789C Mining Truck

The 789C Off-highway Truck is engineered for performance, designed for comfort, and built to last. The 789C is designed for high production and low cost-per-ton hauling in mining and construction applications. It has a reliable and durable operation and the rugged construction and easy maintenance guarantee long life with low operating costs.

Mechanical Power Train



Completely designed and manufactured by Caterpillar to assure maximum efficiency, high quality, extended service life and low operating costs.

Component Match



The CAT mechanical power train is designed for optimum component match. A wide application range is available in each gear.

TransmissionChassis Control TCC



TransmissionChassis Control TCC module communicates over the CAT Data Link with the engine ECM to manage engine speed during shifts for increased clutch life and operator comfort.

Torque Converter



Lockup torque converter combines the maximum rimpull and cushioned shifting of torque converter drive with the efficiency and performance of direct drive.

Transmission



Sixspeed, planetary power shift transmission is designed for the high horsepower of the 3516B engine.

Final Drives



Large, differential and doublereduction final drives provide torque multiplication of 28.81 to further reduce stress on the drive train.

Steering System



The hydraulic steering system provides precise, controllable steering.

Rims and Wheels



Cat center mounted rims and cast rear wheels are mounted using studs and nuts to minimize maintenance and provide outstanding durability.

EnginePower Train Integration



Combining the electronic engine control with the Caterpillar electronically programmable transmission control allows these critical power train components to work more intelligently.

CAT Data Link



The CAT Data Link electronically connects the engine and transmission controls to optimize overall power train performance, reliability and component life for reduced power train operating costs.

Controlled Throttle Shift



Engine rpm is regulated during a shift to reduce driveline torque stress for smoother shifts, extended component life and improved operator comfort.

Directional Shift Management



Directional shift management regulates engine speed during directional shifts to prevent damage caused by high speed directional changes.

Neutral Coast Inhibitor



Neutral coast inhibitor prevents the transmission from shifting to neutral at speeds above 6.5 kmh 4 mph.

Bodyup Shift Inhibitor



Bodyup shift inhibitor prevents the transmission from shifting above the preprogrammed gear without the body fully lowered.

Reversed Neutralized with Bodyup



If the hoist lever is activated and the transmission is in reverse, the transmission will automatically shift to neutral.

Engine Overspeed Protection



The transmission control senses possible overspeed conditions and up shifts one gear. If overspeed conditions occur in top gear, the lockup clutch is disengaged.

Programmable Top Gear



The transmission top gear may be electronically set using ET. This feature helps operators maintain speed limits.

Antihunt Function



The transmission will not allow an upshift or downshift for approximately 2.3 seconds after a shift has occurred. This prevents gear hunting when operating near a shift point and minimizes transmission shifts to increase component life.

Downshift Inhibitor



The transmission will not allow a down shift to occur until engine speed reaches the downshift point, preventing an engine overspeed condition.

Improved DiagnosticsServiceability



The electronic engine and transmission controls provide enhanced diagnostic capability.

Electronic Technician ET



Electronic Technician ET allows for easy access to service diagnostic data through the use of a single service tool.

Integrated Braking Control IBC



Integrated Braking Control IBC combines braking control enhancements into one system for efficiency and simplification.

Brakes



Reliable braking gives operators the confidence to concentrate on truck operation and maximum productivity.

Disc Brakes



Caterpillar fourwheel forced oilcooled, multiple disc brakes are continuously cooled for exceptional, nonfading braking and retarding.

Oilcooled Disc Brakes



Oilcooled disc brakes are designed with large discs and plates for reliable, adjustmentfree operation providing superior performance and service life in comparison to shoetype and drydisc system.

Oil Film



An oil film prevents direct contact between the discs. The film absorbs the braking forces by shearing the oil molecules. The heat generated is transferred to the oil and carried away to oil coolers, extending brake life.

Pistons



A Caterpillar patented, twopiston design combines the service, secondary, parking brake, and retarding functions in the same robust system.

Primary Piston



The primary piston is hydraulically actuated and provides both service and retarding functions.

Secondary Pistons



The secondary piston is springapplied and is held in the disengaged position by hydraulic pressure.

Brake System



The brake system is designed so that, in the event hydraulic system pressure drops below a specified level, the springapplied secondary piston automatically applies the brakes.

Fuel



No fuel is used during retarding. The engine provides additional retarding by running against compression on downhill hauls.

Four Corner Retarding



Four corner retarding with 6040 percent split rearfront in braking effort provides superior control in slippery conditions.

Structures



The backbone of the Cat truck.

