• EQUIPMENT
  • ATTACHMENTS
  • POWER SYSTEMS
  • TECHNOLOGY
  • AGRICULTURE

Articulated Trucks

Asphalt Pavers

Backhoe Loaders

Cold Planers

Compactors

Dozers

Draglines

Electric Rope Shovels

Excavators

Forest Machines

Hydraulic Mining Shovels

Lift Trucks

Material Handlers

Mobile Track Solutions

Motor Graders

Off-Highway Trucks

Pavers

Pipelayers

Road Reclaimers

Skid Steer and Compact Track Loaders

Telehandlers

Track Loaders

Trailers

Underground Mining

Wheel Loaders

Wheel Tractor-Scrapers

Augers

Bale Grabs

Bale Spears

Blades

Brooms

Brushcutters

Buckets

Cold Planers

Compactors

Couplers

Flail Mowers

Forks

Generator Set Enclosures

Grapples

Ground Engaging Tools

Hammers

Material Handling

Mulchers

Multi-Processors

Pulverizers

Rakes

Rippers

Shears

Silage Defacers

Snow Pushes

Stump Grinders

Tillers

Trenchers

Water Delivery System

Winches

Electric Power

Industrial

Marine Power Systems

APS Products

Digital Tools

Construction Technology

CAT Connect Technology

CAT Connect Services

Remote Asset Monitoring

Agriculture Technology

Visit ALTORFERAG.COM for all of your agriculture equipment needs

DEALS noun_chevron_25366 USED noun_chevron_25366 RENTALS noun_chevron_25366
Financing
Service Request
Locations
Cat Rental Online
Locations
Careers

305 SR

The Cat® 305 SR Mini Hydraulic Excavator delivers high performance, durability and versatility in a compact design to help you work in a variety of applications.

