Overview
The Cat® 305 CR Mini Excavator delivers power and performance in a compact size to help you work in a wide range of applications.
Specifications
Units:
| Net Power | — |
| Operating Weight | — |
| Dig Depth | — |
Benefits & Features
ALL DAY COMFORT
- 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.
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 as an upgrade option.
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!
December 3, 2025
Specifications
Units:
| Air Conditioning | The 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). |
| Net Power | — |
| Engine Model | C1.7 Turbo |
| Displacement | — |
| Gross Power - 2,400 rpm - SAE J1995:2014 | — |
| Stroke | — |
| Bore | — |
| Net Power - 2,400 rpm - ISO 9249, 80/1269/EEC | — |
| 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 | — |
| 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* | — |
| 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* | — |
| Maximum Operating Weight with Canopy** | — |
| Maximum Operating Weight with Cab** | — |
| Dig Depth | — |
| Maximum Reach | — |
| O/A Shipping Height | — |
| Vertical Wall | — |
| Track Width | — |
| Overall Shipping Length* | — |
| Maximum Dump Clearance | — |
| Tail Swing with Counterweight | — |
| Boom Swing - Right | — |
| Boom Swing - Left | — |
| Tail Swing without Counterweight | — |
| Track Belt/Shoe Width | — |
| Maximum Reach - Ground Level | — |
| Stick Length | — |
| Swing Bearing - Height | — |
| O/A Undercarriage Length | — |
| Boom In Reach | — |
| Maximum Blade Depth | — |
| Maximum Blade Height | — |
| Maximum Dig Height | — |
| Boom Height - Shipping Position | — |
| Note | *Overall Shipping Length depends on blade position during shipment. |
| Ground Clearance | — |
| Hydraulic Tank | — |
| Engine Oil | — |
| Hydraulic System | — |
| Fuel Tank | — |
| Cooling System | — |
| Boom Swing - Left | 72 Degrees |
| Machine Swing Speed | — |
| Boom Swing - Right | 50 Degrees |
| Digging Force - Bucket | — |
| Auxiliary Circuit - Secondary - Pressure | — |
| Operating Pressure - Equipment | — |
| Auxiliary Circuit - Secondary - Flow | — |
| Operating Pressure - Travel | — |
| Type | Load Sensing Hydraulics with Variable Displacement Piston Pump |
| Digging Force - Stick - Standard | — |
| Auxiliary Circuit - Primary - Pressure | — |
| Note | Flow and pressure are not combinable. Under load, as flow rises pressure goes down. |
| Pump Flow at 2,400 rpm | — |
| Auxiliary Circuit - Primary - Flow | — |
| Operating Pressure - Swing | — |
| Digging Force - Stick - Long | — |
| Tail Swing without Counterweight | — |
| Boom Swing - Left | — |
| Boom Swing - Right | — |
| Maximum Dig Height | — |
| Vertical Wall | — |
| Maximum Blade Height | — |
| Swing Bearing - Height | — |
| Boom Height - Shipping Position | — |
| Overall Shipping Length* | — |
| O/A Shipping Height | — |
| Dig Depth | — |
| Maximum Reach - Ground Level | — |
| Maximum Dump Clearance | — |
| Maximum Reach | — |
| Boom In Reach | — |
| Maximum Blade Depth | — |
| Note | *Overall Shipping Length depends on blade position during shipment. |
| O/A Undercarriage Length | — |
| Track Belt/Shoe Width | — |
| Stick Length | — |
| Tail Swing with Counterweight | — |
| Ground Clearance | — |
| Maximum Traction Force - High Speed | — |
| Travel Speed - High | — |
| Travel Speed - Low | — |
| Ground Pressure - Maximum Weight | — |
| Gradeability - Maximum | 30 degrees |
| Ground Pressure - Minimum Weight | — |
| Maximum Traction Force - Low Speed | — |
| Counterweight | — |
| Angle Blade | — |
| Long Stick | — |
| Steel Tracks with Pads | — |
| Angle Blade - Right | 25 degrees |
| Angle Blade Width | — |
| Angle Blade Height | — |
| Straight Blade Width | — |
| Straight Blade Height | — |
| Angle Blade - Left | 25 degrees |
| Roll Over Protective Structure (ROPS) | ISO 12117-2:2008 |
| Top Guard | ISO 10262:1998 Level I |
| Operator Sound Pressure (ISO 6396:2008) | — |
| Average Exterior Sound Pressure (ISO 6395:2008) | — |
| Note | European Union Directive "2000/14/EC" |
| Recyclability | 96% |
Benefits & Features
ALL DAY COMFORT
- 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.
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 as an upgrade option.
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. An angle blade is also an option for finished grading and easier backfilling applications.
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 with optional seat belt reminder system 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.
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).
Data not available.
