Mini Excavators

303.5E2 CR Hydraulic Excavator

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303.5E2 CR Mini Hydraulic Excavator
Front View
Top View
Left View
Rear View
Bottom View
Right View
US
Metric

Overview

The Cat E2 Series Mini Hydraulic Excavators are designed to carry on the solid performance of their E Series predecessors, while adding even greater value for the customer. The new High Definition Hydraulic (HDH) System, redesigned operator station and enhanced digital control panel specially designed for Cat Mini Excavators – COMPASS (Complete, Operation, Maintenance, Performance And Security System) – are all standard features that improve performance and increase value.

Engine

Engine Model
Cat® C1.7
Net Power
23.50 hp
17.50 kW
Gross Power
24.80 hp
18.50 kW

Weights

Operating Weight
8209.00 lb
3723.00 kg
Operating Weight - With Cab
8209.00 lb
3723.00 kg

Engine

Bore
3.40 in
87.00 mm
Stroke
3.60 in
92.40 mm
Displacement
104.00 in3
1.70 L

Travel System

Travel Speed – High
2.90 mph
4.60 km/h
Travel Speed – Low
2.00 mph
3.20 km/h
Maximum Traction Force - High Speed
3822.00 lbf
17.00 kN
Maximum Traction Force - Low Speed
6992.00 lbf
31.10 kN

Hydraulic System

Pump Flow
26.40 gal/min
100.00 l/min
Operating Pressure - Equipment
3553.00 psi
245.00 bar
Operating Pressure - Travel
3553.00 psi
245.00 bar
Operating Pressure - Swing
3132.00 psi
216.00 bar
Auxiliary Circuit - Primary
18.50 gal/min
70.00 l/min
Auxiliary Circuit - Secondary
6.60 gal/min
25.00 l/min
Digging Force - Stick - Standard
4249.00 lbf
18.90 kN
Digging Force - Stick - Long
3799.00 lbf
16.90 kN

Swing System

Machine Swing Speed
10.00 rpm
10.00 rpm
Boom Swing - Left - Without Stop
80°
Boom Swing - Left - With Stop
55°
Swing - Right
50°

Blade

Width
70.00 in
1780.00 mm
Height
13.00 in
325.00 mm
Dig Depth
19.00 in
470.00 mm
Lift Height
16.00 in
400.00 mm

Service Refill Capacities

Cooling System
1.50 gal
5.50 L
Engine Oil
1.80 gal
7.00 L
Hydraulic Tank
11.20 gal
42.30 L
Fuel Tank
12.20 gal
46.00 L
Hydraulic System
17.20 gal
65.00 L

Engine

Net Power (ISO 9249)
23.50 hp
17.50 kW
Rated Net Power (ISO 9249)
23.50 hp
17.50 kW
Note
Cat C1.7 engine meets U.S. EPA Tier 4 Final/EU Stage IIIB emission standards.

Weights

Operating Weight with Canopy
7803.00 lb
3539.00 kg
Note
Weight includes rubber tracks, bucket, operator, full fuel and auxiliary lines.

Operating Specifications

Maximum Dig Depth
125.00 in
3180.00 mm

Travel System

Ground Pressure
4.60 psi
31.70 kPa

Hydraulic System

Digging Force = Bucket
7419.00 lbf
33.00 kN
Type
Load Sensing Hydraulics with Variable Displacement Piston Pump

Engine

Engine Model
Cat® C1.7
Net Power
23.50 HP
17.50 kW
Gross Power
24.80 HP
18.50 kW

Weights

Operating Weight
8209.00 lb
3723.00 kg

Engine

Bore
3.40 in
87.00 mm
Displacement
104.00 in³
1.70 l
Stroke
3.60 in
92.40 mm

Travel System

Travel Speed - High
2.90 mile/h
4.60 km/h
Travel Speed - Low
2.00 mile/h
3.20 km/h

Swing System

Machine Swing Speed
10.00 r/min
10.00 r/min

Blade

Width
70.00 in
1780.00 mm

Service Refill Capacities

Cooling System
1.50 gal (US)
5.50 l
Engine Oil
1.80 gal (US)
7.00 l
Hydraulic Tank
11.20 gal (US)
42.30 l
Fuel Tank
12.20 gal (US)
46.00 l
Hydraulic System
17.20 gal (US)
65.00 l

Travel System

Ground Pressure
4.60 psi
31.70 kPa

Engine

Net Power - ISO 9249
23.50 HP
17.50 kW
Note
Cat C1.7 engine meets U.S. EPA Tier 4 Final/EU Stage IIIB emission standards.
Rated Net Power - ISO 9249
23.50 HP
17.50 kW

Hydraulic System

Digging Force - Bucket
7419.00 lbf
33.00 kN
Note
Flow and pressure are not combinable. Under load, as flow rises pressure goes down.

