Cat® 3516B Electronic Unit Injection EngineGross power at 1750 rpm 1715 kW 2300 hpFlywheel power at 1750 rpm 1615 kW 2166 hp

Body capacity (SAE 2:1) 129 m3 169 yd3

Max. operating weight 376 488 kg 830,000 lbPayload weight

Standard configuration 218 metric tons 240 tons

®®

793CMining Truck

2

793C Mining TruckEngineered for performance, designed for comfort, built to last.

Mechanical Power TrainStarting with the high torque rise,Caterpillar® 3516B, Electronic UnitInjection (EUI) diesel engine, through theelectronic, six-speed power shifttransmission, the mechanical power trainis designed and built by Caterpillar,assuring the highest standards forquality, performance, efficiency andreduced operating costs.pg. 4-5

Oil-cooled Disc BrakesCaterpillar four-wheel forced oil-cooled, multiple disc brakes arecontinuously cooled for exceptional,non-fade braking and retarding. TheIntegrated Braking Control (IBC)system integrates the AutomaticRetarder Control (ARC) on all wheelsand Traction Control System (TCS) onthe drive wheels into one system toenhance truck performance andproductivity, and improve operatorconfidence. pg. 8

Engine Power Train IntegrationThe Caterpillar intelligent power traincombines engine, transmission andbrake information over the CAT DataLink to optimize overall truckperformance. The CAT Data Linkallows the engine and transmission toelectronically exchange information sothe components work together as asystem for increased component life andimproved operator comfort. TheElectronic Technician (ET) softwareprogram can access stored diagnosticdata to significantly reduce downtimeand improve troubleshooting. pg. 6-7

Total performance.The 793C is designed for high production,assuring lowest cost-per-ton hauling in miningapplications.

Reliable, durable operation.Rugged construction and easy maintenanceguarantee extended life with low operatingcosts.

4

3

Vital Information Management System(VIMS)VIMS monitors vital machine systemsand functions. It helps coach theoperator in the operation of the machineand alerts him to out of specificationconditions. Down time is reduced byallowing service personnel to accessmachine data for faster, more accuratediagnosis. VIMS provides informationto enhance equipment management,increase productivity and reduce costper ton. pg. 13-14

StructuresCaterpillar truck frames are built toresist the most severe, twisting highimpact applications. Mild steel providesflexibility, durability, and resistance toimpact loads. The frame incorporates 22 castings and two forgings in highstress areas for increased strength andextended life. pg. 10

4 New feature

Operator’s StationThe 793C operator’s station has beensignificantly improved over previousmodels by ergonomically designing fortotal machine control in a comfortableand productive environment. Allcontrols, levers, switches and gaugesare positioned to maximize productivityand minimize operator fatigue.Electronic hoist control provides ease ofoperation. The integral ROPS structureprovides superior operator protection. pg. 12

4

4

EngineThe field proven 3516B EUI engine delivers the power and reliability necessary to perform in the world’s most demanding mining applications.

The Caterpillar Electronic Unit Injector(EUI) diesel engine is a four-strokedesign that uses long, effective powerstrokes for more complete fuelcombustion and optimum efficiency.The 3516B is a high displacement andlow operating rpm engine, designed forextended hours of service betweenscheduled overhauls and reducedoperating costs.

The 23 percent torque rise provideshigh lugging force during accelerationand less down shifting on grade or insoft underfooting for faster cycle times.Torque rise effectively matches thetransmission shift points to maximizeefficiency and yield higherperformance.

The 3516B engine provides unmatchedcombustion efficiency:

n Electronic Unit Injector (EUI) is aproven high-pressure, direct injectionfuel system. New components of thefuel system provide 22 percent higherinjection pressures than the previousgeneration of 3500 engines. Thehigher pressures provide improvedresponse time and more efficient fuelburn with lower emissions and lesssmoke.

n Electronic Control Module (ECM)utilizes advanced engine managementsoftware to monitor, control andprotect the engine utilizing self-diagnosing electronic sensors. Themodule controls a wide spectrum ofengine functions, providing infinitelyvariable injection timing to maintainpeak performance.

n Two-piece articulated pistons utilizea deep bowl, low crevice volumedesign that enhances combustionefficiency, improves fuel efficiencyand lowers emissions.

n Series turbocharging utilizes anelectronically controlled waste gatesystem and next generation, highefficiency turbos, allowing higher airpressures moving through thecombustion chamber for improvedefficiency, lower exhaust gastemperatures and improved response.

n Separate circuit aftercooler allowsthe aftercooler coolant to operate atlower temperatures than jacket waterfor a denser air charge in thecombustion chamber.

Results:

n 3516B EUI has improved fuelefficiency by three percent; NOxlevels are reduced by 20 percent andtransient smoke levels are down by asmuch as 15 percent. No derating up to3660 m (12,000 ft).

Proven reliability, durability andenhanced serviceability:

n 500 hour service interval for engineoil, oil and fuel filter changes,increasing mechanical availabilityand production.

n Engine replacement and installationtimes reduced by more than 40percent compared to previous modelsthrough redesign of engine andhydraulic systems.

n Additional electronic protection of theengine during cold starts, highaltitude operations, air filter pluggingand high exhaust temperatureconditions.

n Quick diagnosis of engine conditionsenable effective maintenance andrepairs utilizing the ElectronicTechnician (ET) service tool.

5

Mechanical Power TrainCompletely designed and manufactured by Caterpillar to assure maximum efficiency, highquality, extended service life and low operating costs.

n The torque converter andtransmission utilize a common oilcircuit with fewer hoses andconnections to provide a simplersystem, with cooler, cleaner oiland extended component life.

3 Large, differential and double-reduction final drives provide torquemultiplication of 28.8:1 to furtherreduce stress on the drive train.

The hydraulic steering system providesprecise, controllable steering:

n The steering system is a separatecircuit from the other hydrauliccircuits to prevent crosscontamination and provide easierserviceability.

n Supplemental steering is provided byaccumulators for emergency use.Designed to provide at least three 90degree turns after engine failure.

