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794 AC Mining Truck

The Cat® 794 AC electric drive truck delivers a full 327-ton (297-tonne) payload, increased speed on grade, 34% more retarding power than competitive trucks, superior braking performance and easier maintenance. The result? High availability, more confident operators and improved productivity. The 794 features a proven electric drive powertrain that is Caterpillar designed, integrated and supported. Validated on sites around the world, the 794 has proven its performance in a variety of applications. It hauls more every load, every cycle and every shift. And it delivers a better bottom line to the most important mine in the world: yours.

Weights - Approximate

Nominal Rated Payload

327ton (US)

Rated Gross Machine Weight


Chassis Weight


Body Weight


Note (1)

Consult your tire manufacturer for maximum tire load.

Note (2)

Chassis weight with full fuel and fluids, standard & mandatory attachments, hoist, body mounting group, rims, and tires

Note (3)

Refer to Cat Mining Truck 10/10/20 Overload Policy (AEXQ0250) for maximum gross machine weight limitations.

Note (4)

Tier 4 Final / Stage V chassis weight: 426312 lb (193372 kg)


Gross Power - SAE J1995


Standard Gross Power - SAE J1995


Engine Model

Cat® C175-16

Optional Gross Power - SAE J1995


Optional Gross Power - SAE J1995 (Option 2)


Rated Speed


Net Power - SAE J1349


Emissions Rating

Fuel Optimized







Note (1)

Contact factory for high altitude configuration.

Note (2)

Tier 4 / EU Stage V option available for regions that require these emissions standards.

Note (3)

Tier 4 / EU Stage V engine option Net Power - SAE J1349: 3434 HP (2561 kW)

Final Drives

Total Reduction Ratio



Standard Tires

53/80 R63


36" x 63"

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.

AC Drive System

Total Reduction Ratio


Top Speed - Loaded



Brushless, engine mounted, dual bearing


IGBT Inverter Technology, air cooled, pressurized cabinet with filtration

Wheel Motor

High-torque AC induction, rear axle mounted

Cooling System

Variable speed, hydraulically driven cooling system

Braking System

Service Brakes

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

Front Wet Disc Brake Surface Area


Rear - Wet Disc Brake Surface Area



ISO 3450:2011

Parking Brake

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

Load Brake

Rear service brakes

Dynamic Retarding Power - Continuous


Weight Distributions - Approximate

Front Axle - Empty


Rear Axle - Empty


Front Axle - Loaded


Rear Axle - Loaded


Body Hoists

Pump Flow - High Idle (HAA at 1,800 rpm)


Pump Flow - High Idle (LAA at 1,960 rpm)


Relief Valve Setting - Raise


Body Raise Time - High Idle


High Idle Body Lower Time - Float


Total Cycle Time


Note (1)

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

Note (2)

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

Note (3)

Automatic body-lower modulation reduces impact on frame.

Capacity - HE Body - 100% fill factor


108-133 m³ (142-175 yd³)

Heaped (SAE 2:1)

180-222 m³ (236-290 yd³)

Dump Body Plate Thickness Varies Depending on Body Selection - Floor Plate


Dump Body Plate Thickness Varies Depending on Body Selection - Front Plate


Dump Body Plate Thickness Varies Depending on Body Selection - Side Plate


Dump Body Plate Thickness Varies Depending on Body Selection - Canopy Plate



Contact your local Cat dealer for body recommendations.

Service Refill Capacities

Fuel Tank

1300gal (US)

Cooling System

211gal (US)


82gal (US)

Final Drive - Each

67gal (US)

Hydraulic Tank

296gal (US)

Hydraulic System - Including Tank

385gal (US)

Diesel Exhaust Fluid Tank

100gal (US)

Note (1)

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

Dimensions (Approximate)

Height - Top of ROPS


Overall Length


Wheel Base


Rear Axle - Tail


Ground Clearance


Dump Clearance


Loading Height - Empty


Overall Height - Body Raised


Centerline Front Tire Width


Front Axle Clearance


Canopy Width (without optional rock deflectors)


Outside Body Width


Inside Body Width


Front Canopy Height


Rear Axle - Clearance


Centerline of Rear Dual Tire Width


Overall Tire Width


Overall Canopy Width



ROPS Standards

ROPS (Rollover Protective Structure) meets ISO 3471:1994.

FOPS Standards

FOPS (Falling Object Protective Structure) meets ISO 3449:1992.


Sound Standards (1)

The operator sound pressure level measured according to work cycle procedures specified in ISO 6394 and 6396 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.


Steering Standards

ISO 5010:2007


Gross Machine Operating Weight is 521 631 kg (1,150,000 lb).