Operating Specifications

Maximum Dig Depth
125.00 in
3180.00 mm

Weights

Note
Weight includes rubber tracks, bucket, operator, full fuel and auxiliary lines.
Operating Weight - With Canopy
7803.00 lb
3539.00 kg

Hydraulic System

Pump Flow at 2,200 rpm
26.40 gal/min
100.00 l/min
Maximum Auxiliary Circuit - Secondary - Flow at Pump
6.60 gal/min
25.00 l/min
Maximum Auxiliary Circuit - Primary - Pressure at Pump
3553.00 psi
24500.00 kPa
Maximum Auxiliary Circuit - Primary - Flow at Pump
15.90 gal/min
60.00 l/min
Maximum Auxiliary Circuit - Secondary - Pressure at Pump
3553.00 psi
24500.00 kPa
Features

Operator Station

 

Operation and Hydraulic Control

 

Engine

 

COMPASS Control Panel

 

Compact Radius Design

 

Undercarriage

 

Dozer Blade

 

Coupler and Work Tool Options

 

Serviceability and Support

 

Sales Features

Operator Station

Productivity with Comfort and Quality

Operation and Hydraulic Control

Pushing Performance to the Limit

Engine

Intelligent Operation

COMPASS Control Panel

Complete, Operation, Maintenance, Performance and Security System

Compact Radius Design

Ease of Transport, Access and Operation

Undercarriage

A Strong Foundation

Dozer Blade

Maximize your productivity

Coupler and Work Tool Options

Versatility for Any Application

Serviceability and Support

Maximized Uptime and Ease of Service
Standard Equipment
  • ENGINE
    • Cat C1.7 Tier 4 Final diesel engine
    • Automatic engine idle
    • Automatic engine shut-off
    • Automatic two speed travel
    • Fuel and water separator
  • HYDRAULIC SYSTEM
    • 1-way and 2-way (combined function)
    • Accumulator
    • Automatic swing parking brake
    • Auxiliary hydraulic lines
    • Adjustable auxiliary relief
    • Auxiliary line quick disconnects
    • Cat interlock system: hydraulic lockout
    • Continuous auxiliary flow
    • Ecology drain
    • Hydraulic oil cooler
    • High definition hydraulics
    • Load sensing/flow sharing
  • OPERATOR ENVIRONMENT
    • 100% pilot control ergonomic joysticks
    • Adjustable armrests
    • COMPASS: complete, operation, maintenance, performance and security system
      – Multiple languages
    • Cup holder
    • Hydraulic neutral lockout bar
    • Literature holder
    • Site reference system: leveling
    • Tool storage area
    • Travel control pedals with hand levers
    • Washable floor mat
  • UNDERCARRIAGE
    • Dozer blade with float function
    • Track, rubber belt, 300 mm (12 in) width
    • Tie down eyes on track frame
    • Towing eye on base frame
  • FRONT LINKAGE
    • 200 degree bucket rotation
    • Certified lifting eye on bucket linkage
    • Front shovel capable
    • Thumb ready stick
  • ELECTRICAL
    • 12 volt electrical system
    • 60 ampere alternator
    • 650 CCA maintenance free battery
    • Fuse box
    • Ignition key start/stop switch
    • Slow blow fuse
    • Warning horn
  • LIGHTS AND MIRRORS
    • Boom light with time delay capability
  • SAFETY AND SECURITY
    • Anti-theft system (compass)
    • Caterpillar Corporate “One Key” System
    • Door locks
    • Lockable fuel cap
    • Retractable seat belt
    • Roll Over Protective Structure (ROPS) (ISO 12117-2)
    • Tip Over Protective Structure (TOPS) (ISO 12117)
    • Top guard – ISO 10262 (Level 1)
    • Travel alarm
Optional Equipment
  • ENGINE
    • Engine block heater
  • HYDRAULIC SYSTEM
    • Quick coupler lines
    • Boom lowering check valve
    • Stick lowering check valve
    • Secondary auxiliary hydraulic lines
  • OPERATOR ENVIRONMENT
    • Cab:
      – Air conditioning
      – Heat
      – High back suspension seat
      – Interior light
      – Interlocking front window system
      – Radio
      – Windshield wiper
  • UNDERCARRIAGE
    • Power angle blade
    • Track, double grouser (steel), 300 mm (12 in)
  • FRONT LINKAGE
    • Quick coupler: manual or hydraulic
    • Thumb
    • Buckets
    • Full range of performance matched work tools
      – Auger, hammer, ripper
  • LIGHTS AND MIRRORS
    • Light, cab with time delay capability
    • Mirror, canopy right
    • Mirror, canopy left
    • Mirror, cab rear
  • SAFETY AND SECURITY
    • Battery disconnect
    • Beacon socket
    • Front wire mesh guard
    • Rearview camera
    • Vandal guard
  • TECHNOLOGY
    • Product Link™