Top Performance.
Developed specifically for high production mining and construction applications, the785C Mining Truck keeps material moving at high volume to lower your cost-per-ton.
Reliable, Durable Operation.
Rugged construction and easy maintenance procedures ensure long life with low
operating costs.
Power Train – Engine
The Cat 3512B engine is built for power, reliability and efficiency for superior performance in the toughest applications
Engine.
The Cat 3512B EUI twin turbocharged and aftercooled dieselengine delivers high power and reliability in the world’s most demanding
mining applications. The 3512B is a 16-cylinder, four-stroke design that uses
long, effective power strokes for more complete fuel combustion and optimum
efficiency.
EPA Compliant.
The 3512B engine is compliant with U.S. Environmental Protection Agency Tier I emissions standards.
Altitude Compensation.
Designed for maximum operating efficiencies at altitudes under 3048 m (10,000 ft).
High Torque Rise.
The 23 percent torque rise provides unequalled lugging force during acceleration, on steep grades and in rough underfoot conditions. Torque rise effectively matches
transmission shift points for maximum efficiency and fast cycle times.
Enhanced Life.
High displacement, low rpm rating and conservative horsepower ratings mean more time on the haul roads and less time in the shop.
Two-Piece Piston Design.
Two-piece articulated pistons with a deep bowl, low volume crevice design enhances
combustion efficiency, improves fuel efficiency and lowers emissions.
Electronic Unit Injection (EUI).
The electronically controlled unit injection fuel system senses operating conditions
and regulates fuel delivery for optimum fuel efficiency. The proven high-pressure
fuel system provides improved response times and more efficient fuel burn with
lower emissions and less smoke.
Electronic Control Module (ECM).
ECM utilizes advanced engine management software to monitor,
control and protect the engine utilizing self-diagnosing electronic sensors.
The computerized system senses operating conditions and power requirements and adjusts engine for peak performance and most efficient operation and at all times.
Separate Circuit Aftercooler.
Allows the aftercooler circuit to operate cooler than jacket water temperature for a denser air charge and greater combustion.
Oil Renewal System.
Optional oil renewal system extends engine oil change intervals from 500 hours to
4000 hours or more to increase machine availability.
Engine Protection.
Computerized system electronically protects the engine during cold starts, high altitude
operation, air filter plugging, and high exhaust temperature.
Power Train – Transmission
Cat mechanical power train delivers more power to the ground for greater productivity and lower operating costs
Mechanical Power Train.
The Cat mechanical drive power train and power shift transmission provides unmatched
operating efficiency and control on steep grades, in poor underfoot conditions, and on haul roads with high rolling resistance.
1) Transmission.
The Cat six-speed planetary power shift transmission is matched with the direct-injection 3512B diesel engine to deliver constant power over a wide range of operating speeds.
Robust Design.
Designed for the higher horsepower of the 3512B engine, the proven planetary power shift transmission is built tough for long life between overhauls.
Long Life.
A dedicated oil tank and circuit provides cooler, cleaner oil for maximum performance and longer component life.
Transmission Chassis Control (TCC).
TCC uses electronically transferred engine rpm data to execute shifts at preset points for optimum performance, efficiency and clutch life.
2) Lock-Up Torque Converter.
Combines maximum rimpull and cushioned shifting of torque converter drive with the
efficiency and performance of direct drive. Engages at approximately 8 km/hr (5 mph), delivering more power to the wheels
Lock-Up Clutch.
Quickly releases and re-engages to reduce power train torque loads for smoother shifting, long life and a more comfortable ride.
Smooth Shifting.
Individual clutch modulation provides smooth clutch engagements to optimize performance and extend clutch life.
3) Final Drives.
Cat final drives work as a system with the planetary power shift transmission to deliver maximum power to the ground. Built to withstand the forces of high torque and impact loads, double reduction final drives provide high torque multiplication to further
reduce drive train stress.
Steering System.
Hydraulic steering control system is designed for exceptional smoothness and precise
control. A separate circuit prevents cross contamination for long life.
Supplemental Steering.
Supplemental steering system uses pressure accumulators and allows up to three
90 degree turns in case of engine failure.
Wheels and Rims.
Cast rear wheels and Cat center-mount rims are mounted using studs and nuts to minimize maintenance and maximize durability.
