798 AC
Cat Mining Trucks are engineered for performance, designed for comfort and built to last. These powerful haul trucks are able to move more material at a lower cost.
798 AC
Cat Mining Trucks are engineered for performance, designed for comfort and built to last. These powerful haul trucks are able to move more material at a lower cost.
Specifications
AC Drive System
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Total Reduction Ratio35:01:00
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Top Speed - Loaded40 mile/h 64 km/h
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Generator/AlternatorBrushless, engine mounted, dual bearing
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ControlsIGBT Inverter Technology, air cooled, pressurized cabinet with filtration
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Wheel MotorCat high-torque AC induction, rear axle mounted
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Cooling SystemCat variable speed, hydraulically driven cooling system
Body Hoists
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TypeTwin, two-stage hydraulic cylinders with snubbing valve.
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Pump Flow - High Idle257.3 gal/min 964 l/min
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Relief Valve Setting - Raise3029 psi 20884 kPa
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Body Raise Time - High Idle21 s 21 s
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Body Lower Time - Float22 s 22 s
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Body Power Down- High Idle17.5 s 17.5 s
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Note (1)Twin, two-stage hydraulic cylinders mounted outside main frame; double-acting cylinders in both stages.
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Note (2)Power raise in both stages; power down capability in both stages.
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Note (3)Automatic body-lower modulation reduces impact on frame.
Braking System
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Service BrakesFour-Corner, Wet Disc, Oil Cooled, Hydraulically Actuated
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Front Wet Disc Brake Surface Area22642 in² 146081 cm²
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Rear - Wet Disc Brake Surface Area32730 in² 211163 cm²
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StandardsService and Secondary: ISO 3450:2011
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Electric RetardingRadial Grid Design
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Dynamic Retarding Power - Continuous5480 hp 4086 kW
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Parking BrakesFour-corner, Multi-disc, Spring Applied, Hydraulically Released
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Load BrakeRear service brakes
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NoteAnti-Lock Brake System (ABS) optional with CMD package
Cab
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Air ConditioningHFC - 134A refrigerant: 21,600 Btu/h
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Heater / Defroster24600 Btu/h 24600 Btu/h
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NoteAmbient capabilities down to -15C (5F) for heater/defroster and up to 50C (122F) for air conditioning.
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ROPS Standards (1)ROPS (Rollover Protective Structure) meets ISO 3471:2008 for Operator and ISO 13459:2012 for Trainer.
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FOPS StandardsFOPS (Falling Objects Protective Structure) meets ISO 3449:2005 Level II for Operator and ISO 13459:2012 Level II for Trainer.
Capacity - HE Body - 100% fill factor
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Struck129-200 m³ (168-261 yd³)
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Heaped (SAE 2:1)218-276 m³ (285-361 yd³)
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NoteContact your local Cat dealer for body recommendations.
Dimensions (Approximate)
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Height - Top of ROPS22.1 ft 6720 mm
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Overall Length51.44 ft 15679 mm
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Wheel Base21.9 ft 6674 mm
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Rear Axle - Tail16.07 ft 4898 mm
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Dump Clearance - Empty5.72 ft 1744 mm
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Loading Height - Empty25.54 ft 7784 mm
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Overall Height - Body Raised48.85 ft 14890 mm
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Centerline Front Tire Width23.06 ft 7028 mm
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Front Axle Clearance - Loaded2.81 ft 855 mm
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Overall Canopy Width (with rock deflectors)33.15 ft 10103 mm
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Outside Body/Canopy Width (without rock deflectors)31.62 ft 9639 mm
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Inside Body Width29.44 ft 8973 mm
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Front Canopy Height - Empty26.01 ft 7928 mm
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Rear Axle Clearance - Loaded2.8 ft 854 mm
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Centerline of Rear Dual Tire Width19.5 ft 5943 mm
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Overall Tire Width - Empty30.27 ft 9226 mm
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Overall Length (High Altitude only)51.87 ft 15810 mm
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NoteDimensions listed includes canopy deflectors
Engine
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Gross Power - SAE J19953500 hp 2610 kW
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Engine ModelCat® C175-16
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Net Power - SAE J13493405 hp 2539 kW
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Optional Gross Power - SAE J19953100 hp 2312 kW
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Rated Speed1800 r/min 1800 r/min
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Emissions RatingFuel Optimized
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Bore6.9 in 175 mm
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Stroke8.7 in 220 mm
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Displacement5187 in³ 85 l
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Note (1)Net Power advertised is the power available at the flywheel when the engine is equipped with air intake system, exhaust system, and alternator.
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Note (2)U.S. EPA Tier 4 Final / EU Stage V available for applicable markets.
