ALL DAY COMFORT
Main content
Caterpillar
303 CR Mini Hydraulic Excavator
Net Power
23.6 hp
17.6 kW
Operating Weight
7817 lb
3545 kg
Dig Depth
116.1 in
2950 mm
Overview
The Cat® 303 CR Mini Excavator delivers power and performance in a compact size to help you work in a wide range of applications.
Media
Photos
Videos
360° View
Exterior
Model shown represents features on all Cat® Mini Excavators except where indicated.
Interior
Model shown represents features on all Cat® Mini Excavators except where indicated.
Features
EASY TO OPERATE
STICK STEER TRAVEL MODE
BIG PERFORMANCE IN A COMPACT DESIGN
SAFETY ON THE JOB SITE
SIMPLE SERVICE FOR LESS DOWNTIME
LOWER OPERATING COSTS
SUSTAINABILITY
Details
Specifications
Engine
| Spec | Value |
|---|---|
| Net Power | 23.6 hp 17.6 kW |
| Engine Model | C1.1 Turbo C1.1 Turbo |
| Net Power – 2,400 rpm – ISO 9249, 80/1269/EEC | 23.6 hp 17.6 kW |
| Net Power – ISO 9249 | 24.7 hp 18.4 kW |
| Bore | 3 in 77 mm |
| Stroke | 3.2 in 81 mm |
| Displacement | 69 in³ 1.1 l |
| Emissions | Meets U.S. EPA Tier 4 Final and EU Stage V emission standards. Meets U.S. EPA Tier 4 Final and EU Stage V emission standards. |
| Note | Advertised power is tested per the specified standard in effect at the time of manufacture. Advertised power is tested per the specified standard in effect at the time of manufacture. |
| Note (1) | Net power advertised is the power available at the flywheel when the engine is at the rated speed of 2,400 rpm and the engine is installed with the factory configured fan, air intake system, exhaust system and alternator with a minimum alternator load. Net power advertised is the power available at the flywheel when the engine is at the rated speed of 2,400 rpm and the engine is installed with the factory configured fan, air intake system, exhaust system and alternator with a minimum alternator load. |
Weights
| Spec | Value |
|---|---|
| Operating Weight | 7817 lb 3545 kg |
| Minimum Operating Weight with Canopy* | 6670 lb 3025 kg |
| Maximum Operating Weight with Canopy** | 7552 lb 3425 kg |
| Minimum Operating Weight with Cab* | 6924 lb 3140 kg |
| Maximum Operating Weight with Cab** | 7817 lb 3545 kg |
| EU: CE Plate Weight with Canopy*** | 6791 lb 3080 kg |
| EU: CE Plate Weight with Cab*** | 7012 lb 3180 kg |
| Note (1) | *Minimum Weight is based on fixed rubber tracks, operator, full fuel tank, standard stick, blade, no bucket and extra counterweight. *Minimum Weight is based on fixed rubber tracks, operator, full fuel tank, standard stick, blade, no bucket and extra counterweight. |
| Note (2) | **Maximum Weight is based on steel tracks, operator, full fuel tank, long stick, blade, no bucket and extra counterweight. **Maximum Weight is based on steel tracks, operator, full fuel tank, long stick, blade, no bucket and extra counterweight. |
| 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. ***CE Plate Weight is based on the most common EU configuration. Includes 75 kg (165 lb) operator and full fuel tank and excludes bucket. |
Weight Increase from Minimum Configuration
| Spec | Value |