Engine/Power Train Integration
Electronically combines critical power train components to work more intelligently and to optimize overall truck performance
Cat Data Link. Electronically integrates machine computer systems to optimize overall power train performance, increase reliability and component life, and reduce operating costs
Controlled Throttle Shifting. Regulates engine rpm during shifting to reduce power train stress and clutch wear by controlling engine speed, torque converter lock-up and transmission clutch engagement for smoother shifts and longer component life
Directional Shift Management. Regulates engine speed during directional shifts to prevent damage caused by high speed directional changes.
Neutral Coast Inhibitor. Prevents transmission from shifting to neutral at speeds above 6.5 km/h (4 mph) to protect the transmission from operating with insufficient lubrication.
Body-up Reverse Neutralizer. Automatically shifts the transmission to neutral if the hoist lever is activated while transmission is shifted in reverse.
Body-up Shift Inhibitor. Prevents the transmission from shifting above a pre-programmed gear without the body fully lowered.
Overspeed Protection. The transmission control electronically senses engine conditions and automatically up-shifts one gear to prevent overspeeding.
If overspeeding occurs in top gear, the lock-up clutch is disengaged.
Programmable Top Gear. Transmission top gear maximum can be set using the ET service tool to help the operator maintain speed limits.
Anti-Hunt Function. Prevents gear hunting when operating near a shift point and minimizes shifts by not allowing an upshift or downshift immediately after a shift has occurred for increased component life.
Downshift Inhibitor. Prevents engine overspeeding by keeping the transmission from downshifting until engine speed reaches the downshift point.
Electronic Technician (ET). ET service tool provides service technicians with easy access to stored diagnostic data through the Cat Data Link to simplify problem diagnosis and increase machine availability.
Diagnostic Capability. Critical data from the electronic engine and transmission controls, including transmission shifting, engine speed and fuel consumption, provides service technicians with enhanced diagnostic capability to reduce downtime and operating costs.
Integrated Braking Control (IBC).
IBC integrates Automatic Retarder Control and Traction Control into one system for optimum performance and efficiency
Caterpillar Brake System
Reliable braking with superior control gives the operator the confidence to focus on productivity.
Integrated Braking System. The Cat oil-cooled braking system delivers reliable performance and control in the most extreme haul road conditions. The integrated system combines the service, secondary, parking brake and retarding functions in the same robust system for optimum braking efficiency
Cat Data Link. All control modules communicate via the Cat Data Link and work together as an integrated system to maximize production efficiency and extend component life
Oil-Cooled Multiple Disc Brakes. Caterpillar four-wheel, forced oil-cooled, multiple disc service brakes are continuously cooled by water-to-oil heat exchangers for exceptional non-fade braking and retarding performance
Brake Design. Cat oil-cooled disc brakes are designed with large discs and plates for reliable, adjustment-free operation and performance. Brakes are completely enclosed and sealed to prevent contamination and reduce maintenance.
Long Life. An oil film prevents direct contact between the discs. This design absorbs the braking forces by shearing the oil molecules and carrying heat away to extend brake life.
Pistons. The Caterpillar two-piston design combines the service, secondary, parking brake and retarding functions in the same system. The primary piston hydraulically actuates both service and retarding functions. The secondary piston is spring-applied and held in
the disengaged position by hydraulic pressure. If hydraulic system pressure drops below a specified level, the spring-applied secondary piston automatically applies the brakes.
Parking Brake. Oil-cooled, spring- applied, hydraulically released parking brake is applied to all four wheels for superior parking capability on all grades up to 15 percent.
Integrated Braking Control (IBC). Combines Automatic Retarder Control (ARC) and Traction Control System (TCS) into one integrated brake control system for optimum efficiency, performance and reliability.
Automatic Retarder Control (ARC). Electronically controls retarding on grade to maintain optimum engine rpm and oil cooling. Additional braking may be applied using the manual retarder
or the brake pedal. ARC is deactivated when the operator applies the brakes or throttle.
Four Corner Retarding. Four corner retarding with 60/40 percent split (rear/front) in braking effort provides superior control in slippery conditions. Balanced front to rear brake torque provides exceptional braking performance and minimizes wheel lock-up, especially during retarding.
Faster Speeds. ARC allows the operator to maintain optimum engine speeds for faster downhill hauls and greater productivity.
Superior Control. Automatic brake modulation offers a smoother ride and better control in slippery conditions, allowing the operator to concentrate on driving.
Ease of Operation. ARC increases operating ease, resulting in greater operator confidence with less fatigue.
Engine Overspeed Protection. Automatically activates ARC when engine speed exceeds factory preset levels, regardless of operator inputs, to avoid potentially damaging engine overspeeds.
