798 AC Electric Drive Mining Truck

The Cat® 798 AC electric drive truck is designed to haul more — with more efficiency, controllability, and reliability than any other electric drive truck in the marketplace. And while it may be a recent addition to the Cat ultra-class lineup, it delivers the same powerful, proven performance you expect from a Cat truck. The 798 AC delivers a payload up to 372 tonnes (410 tons), high speed on grade, easier maintenance, and excellent electric retarding and brake performance. The result? Improved productivity, high availability, and more confident operators. By hauling more every load, every cycle and every shift, it creates a low-cost-per-ton hauling operation that delivers a better bottom line.

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.

Standard Equipment

POWER TRAIN
  • Cat® C175-16 Diesel Engine: 2610 kW (3,500 hp) Fuel Optimized , U.S. EPA Tier 2 equivalent (available for applicable markets)
  • Cat® C175-16 Diesel Engine: 2610 kW (3,500 hp) U.S. EPA Tier 4 Final / EU Stage V (available for applicable markets)
  • C175-16 Diesel Engine
    – Turbocharging (4) / Aftercooled (ATAAC)
    – Centrifugal oil filter
    – Self-cleaning oil filter
    – Charging Alternator (225 amp), brushless
    – Pre-lubrication/engine
    – Air cleaner with precleaner (4)
    – Multi-point oil pressure sensing
    – Exhaust - Muffler, Right Side Exit
  • Cat C175-20 Diesel Engine (High Altitude Only)
    - 3095 kW (4,150 hp) Fuel Optimized (available for applicable markets)
    - Centrifugal oil filter
    - Self-cleaning oil filter
    - Charging Alternator (225 amp), brushless
    - Pre-lubrication/engine
    - Air cleaner with precleaner (4)
    - Multi-point oil pressure sensing
    - Exhaust - Muffler, Right Side Exit
  • Braking system:
    – Electric dynamic retarding with blended low speed
    – Oil-cooled, Multi-disc (front and rear) - Service, Parking, Secondary
    – Load Brake (rear axle only)
    – Extended Life Brake Disc Material
    – Automatic Retarder Control (ARC)
    – Brake Release Motor (towing)
  • Cat® AC Drivetrain:
    – AC generator
    – AC induction motors (high-torque)
    – IGBT motor control
    – Radial retarding grid with AC motor control
    – Programmable top speed
    – TorqueBoost technology
    – Traction control system
  • Directional Shift Management:
    – Body-up reverse neutralizer
    – Body-up shift inhibitor
    – Reverse shift inhibitor
    – Neutral coast inhibitor
    – Neutral start inhibitor
  • Additional Features:
    – Rear axle continuous lubrication and filtration
    – Rear axle continuous oil cooling
OPERATION AND CONTROLS
  • Integrated ROPS/FOPS cab, insulated/sound suppressed
  • Seat, operator, air suspension, adjustable, heated/cooled
  • Seatbelt, operator, three point
  • Seat, trainer, air suspension, adjustable
  • Seatbelt, trainer, two point
  • Steering wheel, tilt, telescopic, horn
  • Horn, electric
  • Directional shift lever
  • Single Pedal Retarding & oil-cooled brake control
  • Automatic Retard Control (ARC) toggle switch
  • Load brake switch
  • Windshield with tinted/safety glass
  • Window, electric powered, operator/passenger
  • Windshield Wipers (2), intermittent control and washer
  • Visor (2)
  • Storage rear of seats
  • Cup holder (2)
  • Dome courtesy light
  • Entertainment radio ready with speakers and wiring harnesses
  • Converter, 12V
  • 12V DC power supply (1)
  • Mirrors, standard (Left-Flat, Right-Convex)
  • Fixed access ladder, left hand ground access
  • Fixed access ladder, right hand round access (High Altitude Only)
  • HVAC:
    – Pressurized, filtered environment
    – Air conditioner
    – Heater/defroster
  • Metric or English gauges:
    – Speedometer
    – Tachometer
    – Electric hour meter
    – Fuel level
    – DEF level (U.S. EPA Tier 4 Final / EU Stage V engines only)
    – Hydraulic oil temperature
    – Engine coolant temperature
  • Service & Information:
    – Diagnostic connection port
    – Electric engine control fault indicator
    – Alarm, Park brake / open operator door
    – Third party telematics port
    – VIMS message center advisor
ELECTRICAL
  • Audible Alarm, backup
  • Electrical system, 24V with fuses and breakers
  • Batteries, 12V (8) 90 amp hour
  • Ground level Battery charge receptacle
  • Lighting, signals/service:
    – Headlights (4 low beam, 4 high beam), LED
    – Headlights (4 low beam, 2 high beam), LED (High Altitude only)
    – Backup and marker/hazard, LED
    – Directional signals (front and rear), LED
    – Front stair access/service deck, LED
    – Stop/tail lights, LED
    – Engine compartment, LED
    – Inverter energy warning lights, LED
  • Payload indicator, red/green
  • Payload, digital display
ADDITIONAL FEATURES AND EQUIPMENT
  • Accumulators (Steering & Brake) – Australian and Canadian certified
  • Automatic lubrication system
  • Rotating component guards
  • Mud Flaps
  • Tow hooks and pins (front)
  • Tow pin (rear) (empty truck only)
  • 44 x 63 rims, six position (6)
  • Fueling:
    – 4922 L (1,300 gal) fuel tank (Fuel optimized engines only)
    – 4543 L (1,200 gal) fuel tank (U.S. EPA Tier 4 Final / EU Stage V engines only)
    – 379 L (100 gallon) DEF tank (U.S. EPA Tier 4 Final / EU Stage V engines only)
    – Fuel filter with water separator
    – 210 GPM Fast fill fuel system (Left and Right)
  • Service:
    – Engine service platforms (2)
    – ANSI or ISO service instructions
    – S•O•S℠ sample points (hydraulic oil, engine coolant, engine oil)
    – Ground level machine lockout (battery)
    – Ground level engine shut-down
    – Drivetrain lockout
    – Drivetrain lockout at ground level (High Altitude only)
    – Engine start lockout
    – Auxiliary "buddy" dumping quick connect
    – Auxiliary steering quick connect (towing)
CAT® TECHNOLOGY PRODUCTS
  • Cat® MineStar™ Detect (Radar and Camera) System
  • Cat® Product Link™ Elite (Cellular)
DUMP BODY
  • High Efficiency (HE) body, 218-276 m³ (285-361 yd³)
    – HE Body Mounting Group
    – Rock ejectors (chain)
ANTIFREEZE
  • Cat Extended Life Coolant (ELC) protects to –35° C (–30° F)

