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798 AC Electric Drive Mining Truck

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Overview

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.

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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.

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.

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.

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.

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.

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.

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%.

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.

Engine

Engine Model: Cat® C175-16
Gross Power - SAE J1995: 3500hp
Standard Gross Power - SAE J1995: 3500HP
Optional Gross Power - SAE J1995: 3100hp
Rated Speed: 1800r/min
Net Power - SAE J1349: 3405hp
Emissions Rating: Fuel Optimized
Stroke: 8.7in
Displacement: 5187in³
Bore: 6.9in
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.
Note (2): U.S. EPA Tier 4 Final / EU Stage V available for applicable markets.
Note (3): Additional fuel optimized selectable power ratings: 2312 kW / 3,100 hp

Weights - Approximate

Rated Gross Machine Weight: 1375000lb
Chassis Weight: 453826lb
Body Weight Range: 38 833 - 43 275 kg (85,611 - 95,406 lb)
Note (1): Consult your tire manufacturer for maximum tire load.
Note (2): Chassis weight with 100% fuel, hoist, body mounting group, rims, and tires.
Note (3): Body weight varies depending on how body is equipped.
Nominal Rated Payload: 410ton (US)

Operating Specifications

Top Speed - Loaded: 40mile/h
Steer Angle: 39°
Minimum Turning Radius: 53ft
Note (1): Payload assumes no debris, no extra options or attachments.
Note (2): Refer to the Cat Mining Truck 10/10/20 Overload Policy (AEXQ0250) for maximum gross machine weight limitations.

Final Drives

Total Reduction Ratio: 35:1

AC Drive System

Generator/Alternator: Brushless, engine mounted, dual bearing
Controls: IGBT Inverter Technology, air cooled, pressurized cabinet with filtration
Wheel Motor: Cat high-torque AC induction, rear axle mounted
Cooling System: Cat variable speed, hydraulically driven cooling system
Total Reduction Ratio: 35:01:00
Top Speed - Loaded: 40mile/h

Tires

Standard Tires: 59/80 R63
Note (1): Quick Change Rims optional.
Note (2): Caterpillar recommends the customer evaluate all job conditions and consult tire manufacturer for proper tire selection and TKPH (TMPH) capabilities.
Rims: 44" x 63" Rims

Body Hoists

Type: Twin, two-stage hydraulic cylinders with snubbing valve.
Pump Flow - High Idle: 257.3gal/min
Relief Valve Setting - Raise: 3029psi
Body Raise Time - High Idle: 21s
Body Lower Time - Float: 22s
Body Power Down- High Idle: 17.5s
Note (1): Twin, two-stage hydraulic cylinders mounted outside main frame; double-acting cylinders in both stages.
Note (2): Power raise in both stages; power down capability in both stages.
Note (3): Automatic body-lower modulation reduces impact on frame.

Braking System

Front Wet Disc Brake Surface Area: 22642in²
Rear - Wet Disc Brake Surface Area: 32730in²
Standards: Service and Secondary: ISO 3450:2011
Electric Retarding: Radial Grid Design
Dynamic Retarding Power - Continuous: 5480hp
Service Brakes: Four-Corner, Wet Disc, Oil Cooled, Hydraulically Actuated
Parking Brakes: Four-corner, Multi-disc, Spring Applied, Hydraulically Released
Load Brake: Rear service brakes
Note: Anti-Lock Brake System (ABS) optional with CMD package

Weight Distributions - Approximate

Front Axle - Empty: 47%
Rear Axle - Empty: 53%
Front Axle - Loaded: 33%
Rear Axle - Loaded: 67%
Note: Weight distributions optimized with Cat body.

Capacity - HE Body - 100% fill factor

Struck: 129-200 m³ (168-261 yd³)
Heaped (SAE 2:1): 218-276 m³ (285-361 yd³)
Dump Body Plate Thickness Varies Depending on Body Selection - Floor Plate: 1in
Dump Body Plate Thickness Varies Depending on Body Selection - Front Plate: 0.5in
Dump Body Plate Thickness Varies Depending on Body Selection - Side Plate: 0.38in
Dump Body Plate Thickness Varies Depending on Body Selection - Canopy Plate: 0.2in
Note: Contact your local Cat dealer for body recommendations.

Service Refill Capacities

Cooling System: 211gal (US)
Crankcase: 82gal (US)
Final Drive - Each: 67gal (US)
Hydraulic Tank: 296gal (US)
Hydraulic System - Including Tank: 385gal (US)
Fuel Tank: 1300gal (US)
Fuel Tank (Tier 4): 1200gal (US)
Diesel Exhaust Fluid Tank: 100gal (US)
Grease Tank: 90lb
Note (1): DEF Tank only available for U.S. EPA Tier 4 Final / EU Stage V engine option

ROPS

ROPS Standards: ROPS (Rollover Protective Structure) cab offered by Caterpillar meets ISO 3471:2008 for Operator and ISO 13459:2012 for Trainer.
FOPS Standards: FOPS (Falling Objects Protective Structure) meets ISO 3449:2005 for Operator and ISO 13459:2012 Level II FOPS criteria for Trainer.

Sound

Sound Standards (1): The operator sound pressure level measured according to work cycle procedures specified in ISO 6394:2008 and ISO 6396:2008 is 75 dB(A) for cab offered by Caterpillar when properly installed, maintained, and tested with doors and windows closed.
Sound Standards (2): Hearing protection may be needed when operating with an open operator station and cab (when not properly maintained or doors/windows open) for extended periods or in a noisy environment.
Sound Standards: The operator sound pressure level, 75 dB(A), measured according to ISO 6394:2008 and ISO 6396:2008.