Cat center mounted rims and cast rearwheels are mounted using studs andnuts to minimize maintenance andprovide outstanding durability.

The CAT mechanical power train isdesigned for optimum componentmatch. A wide application range isavailable in each gear. A 35 percentstep between each gear allows thetransmission to utilize the full torquerange of the 3516B engine, resulting infewer shifts for extended power trainlife.

n Overall power train efficiency ofbetween 82 and 85 percent ismaintained up to 15 percent effectivegrade.

n Electric drive power train trucksproduce their peak efficiency of 76 to79 percent at approximately five toseven percent effective grade.

n Higher power train efficiencyprovides faster truck speeds with lessfuel consumption.

Transmission/Chassis Control (TCC)module communicates over the CATData Link with the engine ECM tomanage engine speed during shifts forincreased clutch life and operatorcomfort. When the transmission is insixth gear, the engine is allowed to runout to 2000 rpm, so the truck canachieve speeds up to 55 km/h (34 mph).The shifts points are set at the factoryfor optimal performance, efficiency andcomponent life.

n TCC monitors and records keyoperating conditions and parametersfor later downloading and diagnostictroubleshooting by service personnel.

1 Lock-up Torque Converter combinesthe maximum rimpull and cushionedshifting of torque converter drivewith the efficiency and performanceof direct drive. The lock-up clutchengages at approximately 7.2 km/h(4.5 mph). During shifts the lock-upclutch quickly releases and re-engages to reduce power train torqueloads. This action provides forsmoother shifting, extendedcomponent life, and increasedoperator comfort.

n Rimpull at stall is 1005 kN(225,900 lb) – 28 percentgradeability at maximum operatingweight.

2 Six speed, planetary power shifttransmission is designed for the highhorsepower of the 3516B engine. Thedesign makes the transmission morerobust, with an extended life betweenoverhauls. To accomplish this thetransmission utilizes:

n Larger and additional clutch discsand plates to transmit thehorsepower.

n Increased piston size to lowerclutch unit pressure, increasingservice life of clutch discs androtating seals.

n Additional gears in planetary setsto increase gear and bearing life.Spreads loads over more contactarea.

1

2

3

6

Engine/Power Train IntegrationInformation from the engine and transmission work together intelligently to maximize production, efficiency and extend service life of the components.

The CAT Data Link electronicallyconnects the engine and transmissioncontrols to optimize overall power trainperformance, reliability and componentlife for reduced power train operatingcosts. To lower operating cost-per-tonthe system incorporates:

n Controlled throttle shift. Engine rpmis regulated during a shift to reducedriveline torque stress for smoothershifts, extended component life andimproved operator comfort.

n Directional shift managementregulates engine speed duringdirectional shifts to prevent damagecaused by high speed directionalchanges. This prevents shifts intoreverse when forward ground speedsare in excess of 4.8 km/h (3 mph).This protects the transmission fromhigh shock loads created by abusivedirectional shifts.

n Neutral coast inhibitor prevents thetransmission from shifting to neutralat speeds above 6.5 km/h (4 mph).This protects the transmission againstoperating with insufficientlubrication.

n Body-up shift inhibitor prevents thetransmission from shifting above thepre-programmed gear without thebody fully lowered.

n Reverse neutralized with body-up. If the hoist lever is activated and thetransmission is in reverse, thetransmission will automatically shiftto neutral.

n Engine overspeed protection. Thetransmission control senses possibleoverspeed conditions and up shiftsone gear. If overspeed conditionsoccur in top gear, the lock-up clutchis disengaged.

n Programmable top gear. Thetransmission top gear may beelectronically set using ET. Thisfeature helps operators maintainspeed limits. Reprogramming of thetop gear can only be accomplishedwith the ET service tool.

n Anti-hunt function. The transmissionwill not allow an upshift ordownshift for approximately 2.3seconds after a shift has occurred.This prevents gear hunting whenoperating near a shift point andminimizes transmission shifts toincrease component life.

n Downshift inhibitor. The transmissionwill not allow a down shift to occuruntil engine speed reaches thedownshift point, preventing an engineoverspeed condition.

1

2

10

9

11

VIMS

VIMS MainModule

7

n Electronic Technician (ET) allowsfor easy access to service diagnosticdata through the use of a singleservice tool.

n ET accesses data stored in the engineand transmission controls via theCAT Data Link. Information ontransmission shift data, engine speed,fuel consumption and other data canbe retrieved by ET.

1 Gauge Cluster Module

2 Message Center Module

3 Integrated Braking Control (IBC)

4 Transmission/Chassis Control (TCC)

5 Brakes

6 Wheel Sensor

7 Transmission

8 CAT Data Link

9 Engine Control Module (ECM)

10 Sensors

11 Electronic Unit Injector (EUI)

Integrated Braking Control (IBC)combines braking controlenhancements into one system forefficiency and simplification. IBCsystems, Automatic Retarder Control(ARC), and Traction Control System(TCS) both utilize the standard oilcooled disc brakes in their operation.

Improved diagnostics/serviceability.The electronic engine and transmissioncontrols provide enhanced diagnosticcapability. The ability to store bothactive and intermittent indicators willsimplify problem diagnosis and totalrepair time, resulting in improvedmechanical availability and loweroperating cost.

3

4

8

56

7

ET

8

Oil-cooled Disc BrakesReliable braking gives operators the confidence to concentrate on truck operation andmaximize productivity.

1 Parking/Secondary Piston

2 Service/Retarding Piston

3 Friction Discs

4 Steel Plates

5 Actuating Springs

6 Cooling Oil In

7 Cooling Oil Out

2

5

4

3

1

6

7

Caterpillar four-wheel forced oil-cooled, multiple disc brakes arecontinuously cooled for exceptional,non-fade braking and retarding. TheIntegrated Braking Control (IBC)combines control of ARC and TCS,utilizing standard oil-cooled brakes toenhance truck performance and increaseproductivity.