Frame



The 789C frame uses a boxsection design and deep penetrating, continuous welds resist damage from heavy loads without adding extra weight.

Castings



Castings have large radii with internal reinforcing ribs to dissipate stresses that can cause fatigue and cracking.

Rollover Protection Structure ROPS



Rollover Protection Structure ROPS is integral to the cab and frame. The cab is resiliently mounted to the frame to reduce vibration and noise levels.

Suspension System



The suspension system is designed to dissipate haul road and loading impacts.

Cylinders



Four independent variable rebound suspension cylinders absorb shocks before forces get to the mainframe. This extends frame life and provides the operator a more comfortable ride.

Rear Cylinders



Rear cylinders allow axle oscillation and absorb the bending and twisting stresses caused by uneven and rough haul roads rather than transmit them to the main frame.

Front Cylinders



Front cylinders are mounted to the frame and serve as steering kingpins.

Caster and Camber



Front wheel caster and camber are set at the factory, no longer requiring field adjustments.

Operators Station



Control the truck with ease and comfort to maximize productivity.

Visibility



Exceptional allaround visibility reduces strain and fatigue allowing confident maneuverings and increased productivity.

Cab



Integral, soundsuppressed ROPSFOPS Cab is standard.

Seat



Ergonomically designed, air suspension seat is fully adjustable for operator comfort.

Hoist Control



Electric hoist control is mounted next to the operators seat for ease of operation. This is a low effort control to minimize operator input.

Brake Pedal



Secondary brake pedal is located on the floor to provide easy operator control.

Displays



Vital Information Management System 40VIMS41 displays and operator key pad for precise machine status information.

Steering Wheel



Tilt and telescoping steering wheel improves operator access and comfort.

Transmission Console



Transmission console has been redesigned with backlit gear indicators and ergonomic shift knob.

Storage



Large storage compartment is located under the trainer seat.

Trainer Seat



Trainer seat has wide hip and shoulder room. A back rest and seat belt are standard. An optional air suspended seat is available.

Operator Window



Powered operator window is standard. Sliding trainer seat window is standard.

Operator Controls



Operator controls for turn signal, high beam, intermittent windshield wiper, windshield washer and horn have been redesigned for operator efficiency and comfort.

Heater and Air Conditioner



Standard heater and air conditioner have a more efficient design, permitting increased flow, modulation, and serviceability. These systems provide fresh, pressurized, temperaturecontrolled air circulation.

Radio



Radio ready cab prewired with power converter, speakers, wiring harness, and antenna. Provision for addon communication systems.

Vital Information Management System 40VIMS41



Provides operators, service technicians and managers with vital machine and production data.

Caterpillar Designed System



Vital Information Management System 40VIMS41 is an integrated Caterpillar designed system that monitors machine performance to provide critical information on a realtime basis.

Gauge Cluster



Gauge cluster in the cab maintains a constant display of several, machine functions.

Vital Information Management System Keypad



Vital Information Management System keypad allows the operator or service technician to access through the message center, gauge values realtime and stored information. The keypad can also be used by service personnel to access diagnostic information.

Message Center



Message center displays operator requested information and utilizes a threecategory warning system to alert the operator to an abnormal machine condition.

Alert System



The threecategory alert system provides advisory information on an exception basis to the operator via the message center on abnormal machine conditions.

Category I



Category I activates the alert indicator lamp when a system condition has been identified.

Category II



Category II, a warning lamp located above the gauge cluster flashes in addition to the Category I alert indicator lamp in the display panel.

Category III



Category III, the highest alert, sounds an audio action alert in addition to the Category II alarms. The action lamp and alert remain on until the system readings return to normal or the machine is shut down.

Trouble Shooting



The Vital Information Management System simplifies trouble shooting, reduces down time and lowers operating costs by allowing minor problems to be corrected before they cause extensive damage.

Production Management



Production management, a feature component of the Vital Information Management System 40VIMS41, enhances truck and loading tool effectiveness for improved fleet productivity and reduced operation and maintenance cost.

Catdeveloped Technology



Production management utilizes Catdeveloped technology to sense strut pressure to determine payload weight accuracy.

Truck Production



Production management maximizes truck production while avoiding future costs and downtime related to overloading.

External Lights



External lights on both sides of the truck signal loading tool operator when to cease loading.

Cycles



The Vital Information Management System stores 2400 cycles for a record of payload weight, cycle segment times, cycle segment distances and actual clock time and date of each cycle.

Data Accessibility



Data can be accessed through the message center, transmitted via optional radio or downloaded for detailed analysis.