Fuel Efficiency. The engine provides additional retarding by running against compression on downhill hauls.
During retarding applications the engine ECM does not inject fuel into the cylinders for exceptional fuel economy.
Traction Control System (TCS). Electronically monitors and controls rear wheel slippage for greater traction and enhanced truck performance in poor underfoot conditions. 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.
Differential Action. Normal differential action provides superior maneuvering and control in slippery conditions
Structures
Rugged Cat structures are the backbone of the 785C mining truck’s durability.
Box-Section Design. The 785C frame uses a box-section design, incorporating two forgings and 24 castings in high stress areas with deep penetrating and continuous wrap-around welds to resist damage from twisting loads without adding extra weight
Steel Structures. Mild steel used throughout frame provides flexibility, durability and resistance to impact loads, even in cold climates, and allows for easy field repairs.
Castings. Castings have large radii with internal reinforcing ribs to dissipate stress in areas of high stress concentration. Castings move welds to lower stress areas for greater frame life.
Rollover Protective Structure (ROPS). Integral to the cab and frame, ROPS is resiliently mounted to reduce vibration and noise levels.
Suspension System. Designed to dissipate haul road and loading impacts for longer frame life and a more comfortable ride
Cylinders. Four independent self-contained, oil pneumatic,
variable-rebound suspension cylinders are designed to absorb shocks in the most severe applications.
Front. Front cylinders with preset caster and camber are mounted to the frame and serve as steering kingpins for a tight turning radius with excellent maneuverability and low maintenance
Rear. Rear cylinders allow axle oscillation and absorb bending and twisting stresses caused by uneven and rough haul roads rather than transmitting them to the main frame
Operator’s Station
Ergonomically designed for operator comfort, superior control and high productivity.
Ergonomic Layout. The 785C operator station is ergonomically designed for total machine control in a comfortable, productive and safe environment.
All controls, levers switches and gauges are positioned to maximize productivity and minimize operator fatigue
Quiet Cab. Integral, sound-suppressed ROPS/FOPS cab is resiliently mounted
to the mainframe to isolate the operator from sound and vibration for a quiet,
secure and comfortable ride.Viewing Area. Designed for excellent all-around visibility and clear sight lines to the haul road, the large viewing area enables the operator to maneuver with confidence for high productivity.
1. Air Suspension Seat. Ergonomically designed, fully adjustable air suspension seat with adjustable armrests provides optimal driving comfort. A wide,retractable seat belt provides a secure, comfortable restraint.
2. Hoist Levers. Low effort electronic hoist control is mounted next to the operator’s seat for ease of operation.
3. Secondary Brake Pedal.
Conveniently located on the floor for easy operator control
4. Monitoring System. VIMS features an easy-to-read display and easy-to-use operator input keypad for precise machine status information.
5. Steering Column. Offers tilt and telescoping steering features to provide a comfortable driving position.
6. Transmission Console. Designed with backlit gear indicators and ergonomic shift knob.
7. Storage Compartment. Located under the trainer seat for a safe, uncluttered working environment
8. Trainer Seat. Full-size, fully padded trainer seat features a backrest, wide hip and shoulder room, and seat belt for secure travel.
9. Operator Window. Powered operator window and sliding trainer seat window offer simple operation and an excellent unobstructed view.
10. Operator Controls. Easy to reach turn signal, high beam, intermittent windshield wiper and windshield washer controls are designed for optimum efficiency and comfort
11. Heating/Air Conditioning. Efficient design provides fresh, pressurized, temperature-controlled air circulation for a comfortable working environment in any climate.
Radio Ready. Cab is prewired with power converter, speakers, wiring harness, antenna and provision for add-on communication systems
Monitoring System
Vital machine health and payload data keeps the 785C performing at peak production levels.
1. VIMS Interface Module
2. Transmission/Chassis Control (TCC)
3. Integrated Braking Control (IBC)
4. Engine Control Module (ECM)
5. Sensors
6. CAT Data Link
7. Diagnostic Connector (ET)
8. Gauge Cluster Module
9. Message Center Module
10. Data Port (VIMS-PC)
11. Action Lamp
12. Action Alarm
13. Service Lamp
14. Payload Lamps
15. Radio System
Vital Information Management System (VIMS). Intelligent Caterpillar designed machine monitoring system provides critical machine health and payload data in real-time to keep the 785C performing at top production levels.
Integrated System Monitoring. Sensors located throughout the machine systems enable VIMS to quickly exchange and monitor information from all machine systems for efficient, high performance operation.
