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303.5E2 CR Hydraulic Excavator 168971

Discontinued

303.5E2 CR Hydraulic Excavator
168971 303.5E2 CR Hydraulic Excavator

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.

CAT
Excavators
Price: Request a Quote

This model is no longer in production and is unavailable for purchase. It has been replaced by an upgraded version, which you can view here.

View new model

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.

Net Power
23.5 hp
Operating Weight
8,209 lb
Maximum Dig Depth
125 in
Operating Weight - With Cab
8,209 lb

Engine

Net Power
23.5 hp
Engine Model
Cat® C1.7
Gross Power
24.8 hp
Rated Net Power - ISO 9249
23.5 hp
Net Power - ISO 9249
23.5 hp
Note
Cat C1.7 engine meets U.S. EPA Tier 4 Final/EU Stage IIIB emission standards.
Bore
3.4 in
Displacement
104 in³
Stroke
3.6 in

Weights

Operating Weight
8,209 lb
Operating Weight - With Cab
8,209 lb
Operating Weight - With Canopy
7,803 lb
Note
Weight includes rubber tracks, bucket, operator, full fuel and auxiliary lines.

Operating Specifications

Maximum Dig Depth
125 in

Swing System

Machine Swing Speed
10 r/min
Boom Swing - Left - Without Stop
80°
Swing - Right
50°
Boom Swing - Left - With Stop
55°

Blade

Width
70 in
Height
13 in
Dig Depth
19 in
Lift Height
16 in

Service Refill Capacities

Cooling System
1.5 gal (US)
Engine Oil
1.8 gal (US)
Hydraulic Tank
11.2 gal (US)
Fuel Tank
12.2 gal (US)
Hydraulic System
17.2 gal (US)

Travel System

Ground Pressure
4.6 psi
Travel Speed - Low
2 mile/h
Maximum Traction Force - High Speed
3,822 lbf
Travel Speed - High
2.9 mile/h
Maximum Traction Force - Low Speed
6,992 lbf

Hydraulic System

Digging Force - Bucket
7,419 lbf
Pump Flow at 2,200 rpm
26.4 gal/min
Operating Pressure - Equipment
3,553 psi
Digging Force - Stick - Standard
4,249 lbf
Operating Pressure - Travel
3,553 psi
Operating Pressure - Swing
3,132 psi
Digging Force - Stick - Long
3,799 lbf
Type
Load Sensing Hydraulics with Variable Displacement Piston Pump
Note
Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Maximum Auxiliary Circuit - Secondary - Flow at Pump
6.6 gal/min
Maximum Auxiliary Circuit - Primary - Pressure at Pump
3,553 psi
Maximum Auxiliary Circuit - Primary - Flow at Pump
15.9 gal/min
Maximum Auxiliary Circuit - Secondary - Pressure at Pump
3,553 psi

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

Specifications

Engine

Net Power
23.5 hp
Engine Model
Cat® C1.7
Gross Power
24.8 hp
Rated Net Power - ISO 9249
23.5 hp
Net Power - ISO 9249
23.5 hp
Note
Cat C1.7 engine meets U.S. EPA Tier 4 Final/EU Stage IIIB emission standards.
Bore
3.4 in
Displacement
104 in³
Stroke
3.6 in

Weights

Operating Weight
8,209 lb
Operating Weight - With Cab
8,209 lb
Operating Weight - With Canopy
7,803 lb
Note
Weight includes rubber tracks, bucket, operator, full fuel and auxiliary lines.

Operating Specifications

Maximum Dig Depth
125 in

Swing System

Machine Swing Speed
10 r/min
Boom Swing - Left - Without Stop
80°
Swing - Right
50°
Boom Swing - Left - With Stop
55°

Blade

Width
70 in
Height
13 in
Dig Depth
19 in
Lift Height
16 in

Service Refill Capacities

Cooling System
1.5 gal (US)
Engine Oil
1.8 gal (US)
Hydraulic Tank
11.2 gal (US)
Fuel Tank
12.2 gal (US)
Hydraulic System
17.2 gal (US)

Travel System

Ground Pressure
4.6 psi
Travel Speed - Low
2 mile/h
Maximum Traction Force - High Speed
3,822 lbf
Travel Speed - High
2.9 mile/h
Maximum Traction Force - Low Speed
6,992 lbf

Hydraulic System

Digging Force - Bucket
7,419 lbf
Pump Flow at 2,200 rpm
26.4 gal/min
Operating Pressure - Equipment
3,553 psi
Digging Force - Stick - Standard
4,249 lbf
Operating Pressure - Travel
3,553 psi
Operating Pressure - Swing
3,132 psi
Digging Force - Stick - Long
3,799 lbf
Type
Load Sensing Hydraulics with Variable Displacement Piston Pump
Note
Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Maximum Auxiliary Circuit - Secondary - Flow at Pump
6.6 gal/min
Maximum Auxiliary Circuit - Primary - Pressure at Pump
3,553 psi
Maximum Auxiliary Circuit - Primary - Flow at Pump
15.9 gal/min
Maximum Auxiliary Circuit - Secondary - Pressure at Pump
3,553 psi

Standard/Optional Features

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

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