Get a Quote
Net Power 69.5 HP
Net Power - 2,200 rpm - ISO 9249:2007, 80/1269/EEC 69.5 HP
Bore 3.7 in
Gross Power - SAE J1995 74.3 HP
Stroke 4.7 in
Displacement 203 in³
Operating Weight 20385 lb
Minimum Operating Weight with Standard Stick* 19084 lb
Maximum Operating Weight with Standard Stick** 20385 lb
Note (1) *Minimum Weight is based on rubber tracks, no counterweight, operator, full fuel tank, blade, and no bucket.
Note (2) **Maximum Weight is based on steel tracks with rubber pads, counterweight, operator, full fuel tank, blade, and no bucket.
Steel Tracks with Pads 752 lb
Counterweight 552 lb
Ground Pressure - Maximum Weight 5.9 psi
Maximum Traction Force - High Speed 6250 lbf
Ground Pressure - Minimum Weight 5.5 psi
Travel Speed - Low 1.9 mile/h
Travel Speed - High 3.2 mile/h
Maximum Traction Force - Low Speed 15175 lbf
Gradeability - Maximum 30 degrees
Hydraulic System 29 gal (US)
Hydraulic Tank 14 gal (US)
Engine Oil 3 gal (US)
Fuel Tank 39 gal (US)
Cooling System 2.6 gal (US)
Maximum Auxiliary Circuit - Primary - Flow at Pump 35 gal/min
Maximum Auxiliary Circuit - Primary - Pressure at Pump 4134 psi
Operating Pressure - Equipment 4134 psi
Digging Force - Stick - Standard 9509 lbf
Operating Pressure - Travel 4134 psi
Pump Flow at 2,400 rpm 44 gal/min
Digging Force - Bucket 13946 lbf
Maximum Auxiliary Circuit - Secondary - Flow at Pump 9 gal/min
Maximum Auxiliary Circuit - Secondary - Pressure at Pump 4134 psi
Operating Pressure - Swing 3626 psi
Boom Swing - Left 60 degrees
Machine Swing Speed 10.6 r/min
Boom Swing - Right 50 degrees
Height 17 in
Width - Standard 90.6 in
Width - Wide 96.5 in
Operator Sound Pressure (ISO 6396:2008) 72 dB(A)
Dig Depth 150.2 in
Maximum Blade Height 14.6 in
Boom in Reach 122.8 in
Transport Height 97.4 in
Swing Bearing Height 29.8 in
Cab Height 100 in
Maximum Blade Depth 16 in
Maximum Dig Height 205.5 in
Overall Shipping Length 253.9 in
Overall Undercarriage Length 113.4 in
Maximum Reach at Ground Level 248 in
Overall Track Width 90.6 in
Boom Swing Right 37 in
Ground Clearance 13.8 in
Maximum Reach 256.5 in
Maximum Dump Clearance 135.8 in
Stick Length 71.7 in
Boom Swing Left 24 in
Tail Swing without Counterweight 57.1 in
Track Belt/Shoe Width 17.7 in
Tail Swing with Counterweight 62.4 in
Boom Swing Left 24 in
Maximum Blade Depth 16 in
Stick Length 71.7 in
Swing Bearing Height 29.8 in
Cab Height 100 in
Maximum Dump Clearance 247.4 in
Maximum Blade Height 14.6 in
Track Belt/Shoe Width 17.7 in
Ground Clearance 13.8 in
Tail Swing with Counterweight 62.4 in
Maximum Reach at Ground Level 303.7 in
Vertical Wall 146.7 in
Overall Track Width 90.6 in
Transport Height 97.4 in
Boom in Reach 106.7 in
Maximum Dig Height 322 in
Dig Depth 136.2 in
Overall Undercarriage Length 113.4 in
Boom Swing Right 37 in
Overall Shipping Length 253.9 in
Tail Swing without Counterweight 57.1 in
Maximum Reach 310.4 in
Recyclability 96%
ENGINE
  • Cat C3.3 Diesel Engine (U.S. EPA Tier 4 Final/EU Stage V) – Electronic Engine, Turbo, Diesel Particulate Filter (DPF)
  • Automatic Engine Idle
  • Automatic Engine Shutdown
  • Automatic Swing Brake
  • Automatic Two Speed Travel
  • Fuel Water Separator with Indicator
  • Radial Seal – Double Element Air Filter
  • Extended Life Coolant, –37° C ( –35° F)
  • Ecology Drain
HYDRAULICS
  • Smart Tech Electronic Pump
  • Electronic Variable Displacement Piston Pump
  • Load Sensing/Flow Sharing Hydraulics
  • Power On Demand
  • Hydraulic Temperature Monitoring
  • Certified Accumulator
  • HYDO Advanced Hydraulic Oil
OPERATOR ENVIRONMENT
  • Top Guard ISO 10262 1998 Level I
  • ROPS ISO 12117-2:2008
  • Sealed and Pressurized Cab
  • Stick Steer Mode
  • Travel Cruise Control
  • Control Pattern Changer
  • Adjustable Wrist Rests
  • Molded Footrests
  • Removable, Washable Floor Mat
  • Travel Pedals and Hand Levers
  • Cat Key with Passcode Option
  • HVAC with Automatic Temperature Control
  • Hydraulic Lockout Controls
  • Integrated Lower Front Window
  • Assisted Front Window Overhead Storage
  • Rear Window Emergency Exit
  • Fabric, High Back, Suspension Seat
  • Retractable Seat Belt (75 mm/3 in)
  • Coat Hook
  • Cup Holder
  • LED Interior Light
  • Literature Holder
  • Mounting Bosses for Top and Front Guards
  • 12V Power Socket
  • Radio – Bluetooth, Auxiliary, Microphone, USB (charging only)
  • Skylight
  • Signaling/Warning Horn
  • Cab and (left side) Boom Work Lights
  • Utility Space for Mobile Phone
  • Next Generation Color LCD Monitor (IP66)
    – Jog Dial Interface
    – Fuel Level and Coolant Temperature Gauges
    – Maintenance and Machine Monitoring
    – Performance and Machine Adjustments
    – Numeric Security Code
    – Multiple Languages
    – Camera Ready (IP68 & IP69K)
    – Hour Meter with Wake Up Switch
UNDERCARRIAGE
  • Greased and Lubricated Track
  • Hydraulic Track Adjusters
  • Tie Down Eyes on Track Frame
  • Dozer Blade
  • Dozer Float
  • Bolt-on, Reversible Wear Edge
BOOM, STICK AND LINKAGES
  • Variable Angle Boom
  • Standard Stick (1820 mm/71.7 in)
  • Front Shovel Capable – Pin-on/Manual Coupler/Hydraulic Coupler (not available in all regions)
  • Thumb Ready (not available in all regions)
ELECTRICAL
  • 12 Volt Electrical System
  • 60 Ampere Alternator
  • Circuit Breaker
  • 900 CCA Maintenance Free Battery
  • Battery Disconnect
  • Ignition Key Stop Switch
OTHER
  • Locks on External Enclosure Doors
  • Lockable Fuel Cap
  • Beacon Socket
  • Rear Reflectors
OPERATOR ENVIRONMENT
  • Push to Start with Bluetooth® Key
  • Air Suspension Heated Seat
  • Rain Visor
  • Next Generation Advanced Monitor (below are all included with Next Generation Advanced Monitor option)
    – Touch Screen
    – Site Reference System
    – High Definition Camera Capable (IP68 & IP69K)
    – Numeric Security Code
UNDERCARRIAGE
  • Wide Dozer Blade
  • Steel Tracks (450 mm/17.7 in wide)
  • Wide Steel Tracks (600 mm/23.6 in)
  • Steel Track with Rubber Pads
  • Track Guides
BOOM, STICK AND LINKAGES
  • Attachments including Buckets, Augers and Hammers
  • 2nd Auxiliary Hydraulic Lines
  • Boom Lowering Check Valve
  • Stick Lowering Check Valve
  • Certified Lifting Eye
ELECTRICAL
  • Product Link Elite (regulations apply)
  • Travel Alarm
  • Rearview Camera
  • Rotating Beacon
GUARDING
  • Mesh Front Guard ISO 10262 1998 Level I
  • Heavy Duty Front Guard ISO 10262 1998 Level II
  • Overhead Cab Guard ISO 10262 1998 Level II
  • Polycarbonate Front Window EN356 P5A
  • Track Guards
OTHER
  • Additional Counterweight
  • Water Jacket Heater
  • Refueling Pump