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308.5

Mini Excavators

The Cat® 308.5 Mini Excavator delivers maximum power and performance in a mini size to help you work in a wide range of applications.

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Engine Model Cat C3.3B
Net Power 51.8 kW
Operating Weight 8668 kg
Height 431 mm
Availability Please Call Admin
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308.5
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OVERVIEW

Mini Excavators Inspired by Our Customers

FEATURES & BENEFITS

ALL DAY COMFORT

A sealed and pressurized cab is equipped with an improved air conditioning system, adjustable wrist rests and a suspension seat to help keep you working comfortably all d... Read more

EASY TO OPERATE

Controls are easy to use and the intuitive Next Generation Monitor provides customizable machine operator preferences and easy to read machine information. Read more

STICK STEER TRAVEL MODE

Moving around the job site is even easier with the Cat Stick Steer option. Easily switch from traditional travel controls with levers and pedals to joystick controls with... Read more

BIG PERFORMANCE IN A MINI DESIGN

Increased lifting, swinging, travel and multi-functioning performance helps you get the job done more efficiently, and dig-to-blade allows for easy clean up. Read more

SAFETY ON THE JOB SITE

Your safety is our top priority. The Cat Mini Excavator is designed to help keep you safe on the job. Courtesy work lights and a fluorescent retractable seat belt are jus... Read more

SIMPLE SERVICE FOR LESS DOWNTIME

Maintenance is quick and easy on the Cat Mini Excavator. Routine check points are easy to access at ground level with grouped service points and robust service panels. Read more

LOWER OPERATING COSTS

Equipped with features such as auto idle, auto engine shutdown, and efficient hydraulics with a variable displacement pump, the Cat Mini Excavator was designed with reduc... Read more

