • Seat Belt Reminder System
  • 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)
  • Electrical
    • Battery Disconnect
    • Product Link PL243 (regulations apply)
    • Product Link PLE643 (regulations apply)
    • Travel Alarm (standard in some regions)
  • Guarding
    • Polycarbonate Front Guard (ISO 10262:1998 Level I and EN356 P5A)
    • Polycarbonate Half Height Front Guard (Canopy only)
  • Other
    • Bio Oil Capable
    • Eco Drain
    • Water Jacket Heater

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