Accuracy



The Vital Information Management System is accurate to within plus or minus 5 percent of the actual weight over a normal operating shift.

OffTruck Software Package



The Vital Information Management System offtruck software program VIMSPC allows service personnel to download a complete record of production information, machine data events and system diagnostics to a laptop computer.

Wellmanaged Operations



Wellmanaged mining operations focus on maximizing production and reducing costs, which should result in lower costperton. When used properly, the Vital Information Management System can be used to increase productivity and reduce costs.

Engine



The field proven 3516B EUI engine delivers the power and reliability necessary to perform in the worlds most demanding mining application.

Torque Rise



The torque rise provides high lugging force during acceleration and less down shifting on grade or in soft underfooting for faster cycle times.

Electronic Unit Injector EUI



Electronic Unit Injector EUI is a proven highpressure, direct injection fuel system.

Electronic Control Module ECM



Electronic Control Module ECM utilizes advanced engine management software to monitor, control and protect the engine utilizing selfdiagnosing electronic sensors.

Pistons



Twopiece articulated pistons utilize a deep bowl, low crevice volume design that enhances combustion efficiency, improves fuel efficiency and lowers emissions.

Aftercooler



Separate circuit aftercooler allows the aftercooler coolant to operate at lower temperatures than jacket water for a denser air charge in the combustion chamber.

EUI Results



3516B EUI has improved fuel efficiency by three percent NOx levels are reduced by 20 percent and transient smoke levels are down by as much as 15 percent. No derating up to 2290 m 7,500 ft.

Reliability and Durability



500 hour service interval for engine oil, oil and fuel filter changes, increasing mechanical availability and production.

Integrated Braking Control IBC



Electronically combines Automatic Retarding Control ARC and the Traction Control System 40TCS41 into one, integrated control system.

Production



Automatic Retarder Control results in increased production with faster downhill speeds. By maintaining consistently higher engine speeds, overall truck speed will be higher than a manually controlled truck.

Controllability



Automatic Retarder Control results in excellent controllability and reduced operator effort. Automatic brake modulation provides a smoother ride, better control in slippery conditions and allows the operator to focus more on driving.

Troubleshooting



Automatic Retarder Control results in faster troubleshooting and diagnosis with selfdiagnostic capability and the ability to communicate with ET through the CAT Data Link.

Operator Fatigue



Automatic Retarder Control results in reduced operator fatigue resulting from ease of operation.

Engine Overspeed Protection



Automatic Retarder Control results in engine overspeed protection.

Automatic Retarder Control Production Advantages



Automatic Retarder Control can increase vehicle speed by as much as 15 percent over manual retarder control.

Traction Control System 40TCS41



Traction Control System 40TCS41 improves traction and truck performance in poor underfoot conditions by electronically monitoring and controlling wheel slippage.

Axle Sensors



Axles sensors monitor wheel speed. If slippage exceeds a set limit, the oil cooled disc brakes engage to slow the spinning wheel. Torque is then automatically transferred to the wheel with better traction.

Differentials



Utilizes normal differential action to provide superior maneuvering in poor underfoot conditions.

Truck Body Systems



Caterpillar builds a variety of rugged, durable bodies to perform in the toughest mining applications.

DualSlope Body Design



Standard dualslope body design provides excellent load retention, a low center of gravity and clean dumping characteristics.

Top Rail



Reinforced, rolled steel top rail increases body strength and protects the body from damage caused by the loading tool or falling material.

Slope



Eight degree V reduces shock loading and centers the load.

Box Beams



Boxbeams in floor, sidewalls, top rail, corner and cab canopy areas provide added impact resistance.

Flat Floor Body Design



Flat floor body design provides smooth, metered dumping and higher dump clearances.

Custom Options



Custom truck body options are available to match individual mine applications. These products are specifically designed to match material hauled and provide an extended service life.

Liner Options



Liner options are available to help extend the body systems life. A variety of steel grades provide options to absorb impacts while resisting abrasion.

Customer Support and Serviceability



Caterpillar machines are designed to spend less time down for maintenance, allowing more time on the job.

Parts Availability



Most Cat parts are immediately available off the shelf. Cat dealers rely on our worldwide computer network to find parts instantly and minimize your machine downtime.

Flexible Financing



Your dealer can arrange attractive financing on the entire line of Cat equipment.

Machine Management Service



Cat dealers help manage your equipment investments.

Literature Support



Operation and maintenance manuals are easy to use helping you get the full value of your equipment investment.

Remanufactured Components



Remanufactured components are economically available for many Caterpillar components.