Advanced Diagnostics. VIMS simplifies troubleshooting, reduces downtime and lowers operating costs by identifying abnormal conditions before they cause extensive damage
Data Access. Monitoring and diagnostic information is stored on-board until
it can be downloaded for analysis. Data can be accessed through the message center, transmitted via optional radio or downloaded onto a computer for detailed analysis.
Machine Management. Service technicians or mine management can download data and generate reports for better machine management. Data can be used to improve effectiveness of scheduled maintenance programs, maximize component life, improve machine availability, and lower operating costs.
Gauge Cluster. Conveniently located gauge cluster maintains a constant display of vital machine functions, including:
* engine coolant temperature
* brake oil temperature
* air system pressure
* fuel level
Speedometer/Tachometer/Gear Indicator. Backlit display offers excellent operator visibility.
Keypad. Provides operator or service technician immediate access to current machine information, gauge values and stored data through the message center display
Message Center. Displays messages requested by operator and advises operator of abnormal machine conditions.
Alert System. Three-category warning system alerts operator of abnormal machine health conditions.
• Category I. Machine or system needs attention.
• Category II. Requires operator to evaluate and correct situation before continuing work.
• Category III. Immediate shutdown required to prevent serious damage to machine or system.
Production Management. True Weight Production Management provides accurate production reporting by utilizing suspension strut pressure differentials and advanced algorithm to weigh the truck after it moves away from the loading tool and shifts into second gear. Production data enhances truck and loading tool effectiveness and fleet productivity, and minimizes overloading to reduce downtime and lower operating and maintenance costs
Data Storage. VIMS stores up to 2400 cycles for a complete record of payload weight, cycle times, distances and actual dates/times.
Payload Lights. External lights on both sides of the truck signals loading tool operator when to cease loading for optimum payloads without overloading.
Road Analysis Control (RAC). Optional system monitors haul road conditions by measuring frame rack and pitch to improve haul road maintenance, cycle times, tire life and fuel efficiency.
VIMS-PC. VIMS-PC, the off-board reporting software program, allows service personnel to download a complete record of machine health and productivity data to a laptop computer for diagnosis and analysis. Easy-to-use software enables service technicians and mine management to generate health and payload reports for more effective machine management.
VIMS Supervisor. Optional software allows mine management to easily manage and interpret VIMS data for optimum fleet management and productivity.
Truck Body Systems
Cat designed and built for rugged performance and reliability in the toughest mining applications
Cat Truck Bodies. Caterpillar offers three specific body styles and custom body options to help customers obtain the lowest cost-per-ton hauling solution.
* Dual-Slope
* Flat Floor
* Mine Specific Design (MSD
Body Selection. Selection of the right body depends on material and haul road conditions. The better the match of body to application, the greater the efficiency. Your Cat dealer can help you select the right body system for your site specific applications
Body/Chassis Integration. Caterpillar truck bodies are designed and matched with the integrated chassis system for optimum structural reliability, durability and long life.
Fast Hoist Cycle Times. Two-stage hoist cylinders provide fast dump cycle times of 15.2 seconds for raise and 16.2 seconds for dump.
Body Design. Cat truck bodies are designed for optimal strength, capacity and durability. Wear surfaces are equipped to handle even the toughest impact and abrasion over the long haul without diminishing capacity.
* Five-Sided Beams tie in the sidewall and floor junctions add increased body rigidity and strength.
* Wide Ribs in body floor provide increased durability and impact support.
* Full-Length Stringers create strength and rigidity throughout the bed.
* Box Section Beams offer increased durability in the floor, sidewall, top rail, corner, and cab canopy areas
Custom Body Options. Tail extensions, sideboards, tumblebars, rock boxes and rock shedders are available to maintain rated payload, reduce spillage, and improve hauling efficiencies.
Sideboards are designed to maximize or attain gross machine weight.
Tail extensions are used to help retain the rear portion of the pile
and limit load spillage on haul roads, extending tire life.
1. Dual-Slope Body. The advanced dual-slope body design with V-shaped floor increases load retention, maintains a low center of gravity, reduces shock loading, and maintains optimum load distribution on steep inclines and in challenging haul road conditions.
* Reinforced, rolled steel top rail increases body strength and protects the body from damage caused by the loading tool or falling material.
* 8 degree “V” reduces shock loading and centers the load.
* 7.5 degree forward body slope and 16 degree ducktail slope helps retain loads on steep grades.
