303.5E2 CR Hydraulic Excavator

303.5E2 CR Hydraulic Excavator

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


Operating Weight
8209 lb
Operating Weight with Cab
8209 lb
Operating Weight with Canopy
7803 lb
Weight includes rubber tracks, bucket, operator, full fuel and auxiliary lines.

Travel System

Travel Speed – High
2.9 mph
Travel Speed – Low
2.0 mph
Maximum Traction Force – High Speed
3822 lbf
Maximum Traction Force – Low Speed
6992 lbf
Ground Pressure
4.6 psi

Hydraulic System

Pump Flow
26.4 gal/min
Operating Pressure – Equipment
3553 psi
Operating Pressure – Travel
3553 psi
Operating Pressure – Swing
3132 psi
Auxiliary Circuit – Primary
18.5 gal/min
Auxiliary Circuit – Secondary
6.6 gal/min
Digging Force = Stick (standard)
4249 lbf
Digging Force = Stick (long)
3799 lbf
Digging Force = Bucket
7419 lbf
Load sensing hydraulics with variable displacement piston pump.

Swing System

Machine Swing Speed
10 rpm
Boom Swing – Left (without stop)
Boom Swing – Left (with stop)
Swing – Right


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

Service Refill Capacities

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

Operating Specifications

Maximum Dig Depth
125 in
  • 1-way and 2-way (combined function) auxiliary hydraulic lines
  • Adjustable auxiliary flow control for work tools
  • Adjustable wrist rests
  • Alternator
  • Anti-theft security system
  • Automatic engine idle
  • Automatic swing park brake
  • Automatic two speed travel
  • Auxiliary line quick disconnects
  • Boom cylinder guard
  • Cab mounted work light
  • Canopy with Top Guard ISO 10262 (Level 1), ROPS ISO 12117-2 and TOPS ISO 12117
  • Coat hook
  • COMPASS display panel
  • Cup holder
  • Continuous flow
  • Control pattern changer (not available in Europe)
  • Dozer blade with float function
  • Floor mat
  • Foot travel pedals
  • Horn
  • Hydraulic oil cooler
  • Lifting eye on bucket linkage (standard equipment for all regions except Europe)
  • Lockable storage box
  • Low maintenance linkage pin joints
  • Maintenance free battery
  • Rubber track
  • Retractable seatbelt
  • Stick
    • – Long stick (optional in Europe)
  • Suspension seat, vinyl covered
  • Thumb Ready sticks (standard equipment for all regions except Europe)
  • Travel alarm (optional in Europe)
  • Air conditioning
  • Angle dozer blade with float function
  • Beacon socket for canopy machines
  • Boom check valve (Europe only)
  • Boom mounted light
  • Cab, radio ready with Top Guard ISO 10262 (Level 1), ROPS ISO 12117-2 and TOPS ISO 12117 with heater/defroster, interior light and windshield wiper/washer
  • Ecology drain valve for hydraulic tank
  • High back suspension seat, fabric covered
  • Hydraulic quick coupler lines
  • Lifting eye on bucket linkage (optional in Europe, standard for all other regions)
  • Stick
    • – Standard stick (Europe only)
  • Mechanical quick coupler
  • Mirrors for cab and canopy
  • Seatbelt, 75 mm (3 in) wide (optional in Europe, standard in all other regions)
  • Secondary auxiliary hydraulic lines
  • Steel track and steel track with rubber pads