|---|---|
| Cab | 254 lb 115 kg |
| Counterweight | 221 lb 100 kg |
| Extra Counterweight | 551 lb 250 kg |
| Long Stick | 55 lb 25 kg |
| Steel Tracks | 276 lb 125 kg |
Travel System
| Spec | Value |
|---|---|
| Travel Speed – High | 2.8 mile/h 4.5 km/h |
| Travel Speed – Low | 1.6 mile/h 2.6 km/h |
| Maximum Traction Force – High Speed | 3305 lbf 14.7 kN |
| Maximum Traction Force – Low Speed | 7059 lbf 31.4 kN |
| Ground Pressure – Minimum Weight | 4 psi 27.6 kPa |
| Ground Pressure – Maximum Weight | 4.7 psi 32.3 kPa |
| Gradeability – Maximum | 30 degrees 30 degrees |
Service Refill Capacities
| Spec | Value |
|---|---|
| Cooling System | 1.1 gal (US) 4 l |
| Engine Oil | 1.1 gal (US) 4 l |
| Fuel Tank | 11.9 gal (US) 45 l |
| Hydraulic Tank | 4.8 gal (US) 18 l |
| Hydraulic System | 9.2 gal (US) 35 l |
Hydraulic System
| Spec | Value |
|---|---|
| Type | Load Sensing Hydraulics with Variable Displacement Piston Pump Load Sensing Hydraulics with Variable Displacement Piston Pump |
| Pump Flow at 2,400 rpm | 26 gpm 100 L/min |
| Operating Pressure – Equipment | 3553 psi 245 bar |
| Operating Pressure – Travel | 3553 psi 245 bar |
| Operating Pressure – Swing | 2553 psi 176 bar |
| Auxiliary Circuit – Primary – Flow | 17 gpm 65 L/min |
| Auxiliary Circuit – Primary – Pressure | 3553 psi 245 bar |
| Auxiliary Circuit – Secondary – Flow | 7 gpm 25 L/min |
| Auxiliary Circuit – Secondary – Pressure | 3553 psi 245 bar |
| Digging Force – Stick – Standard | 3732 lbf 16.6 kN |
| Digging Force – Stick – Long | 3327 lbf 14.8 kN |
| Digging Force – Bucket | 6385 lbf 28.4 kN |
| Note | * Flow and pressure are not combinable. Under load, as flow rises pressure goes down. * Flow and pressure are not combinable. Under load, as flow rises pressure goes down. |
Swing System
| Spec | Value |
|---|---|
| Machine Swing Speed | 9 r/min 9 r/min |
| Boom Swing – Left | 75 ° 75 ° |
| Boom Swing – Right | 50 ° 50 ° |
Blade
| Spec | Value |
|---|---|
| Width | 61 in 1550 mm |
| Height | 13.8 in 350 mm |
Certification - Cab and Canopy
| Spec | Value |
|---|---|
| Roll Over Protective Structure (ROPS) | ISO 12117-2:2008 ISO 12117-2:2008 |
| Tip Over Protective Structure (TOPS) | ISO 12117:1997 ISO 12117:1997 |
| Top Guard | ISO 10262:1998 (Level I) ISO 10262:1998 (Level I) |
Dimensions - Standard Stick
| Spec | Value |
|---|---|
| Dig Depth | 104.3 in 2650 mm |
| Vertical Wall | 71.7 in 1820 mm |
| Maximum Reach – Ground Level | 190.2 in 4830 mm |
| Maximum Reach | 196.1 in 4980 mm |
| Maximum Dig Height | 177.6 in 4510 mm |
| Maximum Dump Clearance | 124.8 in 3170 mm |
| Boom In Reach | 68.9 in 1750 mm |
| Tail Swing without Counterweight | 30.5 in 775 mm |
| Tail Swing with Extra Counterweight | 35 in 890 mm |
| Maximum Blade Depth | 21.1 in 535 mm |
| Maximum Blade Height | 15.2 in 385 mm |
| Boom Height – Shipping Position | 63 in 1600 mm |
| O/A Shipping Height | 97.6 in 2480 mm |
| Swing Bearing – Height | 22.4 in 570 mm |
| O/A Undercarriage Length | 81.5 in 2070 mm |
| Overall Shipping Length* | 177.6 in 4510 mm |
| Boom Swing – Right | 34.3 in 870 mm |