Oil-cooled disc brakes are designedwith large discs and plates for reliable,adjustment-free operation, providingsuperior performance and service life incomparison to shoe-type and dry discbrake systems.

An oil film prevents direct contactbetween the discs. The film absorbs thebraking forces by shearing the oilmolecules. The heat generated istransferred to the oil and carried awayto oil coolers, extending brake life.

Caterpillar’s patented, two-pistondesign combines the service, secondary,parking brake and retarding functions inthe same robust system.

n The primary piston is hydraulicallyactuated and provides both serviceand retarding functions.

n The secondary piston is spring-applied and is held in the disengagedposition by hydraulic pressure.

n The brake system is designed so that,in the event hydraulic systempressure drops below a specifiedlevel, the spring-applied secondarypiston automatically applies thebrakes. These brakes are designed tohold a fully loaded truck on a 15percent grade.

No fuel is used during retarding. Theengine provides additional retarding byrunning against compression ondownhill hauls. During retardingapplications the engine ECM does notinject fuel into the cylinders forexceptional fuel economy.

Four corner retarding with 60/40percent split (rear/front) in brakingeffort provides superior control inslippery conditions. Control at all fourcorners increases operator confidencewhen compared to only rear wheeldynamic retarding systems.

9

Integrated Braking Control (IBC)Electronically combines Automatic Retarding Control (ARC) and the Traction ControlSystem (TCS) into one, integrated control system.

ARC Production Advantages2500

2000

1500

1000

500

10Time (Seconds)

20 30 40 50 60

With Automatic Retarder Control(average speed, 1950 rpm)

With Manual Retarder Control(average speed, 1730 rpm)

Engi

ne S

peed

(rpm

)

700

The Automatic Retarder Control (ARC) isan integral part of the intelligent powertrain. It electronically controls retardingon grade to maintain optimum enginerpm and oil cooling. Settings areadjustable from 1850-1950 rpm inincrements of 10 rpm. While ARCmodulates the brakes, the operator mayalso apply additional braking forceusing either the manual retarder or thebrake pedal. When the operator appliesthe throttle, ARC is deactivated. Anauto resume feature reactivates thecontrol without additional operator input.

ARC results in:

n Increased production with fasterdownhill speeds. By maintainingconsistently higher engine speeds,overall truck speed will be higherthan a manually controlled truck.

n Excellent controllability and reducedoperator effort. Automatic brakemodulation provides a smoother ride,better control in slippery conditionsand allows the operator to focus moreon driving.

n Faster troubleshooting and diagnosiswith self-diagnostic capability and theability to communicate with ETthrough the CAT Data Link.

n Reduced operator fatigue resultingfrom ease of operation.

n Engine overspeed protection. ARCwill automatically activate whenengine speed exceeds factory presetlevels, regardless of other operatorinputs, including when the system isturned “off”, to help ensure thatengine overspeed conditions do notoccur.

ARC production advantages (versusmanual retarder control) are illustratedin the chart below.

n ARC can increase vehicle speed byas much as 15 percent over manualretarder control.

n The system allows trucks to operateat maximum speeds with aconsistently high engine speed.

n Truck handling is significantlyenhanced through improved retardingmodulation.

Traction Control System (TCS) improvestraction and truck performance in poorunderfoot conditions by electronicallymonitoring and controlling wheelslippage.

n Axle sensors monitor wheel speed. Ifslippage exceeds a set limit, the oilcooled disc brakes engage to slow thespinning wheel. Torque is thenautomatically transferred to the wheelwith better traction.

n Utilizes normal differential action toprovide superior maneuvering in poorunderfoot conditions. Should thesensors fail, normal differential actionis still available to maintain controland steering.

n Operators feel more confident withthe anti-slip benefits provided by theTCS.

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8

1 2

6

3

4

5

6

7

1 Service Brake Sensor

2 Engine Sensor

3 ARC

4 ARC Switch

5 Brakes

6 Service Brakes

7 Axle Speed Sensor

8 TCS

ARC TCS

793C FRAME

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StructuresThe backbone of the Cat truck.

21

1

Box-section frame design and deeppenetrating, continuous welds resistdamage from heavy loads withoutadding extra weight. Frame repairs canbe made without preheating in ambienttemperatures above 16° C (60° F),avoiding metallurgy degradation.

n Caterpillar truck frames use mildsteel providing flexibility, durabilityand resistance to impact loads evenin cold climates.

n The frame incorporates two forgingsand 22 castings in high stress areas,providing two to three times thestrength of equivalent-sizedfabricated structures.

1 Castings have large radii withinternal reinforcing ribs to dissipatestresses that can cause fatigue andcracking:

n Welds are placed in areas of lowerstress to enhance frame life.

2 Rollover Protection Structure (ROPS)is integral to the cab and frame. Thecab is resiliently mounted to theframe to reduce vibration and noiselevels.

The suspension system is designed todissipate haul road and loadingimpacts:

n Four independent variable reboundsuspension cylinders absorb shocksbefore forces get to the mainframe.This extends frame life and providesthe operator a more comfortable ride.

n Rear cylinders allow axle oscillationand absorb the bending and twistingstresses caused by uneven and roughhaul roads rather than transmit themto the main frame.

n Front cylinders are mounted to theframe and serve as steering kingpins.This provides for a tight turningradius, good maneuverability andreduced truck maintenance. Frontspindles and wheels are rigidlymounted to the cylinder rod ends,eliminating caster and camberadjustments.

n Front wheel caster and camber areset at the factory, no longer requiringfield adjustments.

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Truck Body SystemsCaterpillar builds a variety of rugged, durable bodies to perform in the toughest miningapplications.

