794 AC Mining Truck

794 AC Mining Truck

794 AC Mining Truck

Designed and manufactured by Caterpillar, the 794 AC electric drive truck is single sourced from one manufacturer and supported by the best dealer network. The 794 AC is designed to:

  • Deliver a true 291 tonnes (320 tons) capacity
  • Deliver reliability and uptime
  • Deliver easy serviceability
  • Deliver low owning and operating cost
  • Deliver operator confidence with four corner wet disc blended service brakes and traction control

The 794 AC is built to deliver to your bottom line.

Learn More About This Piece of Equipment

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Product Specs

Braking System

Front Wet Disc Brake Surface Area
Dynamic Retarding Power - Continuous
ISO 3450:2011
Rear - Wet Disc Brake Surface Area
Electric Retarding
Radial Grid Design

AC Drive System

IGBT Inverter Technology, air cooled, pressurized cabinet with filtration
Wheel Motor
Cat AC induction, rear axle mounted
Brushless, engine mounted, dual bearing
Cooling System
Variable speed, hydraulically driven cooling system

Service Refill Capacities

Hydraulic Tank
296gal (US)
Hydraulic System - Including Tank
385gal (US)
Fuel Tank
1300gal (US)
Final Drive - Each
67gal (US)
82gal (US)
Cooling System
211gal (US)

Dimensions (Approximate)

Ground Clearance
Overall Tire Width
Rear Axle - Tail
Front Canopy Height
Outside Body Width
Centerline of Rear Dual Tire Width
Inside Body Width
Wheel Base
Rear Axle - Clearance
Overall Length
Overall Height - Body Raised
Dimensions based on 193.6 m³ (253 yd³) HE Body.
Loading Height - Empty
Height - Top of ROPS
Front Axle Clearance
Dump Clearance
Centerline Front Tire Width
Canopy Width (without optional rock deflectors)


Note (1)
Power ratings apply at 1,800 rpm when tested under the specified conditions for the specified standard.
Engine Model
Cat® C175-16
Note (2)
Ratings based on SAE J1995 standard air conditions of 25° C (77° F) and 99 kPa (29.61 Hg) dry barometer. Power based on fuel having API gravity of 35 at 16° C (60° F) and an LHV of 42 780 kJ/kg (18.390 BTU/lb) when engine used at 30° C (86° F).
Gross Power - SAE J1995
Standard Gross Power - SAE J1995
Note (4)
High altitude configurations available for altitudes up to 4267 m (14,000 ft) without derate.
Note (3)
Optional 2,750 hp and 3,100 hp ratings. Optional emission ratings. Contact factory for available offerings.


Standard Tires
53/80 R63.
Note (2)
Caterpillar recommends the customer evaluate all job conditions and consult tire manufacturer for proper tire selection.
Note (1)
Production capabilities of the 794 AC truck are such that, under certain job conditions, TKPH (TMPH) capabilities could be exceeded and, therefore, limit production.

Weight Distributions - Approximate

Front Axle - Loaded
Rear Axle - Loaded
Rear Axle - Empty
Front Axle - Empty

Weights - Approximate

Gross Machine Operating Weight
Body Weight
Note (1)
Consult your tire manufacturer for maximum tire load.
Note (3)
Body weight varies depending on how body is equipped.
Note (2)
Chassis weight with 100% fuel, hoist, body mounting group, rims, and tires.
Chassis Weight


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 (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.

Operating Specifications

Note (2)
Refer to the Cat Mining Truck 10/10/20 Overload Policy (AEXQ0250) for maximum gross machine weight limitations.
Minimum Turning Radius
Top Speed - Loaded
Gross Machine Operating Weight (GMW)
Nominal Payload Capacity
320ton (US)
Note (1)
Payload assumes no debris, no extra options or attachments.
Steer Angle


ROPS Standards
ROPS (Rollover Protective Structure) meets ISO 3471:1994.
FOPS Standards
FOPS (Falling Object Protective Structure) meets ISO 3449:1992.

Capacity - HE Body - 100% fill factor

108-133 m³ (142-175 yd³)
Contact your local Cat dealer for body recommendations.
Heaped (SAE 2:1)
180-222 m³ (236-290 yd³)
Dump Body Plate Thickness Varies Depending on Body Selection - Side Plate
Dump Body Plate Thickness Varies Depending on Body Selection - Front Plate
Dump Body Plate Thickness Varies Depending on Body Selection - Floor Plate
Dump Body Plate Thickness Varies Depending on Body Selection - Canopy Plate

Body Hoists

Total Cycle Time
Relief Valve Setting - Raise
Pump Flow - High Idle (LAA at 1,960 rpm)
Pump Flow - High Idle (HAA at 1,800 rpm)
Note (3)
Automatic body-lower modulation reduces impact on frame.
Note (2)
Power raise in both stages; power down in both stages possible.
Note (1)
Twin, two-stage hydraulic cylinders mounted inside main frame; double-acting cylinders in both stages.
High Idle Body Lower Time - Float
Body Raise Time - High Idle


Steering Standards
ISO 5010:2007
Gross Machine Operating Weight is 521 631 kg (1,150,000 lb).

Final Drives

Total Reduction Ratio
35 to 1


  • 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
      • 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)
    • 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
    • S·O·S 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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