| Boom Swing – Left | 25.2 in 640 mm |
| Track Belt/Shoe Width | 11.8 in 300 mm |
| Minimum Ground Clearance Below Undercarriage | 12.2 in 310 mm |
| Stick Length | 49.6 in 1260 mm |
| Note | *Overall Shipping Length depends on blade position during shipment. *Overall Shipping Length depends on blade position during shipment. |
Dimensions - Long Stick
| Spec | Value |
|---|---|
| Dig Depth | 116.1 in 2950 mm |
| Vertical Wall | 81.5 in 2070 mm |
| Maximum Reach – Ground Level | 201.2 in 5110 mm |
| Maximum Reach | 206.3 in 5240 mm |
| Maximum Dig Height | 183.1 in 4650 mm |
| Maximum Dump Clearance | 130.3 in 3310 mm |
| Boom In Reach | 74.2 in 1910 mm |
| Tail Swing without Counterweight | 30.5 in 775 mm |
| Tail Swing – with Extra Counterweight | 35 in 890 mm |
| Maximum Blade Depth | 21.1 in 535 mm |
| Maximum Blade Height | 15.2 in 385 mm |
| Boom Height – Shipping Position | 75.6 in 1920 mm |
| O/A Shipping Height | 97.6 in 2480 mm |
| Swing Bearing – Height | 22.4 in 570 mm |
| O/A Undercarriage Length | 81.5 in 2070 mm |
| Overall Shipping Length* | 179.5 in 4560 mm |
| Boom Swing – Right | 34.3 in 870 mm |
| Boom Swing – Left | 25.2 in 640 mm |
| Track Belt/Shoe Width | 11.8 in 300 mm |
| Track Width | 61 in 1550 mm |
| Stick Length | 61.4 in 1560 mm |
| Minimum Ground Clearance Below Undercarriage | 12.2 in 310 mm |
| Note | *Overall Shipping Length depends on blade position during shipment. *Overall Shipping Length depends on blade position during shipment. |
Air Conditioning System
| Spec | Value |
|---|---|
| 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). 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). |
Sound
| Spec | Value |
|---|---|
| Operator Sound Pressure (ISO 6396:2008) | 78 dB(A) 78 dB(A) |
| Average Exterior Sound Pressure (ISO 6395:2008) | 94 dB(A) 94 dB(A) |
| Note | European Union Directive “2000/14/EC” European Union Directive “2000/14/EC” |
Sustainability
| Spec | Value |
|---|---|
| Recyclability | 95% 95% |
Standard Equipment
ENGINE
- Cat C1.1 Turbo Engine (U.S. EPA Tier 4 Final/EU Stage V)
- Cat C1.1 Turbo Engine (U.S. EPA Tier 4 Final/EU Stage V)
- Automatic Engine Idle
- Automatic Engine Idle
- Automatic Engine Shutdown
- Automatic Engine Shutdown
- Automatic Two Speed Travel
- Automatic Two Speed Travel
- Fuel Water Separator
- Fuel Water Separator
- Power on Demand (not available in all regions)
- Power on Demand (not available in all regions)
- Variable Displacement Piston Pump
- Variable Displacement Piston Pump
- Load Sensing/Flow Sharing Hydraulics
- Load Sensing/Flow Sharing Hydraulics
HYDRAULICS
- Smart Tech Electronic Pump
- Accumulator
- Smart Tech Electronic Pump
- Automatic Swing Brake
- Accumulator
- Auxiliary Line Quick Disconnects
- Automatic Swing Brake
- One and Two Way Auxiliary Flow
- Auxiliary Hydraulic Lines
- Continuous Auxiliary Flow
- One and Two Way Auxiliary Flow
- Auxiliary Hydraulic Lines
- Continuous Auxiliary Flow
- Auxiliary Line Quick Disconnects
GUARDING
- Top Guard ISO 10262:1998 Level I
- ROPS – ISO 12117-2:2008
- TOPS – ISO 12117:1997
- Top Guard ISO 10262:1998 (Level I)