1 Standard dual-slope body designprovides excellent load retention, alow center of gravity and cleandumping characteristics.

n Reinforced, rolled steel top railincreases body strength andprotects the body from damagecaused by the loading tool orfalling material.

n Eight degree “V” reduces shockloading and centers the load.

n 7.5 degree forward body slope and16 degree ducktail slope helpsretain loads on steep grades.

n Box-beams in floor, sidewalls, toprail, corner and cab canopy areasprovide added impact resistance.

2 Flat floor body design providessmooth, metered dumping and higherdump clearances.

n Flat floor design improves wearcharacteristics of body tail.

n 12 degree forward slope.

n 400 Brinell steel.

Custom truck body options are availableto match individual mine applications.These products are specificallydesigned to match material hauled andprovide an extended service life. YourCaterpillar Dealer, through CustomProducts, can provide a body systemthat will help you obtain the lowestcost-per-ton hauling solution.

n Lightweight bodies to maximizepayloads in lighter, less abrasivematerial.

n Bodies to allow easy unloading ofsticky materials with high contactadherence qualities.

n Bodies that provide a larger targetarea for the loading tool.

n Miscellaneous products availableinclude: ducktail extensions, sideboards, tumblebars, rock boxes androck shedders.

Liner options are available to helpextend the body system’s life. A variety of steel grades provideoptions to absorb impacts whileresisting abrasion. Numerous optionscan be configured to save weight andextend the life:

n A variety of steel grades: 260, 400and 500 Brinell hardness as well asoverlay coatings.

n Wear plates in high wear areas.

n Attachment options, huck bolting andwelding.

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2

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The 793C operating station isergonomically designed for excellentmachine control in a comfortable,productive and safe environment.

Exceptional all-around visibilityreduces strain and fatigue allowingconfident maneuverings and increasedproductivity.

Integral, sound-suppressedROPS/FOPS Cab is standard. The cab isresiliently mounted to the mainframeand isolates the operator from soundand vibration. (Sound levels are lessthan 80 dB(A) in the operatorcompartment as per SAE J1166 workcycle rating.)

1 Ergonomically designed, airsuspension seat is fully adjustablefor operator comfort.

n Retractable 75 mm (3") wideseat belt provides positive,comfortable restraint.

n Integral adjustable armrest.

2 Electric hoist control is mountednext to the operator’s seat for easeof operation. This is a low effortcontrol to minimize operator input.

3 Secondary brake pedal is locatedon the floor to provide easyoperator control.

4 VIMS displays and operator keypad for precise machine statusinformation.

5 Tilt and telescoping steering wheelimproves operator access andcomfort.

6 Transmission console has beenredesigned with backlit gearindicators and ergonomic shiftknob.

7 Large storage compartment islocated under the trainer seat.

8 Trainer seat has wide hip andshoulder room. A back rest and seatbelt are standard. An optional airsuspended seat is available.

9 Powered operator window isstandard. Sliding trainer seatwindow is standard.

10 Operator controls for turn signal,high beam, intermittent windshieldwiper, windshield washer and hornhave been redesigned for operatorefficiency and comfort.

11 Standard heater and air conditionerhave a more efficient design,permitting increased flow,modulation, and serviceability.These systems provide fresh,pressurized, temperature-controlledair circulation.

Radio ready cab prewired with powerconverter, speakers, wiring harness,and antenna. Provision for add-oncommunication systems.

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1

4

2

5

6

7

8

Operator’s StationControl the truck with ease and comfort to maximize productivity.

910 11

2

13

VIMS is an integrated Caterpillar-designed system that monitors machineperformance to provide criticalinformation on a real-time basis. VIMSmonitors many of the machine’ssystems through a single simple systemthat allows quick exchange ofinformation for smooth, efficientoperations. This helps keep the 793Cperforming at top production levels.

Gauge cluster in the cab maintains aconstant display of several, machinefunctions:

n Engine coolant temperature.

n Brake oil temperature.

n Air system pressure.

n Fuel level.

Speedometer/Tachometer/GearIndicator.

VIMS keypad allows the operator orservice technician to access through themessage center, gauge values (real-time) and stored information. Thekeypad can also be used by servicepersonnel to access diagnosticinformation.

Message center displays operatorrequested information and utilizes a three-category warning system to alertthe operator to an abnormal machinecondition.

The three-category alert systemprovides advisory information on anexception basis to the operator via themessage center on abnormal machineconditions. The information isdisplayed when conditions in amonitored system fall outside aprescribed setting for ordinaryoperations.

n Category I activates the alertindicator lamp when a systemcondition has been identified. (Noaction is required at this time.)Usually all that is required is toinform service personnel on thealerted condition as soon aspossible.

n Category II, a warning lamp(located above the gauge cluster)flashes in addition to the Category Ialert indicator lamp in the displaypanel. Instructions are displayed onhow machine operation should bemodified or which service shouldbe performed.

n Category III, the highest alert,sounds an audio action alert inaddition to the Category II alarms.The action lamp and alert remainon until the system readings returnto normal or the machine is shutdown.

Vital Information Management System (VIMS)Provides operators, service technicians and managers with vital machine and productiondata.

SERVICELAMP

VMSRS-232PORTSERVICE

KEYSWITCH

PAYLOADMANAGEMENT

LAMPS

VIMSSERVICE TOOL

ANDSOFTWARE

MESSAGE CENTERMODULE

CAT DATA LINK

SENSORS

SENSORSSENSORS

ACTIONALARM

MAIN MODULE

ACTIONLAMP

VIMS

No. 1 No. 2

VIMSINTERFACE

MODULE

VIMSINTERFACE

MODULE

ENGINECONTROLMODULE

DISPLAYDATA LINK

DIAGNOSTICCONNECTOR

ALERTINDICATOR

QUADGAUGE AND

SPEEDO / TACH

KEYPAD

TRANS./ CHASSISCONTROL

INTEGRATEDBRAKINGCONTROL

RADIOSYSTEM

(Optional)

ET

14

VIMS simplifies trouble shooting,reduces down time and lowers operatingcosts by allowing minor problems to becorrected before they cause extensivedamage. Many sensors are incorporatedinto machine systems to monitorconditions.