Groundlevel Access



Groundlevel access provides convenient servicing to tanks, filters and compartment drains, as well as engine shutdown capability.

Electronic Technician



Caterpillar Electronic Technician ET accesses machine data easily. It quickly runs tests, makes calibrations and retrieves system data to help find and correct problems before they become costly failures.

Maintenance Platform



The maintenance platform provides access to engine, air filters, steering hydraulic tank and battery compartment.

Automatic Lubrication System



The automatic lubrication system provides grease to necessary components on a regular basis to reduce maintenance and improve machine availability.

Fast Fill Service Center



Fast fill service center Wiggins features high speed fuel and oil exchange.

Scheduled Oil Sampling



Scheduled Oil Sampling valves speed sampling and analysis reliability.

Oil Renewal System 40ORS41



Oil Renewal System 40ORS41 is an option available which extends oil change intervals and reduces waste oil handling by continuously burning oil from the sump through normal engine operation.

Cylinder Heads



Individual, interchangeable engine cylinder heads can be removed easily for visual inspection of internal parts.

Inframe Access



Inframe access allows maintenance and minor repairs without major component removal.

Quick Coupler Pressure Taps



Quick coupler pressure taps are located in most hydraulic systems providing clear, quick pressure checks and diagnostics.

Air Filters



Radial seal air filters are easy to change, reducing time required for air filter maintenance.

Electrical Connectors



Sealed electrical connectors lockout dust and moisture. Wires are color coded for easy diagnosis and repair. Wiring harnesses are braided and have a protective sheath to prevent damage.


Operating Specifications
Nominal Payload Capacity
195 tons
Top Speed - Loaded
33.8 mph
Minimum Payload Capacity
174.11 tons
Maximum Payload Capacity
195 tons
Maximum Capacity Struck (SAE)
96 yd3

Engine
Engine Model
Cat® 3516 TA-EUI
Net Power
1791 hp
Net Power - SAE J1349
1770 hp
Rated Power
1750 hp
Net Power - Cat
1791 hp
Net Power - ISO 9249
1791 hp
Net Power - 80/1269/EEC
1791 hp
Bore
6.7 in
Stroke
7.5 in
Displacement
4211 in3
Gross Power - SAE J1995
1900 hp

Weights - Approximate
Gross Machine Operating Weight (GMW)
700000 lb
Chassis Weight
209930 lb
Operating Weight - Empty
288078 lb
Operating Weight - Loaded
700000 lb

Transmission
Forward 1
7.5 mph
Forward 2
10.1 mph
Forward 3
13.7 mph
Forward 4
18.5 mph
Forward 5
25 mph
Forward 6
33.8 mph
Reverse
6.8 mph

Suspension
Effective Cylinder Stroke - Front
12.5 in
Effective Cylinder Stroke - Rear
6.5 in

Body Hoists
Pump Flow - High Idle
193 gal/min
Relief Valve Setting - Raise
2500.16 psi
Body Raise Time - High Idle
18.86 Seconds
Body Lower Time - Float
17.31 Seconds
Body Power Down - High Idle
15.58 Seconds

Approximate Weights - Dual Slope
Chassis
209929 lb
Body
57940 lb
Front Axle - Empty
46.9 %
Front Axle - Loaded
33.6 %
Rear Axle - Empty
53.1 %
Rear Axle - Loaded
66.4 %

Service Refill Capacities
Fuel Tank
851 gal
Cooling System
175 gal
Crankcase
77 gal
Steering Tank
34 gal
Steering System (Includes Tank)
50 gal
Brake/Hoist Hydraulic Tank
140.28 gal
Torque Converter/Transmission System (Includes Sump)
59.17 gal

Dimensions
Height to Top of ROPS
18.03 ft
Overall Body Length
38.17 ft
Inside Body Length
26.75 ft
Overall Length
39.95 ft
Wheelbase
18.7 ft
Rear Axle to Tail
11.87 ft
Ground Clearance
3.85 ft
Dump Clearance
4.36 ft
Loading Height - Empty
17.08 ft
Inside Body Depth - Max
8.58 ft
Overall Height - Body Raised
39.05 ft
Operating Width
25.18 ft
Centerline Front Tire Width
17.81 ft
Engine Guard Clearance
3.92 ft
Outside Body Width
22.77 ft
Inside Body Width
21.33 ft
Rear Axle Clearance
4.02 ft
Centerline Rear Dual Tire Width
15.16 ft
Overall Tire Width
22.72 ft

Weight Distributions - Approximate
Front Axle - Empty
46.9 %
Rear Axle - Empty
53.1 %