The Caterpillar power train gets the job done smoothly and quickly.
Torque ConverterThe lock-up torque converter combines the maximum rimpull and cushioned shifting of torque converter drive with the efficiency and performance of direct drive.
Power Shift TransmissionThe six-speed, planetary power shift transmission utilizes pressure valve to regulate clutch pressure rise and fall to ease clutch engagement. This reduces shock loads on power train components.
Final DrivesFinal drives and differential torque multiplication of 13.15:1 further reduces stress on the drive train.
Transmission and Torque Converter SumpTransmission and torque converter share a common sump. The combined sump offers an easily accessible fill tube and site gauges.
AxlesFull floating axles are shot peened to relieve internal stresses and increase durability. Rolled splines also provide increased service life.
Rear Wheels and RimsCat rear wheels and Cat center-mount rims are mounted using studs and nuts to minimize maintenance and maximize durability.
Transmission Chassis Controller (TCC)Transmission chassis Controller (TCC) uses electronically transferred engine rpm data to execute shifts at preset points for optimum performance and efficiency.
Power Train IntegrationCaterpillar's power train integration provides increased component life and operator comfort.
The eight-cylinder, turbocharged and aftercooled HEUI engine is built for power, reliability and economy with reduced sound levels and low emission.
Diesel EngineThe Cat 3408E Diesel Engine is a four-stroke design that uses long power strokes for more complete fuel combustion and optimum efficiency.
Torque RiseThe torque rise provides high lugging force during acceleration on grade or in high rimpull conditions.
Hydraulic Electronic Unit Injector (HEUI)The Hydraulic Electric Unit Injector (HEUI) is a proven high-pressure, direct injection fuel system. This system electronically monitors operator and machine inputs to optimize engine performance.
Electronic Control Module (ECM)The Electronic Control Module monitors key functions and logs critical indicators.
Engine/Power Train Integration
Combining the electronic Engine Control Module (ECM) with the Caterpillar Transmission Chassis Controller (TCC) allows critical power train components to work more intelligently.
Cat Data LinkThe CAT Data Link electronically integrates the machine's computer systems, which allows communications.
Electronic Technician (ET)Electronic Technician (ET) enhances diagnostics/serviceability. The electronic engine and transmission controls provide exhaustive diagnostic capability for service technicians.
Caterpillar Electronic Monitoring System (CEMS)Caterpillar Electronic Monitoring System (CEMS) allows the operator to view requested information and utilizes a three-category warning system to alert operator to abnormal machine conditions.
Optional AttachmentsCaterpillar offers optional attachments that integrate with the CAT Data Link System.
Oil-cooled Rear Brakes
Reliable braking lets the operator concentrate on the haul road.
Disc BrakesCaterpillar forced oil-cooled, multiple disc brakes are continuously cooled for exceptional, fade-resistant braking and retarding.
Oil-cooled Disc BrakesOil-cooled disc brakes are designed and built for reliable, adjustment-free operation providing superior performance and service life in comparison to shoe-type and dry-disc system.
Oil FilmAn oil film prevents direct contact between the discs. Absorbing the braking forces by shearing oil and carrying heat away, this design brake life.
PistonsA Caterpillar patented, two-piston design combines the service, secondary, parking brake, and retarding functions.
Cat Retarding SystemWhen retarding, the engine runs against compression on downhill hauls, resulting in minimal fuel burn.
The backbone of the Cat truck.
Box-Section DesignThe 771D frame uses a box-section design, incorporating 17 castings in high-stress areas, with deep-penetrating and continuous wrap-around welding.
CastingsCastings have large radii with internal reinforcing ribs to dissipate stress. Castings move welds to lower stress areas and provide two to three times the strength of equivalent-sized fabricated structures.
FrameThe 771D frame provides for ease of serviceability.
Rollover Protection Structure (ROPS)The Rollover Protection Structure (ROPS) attaches securely to four castings welded into the frame.
Suspension SystemThe suspension system is designed to dissipate haul road and loading impacts for extended frame life.
Flat Floor Body
Caterpillar offers excellent wear characteristics in a flat floor design.
Quarry BodyThe flat floor quarry body offers excellent load retention on grades up to 12 percent and on smoother haul road conditions.
771D Bodies771D Bodies are designed to handle a variety of material densities. Maximum payload is reached in three to five passes from a matched Cat loader.
ConstructionBody floor construction uses a 12 degree single slope, offering excellent wear characteristics and uniform dumping into hoppers, crushers, and feeders.
Sidewall and Floor JunctionsSidewall and floor junctions are joined by five-sided beams to resist impact loading and sustained hauling stresses.
Box-section BeamsBox-section beams offer increased durability in the floor, sidewalls, top rail, corner and cab canopy areas.
HARDOX 400 SteelHARDOX 400 steel wear surfaces provide excellent wear resistance and are easily welded without preheating procedures.
CylindersTwo-stage hoist cylinders provide fast dump cycle times.
Standard BodyStandard body comes exhaust heated with options including a full-time muffler or exhaust diverter.
Control ease and comfort maximizes productivity.