OPERATOR ENVIRONMENT
- Tilt-up Canopy or Tilt-Up Cab
- Stick Steer Mode
- Tilt-up Canopy or Tilt-Up Cab
- Travel Cruise Control
- Control Pattern Changer (optional in some regions)
- ROPS – ISO 12117-2:2008
- Adjustable Wrist Rests
- TOPS – ISO 12117:1997
- Washable Floor Mat
- Next Generation Advanced Monitor
– Touch Screen
– Site Reference System
– High Definition Camera Capable (IP68 and IP69K)
– Numeric Security Code - Travel Pedals and Hand Levers
- Stick Steer Mode
- Machine Security
- Travel Cruise Control
- Machine Security – Standard Key with Pass Code
- Control Pattern Changer (optional in some regions)
- Fabric Suspension Seat (Cab only)
- Adjustable Wrist Rests
- Vinyl Suspension Seat (Canopy only)
- Washable Floor Mat
- Hydraulic Lockout – All Controls
- Travel Pedals and Hand Levers
- Retractable High Visibility Seat Belt (75 mm/3 in)
- Machine Security
- Coat Hook
- Machine Security – Standard Key with Pass Code
- Cup Holder
- Fabric Suspension Seat (Cab only)
- Storage Pocket
- Vinyl Suspension Seat (Canopy only)
- Skylight
- Hydraulic Lockout – All Controls
- Mounting Bosses for Front
- Retractable High Visibility Seat Belt (75 mm/3 in)
- Signaling/Warning Horn
- Coat Hook
- Interior Light (Cab only)
- Cup Holder
- Boom Light, Halogen (not available in all regions)
- Storage Pocket
- Utility Space for Mobile Phone
- Skylight
- Next Generation Color LCD Monitor (IP66)
– Fuel Level and Coolant Temperature Gauges
– Maintenance and Machine Monitoring
– Performance and Machine Adjustments
– Numeric Security Code
– Multiple Languages
– Hour Meter with Wake Up Switch
– Jog Dial (cab only) - Mounting Bosses for Front
- Signaling/Warning Horn
- Interior Light (Cab only)
- Boom Light, Halogen
- Utility Space for Mobile Phone
- Next Generation Color LCD Monitor (IP66)
– Fuel Level and Coolant Temperature Gauges
– Maintenance and Machine Monitoring
– Performance and Machine Adjustments
– Numeric Security Code
– Multiple Languages
– Hour Meter with Wake Up Switch
– Jog Dial (cab only)
UNDERCARRIAGE
- Rubber Belt (300 mm/11.8 in wide)
- Dozer Blade
- Dozer Blade Float
- Tie Downs on Track Frame
- Rubber Belt (300 mm/11.8 in wide)
- Dozer Blade
- Dozer Blade Float
- Tie Downs on Track Frame
BOOM, STICK AND LINKAGES
- One Piece Boom (2200 mm/86.6 in)
- Standard Stick (1260 mm/49.6 in)
- Front Shovel Capable
- Front Shovel Capable – Pin-On
- Thumb Ready (not available in all regions)
- Certified Lifting Eye (optional in some regions)
- One Piece Boom (2200 mm/86.6 in)
- Standard Stick (1260 mm/49.6 in)
- Front Shovel Capable – Hydraulic Coupler
- Front Shovel Capable – Pin-On
- Thumb Ready (not available in all regions)
- Certified Lifting Eye (optional in some regions)
ELECTRICAL
- 12 Volt Battery
- Software (machine and monitor)
- Maintenance Free Battery
- Lock Out/Tag Out Battery Disconnect
- Signaling/Warning Horn
- 12 Volt Power Socket
- 12 Volt Battery
- Software (machine and monitor)
- Maintenance Free Battery
- Signaling/Warning Horn
- 12 Volt Power Socket
Optional Equipment
OPERATOR ENVIRONMENT
- Cab with Air Conditioning