Production management, a featurecomponent of VIMS, enhances truckand loading tool effectiveness forimproved fleet productivity and reducedoperation and maintenance cost.

n Utilizes Cat-developed technology tosense strut pressure to determinepayload weight accurately.

n Maximizes truck production whileavoiding future costs and downtimerelated to overloading.

n External lights on both sides of thetruck signal loading tool operatorwhen to cease loading.

n Stores 2400 cycles for a record ofpayload weight, cycle segment times,cycle segment distances and actualclock time and date of each cycle.

n Data can be accessed through themessage center, transmitted viaoptional radio or downloaded fordetailed analysis.

n Accurate to within ±5 percent of theactual weight over a normal operatingshift.

Vital Information Management System (VIMS)Enhances truck and loader effectiveness for improved fleet productivity and reducedoperating and maintenance costs.

Well-managed mining operations focuson maximizing production and reducingcosts, which should result in lower cost-per-ton. When used properly, VIMScan be used to increase productivityand reduce costs.

Payload Weight Distribution

Perc

enta

ge o

f Tot

al L

oads

Payload Weight (Tons)

212

2

1 Recommended Payload Ranges

Inefficient Payload Ranges

3

4

Loads using the Payload Measurement System

Loads with no Payload Measurement System4

3

The VIMS off-truck software program(VIMS-PC) allows service personnel todownload a complete record ofproduction information, machine dataevents and system diagnostics to alaptop computer.

The VIMS-PC program uses thisinformation to generate usable reportsfor better machine management. Theinformation can also be used toestablish a baseline for machineperformance in specific applications,and to:

n Improve the effectiveness ofscheduled maintenance programs.

n Maximize component lives.

n Improve machine availability.

n Lower cost-per-ton.

15

Parts availability. Most Cat parts areimmediately available off the shelf. CatDealers rely on our worldwidecomputer network to find parts instantlyand minimize your machine downtime.

Flexible financing. Your dealer canarrange attractive financing on theentire line of Cat equipment.

Machine management service. CatDealers help manage your equipmentinvestments with:

n Vehicle systems analysis to match theright machine to your job conditions.

n Effective preventive maintenanceprograms.

n Diagnostic programs like ScheduledOil Sampling Analysis and TechnicalAnalysis.

n Exchange components for quickrepairs.

n Remanufactured products or rebuiltcomponents for maximumavailability and lower costs.

n Information to make the most cost-effective repair option decisions.

n Training for operators and mechanics.

Literature support. Operation andmaintenance manuals are easy to usehelping you get the full value of yourequipment investment.

Remanufactured components areeconomically available for manyCaterpillar components.

Ground-level access providesconvenient servicing to tanks, filtersand compartment drains, as well asengine shutdown capability. VIMS hasa ground-level access port for easierdownloading of information.

Caterpillar Electronic Technician (ET)accesses machine data easily. It quicklyruns tests, makes calibrations andretrieves system data to help find andcorrect problems before they becomecostly failures.

The maintenance platform providesaccess to engine, air filters, steeringhydraulic tank and batterycompartment.

Automatic lubrication system providesgrease to necessary components on aregular basis to reduce maintenance andimprove machine availability.

Fast fill service center (Wiggins)features high speed fuel and oilexchange.

Scheduled Oil Sampling (S•O•S) valvesspeed sampling and analysis reliability.

Oil Renewal System (ORS) is an optionavailable which extends oil changeintervals and reduces waste oil handlingby continuously burning oil from thesump through normal engine operation.Make-up oil must be added tocompensate for oil burned.

Individual, interchangeable enginecylinder heads can be removed easilyfor visual inspection of internal parts.

In-frame access allows maintenanceand minor repairs without majorcomponent removal. It also facilitatesmajor component removal andreplacement, if necessary.

Quick coupler pressure taps are locatedin most hydraulic systems providingclear, quick pressure checks anddiagnostics.

Radial seal air filters are easy tochange, reducing time required for airfilter maintenance.

Sealed electrical connectors lockoutdust and moisture. Wires are colorcoded for easy diagnosis and repair.Wiring harnesses are braided and havea protective sheath to prevent damage.

Total Customer Support and ServiceabilityCaterpillar machines are designed to spend less time down for maintenance, allowing more time on the job.

16 793C Mining Truck specifications

TransmissionCaterpillar six-speed, electronically controlled, automatic power shift transmission.

BrakesMeets the SAE J1473 OCT90, ISO 3450-1985 standards up to 376 488 kg (830,000 lb) maximumoperating weight.

Engine3516B Series, 16 cylinder, four-stroke cycle, series turbocharged and aftercooleddiesel engine.

*Power rating conditions

n based on standard conditions of 25° C (77° F) and (29.32 in Hg) dry barometer

n used 35° API gravity fuel having anLHV of 42,780 kJ/kg (18,390 Btu/lb)when used at 30° C (86° F) [ref. a fueldensity of 838.9 g/L (7.001 lb/U.S. gal)]

n net power advertised is the poweravailable at the flywheel when theengine is equipped with fan, aircleaner, muffler and alternator

n no derating required up to 3600 m(12,000 ft) altitude

n automatic derate is included in theelectronic controls

Features

n full electric controln high pressure unit injectionn two hard faced intake and two exhaust

valves per cylinder with valve rotatorsand hard, alloy-steel seats

n self-aligning roller followers on camshaft

n two-piece pistons have steel crowns,thermally isolated aluminum skirts,three rings each and are cooled bydual oil spray

n steel backed, copper-bondedcrankshaft bearings

n hardened crankshaft journalsn dry-type air cleaners with primary and

secondary elements and precleaner n 24-volt electric system with 105-amp

alternator and two 93-amp-hour, low-maintenance, high-output, 12-voltbatteries

Net power kW hp

Caterpillar 1615 2166

ISO 9249 1615 2166

SAE J1349 1599 2144

EEC 80/1269 1615 2166

DimensionsBore 170 mm 6.7 in

Stroke 190 mm 7.5 in

Displacement 69 liters 4211 in3

Ratings at 1750 rpm* kW hp

Gross power 1715 2300

Net power 1615 2166

The following ratings apply at 1750 rpmwhen tested under the specified standardconditions for the specified standard:

