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308D CR

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Overview

The Cat 308D CR Mini Hydraulic Excavator delivers superior performance and comfort while reducing your operating costs. The large spacious cab provides a comfortable work area. Intuitive seat-mounted controls are easy to use for greater job accuracy and efficiency. The compact radius design allows jobsite work where other machines cannot operate--significantly impacting your bottom line. The 308D CR sets the standard for excavators in the eight-ton size class.

Engine

Units:
Engine Model Mitsubishi 4M40 TL Mitsubishi 4M40 TL Less
Net Power 55.6 hp 41.5 kW Less
Gross Power 57.6 hp 43.0 kW Less

Weights

Operating weight 17306.0 lb 7850.0 kg Less
Operating Weight with Cab 17306.0 lb 7850.0 kg Less
Operating weight with cab (308D CR SB) 18519.0 lb 8400.0 kg Less

Dimensions

Max digging depth - standard stick 13.4 ft 4090.0 mm Less
Max reach ground level - standard stick 20.3 ft 6190.0 mm Less
Length to Center of Rollers 20.1 ft 6340.0 mm Less
Max dump height - long stick 18.8 ft 5730.0 mm Less
Max dump height - standard stick 17.4 ft 5310.0 mm Less
Max vertical dig depth - standard stick 12.0 ft 3650.0 mm Less
Shipping Height 8.5 ft 2590.0 mm Less
Shipping length 19.1 ft 5810.0 mm Less
Swing radius - rear 4.2 ft 1290.0 mm Less

Engine Dimensions

Bore 3.7 in 95.0 mm Less
Stroke 3.9 in 100.0 mm Less
Displacement 173.0 in3 2.83 L Less

Travel System

Gradeability (max) - high 35.0 Degrees 35.0 Degrees Less
Max traction force 14523.0 lb 64.6 kN Less
Travel speed - high 3.1 mph 5.0 km/h Less
Travel speed - low 1.9 mph 3.1 km/h Less

Hydraulic System

Operating Pressure - Equipment 4061.0 psi 280.0 bar Less
Digging forces - stick (standard) 8768.0 lb 39.0 kN Less
Digging force - stick (long) 7868.0 lb 35.0 kN Less
Digging force - bucket 13489.0 lb 60.0 kN Less
Operating Pressure - Travel 4641.0 psi 320.0 bar Less
Operating Pressure - Swing 3481.0 psi 240.0 bar Less
Auxiliary circuit - primary 33.8 gal/min 128.0 L/min Less
Auxiliary circuit - secondary 16.9 gal/min 64.0 L/min Less

Swing System

Machine swing speed 10.0 RPM 10.0 RPM Less

Sound Levels

Exterior Cab 98.0 dB(A) 98.0 dB(A) Less
Interior Cab 79.0 dB(A) 79.0 dB(A) Less

Service Refill Capacities

Cooling system 4.1 gal 15.7 L Less
Engine oil 3.3 gal 12.5 L Less
Hydraulic tank 21.9 gal 83.0 L Less
Fuel tank 33.0 gal 125.0 L Less
Hydraulic system 24.8 gal 94.0 L Less

MSC Comments

MSC Spec Date 1/06 1/06 Less

Operator Station

Simple, easy operation allows the operator to focus on production.


Compact Radius

More versatile in tight areas.


Performance

Powerful digging with precise control.


Engine

Clean, quiet and efficient.


Work Tools

Cat work tools are matched to meet your application needs.


Undercarriage

Excellent stability.


Serviceability

Easy access and minimal maintenance requirements keep your machine on the job.


Customer Support

Unmatched support makes the difference.


308D CR Standard Equipment

OPERATOR STATION
  • Cab fully glazed
  • Interior light
  • Pillar mounted windshield wiper and washer
  • Air conditioning, heater and defroster
  • Bolt-on FOGS capability
  • Openable uppper front windshield
  • Removable lower front windshield
  • Openable skylight
  • Right and rear windows, polycarbonate
  • Sliding door window, tempered glass
  • Rear window, emergency exit
  • Seat, high back suspension, fabric covered, 4 way adjustment
  • Armrest, adjustable
  • Seatbelt 75 mm (3 in)
  • Coat hook
  • Cup holder
  • Literature compartment
  • Floor mat
  • Mirrors
  • AM/FM radio
  • Monitoring system, guages and indicators
  • Neutral lever hydraulic lockout
  • Joystick pilot operated controls
  • Auxiliary control, joystick (proportional control)
  • Travel control pedals with hand levers
  • Power supply, 12V
  • Dial type accelerator
  • Work light, cab-mounted
  • CAT HD batteries, (cold weather start)
  • Altenator 35 amp
  • Warning horn
  • 24-volt electric starting

HYDRAULICS and POWERTRAIN
  • MMC 4M40-TL Diesel Engine
  • Certified to meet U.S. EPA Interim Tier 4
  • Extended life coolant -37°C (-34°F)
  • Variable displacement load sense hydraulics
  • Combined function auxiliary hydraulic circuit
  • Quick disconnect fittings
  • Automatic swing parking brake
  • Control pattern changer
  • Travel alarm
  • Straight line travel
  • Boom check valve
  • Two speed auto-shift travel
  • Automatic engine idle
  • Boom lowering device (accumulator)
  • Reverse swing damping valve
  • 2500 m (8,200 ft) altitude capability

UNDERCARRIAGE, BLADE and TRACK
  • Steel tracks, 450 mm (18 in)
  • Dozer blade with float function
  • Blade, weld on cutting edge
  • Grease lubricated track seals
  • Idler end track guiding guards
  • Hydraulic track adjusters

OTHER
  • Caterpillar Corporate "One Key" System
  • Fuel cap, lockable
  • Doors, lockable
  • Stick, standard, thumb ready
  • Bucket linkage with lifting eye
  • Additional counterweight
  • Toolbox
  • Antenna
  • Pictograph films

308D CR Optional Equipment

OPERATOR STATION
  • Headrest for KAB 528P/C, T8P/C
  • Cab fan
  • Sun visor
  • Light, boom-mounted

HYDRAULICS and POWER TRAIN
  • Cooling package, high ambient
  • Starting kit, cold weather
  • Coolant, extended life -50°C (-58°F)
  • Medium pressure auxiliary lines
  • Hydraulic quick coupler lines

UNDERCARRIAGE, BLADE and TRACK
  • Rubber tracks, 450 mm (18 in)
  • Segmented rubber track, 450 mm (18 in)
  • Bolt on rubber pads
  • Steel tracks, 600 mm (24 in)
  • Blade, bolt on cutting edge

WORK TOOLS
  • Quick Couplers: Mechanical, Hydraulic, Pin Lock and Wedge Style
  • Buckets: Heavy Duty, Heavy Duty Rock, Ditch Cleaning and Pin Lock
  • Thumbs: Hydraulic, Full Rotation and Stiff Link
  • Auger
  • Hammer
  • Shear
  • Compactor

OTHER
  • Stick, long
  • Guard - Front screen cab and canopy
  • Guard - Vandalism
  • Guard - Falling objects
  • Guard - Swivel
  • Rain protector, cab front

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