307D
Mini Hydraulic Excavator
Engine
Engine Model MMC 4M40-TL
Net Power41.5 kW55.6 hp
Gross Power43 kW57.6 hp
Weights
Operating Weight 7075 kg15,598 lb
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Contents
Operator Station  . . . . . . . . . . . . . . . . . . . . .3Performance  . . . . . . . . . . . . . . . . . . . . . . . .4Engine. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4Work Tools. . . . . . . . . . . . . . . . . . . . . . . . . .5Undercarriage. . . . . . . . . . . . . . . . . . . . . . .6Serviceability. . . . . . . . . . . . . . . . . . . . . . . .7Customer Support. . . . . . . . . . . . . . . . . . . .7307D Specifications  . . . . . . . . . . . . . . . . . .8307D Standard and
Optional Equipment  . . . . . . . . . . . . . . . . .11
307D Features
Comfortable Cab
Intuitive seat-mounted controls and a spacious cab with an air suspension seat keep you comfortable all day.
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.
Stability
Conventional tail swing design with extended counterweight provides excellent stability while maximizing lifting.
The Cat 307D 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 standard tail swing design incorporates a counterweight that extends further back on the machine. This provides leverage to create a stable work platform during lifting and digging. The 307D sets the standard for conventional tail swing excavators in the eight-ton size class.
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A larger, spacious cab provides operator comfort and improved visibility. Joystick controlled auxiliary switch clears 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:•  A ir conditioning is standard.
•  12V power receptacle for charging cell phones.•  A  reclining air suspension seat with adjustable armrests.•  S torage space for literature and cup holder.
•  L ow effort joystick controls designed to match the operator’s natural wrist and arm positions.
•  C onsoles can be adjusted independently of the seat for maximum comfort.
•  O verhead skylight improves visibility and can be opened to create air fl ow.•  U pper front windshield opens and easily stores on the roof above the operator with an automatic latching mechanism.•  A ll functions are fully pilot operated lowering owning and operating costs.
•  P attern control changer is located under the fl oor mat.
Monitor Display
Newly designed 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.
Operator Station
Simple, easy operation allows the operator to focus on production.
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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 travelling 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.
Controls
Joystick mounted auxiliary control enhances machine controllability. Intuitive controls give fi ne modul
ation. 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. This provides the control required to meet 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. A fi xed boom is featured to maximize stability and lifting.
Engine
Clean, quiet and effi cient.
•  I nterim Tier 4 turbocharged engine
gives higher power and maintains strong performance at high altitude.
•  H igh digging forces give power through even the most compacted ground with smooth control and responsive hydraulics that deliver productivity that our customers demand.
•  L oad sensing hydraulics optimize the fl ow of oil for smooth powerful performance and increased fuel economy.
•  A utomatic engine idle lowers engine
revolutions when not in use to conserve fuel and lower environmental noise/emissions.
Work Tools
Cat work tools are matched to meet your application needs.
A wide range of work tools have been developed and integrated
into the machine design to maximize machine performance and
deliver excellent value through high productivity and long life.
Cat Work Tools include:
• Heavy Duty Buckets • Shear
• Heavy Duty Rock Buckets • Compactor
• Ditch Cleaning Buckets • Thumbs
• Hydraulic Hammers • Quick Couplers
• Auger
Couplers
To maximize performance, Caterpillar Pin-Grabber Quick
Couplers are compatible with all standard work tools, enabling
the operator to simply release one work tool and pick up another,
replaceablemaximizing productivity. The couplers are available in hydraulic
and manual versions.
Auxiliary Hydraulics
The combined function high-pressure auxiliary lines and quick
connectors are fi tted as standard. This auxiliary system includes a
diverter valve which provides optimum performance when using
a one-way fl ow (hammer) or two-way fl ow (auger and thumb)
work tool. This feature allows the machine to adapt to a wide
variety of applications without re-confi guring the auxiliary lines.
V ersatility is further enhanced with optional hydraulic lines enabling
the use of a hydraulic quick coupler. A secondary auxiliary supply
circuit for work tools utilizing a rotating or other medium-pressure
circuit is also available as an optional attachment.
Thumbs
Caterpillar offers three varieties of thumbs: Stiff Link, Hydraulic and Progressive Link. The stiff link thumb incorporates the use of a fi xed link between the thumb and the stick, requiring bucket curl to secure the load. The hydraulic thumb replaces the stiff link with a cylinder that enables movement by both the thumb link and the bucket to grab an object. A progressive link thumb works much like a hydraulic thumb with more thumb rotation by incorporating an additional link. This additional rotation provides a better working range when securing material. The three varieties come with two lengths, one compatible with a pin-on bucket and one compatible
with a pin-grabber coupler.
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