Steering

Steering Standards: Steering Standards: ISO 5010:2007
Note: Turning Diameter (ISO 7457:1997)
Steer Angle: 39°
Turning Diameter - Front: 106.3ft

Dimensions (Approximate)

Height - Top of ROPS: 22.1ft
Overall Length: 51.44ft
Wheel Base: 21.9ft
Rear Axle - Tail: 16.07ft
Ground Clearance: 3.37ft
Dump Clearance: 5.72ft
Loading Height - Empty: 25.54ft
Overall Height - Body Raised: 48.85ft
Centerline Front Tire Width: 23.06ft
Front Axle Clearance: 2.81ft
Canopy Width (without optional rock deflectors): 31.62ft
Outside Body Width: 31.62ft
Inside Body Width: 29.44ft
Front Canopy Height: 26.01ft
Rear Axle - Clearance: 2.8ft
Centerline of Rear Dual Tire Width: 19.5ft
Overall Tire Width: 30.27ft
Dump Clearance - Empty: 5.72ft
Front Axle Clearance - Loaded: 2.81ft
Overall Canopy Width (with rock deflectors): 33.15ft
Outside Body/Canopy Width (without rock deflectors): 31.62ft
Front Canopy Height - Empty: 26.01ft
Rear Axle Clearance - Loaded: 2.8ft
Overall Tire Width - Empty: 30.27ft
Note: Dimensions listed includes canopy deflectors
Overall Length (High Altitude only): 51.87ft

Cab

Air Conditioning: HFC - 134A refrigerant: 21,600 Btu/h
Heater / Defroster: 24600Btu/h
Note: Ambient capabilities down to -15C (5F) for heater/defroster and up to 50C (122F) for air conditioning.
ROPS Standards (1): ROPS (Rollover Protective Structure) meets ISO 3471:2008 for Operator and ISO 13459:2012 for Trainer.
ROPS Standards (2): ROPS (Rollover Protective Structure) meets ISO 3471:2008 for Operator and ISO 13459:2012 for Trainer.
FOPS Standards: FOPS (Falling Objects Protective Structure) meets ISO 3449:2005 Level II for Operator and ISO 13459:2012 Level II for Trainer.

Suspension

Type: Self-contained nitrogen/oil cylinders, pin-to-pin mounting, top & bottom double shear clevis attachments
Effective Cylinder Stroke - Front: 10in
Effective Cylinder Stroke - Rear: 5in
Rear axle - Oscillation: +/- 5.32 degrees

Engine - High Altitude Only

Engine Model: Cat® C175-20
Gross Power SAE J1995:2014: 4150hp
Net Power - SAE J1349:2011: 4000hp
Rated Speed: 1750r/min
Emissions Rating: Fuel Optimized
Bore: 6.9in
Stroke: 8.7in
Displacement: 6469in³
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.
Note 2: Additional fuel optimized selectable power rating: 2983 kW / 4,000 hp

Service Refill Capacities - High Altitude Only

Fuel Tank: 2000gal (US)
Cooling System: 273gal (US)
Crankcase: 124gal (US)
Hydraulic Tank: 273gal (US)
Hydraulic System (includes tank): 342gal (US)

Standard/Optional Features

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
  – SOS℠ 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)

Optional Equipment:

Power Train
- Cat^® C175-16 Diesel Engine: 2312 kW (3,100 hp) power setting (Fuel optimized / U.S. EPA Tier 2 equiv. engines only)
- Cat C175-20 Diesel Engine (High Alititude only): 2983 kW (4,000 hp) power setting, Fuel Optimized (available for applicable markets)
- Body heat exhaust
Operation And Controls
- Throttle lock
- Timer, engine shutdown
- Heated mirrors (Left and Right)
- Powered access ladder, left hand ground access
- Language monitors: English, Spanish, Italian, Portuguese, Dutch, Norwegian, Swedish, Estonian, Latin, Lithuanian, Slovakian, Slovenian, Greek, Romanian, Russian, Polish, Czech, Hungarian, Icelandic, Finnish, Danish, Thai, Indonesian, Vietnam, Malaysian, Chinese
Operations And Controls
- Powered access ladder, right hand ground access (High Altitude only)
Electrical
- Lighting, signals/service:
  – Fog lights, LED
  – Work lights, LED
  – Side profile lights, LED
  – Dump body marker/stop lights, LED
- Retarding indicator light, multi-color, cab exterior
- Payload, digital display
Additional Features And Equipment
- Fueling: 300 GPM Fast fill fuel system (Left and Right)
- Portable fire extinguisher
- Front bumper single-point center tow
- Wheel chocks (ANSI and ISO)
- 44 x 63 rims, quick change (2 quick change, 4 standard)
- Service:
  – Inverter platform (rear access)
  – Service Center, fast-fill
Cat^® Technology Products
- Cat^® MineStar^™ Detect (Camera Only) System
- Cat^® Product Link^™ Elite (Satellite)
- Cat^® MineStar^™ Health
- Cat^® MineStar^™ Fleet
- Cat^® MineStar^™ Terrain
- Cat^® MineStar^™ Command-Ready
- Cat^® MineStar^™ Command
- Cat^® Trolley Assist Attachment
Dump Body
- HE rock box liner
- HE canopy rock deflectors
- HE rear tire rock deflectors
- HE impact liner
- Chain and solid bar
- Canopy Extension
Antifreeze
- Antifreeze/coolant protects to –50° C (–58° F)