- Cab with Air Conditioning
- Cab with Heater
- Cab with Heater
- Control Pattern Changer (optional in some regions)
- Control Pattern Changer (optional in some regions)
- No Travel Pedals and Hand Levers
- No Travel Pedals and Hand Levers
- Machine Security – Push to Start with Key Fob/Pass Code
- Machine Security – Push to Start with Key Fob/Pass Code
- Vinyl Non-Suspension Seat (Canopy only)
- Vinyl Non-Suspension Seat (Canopy only)
- Seat Belt Reminder System
- LED Front Lights
- LED Front Lights
- LED Front and Rear Lights
- LED Front and Rear Lights
- LED Boom Light
- LED Boom Light
- Mirrors Left and Right
- Mirrors Left and Right
- Radio – Bluetooth®, Auxiliary, Microphone, USB (charging only) (Cab only)
- Radio – Bluetooth®, Auxiliary, Microphone, USB (charging only) (Cab only)
Next Generation Advanced Monitor
– Touch Screen
– Site Reference System
– High Definition Camera Capable (IP68 and IP69K)
– Numeric Security Code
UNDERCARRIAGE
- Steel Track (300 mm/11.8 in wide)
- Steel Track (300 mm/11.8 in wide)
BOOM, STICK AND LINKAGES
- Long Stick (1560 mm/61.4 in)
- Long Stick (1560 mm/61.4 in)
- Front Shovel Capable – Dual Lock Manual Coupler
- Front Shovel Capable – Dual Lock Manual Coupler
- Attachments including Couplers, Thumbs, Buckets, Augers and Hammers
- Front Shovel Capable – Hydraulic Coupler
- 2nd Auxiliary Hydraulic Lines
- 2nd Auxiliary Hydraulic Lines
- Boom Lowering Check Valve
- Attachments including Couplers, Thumbs, Buckets, Augers and Hammers
- Stick Lowering Check Valve
- Boom Lowering Check Valve (Standard in Europe)
- Hydraulic Quick Coupler Lines (not available in all regions)
- Stick Lowering Check Valve (Standard in Europe)
- Hydraulic Quick Coupler Lines (not available in all regions)
ELECTRICAL
- Battery Disconnect
- Product Link PL243 (regulations apply)
- Product Link PL243 (regulations apply)
- Product Link PLE643 (regulations apply)
- Product Link PLE643 (regulations apply)
- Travel Alarm (standard in some regions)
- Travel Alarm (standard in some regions)
GUARDING
- Polycarbonate Half Height Front Guard (Canopy only)
- Polycarbonate Front Guard (ISO 10262:1998 Level I and EN356 P5A)
- Polycarbonate Front Guard (ISO 10262:1998 Level I and EN356 P5A)
- Polycarbonate Half Height Front Guard (Canopy only)
OTHER
- Bio Oil Capable
- Eco Drain
- Water Jacket Heater
- Bio Oil Capable
- Eco Drain
- Water Jacket Heater
Related Products
Heavy Duty Buckets - Mini Excavator
Augers
Ditch Cleaning Buckets - Mini Excavator
Dual Lock™ Pin Grabber Couplers - Mini Excavator
Single Shank Rippers
305 mm (12 in), 48 L (1.7 ft3), Pin On, 40 mm (1.6 in)
406 mm (16 in), 71 L (2.5 ft3), Pin On, 40 mm (1.6 in)
508 mm (20 in), 93 L (3.3 ft3), Pin On, 40 mm (1.6 in)
619 mm (24 in), 119 L (4.2 ft3), Pin On, 40 mm (1.6 in)
914 mm (36 in), 200 L (7.1 ft3), Pin On, 40 mm (1.6 in)
A23, 3 Ton Mini Excavators
A41, 3 Ton Mini Excavators
1000 mm (40 in), 136 L (4.8 ft3), Pin On
1400 mm (55 in), 197 L (7 ft3), Pin On
1200 mm (47 in), 167 L (5.9 ft3), Pin On
3-4 Ton Mini Excavators Hydraulic
490 mm (19 in), 3-4 Ton Mini Excavators