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305 (5.7T)

305 (5.7T)

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Product specifications for 305 CR Mini Excavators

The Cat® 305 CR Mini Excavator delivers power and performance in a compact size to help you work in a wide range of applications.



Net Power 33.6 kW
Engine Model C1.7 Turbo
Displacement 1.662 l
Gross Power - 2,400 rpm - SAE J1995:2014 36.1 kW
Stroke 100 mm
Bore 84 mm
Net Power - 2,400 rpm - ISO 9249, 80/1269/EEC 33.6 kW
Note Advertised power is tested per the specified standard in effect at the time of manufacture.
Emissions Meets U.S. EPA Tier 4 Final and EU Stage V emissions standards.

Operating Weight 5754 kg
Note (2) **Maximum Weight is based on steel tracks with pads, operator, full fuel tank, long stick, straight blade, extra counterweight and no bucket.
Minimum Operating Weight with Cab* 5105 kg
Note (1) *Minimum Weight is based on rubber tracks, operator, full fuel tank, standard stick, straight blade, no bucket and no extra counterweight.
Minimum Operating Weight with Canopy* 5006 kg
Maximum Operating Weight with Canopy** 5665 kg
Maximum Operating Weight with Cab** 5764 kg
Dimensions - Long Stick

Dig Depth 3670 mm
Maximum Reach 5990 mm
O/A Shipping Height 2550 mm
Vertical Wall 2560 mm
Track Width 1980 mm
Overall Shipping Length* 5340 mm
Maximum Dump Clearance 3845 mm
Tail Swing with Counterweight 1200 mm
Boom Swing - Right 865 mm
Boom Swing - Left 24.2 °
Tail Swing without Counterweight 1095 mm
Track Belt/Shoe Width 400 mm
Maximum Reach - Ground Level 5835 mm
Stick Length 1601 mm
Swing Bearing - Height 619 mm
O/A Undercarriage Length 2580 mm
Boom In Reach 2580 mm
Maximum Blade Depth 650 mm
Maximum Blade Height 400 mm
Maximum Dig Height 5355 mm
Boom Height - Shipping Position 1895 mm
Note *Overall Shipping Length depends on blade position during shipment.
Ground Clearance 335 mm
Service Refill Capacities

Hydraulic Tank 60 l
Engine Oil 6 l
Hydraulic System 75 l
Fuel Tank 68 l
Cooling System 11 l
Swing System

Boom Swing - Left 72 Degrees
Machine Swing Speed 9 r/min
Boom Swing - Right 50 Degrees
Hydraulic System

Digging Force - Bucket 49.2 kN
Auxiliary Circuit - Secondary - Pressure 265 bar
Operating Pressure - Equipment 265 bar
Auxiliary Circuit - Secondary - Flow 28 l/min
Operating Pressure - Travel 265 bar
Type Load Sensing Hydraulics with Variable Displacement Piston Pump
Digging Force - Stick - Standard 28.3 kN
Auxiliary Circuit - Primary - Pressure 265 bar
Note Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Pump Flow at 2,400 rpm 133 l/min
Auxiliary Circuit - Primary - Flow 80 l/min
Operating Pressure - Swing 200 bar
Digging Force - Stick - Long 25.2 kN
Dimensions - Standard Stick

Tail Swing without Counterweight 1095 mm
Boom Swing - Left 615 mm
Boom Swing - Right 865 mm
Maximum Dig Height 5215 mm
Vertical Wall 2335 mm
Maximum Blade Height 400 mm
Swing Bearing - Height 619 mm
Boom Height - Shipping Position 1820 mm
Overall Shipping Length* 5305 mm
O/A Shipping Height 2550 mm
Dig Depth 3420 mm
Maximum Reach - Ground Level 5590 mm
Maximum Dump Clearance 3700 mm
Maximum Reach 5755 mm
Boom In Reach 2570 mm
Maximum Blade Depth 650 mm
Note *Overall Shipping Length depends on blade position during shipment.
O/A Undercarriage Length 2580 mm
Track Belt/Shoe Width 400 mm
Stick Length 1351 mm
Tail Swing with Counterweight 1200 mm
Ground Clearance 335 mm
Travel System

Maximum Traction Force - High Speed 24.7 kN
Travel Speed - High 5 km/h
Travel Speed - Low 2.8 km/h
Ground Pressure - Maximum Weight 32.2 kPa
Gradeability - Maximum 30 degrees
Ground Pressure - Minimum Weight 27.3 kPa
Maximum Traction Force - Low Speed 50.5 kN
Weight Increase from Minimum Configuration

Counterweight 242 kg
Angle Blade 92 kg
Long Stick 34 kg
Steel Tracks with Pads 375 kg

Angle Blade - Right 25 degrees
Angle Blade Width 1980 mm
Angle Blade Height 400 mm
Straight Blade Width 1980 mm
Straight Blade Height 390 mm
Angle Blade - Left 25 degrees
Certification - Cab and Canopy

Roll Over Protective Structure (ROPS) ISO 12117-2:2008
Top Guard ISO 10262:1998 Level I

Operator Sound Pressure (ISO 6396:2008) 76 dB(A)
Average Exterior Sound Pressure (ISO 6395:2008) 97 dB(A)
Note European Union Directive "2000/14/EC"

Recyclability 96%


  • Choose either a canopy (not available in some regions) or a sealed and pressurized cab which can be equipped with air conditioning, adjustable wrist rests, and a suspension seat 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 as an upgrade option.


  • 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. An angle blade is also an option for finished grading and easier backfilling applications.


  • 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.


  • 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.


  • 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)
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