The 773D Off-highway Truck is engineered for performance, designed for comfort and built to last. Time proven iron and modern technology combine to provide a highly productive, durable, reliable off-highway truck focused on our customer's greatest need...lowest cost-per-ton.
The Caterpillar power train gets the job done smoothly and quickly.
The 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 Transmission
The seven-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 drives and differential torque multiplication of 17.48:1 further reduces stress on the drive train.
Transmission and Torque Converter Sump
Transmission and torque converter share a common sump. The combined sump offers an easily accessible fill tube and sight gauges.
Full floating axles are shot peened to relieve internal stresses and increase durability. Rolled splines also provide increased service life.
Rear Wheels and Rims
Cat 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 Integration
Caterpillar's power train integration provides increased component life and operator comfort.
The twelve-cylinder, turbocharged and aftercooled engine is built for power, reliability, economy and with the HEUI fuel system, meets all worldwide emission standards.
The Cat 3412E Diesel Engine is a four-stroke design that uses long, effective power strokes for more complete fuel combustion and optimum efficiency.
The 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 Link
The 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.
Caterpillar 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.
Caterpillar forced oil-cooled, multiple disc brakes are continuously cooled for exceptional, fade-resistant braking and retarding.
Oil-cooled Disc Brakes
Oil-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.
An oil film prevents direct contact between the discs. Absorbing the braking forces by shearing oil and carrying heat away, this design extends brake life.
A Caterpillar patented, two-piston design combines the service, secondary, parking brake and retarding functions.
Cat Retarding System
When retarding, the engine runs against compression on downhill hauls, resulting in minimal fuel burn.
The backbone of the Cat truck.
The 773D frame uses a box-section design, incorporating 17 castings in high-stress areas, with deep-penetrating and continuous wrap-around welding.
Castings 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.
The 773D frame provides for ease of serviceability.
Rollover Protection Structure (ROPS)
The Rollover Protection Structure (ROPS) attaches securely to four castings welded into the frame.
The suspension system is designed to dissipate haul road and loading impacts for extended frame life.
Caterpillar builds a variety of rugged, durable bodies to perform in the toughest mining applications.
773D bodies are designed to handle a variety of material densities. Maximum payload is reached in three to five passes from a matched Cat loader.
Sidewall and Floor Junctions
Sidewall and floor junctions are joined by 5-sided beams to resist impact loading and sustained hauling stresses.
Box-section beams offer increased durability in the floor, sidewalls, top rail, corner and cab canopy areas.
400 Brinell Steel
400 Brinell steel wear surfaces provide excellent wear resistance and are easily welded without preheating procedures.
Two-stage hoist cylinders provide fast dump cycle times.
The standard body comes exhaust heated with options including a full-time muffler or exhaust diverter.
Custom attachments including tail extensions, liner packages, sideboards and other custom designs are offered to help ensure rated payload.
Control ease and comfort maximizes productivity.
The wraparound dash panel is provided in an easy line-of-sight arrangement, using LED backlit rocker switches.
The Caterpillar Contour Series Air Suspension seat is standard. The seat is fully adjustable and includes an adjustable right-hand armrest.
Tilt/telescoping steering wheel with ergonomic grip improves comfort and control.
Transmission console has LED backlit gear numbers and ergonomic shift knob.
Exceptional all-around visibility reduces fatigue and improves productivity.
Integral, sound-suppressed ROPS/FOPS Cab is resiliently mounted providing a quiet, protected work environment.
Front Brake Cut-out Switch
Front brake cut-out switch increases front brake component life.
Large storage compartment is located under the trainer's seat.
Trainer'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.
A standard heater and optional air conditioner with four-speed fan and nine vents.
Ergonomically designed foot pedals for increased operator comfort. Secondary brake moved to floor.
Electric power window for simplified operation.
Electrohydraulic 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 Protection
With 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.
ARC 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.
ARC 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.
ARC results in improved component life, optimized system cooling capability and reduced torque fluctuations result from the precision of ARC.
Self Diagnostic Capability
ARC results in faster troubleshooting and diagnosis with self-diagnostic capability and the ability to communicate with ET through the CAT Data Link System.
Operator 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.
TCS provides operator awareness through an on-dash indicator, signifying TCS is engaged.
TCS utilizes normal differential action to provide superior maneuvering in poor underfoot conditions.
TCS divides torque equally to reduce stress created on final drives and axles when torque is transferred to one side.
TCS maintains the back-up design. Should the sensors fail, normal differential action is still available to maintain control and steering.
The 773D is designed for versatility.
Body options include a full line of standard and custom designs based on specific customer preference, material density, loading tools and site conditions.
A full line of tire options, representing various manufacturers, is offered by Caterpillar to maximize performance and life for specific applications.
Attachments 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 Approach
The 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.
The 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 Switch
A ground-level battery disconnect switch facilitates safe, convenient servicing and maintenance.
Diagnostics with CEMS
On-board diagnostics with CEMS provides the machine operator with a three-category warning system and quick access to stored diagnostic data.
Diagnostics with ET
Off-board diagnostics with ET allows service technicians access to stored diagnostics data reducing down time and lowering operating costs.
Radial seal air filters are easy to change, reducing air filter maintenance times.
Vertical, spin-on oil filters provide for simplified servicing.
Quick coupler pressure taps, located in all hydraulic systems, provide clear, quick pressure checks. SOS oil analysis points make oil sampling quick, clean, and easy.
Sealed electrical connectors lockout dust and moisture. The color-coding for wires is standard for the entire Cat product line.
Machine Management Service
Cat dealers help manage equipment investments.
The Caterpillar worldwide computer network locates parts instantly to minimize machine downtime.
Caterpillar manuals are easy to use and help provide the full value of an equipment investment.