305 CR Mini Excavator
305 CR
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
45 HP
Operating Weight
12688 lb
Dig Depth
144.5 in
DOWNLOAD TECHNICAL SPECIFICATIONS
Specification
Value
Net Power
45 HP
Engine Model
C1.7 Turbo
Displacement
101 in³
Gross Power - 2,400 rpm - SAE J1995:2014
48.4 HP
Stroke
3.9 in
Bore
3.3 in
Net Power - 2,400 rpm - ISO 9249, 80/1269/EEC
45 HP
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.
Specification
Value
Operating Weight
12688 lb
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*
11257 lb
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*
11038 lb
Maximum Operating Weight with Canopy**
12491 lb
Maximum Operating Weight with Cab**
12710 lb
Specification
Value
Dig Depth
144.5 in
Maximum Reach
235.8 in
O/A Shipping Height
100.4 in
Vertical Wall
100.8 in
Track Width
78 in
Overall Shipping Length*
210.2 in
Maximum Dump Clearance
151.4 in
Tail Swing with Counterweight
47.2 in
Boom Swing - Right
34.1 °
Boom Swing - Left
615 mm
Tail Swing without Counterweight
43.1 in
Track Belt/Shoe Width
15.7 in
Maximum Reach - Ground Level
229.7 in
Stick Length
63 in
Swing Bearing - Height
24.4 in
O/A Undercarriage Length
101.6 in
Boom In Reach
101.6 in
Maximum Blade Depth
25.6 in
Maximum Blade Height
15.7 in
Maximum Dig Height
210.8 in
Boom Height - Shipping Position
74.6 in
Note
*Overall Shipping Length depends on blade position during shipment.
Ground Clearance
13.2 in
Specification
Value
Hydraulic Tank
16 gal (US)
Engine Oil
1.6 gal (US)
Hydraulic System
20 gal (US)
Fuel Tank
18 gal (US)
Cooling System
2.9 gal (US)
Specification
Value
Boom Swing - Left
72 Degrees
Machine Swing Speed
9 r/min
Boom Swing - Right
50 Degrees
Specification
Value
Digging Force - Bucket
11061 lbf
Auxiliary Circuit - Secondary - Pressure
3843 psi
Operating Pressure - Equipment
3843 psi
Auxiliary Circuit - Secondary - Flow
7 gal/min
Operating Pressure - Travel
3843 psi
Type
Load Sensing Hydraulics with Variable Displacement Piston Pump
Digging Force - Stick - Standard
6362 lbf
Auxiliary Circuit - Primary - Pressure
3843 psi
Note
Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Pump Flow at 2,400 rpm
35 gal/min
Auxiliary Circuit - Primary - Flow
21 gal/min
Operating Pressure - Swing
2901 psi
Digging Force - Stick - Long
5665 lbf
Specification
Value
Tail Swing without Counterweight
43.1 in
Boom Swing - Left
24.2 °
Boom Swing - Right
34.1 °
Maximum Dig Height
205.3 in
Vertical Wall
91.9 in
Maximum Blade Height
15.7 in
Swing Bearing - Height
24.4 in
Boom Height - Shipping Position
71.7 in
Overall Shipping Length*
208.9 in
O/A Shipping Height
100.4 in
Dig Depth
134.6 in
Maximum Reach - Ground Level
220.1 in
Maximum Dump Clearance
145.7 in
Maximum Reach
226.6 in
Boom In Reach
101.2 in
Maximum Blade Depth
25.6 in
Note
*Overall Shipping Length depends on blade position during shipment.
O/A Undercarriage Length
101.6 in
Track Belt/Shoe Width
15.7 in
Stick Length
53.2 in
Tail Swing with Counterweight
47.2 in
Ground Clearance
13.2 in
Specification
Value
Maximum Traction Force - High Speed
5553 lbf
Travel Speed - High
3.1 mile/h
Travel Speed - Low
1.7 mile/h
Ground Pressure - Maximum Weight
4.7 psi
Gradeability - Maximum
30 degrees
Ground Pressure - Minimum Weight
4 psi
Maximum Traction Force - Low Speed
11353 lbf
Specification
Value
Counterweight
534 lb
Angle Blade
203 lb
Long Stick
75 lb
Steel Tracks with Pads
827 lb
Specification
Value
Angle Blade - Right
25 degrees
Angle Blade Width
78 in
Angle Blade Height
15.7 in
Straight Blade Width
78 in
Straight Blade Height
15.4 in
Angle Blade - Left
25 degrees
Specification
Value
Roll Over Protective Structure (ROPS)
ISO 12117-2:2008
Top Guard
ISO 10262:1998 Level I
Specification
Value
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"
Specification
Value
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)