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Note (3)Additional fuel optimized selectable power ratings: 2312 kW / 3,100 hp
Engine - High Altitude Only
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Engine ModelCat® C175-20
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Gross Power SAE J1995:20144150 hp 3095 kW
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Net Power - SAE J1349:20114000 hp 2983 kW
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Rated Speed1750 r/min 1750 r/min
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Emissions RatingFuel Optimized
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Bore6.9 in 175 mm
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Stroke8.7 in 220 mm
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Displacement6469 in³ 106 l
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Note 1Net Power advertised is the power available at the flywheel when the engine is equipped with air intake system, exhaust system, and alternator.
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Note 2Additional fuel optimized selectable power rating: 2983 kW / 4,000 hp
Service Refill Capacities
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Fuel Tank1300 gal (US) 4922 l
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Fuel Tank (Tier 4)1200 gal (US) 4542 l
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Diesel Exhaust Fluid Tank100 gal (US) 379 l
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Cooling System211 gal (US) 799 l
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Crankcase82 gal (US) 310 l
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Final Drive - Each67 gal (US) 254 l
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Hydraulic System - Including Tank385 gal (US) 1458 l
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Hydraulic Tank296 gal (US) 1121 l
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Grease Tank90 lb 41 kg
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Note (1)DEF Tank only available for U.S. EPA Tier 4 Final / EU Stage V engine option
Service Refill Capacities - High Altitude Only
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Fuel Tank2000 gal (US) 7571 l
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Cooling System273 gal (US) 1032 l
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Crankcase124 gal (US) 471 l
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Hydraulic Tank273 gal (US) 1032 l
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Hydraulic System (includes tank)342 gal (US) 1296 l
Sound
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Sound StandardsThe operator sound pressure level, 75 dB(A), measured according to ISO 6394:2008 and ISO 6396:2008.
Steering
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Steer Angle39 ° 39 °
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Turning Diameter - Front106.3 ft 32.4 m
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Steering StandardsISO 5010:2019
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NoteTurning Diameter (ISO 7457:1997)
Suspension
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TypeSelf-contained nitrogen/oil cylinders, pin-to-pin mounting, top & bottom double shear clevis attachments
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Effective Cylinder Stroke - Front10 in 254 mm
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Effective Cylinder Stroke - Rear5 in 133.35 mm
Tires
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Rims44" x 63" Rims
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Standard Tires59/80 R63
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Note (1)Quick Change Rims optional.
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Note (2)Caterpillar recommends the customer evaluate all job conditions and consult tire manufacturer for proper tire selection and TKPH (TMPH) capabilities.
Weight Distributions - Approximate
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Front Axle - Empty47 % 47 %
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Rear Axle - Empty53 % 53 %
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Front Axle - Loaded33 % 33 %
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Rear Axle - Loaded67 % 67 %
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NoteWeight distributions optimized with Cat body.
Weights - Approximate
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Nominal Rated Payload410 ton (US) 372 t
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Rated Gross Machine Weight1375000 lb 623690 kg
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Chassis Weight453826 lb 205852 kg
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Body Weight Range38 833 - 43 275 kg (85,611 - 95,406 lb)
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Note (1)Consult your tire manufacturer for maximum tire load.
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Note (2)Chassis weight with 100% fuel, hoist, body mounting group, rims, and tires.
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Note (3)Body weight varies depending on how body is equipped.
Benefits
SAFETY
- Greater visibility thanks to wide field of view from the cab and radial retard grid that improves right-hand view.
- Safer access and egress with 600-mm-wide (23.6-in-wide) ladders, flat deck, toe kicks, and optional power access stair attachment.
- Confidence-building features such as anti-rollback, traction controls, reverse shift inhibitor, Automatic Retarding Control, and door sensor warning for park brake application.
- Full dynamic retarding through a compact radial grid, backstopped by the proven design of Caterpillar four-corner oil-cooled brakes, for stable handling and confident stopping.
- Fully independent secondary brake system that provides emergency controllability with a hydraulically actuated secondary brake pedal that serves as a backup to electronic controls.
PRODUCTIVITY
- The most efficient electric drive truck in its size class — moving more tonnes per liter (tons per gallon) and hauling more material faster—so you can move more over the course of a shift, or haul the same amount of material with fewer trucks.
- Available with higher horsepower to boost productivity in deeper pits, plus electronically-selectable lower horsepower settings that allow the 798 to better align with mixed fleets.
- Ease of operation and reduced costs thanks to deep integration of Cat engine, AC drive system, hydraulics and controls.
- End-to-end visibility of all truck parameters for optimized fuel efficiency, speed on grade and parasitic loads across the operating range.
- Excellent slow speed control within service areas as well as superior motor torque and acceleration pulling away from the shovel.
OPERATOR COMFORT
- Ergonomic cab layout, excellent all-around visibility, and controls, levers and switches that are positioned for ease of use.