Featuresn service brakes

- forced-oil-cooled- air-over-oil actuated- front and rear disc brakes- sealed from dirt and water- individually serviceable as units

n parking brakes- spring-engaged, hydraulically

released- use same disc brakes as service

system- toggle switch activated

n secondary braking- spring-engaged, hydraulically

released- use same disc brakes as service

systemn retarding system

- hand operated friction lever provides modulated engagement of servicebrakes for retarding

- retarding applied to all wheels (40/60split, front rear)

- Automatic Retarder Control standardn traction system

- minimize wheel slip by transferring torque to wheel with traction

- Traction Control System (TCS) standard

Braking surface 224 317 cm2 (34,769 in2)

n each shift is individually modulatedfor maximum smoothness

n shared oil circuit with torqueconverter

n Controlled Throttle Shift andDirectional Shift Managementmaximize shift smoothness andminimize shift driveline stress

n electric control has built-indiagnostics and facility code memory,event memory and programmablefeatures

Maximum travel speeds (40.00-R57 tires)

Radial

km/h mph engine rpm

Forward 1 11.8 7.3 @1960

2 15.9 9.9 @1960

3 21.5 13.4 @1960

4 29.0 18.1 @1960

5 39.4 24.5 @1960

6 54.3 33.7 @2000

Reverse 10.9 6.8 @1960

Features

n six speeds forward and one reversen reverse and first gear are both torque

converter driven with lock-up in firstthrough sixth gears

n single-lever shift control providesautomatic shifting in all gears up tothe one selected by the control lever

17793C Mining Truck specifications

FrameFull box-section with torque tubecrossmember.

Features

n integral front bumpern front box beams for suspension

cylinder and ROPS supportn box-section upper crossmember for

body and ROPS support withattachment points for maintenanceplatform and rear engine hood hingesupport

n castings are used to provide additionalstrength in critical stress areas

n mild-steel plates (310 mPa/42,000 psiminimum yield strength) and castings(241 mPa/35,000 psi minimum yieldstrength) provide:- flexibility- durability- good resistance to impact loads

SuspensionIndependent, self-contained, oil-pneumatic suspension cylinder on eachwheel.

Features

n variable rebound rate reduces impactand smooths ride

n front suspension cylinders are boltedto upper and lower frame members formaximum support

n rear sway bar attaches to frame anddifferential housing, minimizes lateralsway, improves machine handling andoperator comfort

Body HoistsTwin, two-stage hydraulic cylindersmounted outside the main frame.

Features

n pump capacity is 739 L/min (195 gpm) @ 1750 rpm

n relief valve setting is 203.3 bar/20 326kPa (2950 psi)

n body raise time (1960 engine rpm) is20.25 sec.

n body lower time:@ 700 rpm, low idle

- power down 19.25 sec.- float down 19.26 sec.

@ 1960 rpm, high idle- power down 17.51 sec.- float down 19.26 sec.

n power raise in both stages and powerdown in first stage

n pump flow at high idle is 826 L/min(218 gpm)

n automatic body-lower modulation toreduce impact on frame

SteeringSeparate hydraulic system.

Featuresn the steering hydraulic system is

separate from the main hydraulicsystem to prevent cross-contamination

n secondary steering is provided by abladder-type accumulator

n twin, double-acting cylindersn front suspension cylinders serve as

kingpinsn normal and secondary steering

systems meet SAE J1511 OCT90 andISO 5010-1984 standards up tomaximum operating weight376 488 kg (830,000 lb.)

n turning diameter on front wheel track28.4 m (93' 3")

n machine clearance turning circle30.2 m (99' 2")

n steering angle (left or right) 36°

TiresStandard: 40.00-R57

Features

n productive capabilities of the 793CTruck are such that, under certain jobconditions, TKPH (Tmph) limits ofthe tires could be exceeded and,therefore, affect production

n Caterpillar recommends the userevaluate all job conditions and consultthe tire manufacturer to make propertire selection

BodyStandard dual-slope main floor with “V”bottom.

Features

n high-tensile, heat-treated steel sidewall, front wall and floor plates with900 mPa/9000 bar (130,500 psi)minimum yield strength

n exhaust heating is optionaln “V” bottom centers load and

maintains low center of gravityn rear floor “ducktail” helps retain load

and reduces spillagen body options to meet specific mine

application needs are availablethrough your Cat Dealer from CustomProducts

Exterior Sound Rating

n The machine in a standardconfiguration, when measured andoperated as per the prescribed modesin ANSI/SAE J88 JUN86, has a 15 msound pressure level of 89 dB(A) forthe mode that gives the highest level

Effective cylinder stroke:

Front 318 mm 12.5"

Rear 165 mm 6.5"

Rear axle oscillation ±4.9°

Final DrivesDouble-reduction, planetary, with full-floating axles.

Ratios:

Bevel Gear (differential) 1.8:1

Planetary (final drive) 16:1

Total reduction 28.8:1

ROPSIntegral ROPS cab is standard.