2. Flat Floor Body. The flat floor design with slight incline delivers excellent payload capacity, high dump clearances and smooth, controlled dumping.
* Flat floor design provides consistent wear characteristics on body tail.
* 12 degree forward body slope provides good load retention on better maintained haul roads.
* 400 Brinell steel on surfaces provides excellent wear
3. Mine Specific Design (MSD) Body. The MSD body is based on the flat floor design and is customized to maximize payload potential and minimize cost- per-ton. Each MSD body design begins with a detailed mine site profile to develop a body suitable for a mine’s individual needs.
Body Liners. A variety of liner options are available to save weight and help extend the body system’s life. Wear surfaces and liners are equipped to handle tough impact loads while resisting abrasion. Wear plates deliver long life in high wear areas.
Matched Systems. For full truck payloads with minimum loading time, an efficient loading/hauling system starts with a perfect match. The 785C is matched with specific Cat loading tools to maximize volume of material moved at the lowest cost-per-ton.
* 5130B – 7 pass/match
* 5230B – 5 pass/match
* 994D – 4 pass/match
Serviceability
Less time spent on maintenance means more more time on the haul roads
Servicing Ease. Easy access to daily service points simplifies servicing and reduces time spent on regular maintenance procedures. Enhanced serviceability and 500-hour service intervals are designed to increase machine availability and productivity.
Maintenance Platform. Provides access to engine, air filters, steering hydraulic tank and battery compartment.
In-Frame Access. Permits easy access to major components for easy servicing and removal
Ground-Level Access. Allows convenient servicing to tanks, filters, drains, and engine shutdown. Ground-level VIMS data port permits easier downloading
of information.
Autolube. Automatic lubrication system reduces maintenance time by automatically lubricating necessary components on a regular basis.
Fast Fill Service Center. Wiggins fast fill service center features high speed fuel and oil exchange
Oil Renewal System (ORS). Optional system extends oil change intervals and reduces waste oil handling by continuously burning oil from the engine oil pan through normal engine operation. Make-up oil must be continually added to compensate for oil burned
Scheduled Oil Sampling. S.O.S sampling valves speed sampling and analysis reliability.
Pressure Test Points. Disconnect valves are conveniently located throughout
the hydraulic systems for easy pressure testing.
Air Filters. Radial seal air filters are easy to change, reducing time required for air filter maintenance.
Sealed Electrical Connectors. Electrical connectors are sealed to lock out dust and moisture. Harnesses are braided for protection. Wires are color coded for easy diagnosis and repair.
Cylinder Heads. Individual cylinder heads are interchangeable for easy removal and visual inspection of internal parts.
On-Board Diagnostic Systems. VIMS continuously checks all critical machine functions and components, and helps locate faults quickly for faster repair. Electronic control system enables quick diagnosis of engine conditions and effective maintenance and repairs utilizing the Electronic Technician (ET) service tool.
* Ratings based on standard air conditions of 25° C (77° F) and 99 kPa (29.32 Hg) dry barometer. Power based on fuel having API gravity of 35 at 16° C (60° F) and an LHV of 42 780 kJ/kg (18,390 BTU/lb) when engine used at 30° C (86° F).
* No engine derating required up to 3050 m (10,000 ft) altitude.
* Compliant with U.S. Environmental Protection Agency Tier I emissions standards
Dimensions
All dimensions are approximate.
Retarding Performance
To determine retarding performance: Add lengths of all downhill segments and, using this total, refer to proper retarding chart. Read from gross weight down to the percent effective grade. Effective grade equals actual % grade minus 1% for each 10 kg/t (20 lb/ton) of rolling resistance. From this weight-effective grade point, read horizontally to the curve with the highest obtainable gear, then down 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 33.00-R51 tires.
NOTE: Select the proper gear to maintain engine rpm at the highest possible level, without overspeeding the engine. If cooling oil overheats, reduce ground speed to allow transmission to shift to the next lower speed range
Gradeability/Speed/Rimpull
To determine gradeability performance: Read from gross weight down to the percent of total resistance. Total resistance equals actual percent grade plus 1% for each 10 kg/t (20 lb/ton) of rolling resistance.
From this weight-resistance point, read horizontally to the curve with the highest obtainable gear, then down to maximum speed. Usable rimpull will depend upon traction available and weight on drive wheels
THANK YOU FOR YOUR VISITED
PRODUCT KNOWLEDGE 785 OFF-HIGHWAY TRUCK
Reviewed by heri
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5:26 AM
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Reviewed by heri
on
5:26 AM
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