Additional information

Offering Type

Engine - Gross Power - SAE J1995

2610 kW ( 3500 HP )

Engine Model

Cat® C175-16

Engine - Net Power - SAE J1349

2539 kW ( 3405 HP )

Engine - Optional Gross Power - SAE J1995

2312 kW ( 3100 HP )

Engine - Rated Speed

1800 r/min ( 1800 r/min )

Engine - Emissions Rating

Fuel Optimized

Engine - Bore

175 mm ( 6.9 in )

Engine - Stroke

220 mm ( 8.7 in )

Engine - Displacement

85 l ( 5187 in³ )

Weights - Approximate - Rated Gross Machine Weight

623690 kg ( 1375000 lb )

Weights - Approximate - Chassis Weight

205852 kg ( 453826 lb )

Weights - Approximate - Body Weight Range

38 833 – 43 275 kg (85,611 – 95,406 lb)

Weights - Approximate - Note (1)

Consult your tire manufacturer for maximum tire load.

Weights - Approximate - Note (2)

Chassis weight with 100% fuel, hoist, body mounting group, rims, and tires.

Weights - Approximate - Note (3)

Body weight varies depending on how body is equipped.

Weights - Approximate - Nominal Rated Payload

372 t ( 410 ton (US) )

Weight Distributions - Approximate - Front Axle - Empty

47 % ( 47 % )

Weight Distributions - Approximate - Rear Axle - Empty

53 % ( 53 % )

Weight Distributions - Approximate - Front Axle - Loaded

33 % ( 33 % )

Weight Distributions - Approximate - Rear Axle - Loaded

67 % ( 67 % )

Weight Distributions - Approximate - Note

Weight distributions optimized with Cat body.

