The D8R's elevated sprocket increases productivity, simplifies maintenance, reduces downtime with modular components, and raises final drives and associated power train components out of the work environment.
The 3406C engine, torque divider and field proven, power shift transmission provide an excellent balance between efficiency and power.
Caterpillar 3406C engine performs at full-rated net power with a torque rise of 55%.
The 3406C engine meets worldwide emissions regulations for the Environmental Protection Agency, the European Union and the California Air Resources Board.
Turbocharging and Aftercooling
Turbocharging and aftercooling provide high horsepower while keeping RPM and exhaust temperatures low.
A steel spacer between the block and head eliminates the need for block counterbores, extending block life.
Longer Component Life
Components live longer because oil-cooled pistons and full-length water-cooled cylinder liners provide maximum heat transfer for longer component life.
Stellite-faced valves, through-hardened crankshaft journals and steel-backed, copper-bonded aluminum bearings help assure reliable performance in the toughest duty.
Dealer's Exchange Program
Cat dealer's exchange program for major engine components can cut repair time and costs.
A single-stage torque converter with output torque divider send 70% of engine torque through the converter, 30% through a direct drive shaft for greater driveline efficiency and higher torque multiplication.
The torque converter shields the driveline from sudden torque shocks and vibration.
Elevated final drives are isolated from ground and implement induced impact loads for extended power train life.
Planetary power shift transmission has 3-speeds forward and 3-speeds reverse and utilizes large diameter, high-capacity, oil-cooled clutches.
Superior cooling and ease of service keep the D8R on the job and producing day after day.
Advanced Modular Cooling System (AMOCS) utilizes an exclusive two pass cooling system and increased cooling surface area to provide significantly more cooling capacity than conventional systems.
Extended Life Coolant
Caterpillar Extended Life Coolant (ELC) is now standard in all D8R tractors.
Two Pass Cooling System
Two pass cooling system circulates coolant from the sectioned bottom tank up through one side of the cooling element and down through the other side returning it to the bottom tank.
The cooling elements are individual core modules that are connected to a sectioned bottom tank.
The servicing of the AMOCS can be performed without tilting the radiator guard.
Uses hydraulics instead of friction to steer.
Differential steering delivers uninterrupted power to both tracks to help maintain blade loads, reduce cycle times and provide enhanced side slope capability.
The operator can steer and change directions easily with one hand.
A planetary differential turns the machine by speeding up one track and slowing the other while maintaining full power to both.
Tiller control allows the operator to work more precisely in close areas, around structures, obstacles, grade stakes, other machines or on fine grades.
Efficient in Soft Underfooting
Especially efficient in soft underfooting, where both tracks can power through turns to keep loads moving and maintain traction.
An efficient hydraulic system devotes one pump solely to steering with a separate pump to power implements.
Durable design and construction stand up to the most demanding applications.
Mainframe strength. The D8R mainframe is built to absorb high impact shock loads and twisting forces.
Frame rails are full box section, designed to keep components rigidly aligned.
Heavy steel castings give added strength to the main case, equalizer bar saddle, front cross member and tag-link trunnion.
The top and bottom rails are continuous rolled sections, with no machining or welding to provide superior mainframe durability.
The main case elevates the final drives well above the ground level work area to protect them from impact loads, abrasion and contaminants.
Track Roller Frame Alignment
A pivot shaft and pinned equalizer bar maintain track roller frame alignment.
Tag-link construction brings the blade closer to the machine for more precise dozing and load control.
Tag-link design provides solid lateral stability and better cylinder positions for constant pryout independent of blade height.
Caterpillar elevated sprocket tractors provide excellent traction, durability and ride with outstanding component life.
Suspended undercarriage design absorbs impact loads to reduce the shock loads transferred to the undercarriage.
Bogie suspension conforms more closely to the ground to provide more ground contact, especially in hard, uneven terrain.
Roller frames are tubular, to resist bending and twisting, with added reinforcement where operating loads are the highest.
Non-suspended undercarriage, without bogies, is available for applications involving moderate-impact, or highly abrasive materials.
Sealed and lubricated track. Permanently coats the track pin with a sealed-in lubricant, minimizing metal-to-metal contact.
Designed for comfort and ease of operation.
Clear full-circle view.
Comfortable, non-tiring operation.
Low effort controls are easily accessible and provide sure, precise maneuvering with less operator fatigue.
The Caterpillar Contour Series Seat is fully adjustable and designed for comfort and support.
Control Lever Restraints
Implement control lever restraints, when engages, prevent inadvertent movement of control lever.
Dual twist tiller controls the direction and degree of turns, forward-reverse shifting and gear selection with one control.
Electronic Monitoring System (EMS) and Gauge Group
The Gauge Group includes engine coolant temperature, power train oil temperature, hydraulic oil temperature and fuel level.
The D8R can be tailored to fit a variety of applications with many attachment options.
The 8SU blade and the 8U blade make full use of the D8R's power.
Single and multi-shank rippers are made to penetrate tough material fast and rip thoroughly.
In addition to the standard range of optional equipment, there are special attachments and machine configurations to suite particular customer needs.
Load Sensing Hydraulics
Adjusts implement and hydraulic power to increase both operator and machine efficiency.
Monitor Hydraulic Power
Load-sensing hydraulics utilize a feedback loop from the implement valve to the implement pump to continually monitor the hydraulic power requirements of the implement.
During normal blade or ripper corrections, pump output increases and decreases to provide precise power for dozing or ripping.
Increased Machine Production
Lower pump requirements reduce engine power requirements for the hydraulics, making more drawbar power available for increased machine production.
Ease of service and maintenance gives you more time on the job.
Built-in servicing ease. Less service time means more working time.
Ecology drains provide an environmentally safer method to drain fluids.
Spin-on fuel and engine oil filters save changing time.
AMOCS individual cooling elements allow radiator servicing without major component removal, saving considerable time and cost.
A diagnostic connector allows the Cat Dealer's electronic test instrument to quickly troubleshoot the electrical system.
Quick disconnect fittings allow for fast diagnosis of the power train and implement oil systems.
Caterpillar's dealer commitment is unrivaled in the industry.
Dealers committed to fast, quality customer support.
Dealer service response extends to programs such as Custom Track Service (CTS), Scheduled Oil Sampling (SOS), and guaranteed maintenance contracts that get peak life and performance from your machine.
Your dealer is also expert at arranging affordable lease, rental or purchase financing for all Caterpillar products.