798 AC

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Specifications

AC Drive System

Total Reduction Ratio

35:01:00
Top Speed - Loaded

40 mile/h 64 km/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

Body Hoists

Type

Twin, two-stage hydraulic cylinders with snubbing valve.
Pump Flow - High Idle

257.3 gal/min 964 l/min
Relief Valve Setting - Raise

3029 psi 20884 kPa
Body Raise Time - High Idle

21 s 21 s
Body Lower Time - Float

22 s 22 s
Body Power Down- High Idle

17.5 s 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.

Braking System

Service Brakes

Four-Corner, Wet Disc, Oil Cooled, Hydraulically Actuated
Front Wet Disc Brake Surface Area

22642 in² 146081 cm²
Rear - Wet Disc Brake Surface Area

32730 in² 211163 cm²
Standards

Service and Secondary: ISO 3450:2011
Electric Retarding

Radial Grid Design
Dynamic Retarding Power - Continuous

5480 hp 4086 kW
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

Cab

Air Conditioning

HFC - 134A refrigerant: 21,600 Btu/h
Heater / Defroster

24600 Btu/h 24600 Btu/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.
FOPS Standards

FOPS (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

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.

Dimensions (Approximate)

Height - Top of ROPS

22.1 ft 6720 mm
Overall Length

51.44 ft 15679 mm
Wheel Base

21.9 ft 6674 mm
Rear Axle - Tail

16.07 ft 4898 mm
Dump Clearance - Empty

5.72 ft 1744 mm
Loading Height - Empty

25.54 ft 7784 mm
Overall Height - Body Raised

48.85 ft 14890 mm
Centerline Front Tire Width

23.06 ft 7028 mm
Front Axle Clearance - Loaded

2.81 ft 855 mm
Overall Canopy Width (with rock deflectors)

33.15 ft 10103 mm
Outside Body/Canopy Width (without rock deflectors)

31.62 ft 9639 mm
Inside Body Width

29.44 ft 8973 mm
Front Canopy Height - Empty

26.01 ft 7928 mm
Rear Axle Clearance - Loaded

2.8 ft 854 mm
Centerline of Rear Dual Tire Width

19.5 ft 5943 mm
Overall Tire Width - Empty

30.27 ft 9226 mm
Overall Length (High Altitude only)

51.87 ft 15810 mm
Note

Dimensions listed includes canopy deflectors

Engine

Gross Power - SAE J1995

3500 hp 2610 kW
Engine Model

Cat® C175-16
Net Power - SAE J1349

3405 hp 2539 kW
Optional Gross Power - SAE J1995

3100 hp 2312 kW
Rated Speed

1800 r/min 1800 r/min
Emissions Rating

Fuel Optimized
Bore

6.9 in 175 mm
Stroke

8.7 in 220 mm
Displacement

5187 in³ 85 l
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

Engine - High Altitude Only

Engine Model

Cat® C175-20
Gross Power SAE J1995:2014

4150 hp 3095 kW
Net Power - SAE J1349:2011

4000 hp 2983 kW
Rated Speed

1750 r/min 1750 r/min
Emissions Rating

Fuel Optimized
Bore

6.9 in 175 mm
Stroke

8.7 in 220 mm
Displacement

6469 in³ 106 l
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

Fuel Tank

1300 gal (US) 4922 l
Fuel Tank (Tier 4)

1200 gal (US) 4542 l
Diesel Exhaust Fluid Tank

100 gal (US) 379 l
Cooling System

211 gal (US) 799 l
Crankcase

82 gal (US) 310 l
Final Drive - Each

67 gal (US) 254 l
Hydraulic System - Including Tank

385 gal (US) 1458 l
Hydraulic Tank

296 gal (US) 1121 l
Grease Tank

90 lb 41 kg
Note (1)

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

Service Refill Capacities - High Altitude Only

Fuel Tank

2000 gal (US) 7571 l
Cooling System

273 gal (US) 1032 l
Crankcase

124 gal (US) 471 l
Hydraulic Tank

273 gal (US) 1032 l
Hydraulic System (includes tank)

342 gal (US) 1296 l

Sound

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 °
Turning Diameter - Front

106.3 ft 32.4 m
Steering Standards

ISO 5010:2019
Note

Turning Diameter (ISO 7457:1997)

Suspension

Type

Self-contained nitrogen/oil cylinders, pin-to-pin mounting, top & bottom double shear clevis attachments
Effective Cylinder Stroke - Front

10 in 254 mm
Effective Cylinder Stroke - Rear

5 in 133.35 mm

Tires

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.

Weight Distributions - Approximate

Front Axle - Empty

47 % 47 %
Rear Axle - Empty

53 % 53 %
Front Axle - Loaded

33 % 33 %
Rear Axle - Loaded

67 % 67 %
Note

Weight distributions optimized with Cat body.

Weights - Approximate

Nominal Rated Payload

410 ton (US) 372 t
Rated Gross Machine Weight

1375000 lb 623690 kg
Chassis Weight

453826 lb 205852 kg
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.

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