ALL DAY COMFORT
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Caterpillar
303.5 CR Mini Hydraulic Excavator
Net Power
23.6 hp
17.6 kW
Operating Weight
9239 lb
4190 kg
Dig Depth
122.4 in
3110 mm
Overview
The upgraded 303.5 CR delivers power and performance in a wide range of applications. Faster transient speeds, coupled with exclusive features like stick steer joystick travel get you moving quickly and comfortably so you can focus on the task at hand.
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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.
Documents
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 | C1.7 C1.7 |
| Net Power @ 2,200 rpm – U.S. EPA Tier 4 Final/EU Stage V – ISO 9249/EEC 80/1269 | 23.6 hp 17.6 kW |
| Net Power – ISO 9249 | 24.7 hp 18.4 kW |
| Bore | 3.3 in 84 mm |
| Stroke | 3.9 in 100 mm |
| Displacement | 104 in³ 1.7 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 2,200 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 2,200 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 | 9239 lb 4190 kg |
| Minimum Operating Weight with Canopy* | 7673 lb 3480 kg |
| Maximum Operating Weight with Canopy** | 8930 lb 4050 kg |
| Minimum Operating Weight with Cab* | 7982 lb 3620 kg |
| Maximum Operating Weight with Cab** | 9239 lb 4190 kg |
| EU: CE Plate Weight with Canopy*** | 7784 lb 3530 kg |
| EU: CE Plate Weight with Cab*** | 8004 lb 3630 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 | 309 lb 140 kg |
| Counterweight | 221 lb 100 kg |
| Extra Counterweight | 551 lb 250 kg |
| Long Stick | 44 lb 20 kg |
| Steel Tracks | 287 lb 130 kg |
| Angle Blade | 353 lb 160 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 | 3799 lbf 16.9 kN |
| Maximum Traction Force – Low Speed | 6969 lbf 31 kN |
| Ground Pressure – Minimum Weight | 4.3 psi 29.6 kPa |
| Ground Pressure – Maximum Weight | 5.2 psi 35.7 kPa |
| Gradeability – Maximum | 30 degrees 30 degrees |
Service Refill Capacities
| Spec | Value |
|---|---|
| Cooling System | 1.8 gal (US) 7 l |
| Engine Oil | 1.6 gal (US) 6 l |
| Fuel Tank | 11.9 gal (US) 45 l |
| Hydraulic Tank | 5.3 gal (US) 20 l |
| Hydraulic System | 11.9 gal (US) 45 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 | 2625 psi 181 bar |
| Auxiliary Circuit – Primary – Flow | 18 gpm 70 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 | 4249 lbf 18.9 kN |
| Digging Force – Stick – Long | 3799 lbf 16.9 kN |
| Digging Force – Bucket | 7419 lbf 33 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 | 70.1 in 1780 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 | 110.6 in 2810 mm |
| Vertical Wall | 88.6 in 2250 mm |
| Maximum Reach – Ground Level | 202 in 5130 mm |
| Maximum Reach | 207.5 in 5270 mm |
| Maximum Dig Height | 193.7 in 4920 mm |
| Maximum Dump Clearance | 137.4 in 3490 mm |
| Boom In Reach | 69.3 in 1760 mm |
| Tail Swing without Counterweight | 35 in 890 mm |
| Tail Swing with Extra Counterweight | 39.6 in 1005 mm |
| Maximum Blade Depth | 21.1 in 535 mm |
| Maximum Blade Height | 15.2 in 385 mm |
| Boom Height – Shipping Position | 59.8 in 1520 mm |
| O/A Shipping Height | 97.6 in 2480 mm |
| Swing Bearing – Height | 22.2 in 565 mm |
| O/A Undercarriage Length | 87.4 in 2220 mm |
| Overall Shipping Length* | 189 in 4800 mm |
| Boom Swing – Right | 34.3 ° 870 mm |
| Boom Swing – Left | 25.2 ° 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 | 122.4 in 3110 mm |
| Vertical Wall | 94.1 in 2390 mm |
| Maximum Reach – Ground Level | 211.8 in 5380 mm |
| Maximum Reach | 216.9 in 5510 mm |
| Maximum Dig Height | 197.6 in 5020 mm |
| Maximum Dump Clearance | 141.7 in 3600 mm |
| Boom In Reach | 73.2 in 1860 mm |
| Tail Swing without Counterweight | 35 in 890 mm |
| Tail Swing – with Extra Counterweight | 39.6 in 1005 mm |
| Maximum Blade Depth | 21.1 in 535 mm |
| Maximum Blade Height | 15.2 in 385 mm |
| Boom Height – Shipping Position | 68.9 in 1750 mm |
| O/A Shipping Height | 97.6 in 2480 mm |
| Swing Bearing – Height | 22.2 in 565 mm |
| O/A Undercarriage Length | 87.4 in 2220 mm |
| Overall Shipping Length* | 190.9 in 4850 mm |
| Boom Swing – Right | 34.3 ° 870 mm |
| Boom Swing – Left | 640 mm 25.2 ° |
| Track Belt/Shoe Width | 11.8 in 300 mm |
| Track Width | 70.1 in 1780 mm |
| Minimum Ground Clearance Below Undercarriage | 12.2 in 310 mm |
| Stick Length | 61.4 in 1560 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 C1.7 NA Engine (U.S. EPA Tier 4 Final/EU Stage V)
- Cat C1.7 NA 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
OPERATOR ENVIRONMENT
- Tilt-up Canopy or Tilt-Up Cab
- Stick Steer Mode
- Tilt-up Canopy or Tilt-Up Cab
- Travel Cruise Control
- Top Guard ISO 10262:1998 Level I
- Control Pattern Changer (optional in some regions)
- ROPS – ISO 12117-2:2008
- Adjustable Wrist Rests
- TOPS – ISO 12117:1997
- Washable Floor Mat
- 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)
Next Generation Advanced Monitor (Optional)
– 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
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
- Angle Blade
- Tie Downs on Track Frame
BOOM, STICK AND LINKAGES
- One Piece Boom (2400 mm/94.5 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 (2400 mm/94.5 in)
- Standard Stick (1260 mm/49.6 in)
- Front Shovel Capable – Pin-On
- Thumb Ready (not available in all regions)
- Certified Lifting Eye (optional in some regions)
GUARDING
- ROPS – ISO 12117-2:2008
- TOPS – ISO 12117:1997
- Top Guard ISO 10262:1998 (Level I)
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)
- Angle Blade
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)
- Front Shovel Capable – Hydraulic Coupler
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)
- Guard, Canopy
- Guard, Mesh
OTHER
- Bio Oil Capable
- Eco Drain
- Water Jacket Heater
- Bio Oil Capable
- Light Counterweight (100 kg/221 lb)
- Eco Drain
- Extra Counterweight (250 kg/551 lb)
- Water Jacket Heater
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