Features

n ROPS offered by Caterpillar for themachine meets ROPS criteria: SAE J1040 APR88, SAE J231JAN81, ISO 3471-1994, ISO 3449-1992 LEVEL II

n when correctly installed andmaintained, the cab offered with doorsand windows closed as per work cycleprocedures specified in ANSI/SAEJ1166 MAY90, results in an operatorsound exposure Leq (equivalent soundlevel) of less than 80 dB(A)

n this operator weighted sound exposuremeets OSHA and MSHAoccupational noise exposure criteriaCanopy plate thickness:

Front (40%) 6 mm 0.25"

Rear (60%) 10 mm 0.39"

18 793C Mining Truck specifications

Standard vehicle:(with body option 1) kg lb

Chassis with hoistand body mountinggroup and tires 113 513 250,250

Option 1, body, empty31 138 68,645

Total empty weight 144 651 318,895

Max. operatingweight 376 488 830,000

Weight distribution (standard machine with body option 1):

Empty Loaded

Front Axle 46.9% 33.6%

Rear Axle 53.1% 66.4%

793C

793C 793C

5865 mm(19' 3")empty

1405 mm(4' 7")empty

12 756 mm(41' 10")

8943 mm(29' 4") 1197 mm

(3' 11")

5499 mm(18' 0")empty

12 866 mm(42' 3")

5900 mm(19' 4")

923 mm(3' 0")

3781 mm(12' 5")

5687 mm(18' 8")loaded

13 211 mm(43' 4")empty

2614 mm(8' 7")

6426 mm(21' 1")

7406 mm(24' 4")

6500 mm(21' 4")

6940 mm(22' 9")

7411 mm(24' 4")

5610 mm(18' 5")

6840 mm(22' 5")

1209 mm(4' 0")empty

1066 mm(3' 6")

loaded

4963 mm(16' 3")

49.5°

DimensionsAll dimensions are approximate

Service Refill CapacitiesU.S.

L Gallons

Fuel tank 3785 1000

Cooling system 663 175

Crankcase 292 77

Differential 662 175

Front Wheels, each 21 5.5

Final Drives, each 114 30

Steering Tank 130 34

Steering System (includes tank) 189 50

Brakes and Hoist Tank 580 153

Brakes and Hoist System (includes tank) 1137 300

Torque Converter Sump 76 20

Torque Converter and Transmission System (includes sump) 189 50

Weights(approximate)

NOTE: Standard, dual-slope body shown.

19793C Mining Truck specifications

Gradeability/Speed/Rimpull

To determine gradeability performance:Read from gross weight down to thepercent of total resistance. Totalresistance equals actual percent gradeplus one percent for each 10 kg/t (20 lb/U.S. ton) of rolling resistance.From this weight-resistance point, readhorizontally to the curve with thehighest obtainable gear, then down tomaximum speed. Usable rimpull willdepend upon traction available andweight on drive wheels.

Typical Field Empty WeightOperating Weight830,000 lb/376 820 kg

110

90

70

50

40

30

20

15

10

8

6

4

2

1

Speed

Tota

l Res

ista

nce

(Gra

de p

lus

Rolli

ng R

esis

tanc

e)

0

0 5 10 15 20 25 30 35 40

10 20 30 40 50 60 km/h

mph

200

250

100

50

20

10

5

2

180 250200 300 350 400 500 600 700 800 1000 1200 lb x 1000

kg x 1000

Gross Weight

Rim

pull

200150100 250 300 350 400 500 590

1st Gear

1st Gear

2nd Gear

3rd Gear

4th Gear

5th Gear

6th Gear

2%

4%

6%

8%

10%

20%25%30%

12%

15%

kg x

1000

lb x

1000

Torque Converter DriveDirect Drive

40.00-R57 Tires 1707 mm (67.2") Radius

20 793C Mining Truck specifications

Retarding Performance

Typical Field Empty WeightOperating Weight830,000 lb/376 820 kg

0 100 200 300 400 500 600 700 800 900 lb x 1000

0 50 100 150 200 250 300 350 400 kg x 1000

0 10 20 30 40 50 60 70 80 90 km/h

0 5 10 15 20 25 30 35 40 45 50 55 mph

1st Gear

2nd Gear

3rd Gear

4th Gear

5th Gear

6th Gear

30% 25% 20%15%

10%

5%

SpeedContinuous Grade Length

Effe

ctiv

e G

rade

(Fav

orab

le)

Gross Weight

To determine retarding performance: Add lengths of alldownhill segments and, using this total, refer to properretarding chart. Read from gross weight down to the percenteffective grade. Effective grade equals actual percent grademinus one percent for each 10 kg/t (20 lb/U.S. ton) of rollingresistance. From this weight-effective grade point, readhorizontally to the curve with the highest obtainable gear, thendown to maximum descent speed brakes can properly handle without exceeding cooling capacity. The following charts are

based on these conditions: 32° C (90° F) ambient temperature,at sea level, with 40.00-R57 tires and a properly maintainedcooling system.

NOTE: Select the proper gear to maintain engine rpm at the highestpossible level, without overspeeding the engine. If cooling oiloverheats, reduce ground speed to allow transmission to shift tothe next lower speed range.

21793C Mining Truck specifications

0 100 200 300 400 500 600 700 800 900 lb x 1000

0 50 100 150 200 250 300 350 400 kg x 1000

0 10 20 30 40 50 60 70 80 90 km/h

0 5 10 15 20 25 30 35 40 45 50 55 mph

Grade Distance — 450 m (1500 ft.)

1st Gear

2nd Gear

3rd Gear

4th Gear

5th Gear6th Gear

30% 25% 20%

15%

10%

5% Effe

ctiv

e Gr

ade

(Fav

orab

le)

Gross Weight

Speed

0 100 200 300 400 500 600 700 800 900 lb x 1000

0 50 100 150 200 250 300 350 400 kg x 1000

0 10 20 30 40 50 60 70 80 90 km/h

0 5 10 15 20 25 30 35 40 45 50 55 mph

1st Gear

2nd Gear

3rd Gear

4th Gear

5th Gear6th Gear

30% 25% 20%

15%

10%

5% Effe

ctiv

e Gr

ade

(Fav

orab

le)

Grade Distance — 600 m (2000 ft.)

Gross Weight

Speed

0 100 200 300 400 500 600 700 800 900 lb x 1000

0 50 100 150 200 250 300 350 400 kg x 1000

0 10 20 30 40 50 60 70 80 90 km/h

0 5 10 15 20 25 30 35 40 45 50 55 mph

Grade Distance — 900 m (3000 ft.)