Dash PanelThe wraparound dash panel is provided in an easy line-of-sight arrangement, using LED backlit rocker switches.
SeatThe Caterpillar Contour Series Air Suspension seat is standard. The seat is fully adjustable and includes an adjustable right-hand armrest.
Steering WheelTilt/telescoping steering wheel with ergonomic grip improves comfort and control.
Transmission ConsoleTransmission console has LED backlit gear numbers and ergonomic shift knob.
VisibilityExceptional all-around visibility reduces fatigue and improves productivity.
CabIntegral, sound-suppressed ROPS/FOPS Cab is resiliently mounted providing a quiet, protected work environment.
Front Brake Cut-out SwitchFront brake cut-out switch increases front brake component life.
Storage CompartmentLarge storage compartment is located under the trainer's seat.
Trainer's SeatTrainer's seat with increased hip/shoulder room, backrest, and retractable seat belt.
Caterpillar Electronic Monitoring System (CEMS)Caterpillar Electronic Monitoring System (CEMS) provides critical data. The system features three separate displays.
Heater/Air ConditionerA standard heater and optional air conditioner with four-speed fan and nine vents.
Foot PedalsErgonomically designed foot pedals for increased operator comfort. Secondary brake moved to floor.
WindowElectric power window for simplified operation.
Hoist LeverElectrohydraulic hoist lever is finger tip actuated and provides low-impact body-down snubbing.
Truck Production Management System (TPMS)Truck Production Management System (TPMS) - optional - provides payload and cycle time data.
Automatic Retarder Control (Optional)
Electronically controls braking on grades for improved engine and brake component life.
Engine Overspeed ProtectionWith the accelerator depressed and/or ARC turned off, ARC will automatically activate at 2,475 rpm to help avoid potentially destructive and often costly engine overspeeds.
Operating EfficiencyARC results in increased operating efficiency with faster downhill speeds. By maintaining consistently higher engine speeds, average truck speed will be higher than a manually controlled truck.
ControllabilityARC results in excellent controllability and reduced operator effort. Automatic brake modulation provides a smoother ride over manual modulation, allowing the operator to focus more on truck operation down the haul road.
Component LifeARC results in improved component life, optimized system cooling capability, and reduced torque fluctuations result from the precision of ARC.
Self Diagnostic CapabilityARC results in faster troubleshooting and diagnosis with self-diagnostic capability and the ability to communicate with ET through the CAT Data Link System.
Operator AwarenessOperator awareness through electronic integration and the CEMS, alerting the operator to overspeed conditions and critical machine functions.
Traction Control System (Optional)
Electronically controls wheel slippage for improved performance.
Operator AwarenessTCS provides operator awareness through an on-dash indicator, signifying TCS is engaged.
Differential ActionTCS utilizes normal differential action to provide superior maneuvering in poor underfoot conditions.
TorqueTCS divides torque equally to reduce stress created on final drives and axles when torque is transferred to one side.
Back-up DesignTCS maintains the back-up design. Should the sensors fail, normal differential action is still available to maintain control and steering.
The 771D is designed for versatility.
Body OptionsBody options include a full line of standard and custom designs based on specific customer preference, material density, loading tools and site conditions.
Tire OptionsA full line of tire options, representing various manufacturers, is offered by Caterpillar to maximize performance and life for specific applications.
AttachmentsAttachments give the customer options to tailor trucks for specific application requirements, including Truck Production Management System, Automatic Retarder Control, Traction Control System, Custom product offerings, and Muffler/exhaust diverter.
Caterpillar System ApproachThe Caterpillar system approach means increased efficiencies through "common design".
Caterpillar Production Analysis Team (PAT)The Caterpillar Production Analysis Team (PAT) and Caterpillar software programs can assist customers with detailed, application evaluation.
Serviceability/Total Customer Support
Purchase of a Caterpillar machine includes a total commitment to customer support.
Maintenance PlatformThe maintenance platform provides access to air tank, brake master cylinder, and make-up tank, engine oil level, air filters, steering hydraulic tank, and battery compartment.
Battery Disconnect SwitchA ground-level battery disconnect switch facilitates safe, convenient servicing and maintenance.
Diagnostics with CEMSOn-board diagnostics with CEMS provides the machine operator with a three-category warning system and quick access to stored diagnostic data.
Diagnostics with ETOff-board diagnostics with ET allows service technicians access to stored diagnostics data reducing down time and lowering operating costs.
Air FiltersRadial seal air filters are easy to change, reducing air filter maintenance times.
Oil FiltersVertical, spin-on oil filters provide for simplified servicing.
Quick CouplerQuick coupler pressure taps, located in all hydraulic systems, provide clear, quick pressure checks. SOS oil analysis points make oil sampling quick, clean, and easy.
Electrical ConnectorsSealed electrical connectors lockout dust and moisture. The color-coding for wires is standard for the entire Cat product line.
Machine Management ServiceCat Dealers help manage equipment investments.
Part AvailabilityThe Caterpillar worldwide computer network locates parts instantly to minimize machine downtime.
Literature SupportCaterpillar manuals are easy to use and help provide the full value of an equipment investment.