SPECIFICATIONS FOR 308.5

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Engine
Engine Model Cat C3.3B
Net Power 51.8 kW
Displacement 3.33 l
Stroke 120 mm
Net Power - 2,200 rpm - ISO 9249/EEC 80/1269 51.8 kW
Gross Power - ISO 14396 55.4 kW
Rated Net Power - 2,200 rpm - U.S. EPA Tier 4 Final - ISO 9249/EEC 80/1269 52.4 kW
Rated Net Power - 2,200 rpm - EU Stage V - ISO 9249/EEC 80/1269 53.3 kW
Bore 94 mm
Weights
Operating Weight 8668 kg
Minimum Operating Weight with Cab* 8334 kg
Note (1) *Minimum Weight is based on steel tracks, counterweight, operator, full fuel tank, standard stick and bucket.
Maximum Operating Weight with Cab** 8668 kg
Note (2) **Maximum Weight is based on steel tracks, counterweight, operator, full fuel tank, standard stick, blade and bucket.
Blade
Height 431 mm
Width - Standard 2300 mm
Width - Wide 2450 mm
Dimensions - Standard Stick
Cab Height 2574 mm
O/A Shipping Length 6190 mm
O/A Track Width 2300 mm
Ground Clearance 403 mm
Track Belt/Shoe Width 450 mm
Tail Swing without Counterweight 1800 mm
Maximum Dump Clearance 5339 mm
Maximum Blade Height 363 mm
Maximum Blade Depth 414 mm
Dig Depth 4202 mm
Maximum Reach - Ground Level 6214 mm
Stick Length 1820 mm
Transport Height 2682 mm
O/A Undercarriage Length 2880 mm
Boom Swing - Right 963 mm
Maximum Dig Height 7374 mm
Tail Swing with Counterweight 1995 mm
Swing Bearing - Height 789 mm
Maximum Reach 6370 mm
Boom Swing - Left 503 mm
Vertical Wall 3375 mm
Boom In Reach 1812 mm
Dimensions - Long Stick
Track Belt/Shoe Width 450 mm
Maximum Dig Height 7038 mm
Swing Bearing - Height 735 mm
O/A Track Width 2300 mm
Maximum Blade Depth 408 mm
Ground Clearance 349 mm
Boom Swing - Left 503 mm
Boom In Reach 3215 mm
Maximum Dump Clearance 5071 mm
O/A Undercarriage Length 2892 mm
Maximum Blade Height 369 mm
O/A Shipping Length 6656 mm
Tail Swing without Counterweight 1450 mm
Maximum Reach - Ground Level 7461 mm
Tail Swing with Counterweight 1645 mm
Transport Height 2522 mm
Cab Height 2520 mm
Stick Length 2358 mm
Maximum Reach 7637 mm
Boom Swing - Right 963 mm
Dig Depth 4644 mm
Vertical Wall 3405 mm
Travel System
Ground Pressure - Maximum Weight 37.6 kPa
Maximum Traction Force - High Speed 29.3 kN
Ground Pressure - Minimum Weight 36.2 kPa
Travel Speed - Low 2.7 km/h
Travel Speed - High 4.4 km/h
Maximum Traction Force - Low Speed 71 kN
Gradeability - Maximum 30 degrees
Service Refill Capacities
Hydraulic System 104 l
Hydraulic Tank 53 l
Fuel Tank 145 l
Engine Oil 11.2 l
Cooling System 10 l
Weight Increase from Minimum Configuration
Long Stick 66 kg
Counterweight 250 kg
Steel Tracks with Pads 645 kg
Hydraulic System
Digging Force - Stick - Long 35.7 kN
Auxiliary Circuit - Secondary - Flow 33 l/min
Digging Force - Bucket 61.5 kN
Operating Pressure - Swing 250 bar
Type Load Sensing Hydraulics with Variable Displacement Piston Pump
Auxiliary Circuit - Secondary - Pressure 285 bar
Auxiliary Circuit - Primary - Pressure 285 bar
Operating Pressure - Equipment 285 bar
Operating Pressure - Travel 285 bar
Digging Force - Stick - Standard 41.7 kN
Pump Flow at 2,400 rpm 167 l/min
Auxiliary Circuit - Primary - Flow 131 l/min
Sound
Operator Sound Pressure (ISO 6396:2008) 72 dB(A)
Average Exterior Sound Pressure (ISO 6395:2008) 99 dB(A)
Note European Union Directive “2000/14/EC”
Certification - Cab
Roll Over Protective Structure (ROPS) ISO 12117-2:2008
Top Guard ISO 10262:1998 (Level II)
Tip Over Protective Structure (TOPS) ISO 12117:1997
Air Conditioning System
Air Conditioning The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1.0 kg of refrigerant which has a CO2 equivalent of 1.430 metric tonnes.
Swing System
Machine Swing Speed 10.6 r/min

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Engine Model Mitsubishi S3Q2-T
Net Power 29 kW
Gross Power 30.2 kW
Operating Weight 3855 kg
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305 SR

Net Power 51.8 kW
Net Power - 2,200 rpm - ISO 9249:2007, 80/1269/EEC 51.8 kW
Bore 94 mm
Gross Power - SAE J1995 55.4 kW
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305.5

Engine Model Cat C2.2
Net Power 32.6 kW
Net Power - 2,400 rpm - ISO 9249/SAE J1349 32.6 kW
Bore 84 mm
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305E2 CR (Tier 4 Interim)

Engine Model Cat® C2.4
Net Power 30 kW
Net Power - ISO 9249 30 kW
Operating Weight 5185 kg
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040E SR

Rated Power 18.9 kW
Machine Weight 3600 kg
Engine Model D1703-K3A
Standard Bucket Capacity 0.11 m³
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307D

Engine Model Mitsubishi 4M40 TL
Net Power 41.5 kW
Gross Power 43 kW
Operating Weight 7075 kg
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308D CR Swing Boom

Engine Model 4M40-TL
Net Power 41.5 kW
Gross Power 43 kW
Operating Weight 8440 kg
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309 CR VAB (Long Undercarriage)

Note The 309 CR VAB specifications are based on a machine configured with a Long (L) Undercarriage. For specifications representing a 309 CR VAB with a Standard Undercarriage, please refer to the 308 CR information.
Net Power 51.8 kW
Displacement 3.33 l
Stroke 120 mm
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