1st Gear

2nd Gear

3rd Gear

4th Gear

5th Gear6th Gear

30% 25% 20%

15%

10%

5% Effe

ctiv

e Gr

ade

(Fav

orab

le)

Gross Weight

Speed

0 100 200 300 400 500 600 700 800 900 lb x 1000

0 50 100 150 200 250 300 350 400 kg x 1000

0 10 20 30 40 50 60 70 80 90 km/h

0 5 10 15 20 25 30 35 40 45 50 55 mph

1st Gear

2nd Gear

3rd Gear

4th Gear

5th Gear6th Gear

30% 25% 20%

15%

10%

5% Effe

ctiv

e Gr

ade

(Fav

orab

le)

Gross Weight

SpeedGrade Distance — 1500 m (5000 ft.)

22 793C Mining Truck specifications

Standard EquipmentStandard equipment may vary. Consult your Caterpillar Dealer for specifics.

Air cleaner (4)Air cleaner access platformAir conditionerAir line dryerAlarm, backupAlternator (105-amp)Automatic Retarder ControlBatteries, 93-amp-hour, low-

maintenance, 12-volt (2)Body mounting groupBody prop cableBrake release motor for towingBrakes system:

Oil-cooled, multiple-disc, frontand rear

ParkingSecondary, emergency

Cab, ROPS:AshtrayCigarette lighterCoat hookDiagnostic connectorElectric window (operator only)Glass, tintedHeater/defroster:

11 070 kCal (43,930 Btu)HornInsulated and sound suppressedLight, dome and courtesyMirrors, right and leftQuad-Gauge Panel:

Air pressureBrake oil temperatureCoolant temperatureFuel level

Seat belts, 75 mm/3" wide

Seat, passenger, with storage areaSpeedometerSteering, automatic supplementalSteering wheel, tilt and telescoping,

paddedStorage compartmentSun visorTachometerTransmission gear indicatorVIMS dataport (2)VIMS keypadVIMS message center with

Universal GaugeWindshield wiper and washer

Crankcase protectionDriveline operator safety guardDumping, auxiliary quick connect for

“buddy dumping”Electrical system, 24-volt to 12-voltEngine – Caterpillar 3516B with

Electronic Injection and Multi PointOil Pressure Sensing

Fast-fill fuel system, WigginsGround level:

Battery disconnectEngine shutdownVIMS Dataport

Lighting system:Backup lights, halogenDirection signals/hazard warning

(rear halogen)Headlights, halogen, with dimmerLH ladder light and service deck

lightsUnder-hood lightStop and tail lights (LED)

Oil change system, quick serviceReservoirs (separate):

Brake/hoistSteeringTransmission/torque converter

Rims, center mounted for40.00-R57 tires

Rock ejectorsStarting aid, ether, automaticSteering, auxiliary quick connect

for towingTie down eyesTow hooks, frontTow pin, rearTraction Control SystemTransmission, six-speed, automatic

power shift, electronic controlprovides Directional ShiftManagement, Controlled ThrottleShifting, downshift inhibitor, reverseneutralizer during dumping, neutralstart switch, reverse shift inhibitor,neutral coast inhibitor and body-upshift inhibitor

Vandalism protection locksVital Information Management System

with Production Management

23793C Mining Truck specifications

Optional EquipmentWith approximate changes in operating weights.Standard equipment may vary. Consult your Caterpillar Dealer for specifics.

kg lb

Bodies see chart below

Body extensions:

Tail (Option 1) 1005 2,214

Tail (Option 2) 787 1,734

Sideboards (Option 1 - increases 1332 2,930capacity to 147.5 m3 / 193 yd3)

Body and tail extension liners (900 mPa/9000 Bar/130,500 psiminimum yield strength; 400 Brinell steel)

Full-length liner (Option 1) 11 052 24,365

Tail extension liner (Option 1 - use with 488 1,075full liners when tail extension used)

Grid liner (Option 2) 1650 3,638(covers rear third of body only)

Tail extension liner, grid (Option 2 - use 535 1,180with grid liner when tail extension used)

Exhaust Arrangement (select one):

Body 294 648

Muffler 168 370

kg lb

Fuel tank (4731 L/1250 gal.) 360 791

Oil Renewal System 11 25

Heater, fuel recirculation type, non-electric 4 9

Heater, engine coolant and oil240-volt external power 60 132

Prelubrication system 24 53

Rim, spare for 40.00-R57 tire 1512 3,334

Shutter group, inside mount 299 660

Starting systems:

Air (TDI Turbine) -22 -49

Air (IR Turbine) -14 -31

Electric 358 789

Variable pitch fan, Flexxaire 273 600

Variable speed fan, Rockford 182 400

Truck Body

CapacityStruck 96.1 m3 125.7 yd3 113 m3 147 yd3

Heaped 2:1 (SAE) 129.4 m3 169.3 yd3 146.0 m3 191.0 yd3

Empty Loading Height 5867 mm 19' 3" 6375 mm 20' 11"

Plate ThicknessSidewall 12 mm .47" 12 mm .47"Front 14 mm .55" 14 mm .55"Bottom 20 mm .79" 20 mm .79"

Weight* 31 138 kg 68,645 lb 32 983 kg 72,650 lb

Specification and Standard Dual-Slope Flat FloorDimensions Option 1 Option 2

* - Standard dual-slope body has no sideboards, tail extension, or liners.* - Flat floor body has 20” sideboards included, no tail extension or liners.

400 Brinell steel is standard.Other options are available through Custom Products. Consult your Caterpillar Dealer for more information.

793C Mining Truck

AEHQ5186-01 (8-98)Replaces AEHQ5186

Featured machines may include additional equipment only for special applications.

See your authorized Caterpillar Dealer for available options.

Materials and specifications are subject to change without notice.

www.CAT.com© 1998 Caterpillar

Printed in U.S.A.