AC Drive System - Total Reduction Ratio

35:01:00

AC Drive System - Top Speed - Loaded

64 km/h ( 40 mile/h )

AC Drive System - Generator/Alternator

Brushless, engine mounted, dual bearing

AC Drive System - Controls

IGBT Inverter Technology, air cooled, pressurized cabinet with filtration

AC Drive System - Wheel Motor

Cat high-torque AC induction, rear axle mounted

AC Drive System - Cooling System

Cat variable speed, hydraulically driven cooling system

Tires - Rims

44" x 63" Rims

Standard Tires

59/80 R63

Tires - Note (1)

Quick Change Rims optional.

Tires - Note (2)

Caterpillar recommends the customer evaluate all job conditions and consult tire manufacturer for proper tire selection and TKPH (TMPH) capabilities.

Braking System - Service Brakes

Four-Corner, Wet Disc, Oil Cooled, Hydraulically Actuated

Braking System - Front Wet Disc Brake Surface Area

146081 cm² ( 22642 in² )

Braking System - Rear - Wet Disc Brake Surface Area

211163 cm² ( 32730 in² )

Braking System - Standards

Service and Secondary: ISO 3450:2011

Braking System - Dynamic Retarding Power - Continuous

4086 kW ( 5480 HP )

Braking System - Parking Brakes

Four-corner, Multi-disc, Spring Applied, Hydraulically Released

Braking System - Load Brake

Rear service brakes

Braking System - Note

Anti-Lock Brake System (ABS) optional with CMD package

Capacity - HE Body - 100% fill factor - Struck

129-200 m³ (168-261 yd³)

Capacity - HE Body - 100% fill factor - Heaped (SAE 2:1)

218-276 m³ (285-361 yd³)

Capacity - HE Body - 100% fill factor - Note

Contact your local Cat dealer for body recommendations.

Body Hoists - Type

Twin, two-stage hydraulic cylinders with snubbing valve.

Body Hoists - Pump Flow - High Idle

964 l/min ( 257.3 gal/min )

Body Hoists - Relief Valve Setting - Raise

20884 kPa ( 3029 psi )

Body Hoists - Body Raise Time - High Idle

21 s ( 21 s )

Body Hoists - Body Lower Time - Float

22 s ( 22 s )

Body Hoists - Body Power Down- High Idle

17.5 s ( 17.5 s )

Body Hoists - Note (1)

Twin, two-stage hydraulic cylinders mounted outside main frame; double-acting cylinders in both stages.

Body Hoists - Note (2)

Power raise in both stages; power down capability in both stages.

Body Hoists - Note (3)

Automatic body-lower modulation reduces impact on frame.

Suspension - Effective Cylinder Stroke - Front

254 mm ( 10 in )

Suspension - Effective Cylinder Stroke - Rear

133.35 mm ( 5 in )

Service Refill Capacities - Fuel Tank

4922 l ( 1300 gal (US) )

Service Refill Capacities - Fuel Tank (Tier 4)

4542 l ( 1200 gal (US) )

Service Refill Capacities - Diesel Exhaust Fluid Tank

379 l ( 100 gal (US) )

Service Refill Capacities - Cooling System

799 l ( 211 gal (US) )

Service Refill Capacities - Crankcase

310 l ( 82 gal (US) )

Service Refill Capacities - Final Drive - Each

254 l ( 67 gal (US) )

Service Refill Capacities - Hydraulic System - Including Tank

1458 l ( 385 gal (US) )

Service Refill Capacities - Hydraulic Tank

1121 l ( 296 gal (US) )

Service Refill Capacities - Grease Tank

41 kg ( 90 lb )

Service Refill Capacities - Note (1)

DEF Tank only available for U.S. EPA Tier 4 Final / EU Stage V engine option

Cab - Air Conditioning

HFC – 134A refrigerant: 21,600 Btu/h

Cab - Heater / Defroster

24600 Btu/h ( 24600 Btu/h )

Cab - Note

Ambient capabilities down to -15C (5F) for heater/defroster and up to 50C (122F) for air conditioning.