Standard Equipment
- GUARDING
- ROPS ISO 12117-2:2008
- Top Guard ISO 10262:1998 (Level I)
- ENGINE
- Cat® C1.7 Turbo Engine (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
- OPERATOR ENVIRONMENT
- Canopy or Cab (Canopy not available in some regions)
- Top Guard ISO 10262:1998 Level I
- ROPS – ISO 12117-2:2008
- TOPS – ISO 12117:1997
- 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 (not available in all regions)
- Utility Space for Mobile Phone
- Next Generation Color LCD Monitor (IP66)<br>– Fuel Level and Coolant Temperature Gauges<br>– Maintenance and Machine Monitoring<br>– Performance and Machine Adjustments<br>– Numeric Security Code<br>– Multiple Languages<br>– Hour Meter with Wake Up Switch<br>– Jog Dial (cab only)
- UNDERCARRIAGE
- Rubber Belt (400 mm/15.7 in)
- Dozer Straight Blade
- Dozer Blade Float
- Tie Downs on Track Frame
- BOOM, STICK AND LINKAGES
- One Piece Boom (2716 mm/106.9 in)
- Standard Stick (1351 mm/53.2 in)
- Front Shovel Capable – Pin-On
- Thumb Ready
- Certified Lifting Eye
- ELECTRICAL
- 12 Volt Battery
- Software (machine and monitor)
- Maintenance Free Battery
- Battery Disconnect
- 12 Volt Power Socket
- Travel Alarm (optional in some regions)
Optional Equipment
- OPERATOR ENVIRONMENT
- Cab with Air Conditioning
- Cab with Heater
- No Travel Pedals and Hand Levers (optional in some regions)
- Machine Security – Push to Start with Key Fob/Pass Code
- LED Front Lights
- LED Front and Rear Lights
- LED Boom Light
- Mirrors, Left, Right and Rear
- Camera
- Radio – Bluetooth®, Auxiliary, Microphone, USB (charging only) (Cab only)
- Next Generation Advanced Monitor<br>– Touch Screen<br>– Site Reference System<br>– High Definition Camera Capable (IP68 and IP69K)<br>– Numeric Security Code
- Seat Belt Reminder System
- Cat Grade with 3D
- Cat Grade with Advanced 2D
- UNDERCARRIAGE
- Steel Track (400 mm/15.7 in)
- Steel Track with Rubber Pads
- Angle Blade
- BOOM, STICK AND LINKAGES
- Long Stick (1601 mm/63.0 in)
- Front Shovel Capable – Dual Lock Manual Coupler
- Front Shovel Capable – Hydraulic Coupler
- Attachments including Couplers, Thumbs, Buckets, Augers and Hammers
- 2nd Auxiliary Hydraulic Lines
- Bucket Divert Lines
- Boom Lowering Check Valve
- Stick Lowering Check Valve
- Hydraulic Quick Coupler Lines
- ELECTRICAL
- Product Link™ PL243 (regulations apply)
- Product Link PLE643 (regulations apply)
- GUARDING
- Top Guard ISO 10262:1998 (Level II) (Cab)
- Front Guard (Mesh) ISO 10262:1998 (Level I) (Cab)
- Front Guard (Heavy Duty) ISO 10262:1998 (Level II) (Cab)
- Front Guard (Mesh) ISO 10262:1998 (Level I) (Canopy
- Front Guard (Heavy Duty) ISO 10262:1998 (Level II) (Canopy)
- OTHER
- Bio Oil Capable
- Eco Drain
- Water Jacket Heater
- Counterweight (242 kg/534 lb)
Related Products
Units:
Augers
Designed to drill holes for footings, fencing, signs and trees.
| Model | Drive Shaft Torque at Maximum Pressure | ||
|---|---|---|---|
| A68. 5 Ton Mini Excavators | — | Gerotor Motor - Double Planetary Reduction | 5 Ton Mini Excavator Pin On |
| A41, 5 Ton Mini Excavators | — | Gerotor Motor - Single Planetary Reduction | 5 Ton Mini Excavator Pin On |
Ditch Cleaning Buckets - Mini Excavator
Used in ditch cleaning, sloping, grading and other finishing work.
| Model | Width | ||
|---|---|---|---|
| 1000 mm (39 in), 170 L (6 ft3), Pin On | — | — | — |
| 1300 mm (51 in), 220 L (7.8 ft3), Pin On | — | — | — |
| 1600 mm (63 in), 280 L (9.9 ft3), Pin On | — | — | — |
Flail Mowers
Flail Mowers are ideal for efficient cutting and mulching of vegetation and overgrowth.
| Model | Working Width | ||
|---|---|---|---|
| HMF110 | — | Standard Flow | — |
Grading Buckets - Mini Excavator
For cleaning ditches, sloping, grading and other finishing work.
| Model | Width | ||
|---|---|---|---|
| 1200 mm (47 in) | — | — | — |
| 1500 mm (59 in) | — | — | — |
Heavy Duty Buckets - Mini Excavator
High strength buckets designed for maximum performance and value over a broad range of applications.
Pallet Fork Carriages
For moving palletized loads on construction sites, handling bagged fertilizer and seed at landscaping and nursery sites.
| Model | Height | ||
|---|---|---|---|
| 1300 mm (51 in), Skid Steer Coupler, Class II | — | — | — |
Single Shank Rippers
For land clearing or site preparation in rock, quarry work and similar high-impact digging applications. Combine with a coupler for Rip & Load productivity.
| Model | Shank Length | ||
|---|---|---|---|
| 676 mm (27 in), 5-6 Ton Mini Excavators | — | — | — |