Milton CAT 308D CR SB User Manual
308D CR
308D CR SB
Mini Hydraulic Excavators
®
Engine
Engine Model MMC 4M40-TL
Net Power 41.5 kW 55.6 hp
Gross Power 43 kW 57.6 hp
Weights
Operating Weight – 308D CR 7850 kg 17,305 lb
Operating Weight – 308D CR SB 8400 kg 18,519 lb
308D CR
308D CR SB
Features
Comfortable Cab
Intuitive seat-mounted controls and a
spacious cab with an air suspension seat
keep you comfortable all day.
Compact Radius Design
and Swing Boom Option
Machine fits easier and works well in tight
areas, reducing the risk of machine and
jobsite damage.
Versatility
Machine is configured to operate with a
wide selection of Cat® Work Tools increasing
jobsite versatility.
Performance
High digging forces and fast cycle times
maximize productivity without compromising
controllability.
Contents
Operator Station . . . . . . . . . . . . . . . . . . . . .3
Compact Radius . . . . . . . . . . . . . . . . . . . . .3
Performance . . . . . . . . . . . . . . . . . . . . . . . .4
Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Work Tools . . . . . . . . . . . . . . . . . . . . . . . . . .5
Undercarriage . . . . . . . . . . . . . . . . . . . . . . .6
Serviceability. . . . . . . . . . . . . . . . . . . . . . . .7
Customer Support. . . . . . . . . . . . . . . . . . . .7
Specifications . . . . . . . . . . . . . . . . . . . . . . .8
Standard and Optional Equipment. . . . .11
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The Cat 308D CR and 308D CR SB Mini Hydraulic Excavators
deliver 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 swing boom
version increases the machine and the customer's versatility by
allowing the operator to dig box sections without repositioning
the machine. The swing boom also allows you to accurately
and safely dig along obstacles like fences, walls and buildings.
The 308D CR and 308D CR SB set the standard for excavators in
the eight-ton size class.
Operator Station
Simple, easy operation allows the operator to focus on production.
A larger, spacious cab provides operator comfort and improved
visibility. Joystick controlled swing boom and auxiliary switches
clear space on the fl oor giving the operator plenty of foot and
leg room. An intuitive cab layout for ease of operation reduces
operator fatigue. Other cab features include:
• Air conditioning is standard.
• 12V power receptacle for charging cell phones.
• A reclining air suspension seat with adjustable armrests.
• Storage space for literature and cup holder.
• Low effort joystick controls designed to match the operator’s
natural wrist and arm positions. Consoles can be adjusted
independently of the seat for maximum comfort.
• Overhead skylight improves visibility and can be opened
to create air fl ow.
• Upper front windshield opens and easily stores on the roof
above the operator with an automatic latching mechanism.
• All functions are fully pilot operated lowering owning and
operating costs.
• Pattern control changer is located under the fl oor mat.
Monitor Display
Newly designed LCD monitor is located to give a clear view
of the machine’s monitoring system, ensuring fuel level, water
temperature and warning lights are easily seen.
Compact Radius
More versatile in tight areas.
• The compact radius design provides greater versatility and
capability to work within confi ned areas. The radius of the
upper body stays close to the width of the undercarriage
allowing the operator to concentrate on the work at hand,
rather than the tail swing of the machine.
• Cab door is curved and shaped to follow the line of the
cab, it slides open taking up less space than a hinged door.
When working in tight areas this allows for safer ingress
and egress. This design maintains the machine’s compact
dimensions reducing the risk of damage.
• Jobsite fl exibility with a reduced risk of damage and less
stress for the operator add up to higher rates of productivity.
3
Performance
Powerful digging with precise control.
Hydraulics
Smooth responsive hydraulics give the level of control demanded by the
customer in any application, from fi ne grading and dozing to backfi lling.
Powerful bucket and stick digging forces combined with fast cycle times result
in world class productivity and performance. Automatic two speed function
improves jobsite maneuverability with precise control by balancing travel
speed with the torque needed for turning and traveling on inclines. Dozer blade
fl oat function enables easy ground levelling for landscaping and fi nish grade
applications as well as more effi cient jobsite clean-up. Economy mode can be
selected with the in-cab LCD monitor and provides better fuel effi ciency in a
platform well suited for less experienced operators.
Controls
Joystick mounted auxiliary and boom swing control enhances machine
controllability. Intuitive controls give fi ne modulation. The levers and dozer
function ensure “as new” levels of controllability are maintained throughout
the machine life.
Lift Capacity
The new Caterpillar D-Series has industry leading lift capacity matched with
outstanding stability in a compact radius package. This provides the on-site
versatility required to match the diverse and continually changing needs
of the customer.
Stick and Boom
A choice of standard or long, thumb ready sticks enable the customer to match
the machine’s digging envelope to their requirements. The boom options feature
a fi xed boom to maximize stability and lifting and a swing boom design that
maximizes reach. The swing boom also allows the operator to trench parallel
to tracks, dig close to structures and dig a box-section without repositioning
the undercarriage.
Engine
Clean, quiet and effi cient.
• Interim Tier 4 turbocharged engine
gives higher power and maintains strong
performance at high altitude.
• High digging forces give power through
even the most compacted ground with
smooth control and responsive hydraulics
that deliver productivity that our customers
demand.
• Load sensing hydraulics optimize the fl ow
of oil for smooth powerful performance
and increased fuel economy.
• Automatic engine idle lowers engine
revolutions when not in use to conserve fuel
and lower environmental noise/emissions.
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