798 AC
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.
Gross Power - SAE J1995
3500 HP
Engine Model
Cat® C175-16
Net Power - SAE J1349
3405 HP
Specification
Value
Gross Power - SAE J1995
3500 HP
Engine Model
Cat® C175-16
Net Power - SAE J1349
3405 HP
Optional Gross Power - SAE J1995
3100 HP
Rated Speed
1800 r/min
Emissions Rating
Fuel Optimized
Bore
6.9 in
Stroke
8.7 in
Displacement
5187 in³
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
Specification
Value
Engine Model
Cat® C175-20
Gross Power SAE J1995:2014
4150 HP
Net Power - SAE J1349:2011
4000 HP
Rated Speed
1750 r/min
Emissions Rating
Fuel Optimized
Bore
6.9 in
Stroke
8.7 in
Displacement
6469 in³
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
Specification
Value
Rated Gross Machine Weight
1375000 lb
Chassis Weight
453826 lb
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
410 ton (US)
Specification
Value
Front Axle - Empty
47 %
Rear Axle - Empty
53 %
Front Axle - Loaded
33 %
Rear Axle - Loaded
67 %
Note
Weight distributions optimized with Cat body.
Specification
Value
Total Reduction Ratio
35:01:00
Top Speed - Loaded
40 mile/h
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
Specification
Value
Rims
44" x 63" Rims
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.
Specification
Value
Service Brakes
Four-Corner, Wet Disc, Oil Cooled, Hydraulically Actuated
Front Wet Disc Brake Surface Area
22642 in²
Rear - Wet Disc Brake Surface Area
32730 in²
Standards
Service and Secondary: ISO 3450:2011
Electric Retarding
Radial Grid Design
Dynamic Retarding Power - Continuous
5480 HP
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
Specification
Value
Struck
129-200 m³ (168-261 yd³)
Heaped (SAE 2:1)
218-276 m³ (285-361 yd³)
Note
Contact your local Cat dealer for body recommendations.
Specification
Value
Type
Twin, two-stage hydraulic cylinders with snubbing valve.
Pump Flow - High Idle
257.3 gal/min
Relief Valve Setting - Raise
3029 psi
Body Raise Time - High Idle
21 s
Body Lower Time - Float
22 s
Body Power Down- High Idle
17.5 s
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.
Specification
Value
Type
Self-contained nitrogen/oil cylinders, pin-to-pin mounting, top & bottom double shear clevis attachments
Effective Cylinder Stroke - Front
10 in
Effective Cylinder Stroke - Rear
5 in
Specification
Value
Fuel Tank
1300 gal (US)
Fuel Tank (Tier 4)
1200 gal (US)
Diesel Exhaust Fluid Tank
100 gal (US)
Cooling System
211 gal (US)
Crankcase
82 gal (US)
Final Drive - Each
67 gal (US)
Hydraulic System - Including Tank
385 gal (US)
Hydraulic Tank
296 gal (US)
Grease Tank
90 lb
Note (1)
DEF Tank only available for U.S. EPA Tier 4 Final / EU Stage V engine option
Specification
Value
Fuel Tank
2000 gal (US)
Cooling System
273 gal (US)
Crankcase
124 gal (US)
Hydraulic Tank
273 gal (US)
Hydraulic System (includes tank)
342 gal (US)
Specification
Value
Air Conditioning
HFC - 134A refrigerant: 21,600 Btu/h
Heater / Defroster
24600 Btu/h
Note
Ambient capabilities down to -15C (5F) for heater/defroster and up to 50C (122F) for air conditioning.
ROPS Standards (1)
The operator sound pressure level, 75 dB(A), measured according to ISO 6394:2008 and ISO 6396:2008.
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.
Specification
Value
Steer Angle
39 °
Turning Diameter - Front
106.3 ft
Steering Standards
Steering Standards: ISO 5010:2007
Note
Turning Diameter (ISO 7457:1997)
Specification
Value
Height - Top of ROPS
22.1 ft
Overall Length
51.44 ft
Wheel Base
21.9 ft
Rear Axle - Tail
16.07 ft
Dump Clearance - Empty
5.72 ft
Loading Height - Empty
25.54 ft
Overall Height - Body Raised
48.85 ft
Centerline Front Tire Width
23.06 ft
Front Axle Clearance - Loaded
2.81 ft
Overall Canopy Width (with rock deflectors)
33.15 ft
Outside Body/Canopy Width (without rock deflectors)
31.62 ft
Inside Body Width
29.44 ft
Front Canopy Height - Empty
26.01 ft
Rear Axle Clearance - Loaded
2.8 ft
Centerline of Rear Dual Tire Width
19.5 ft
Overall Tire Width - Empty
30.27 ft
Overall Length (High Altitude only)
51.87 ft
Note
Dimensions listed includes canopy deflectors
- 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.
- 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.
- 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.
- 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).
- 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.
- 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.
- 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.
- 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.
- 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.