- Automatic climate control and reduced vibration and sound.
- Next generation seat with height adjuster, adjustable shoulder stock to keep the seatbelt from rubbing, and seat back, side and lumbar bolsters to increase stability.
SERVICEABILITY
- High displacement, low rpm rating and conservative horsepower ratings, which mean more time on the haul road and less time in the shop.
- Inlet manifolds and turbochargers that are located outside of the engine's V, giving the service technicians more space to work on top of the engine and within the engine bay.
- Sealed and pressurized inverter cabinet that requires no cleaning, eliminating hundreds of hours of maintenance over the life of the truck/
- Engine walkways and service platforms, modular components, service-friendly layout and ground-level grouped service points.
- Extended oil change interval (up to three times) with standard engine equipment including Centrifugal Oil Filter (COF) and Self-Cleaning Filter (SCF).
DURABILITY AND LONG LIFE
- First overhaul life of 25,000 hours for lower cost of ownership, with proven C175 engine and electric drive system.
- Highly validated and proven straight frame rail design that eliminates the bends and breaks that can occur at stress concentrations.
- Outstanding durability delivered by box section construction that uses Caterpillar proprietary steel specification for excellent welding characteristics.
- Increased frame life thanks to deep section main rails in critical areas of the frame lower stress levels.
- Frame, powertrain, engine and components that are built to be rebuilt — delivering multiple lives of like-new performance at a fraction-of-new price.
PROVEN AC DRIVE & POWERTRAIN
- High voltage system that operates at lower current than most competitive trucks, contributing to higher efficiency, lower heat generation, smaller and lighter components, and longer component life.
- Radial style retarding grid with AC electric motor that requires no regular motor maintenance and is quieter and lighter than box grids.
- State-of-the-art high voltage IGBTs for maximum AC drive system efficiency, and a dual-bearing brushless alternator that delivers long life and less maintenance, with no shimming required.
- AC Drive dynamic retarding for continuous retarding power; AC electric motor that reduces maintenance; and state-of-the-art high voltage IGBTs for maximum AC drive system efficiency.
- Variable hydraulic blower fan, which provides optimized cooling even at idle for increased component performance and life.
SUSTAINABILITY
- Designed to use less fuel, which reduces engine emissions and carbon footprint.
- Optional U.S. EPA Tier 4 Final / EU Stage V engine, which reduces NOx by 62% and particulates by 93% when compared to Tier 1 emissions.
- Reduced waste thanks to Centrifugal Oil Filter (COF), standard self-cleaning engine filter, extended oil change intervals and reduced oil usage.
- Engines compatible with diesel fuel blended with lower-carbon intensity fuels such as biofuels and renewable fuels, plus power options like trolley.
- Cat Rebuild and Cat Reman programs, which preserve raw materials, conserve energy and reduce emissions.
TECHNOLOGY SOLUTIONS
- Equipped with standard Product Link™ Elite monitoring system, which delivers health and payload information to keep performance high and enable proactive maintenance planning.
- Factory-ready for fully integrated Cat MineStar™ Command for hauling, an autonomous hauling solution proven to increase productivity up to 30%.
- Optional MineStar Fleet, a fleet monitoring system, to measure, manage and maximize the overall hauling operation.
- Optional MineStar Detect proximity detection system, which uses cameras to give operators a better view of what's happening around their equipment.
- Optional in-cab Cat Driver Safety System (DSS) intervenes when operator fatigue or distraction are detected.
CAT BODIES
- Bodies designed to fit with the chassis, sized to meet payload requirements and work as part of the truck system.
- High Efficiency (HE) dump body option that is lightweight, simplified and durable.
- With unique minimal structure design, HE body provides long life while minimizing weight for increased payload.
- HE body sized and configured to meet the specific needs of the mine, dictated by fragmentation, abrasion, cohesion and the loading tool.
Equipment Info
POWER TRAIN
Cat® C175-16 Diesel Engine: 2610 kW (3,500 hp) Fuel Optimized , U.S. EPA Tier 2 equivalent (available for applicable markets)
OPERATION AND CONTROLS
Integrated ROPS/FOPS cab, insulated/sound suppressed
ELECTRICAL
Audible Alarm, backup
ADDITIONAL FEATURES AND EQUIPMENT
Accumulators (Steering & Brake) – Australian and Canadian certified
CAT® TECHNOLOGY PRODUCTS
Cat® MineStar™ Detect (Radar and Camera) System
DUMP BODY
High Efficiency (HE) body, 218-276 m³ (285-361 yd³)
– HE Body Mounting Group
– Rock ejectors (chain)
– HE Body Mounting Group
– Rock ejectors (chain)
ANTIFREEZE
Cat Extended Life Coolant (ELC) protects to –35° C (–30° F)
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