Steer Angle


Standard Equipment:

  • Power Train
    • C175-16 Diesel Engine
      – Turbocharging (4)/aftercooled
      – Air to air after cooler (ATAAC)
      – Air cleaner (4) with precleaner
      – Elevated low idle control
      – Multi-point oil pressure sensing
      – Pre-lubrication/engine
    • Braking system:
      – Brake release towing
      – Oil-cooled, multi-disc (front and rear) (service, retarding, parking, secondary)
      – Automatic Retarder Control
      – Electric dynamic retarding with blended low speed
      – Extended life brake disc material
    • Cat AC drive train:
      – IGBT controlled AC induction motors
      – AC generator
      – AC cooled radial grid
    • Body-up reverse neutralizer
    • Programmable top speed
    • Rear axle continuous lube/filtration
    • Reverse shift inhibitor
    • Directional shift management
    • Neutral coast inhibitor
    • Body-up shift inhibitor
    • Neutral start inhibitor
  • Electrical
    • Alarm, backup
    • Brushless alternator 150 amp charging
    • Batteries – 12V (8) 90 amp hour
    • Converter, 12V electrical
    • Electrical system, 24V, 10, 15, 20 amp fuses and breakers
    • Battery charge receptacle
    • Lighting, signals/service:
      – Halogen lighting package
      – Backup and hazard lighting
      – Directional signals (front and rear LED)
      – Front stair access/service deck
      – Stop/tail lights (LED)
      – Engine compartment
      – Inverter energy LED warning lights
  • Operator Environment
    • Air conditioner
    • 12V DC power supply (1)
    • Cup holder (2)
    • Diagnostic connection port
    • Dome courtesy light
    • Entertainment radio ready:
      – 20 amp switched/10 amp memory converter
      – Speakers, and wiring harnesses
    • Gauges/indicators
    • Gauge panel:
      – Hydraulic oil temperature
      – Engine coolant temperature
      – Fuel level
      – DEF level (Tier 4 / Stage V only)
      – Electric engine control fault indicator
      – Electric hour meter
      – Speedometer
      – Tachometer
      – VIMS message center advisor
    • Heater/defroster
    • Storage space behind seat
    • ROPS cab, insulated/sound suppressed
    • Seat, operator, air suspension
    • Seatbelt, operator, three points
    • Seat, trainer, air suspension
    • Seatbelt, trainer, two point
    • Steering wheel, tilt, telescopic
    • Tinted glass
    • Window, electric powered, operator/passenger
    • Wiper, windshield, intermittent control and washer
    • Fixed access ladder
  • Fluids
    • Extended life coolant to –35° C (–30° F)
  • Other Standard Equipment
    • Traction control system
    • Auxiliary “buddy” dumping quick connect
    • Auxiliary steering quick connect (towing)
    • Rotating component guards
    • Fast fill fuel system (LH and RH side)
    • Fast fill DEF system (RH side) - Tier 4 / Stage V only
    • Fuel filter with water separator
    • Ground level battery lockout
    • Machine lockout
    • Engine start lockout
    • ECM cabinet lockout
    • Ground level engine shut-down
    • Rock ejectors (chain)
    • Tow hooks and pin (front)
    • Tow pin (rear) (empty truck only)
    • Mudflaps
    • Coolant level gauge (on radiator)
    • Automatic lubrication system
    • SOS℠ sample points (hydraulic, cooling, engine)

Optional Equipment:

  • Optional Equipment
    • 2050 kW (2,750 hp) and 2312 kW (3,100 hp) options available
    • HAA arrangements available
    • Throttle lock
    • Timer, engine shutdown
    • Body heat exhaust
    • Gel batteries (8)
    • High Intensity Discharge (HID) lighting package
    • LED lighting package
    • Fog lights
    • LED work lights
    • English or Metric gauges
    • Payload, digital display
    • Powered access ladder
    • Inverter platform
    • Fast fill fuel system (front and right)
    • Rims: Six (6) position and quick change
    • ANSI and ISO service instructions
    • Retarding indicator light
    • Cab pedestal for additional display
    • Radio/CD player
    • Front bumper center tow attachment
    • Brake wear indicator tool
    • Coolant –50° C (–58° F)
    • HE dump body rock box liner
    • HE dump body canopy rock deflectors
    • Heated mirrors (LH and RH)
    • Rear axle oil cooler
    • Standard accumulators and Australia/Canada certified accumulators
    • Hot start, for cold weather
    • Diesel fuel warmer
    • Wheel chocks (ANSI or ISO)
    • Portable fire extinguisher
    • Murphy gauge
    • High efficiency dump body
      – 1543 kg/m³ (2,600 lb/yd³) density body
      – 1721 kg/m³ (2,900 lb/yd³) density body
      – 1839 kg/m³ (3,100 lb/yd³) density body
      – 2076 kg/m³ (3,500 lb/yd³) density body
    • Canopy extension
    • Body rock box
    • Side profile lighting
    • Central service
    • 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

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