Cab - ROPS Standards (1)

ROPS (Rollover Protective Structure) meets ISO 3471:2008 for Operator and ISO 13459:2012 for Trainer.

Cab - FOPS Standards

FOPS (Falling Objects Protective Structure) meets ISO 3449:2005 Level II for Operator and ISO 13459:2012 Level II for Trainer.

Sound Standards

The operator sound pressure level, 75 dB(A), measured according to ISO 6394:2008 and ISO 6396:2008.

Steering - Steer Angle

39 ° ( 39 ° )

Steering - Turning Diameter - Front

32.4 m ( 106.3 ft )

Steering Standards

Steering Standards: ISO 5010:2007

Steering - Note

Turning Diameter (ISO 7457:1997)

Dimensions (Approximate) - Height - Top of ROPS

6720 mm ( 22.1 ft )

Dimensions (Approximate) - Overall Length

15679 mm ( 51.44 ft )

Dimensions (Approximate) - Wheel Base

6674 mm ( 21.9 ft )

Dimensions (Approximate) - Rear Axle - Tail

4898 mm ( 16.07 ft )

Dimensions (Approximate) - Dump Clearance - Empty

1744 mm ( 5.72 ft )

Dimensions (Approximate) - Loading Height - Empty

7784 mm ( 25.54 ft )

Dimensions (Approximate) - Overall Height - Body Raised

14890 mm ( 48.85 ft )

Dimensions (Approximate) - Centerline Front Tire Width

7028 mm ( 23.06 ft )

Dimensions (Approximate) - Front Axle Clearance - Loaded

855 mm ( 2.81 ft )

Dimensions (Approximate) - Overall Canopy Width (with rock deflectors)

10103 mm ( 33.15 ft )

Dimensions (Approximate) - Outside Body/Canopy Width (without rock deflectors)

9639 mm ( 31.62 ft )

Dimensions (Approximate) - Inside Body Width

8973 mm ( 29.44 ft )

Dimensions (Approximate) - Front Canopy Height - Empty

7928 mm ( 26.01 ft )

Dimensions (Approximate) - Rear Axle Clearance - Loaded

854 mm ( 2.8 ft )

Dimensions (Approximate) - Centerline of Rear Dual Tire Width

5943 mm ( 19.5 ft )

Dimensions (Approximate) - Overall Tire Width - Empty

9226 mm ( 30.27 ft )

Dimensions (Approximate) - Note

Dimensions listed includes canopy deflectors

Engine - 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.

Engine - Note (2)

U.S. EPA Tier 4 Final / EU Stage V available for applicable markets.

Engine - Note (3)

Additional fuel optimized selectable power ratings: 2312 kW / 3,100 hp

Engine - High Altitude Only - 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.

Engine - High Altitude Only - Note 2

Additional fuel optimized selectable power rating: 2983 kW / 4,000 hp

Engine - High Altitude Only - Bore

175 mm ( 6.9 in )

Service Refill Capacities - High Altitude Only - Crankcase

471 l ( 124 gal (US) )

Service Refill Capacities - High Altitude Only - Hydraulic Tank

1032 l ( 273 gal (US) )

Engine - High Altitude Only - Engine Model

Cat® C175-20

Braking System - Electric Retarding

Radial Grid Design

Engine - High Altitude Only - Emissions Rating

Fuel Optimized

Service Refill Capacities - High Altitude Only - Fuel Tank

7571 l ( 2000 gal (US) )

Engine - High Altitude Only - Gross Power SAE J1995:2014

3095 kW ( 4150 HP )

Service Refill Capacities - High Altitude Only - Hydraulic System (includes tank)

1296 l ( 342 gal (US) )

Engine - High Altitude Only - Stroke

220 mm ( 8.7 in )

Service Refill Capacities - High Altitude Only - Cooling System

1032 l ( 273 gal (US) )

Engine - High Altitude Only - Displacement

106 l ( 6469 in³ )

Dimensions (Approximate) - Overall Length (High Altitude only)

15810 mm ( 51.87 ft )

Engine - High Altitude Only - Net Power - SAE J1349:2011

2983 kW ( 4000 HP )

Engine - High Altitude Only - Rated Speed

1750 r/min ( 1750 r/min )

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