303.5 CR Mini Excavator
303.5 CR
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
DOWNLOAD TECHNICAL SPECIFICATIONS
Specification
Value
Net Power
23.6 HP
Engine Model
C1.7
Bore
3.3 in
Net Power @ 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269
23.6 HP
Displacement
104 in³
Note
Net power is tested per ISO 9249 and 80/1269/EEC.
Gross Power - 2,400 rpm - SAE J1995
24.7 HP
Emissions
Meets U.S. EPA Tier 4 Final and EU Stage V emission standards.
Note (2)
Net 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.
Stroke
3.9 in
Specification
Value
Operating Weight
9239 lb
Minimum Operating Weight with Canopy*
7673 lb
EU: CE Plate Weight with Cab***
8004 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 Cab**
9239 lb
Maximum Operating Weight with Canopy**
8930 lb
EU: CE Plate Weight with Canopy***
7784 lb
Minimum Operating Weight with Cab*
7982 lb
Note (1)
* Minimum Weight is based on fixed rubber tracks, operator, full fuel tank, standard stick, blade, bucket and no extra counterweight.
Note (2)
**Maximum Weight is based on steel tracks, operator, full fuel tank, long stick, blade, bucket and extra counterweight.
Specification
Value
Dig Depth
122.4 in
Track Belt/Shoe Width
11.8 in
Maximum Reach
216.9 in
O/A Track Width
70.1 in
Maximum Blade Depth
21.1 in
Tail Swing without Counterweight
35 in
Stick Length
61.4 in
Swing Bearing - Height
22.2 in
Boom Swing - Left
640 mm
Overall Shipping Length*
190.9 in
Maximum Reach - Ground Level
211.8 in
Maximum Dump Clearance
141.7 in
Tail Swing with Counterweight
37.8 in
O/A Shipping Height
97.6 in
Note
*Overall Shipping Length depends on blade position during shipment.
Boom In Reach
73.2 in
Maximum Dig Height
197.6 in
Vertical Wall
94.1 in
Boom Height - Shipping Position
68.9 in
Maximum Blade Height
15.2 in
O/A Undercarriage Length
87.4 in
Boom Swing - Right
34.3 °
Ground Clearance
12.2 in
Specification
Value
Height
13.8 in
Width
70.1 in
Specification
Value
Boom Swing - Right
34.3 °
Tail Swing with Counterweight
37.8 in
Stick Length
49.6 in
Maximum Reach - Ground Level
202 in
Boom Swing - Left
25.2 °
Maximum Reach
207.5 in
Track Belt/Shoe Width
11.8 in
Maximum Dump Clearance
137.4 in
Swing Bearing - Height
22.2 in
Boom Height - Shipping Position
59.8 in
O/A Shipping Height
97.6 in
Overall Shipping Length*
189 in
Boom In Reach
69.3 in
Note
*Overall Shipping Length depends on blade position during shipment.
Tail Swing with Extra Counterweight
39.6 in
Maximum Dig Height
193.7 in
Vertical Wall
88.6 in
Dig Depth
110.6 in
O/A Undercarriage Length
87.4 in
Tail Swing without Counterweight
35 in
Maximum Blade Depth
21.1 in
Maximum Blade Height
15.2 in
Ground Clearance
12.2 in
Specification
Value
Cab
309 lb
Counterweight
221 lb
Steel Tracks
287 lb
Long Stick
44 lb
Angle Blade
353 lb
Extra Counterweight
551 lb
Specification
Value
Fuel Tank
11.9 gal (US)
Hydraulic Tank
5.3 gal (US)
Cooling System
1.8 gal (US)
Engine Oil
1.6 gal (US)
Hydraulic System
11.9 gal (US)
Specification
Value
Ground Pressure - Minimum Weight
4.3 psi
Maximum Traction Force - High Speed
3799 lbf
Maximum Traction Force - Low Speed
6969 lbf
Travel Speed - High
2.8 mile/h
Gradeability - Maximum
30 degrees
Travel Speed - Low
1.6 mile/h
Ground Pressure - Maximum Weight
5.2 psi
Specification
Value
Pump Flow at 2,400 rpm
26 gal/min
Auxiliary Circuit - Primary - Flow
18 gal/min
Operating Pressure - Swing
2625 psi
Type
Load Sensing Hydraulics with Variable Displacement Piston Pump
Auxiliary Circuit - Secondary - Pressure
3553 psi
Digging Force - Stick - Long
3799 lbf
Auxiliary Circuit - Secondary - Flow
7 gal/min
Digging Force - Bucket
7419 lbf
Operating Pressure - Travel
3553 psi
Operating Pressure - Equipment
3553 psi
Auxiliary Circuit - Primary - Pressure
3553 psi
Digging Force - Stick - Standard
4249 lbf
Note
*Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Specification
Value
Note
European Union Directive ‚ "2000/14/EC"
Operator Sound Pressure (ISO 6396:2008)
78 dB(A)
Average Exterior Sound Pressure (ISO 6395:2008)
94 dB(A)
Specification
Value
Machine Swing Speed
9 r/min
Boom Swing - Right
50 °
Boom Swing - Left
75 °
Specification
Value
Tail Swing with Extra Counterweight
39.6 in
Specification
Value
Roll Over Protective Structure (ROPS)
ISO 12117-2:2008
Tip Over Protective Structure (TOPS)
ISO 12117:1997
Top Guard
ISO 10262:1998 (Level I)
Specification
Value
Tail Swing with Extra Counterweight
39.6 in
Specification
Value
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 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.
  • 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)