303.5 CR
303.5 CR
An extensive line of Cat® mini hydraulic excavators offers the performance to dig in and be productive on every job.
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Specifications
Air Conditioning System
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Air ConditioningThe 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).
Blade
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Width70.1 in 1780 mm
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Height13.8 in 350 mm
Certification - Cab and Canopy
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Roll Over Protective Structure (ROPS)ISO 12117-2:2008
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Tip Over Protective Structure (TOPS)ISO 12117:1997
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Top GuardISO 10262:1998 (Level I)
Dimensions - Long Stick
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Dig Depth122.4 in 3110 mm
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Vertical Wall94.1 in 2390 mm
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Maximum Reach - Ground Level211.8 in 5380 mm
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Maximum Reach216.9 in 5510 mm
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Maximum Dig Height197.6 in 5020 mm
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Maximum Dump Clearance141.7 in 3600 mm
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Boom In Reach73.2 in 1860 mm
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Tail Swing without Counterweight35 in 890 mm
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Tail Swing - with Extra Counterweight39.6 in 1005 mm
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Maximum Blade Depth21.1 in 535 mm
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Maximum Blade Height15.2 in 385 mm
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Boom Height - Shipping Position68.9 in 1750 mm
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O/A Shipping Height97.6 in 2480 mm
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Swing Bearing - Height22.2 in 565 mm
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O/A Undercarriage Length87.4 in 2220 mm
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Overall Shipping Length*190.9 in 4850 mm
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Boom Swing - Right34.3 ° 870 mm
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Boom Swing - Left640 mm 25.2 °
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Track Belt/Shoe Width11.8 in 300 mm
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Track Width70.1 in 1780 mm
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Minimum Ground Clearance Below Undercarriage12.2 in 310 mm
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Stick Length61.4 in 1560 mm
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Note*Overall Shipping Length depends on blade position during shipment.
Dimensions - Standard Stick
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Dig Depth110.6 in 2810 mm
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Vertical Wall88.6 in 2250 mm
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Maximum Reach - Ground Level202 in 5130 mm
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Maximum Reach207.5 in 5270 mm
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Maximum Dig Height193.7 in 4920 mm
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Maximum Dump Clearance137.4 in 3490 mm
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Boom In Reach69.3 in 1760 mm
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Tail Swing without Counterweight35 in 890 mm
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Tail Swing with Extra Counterweight39.6 in 1005 mm
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Maximum Blade Depth21.1 in 535 mm
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Maximum Blade Height15.2 in 385 mm
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Boom Height - Shipping Position59.8 in 1520 mm
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O/A Shipping Height97.6 in 2480 mm
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Swing Bearing - Height22.2 in 565 mm
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O/A Undercarriage Length87.4 in 2220 mm
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Overall Shipping Length*189 in 4800 mm
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Boom Swing - Right34.3 ° 870 mm
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Boom Swing - Left25.2 ° 640 mm
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Track Belt/Shoe Width11.8 in 300 mm
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Minimum Ground Clearance Below Undercarriage12.2 in 310 mm
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Stick Length49.6 in 1260 mm
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Note*Overall Shipping Length depends on blade position during shipment.
Engine
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Net Power23.6 hp 17.6 kW
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Engine ModelC1.7
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Net Power @ 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/126923.6 hp 17.6 kW
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Net Power - ISO 924924.7 hp 18.4 kW
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Bore3.3 in 84 mm
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Stroke3.9 in 100 mm
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Displacement104 in³ 1.7 l
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EmissionsMeets U.S. EPA Tier 4 Final and EU Stage V emission standards.
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NoteAdvertised power is tested per the specified standard in effect at the time of manufacture.
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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.
Hydraulic System
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TypeLoad Sensing Hydraulics with Variable Displacement Piston Pump
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Pump Flow at 2,400 rpm26 gpm 100 L/min
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Operating Pressure - Equipment3553 psi 245 bar
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Operating Pressure - Travel3553 psi 245 bar
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Operating Pressure - Swing2625 psi 181 bar
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Auxiliary Circuit - Primary - Flow18 gpm 70 L/min
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Auxiliary Circuit - Primary - Pressure3553 psi 245 bar
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Auxiliary Circuit - Secondary - Flow7 gpm 25 L/min
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Auxiliary Circuit - Secondary - Pressure3553 psi 245 bar
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Digging Force - Stick - Standard4249 lbf 18.9 kN
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Digging Force - Stick - Long3799 lbf 16.9 kN
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Digging Force - Bucket7419 lbf 33 kN
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Note*Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Service Refill Capacities
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Cooling System1.8 gal (US) 7 l
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Engine Oil1.6 gal (US) 6 l
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Fuel Tank11.9 gal (US) 45 l
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Hydraulic Tank5.3 gal (US) 20 l
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Hydraulic System11.9 gal (US) 45 l
Sound
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Operator Sound Pressure (ISO 6396:2008)78 dB(A) 78 dB(A)
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Average Exterior Sound Pressure (ISO 6395:2008)94 dB(A) 94 dB(A)
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NoteEuropean Union Directive ‚ "2000/14/EC"
Sustainability
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Recyclability95%
Swing System
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Machine Swing Speed9 r/min 9 r/min
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Boom Swing - Left75 ° 75 °
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Boom Swing - Right50 ° 50 °
Travel System
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Travel Speed - High2.8 mile/h 4.5 km/h
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Travel Speed - Low1.6 mile/h 2.6 km/h
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Maximum Traction Force - High Speed3799 lbf 16.9 kN
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Maximum Traction Force - Low Speed6969 lbf 31 kN
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Ground Pressure - Minimum Weight4.3 psi 29.6 kPa
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Ground Pressure - Maximum Weight5.2 psi 35.7 kPa
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Gradeability - Maximum30 degrees
Weight Increase from Minimum Configuration
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Cab309 lb 140 kg
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Counterweight221 lb 100 kg
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Extra Counterweight551 lb 250 kg
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Long Stick44 lb 20 kg
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Steel Tracks287 lb 130 kg
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Angle Blade353 lb 160 kg
Weights
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Operating Weight9239 lb 4190 kg
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Minimum Operating Weight with Canopy*7673 lb 3480 kg
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Maximum Operating Weight with Canopy**8930 lb 4050 kg
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Minimum Operating Weight with Cab*7982 lb 3620 kg
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Maximum Operating Weight with Cab**9239 lb 4190 kg
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EU: CE Plate Weight with Canopy***7784 lb 3530 kg
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EU: CE Plate Weight with Cab***8004 lb 3630 kg
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Note (1)*Minimum Weight is based on fixed rubber tracks, operator, full fuel tank, standard stick, blade, no bucket and extra counterweight.
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Note (2)**Maximum Weight is based on steel tracks, operator, full fuel tank, long stick, blade, no bucket and extra counterweight.
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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.
Benefits
ALL DAY COMFORT
- 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
- 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
- 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
- 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
- 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
- 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
- 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
- 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).
Equipment Info
ENGINE
Cat C1.7 NA Engine (U.S. EPA Tier 4 Final/EU Stage V)
HYDRAULICS
Smart Tech Electronic Pump
OPERATOR ENVIRONMENT
Tilt-up Canopy or Tilt-Up Cab
UNDERCARRIAGE
Rubber Belt (300 mm/11.8 in wide)
BOOM, STICK AND LINKAGES
One Piece Boom (2400 mm/94.5 in)
GUARDING
ROPS – ISO 12117-2:2008
ELECTRICAL
12 Volt Battery