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794 AC Mining Truck

Nominal Rated Payload

327 ton (US)

Rated Gross Machine Weight

1150000 lb

Gross Power - SAE J1995

3500 HP


The Cat® 794 AC electric drive truck delivers a full 327-ton 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, making it the ideal choice for a wide 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.



  • Overview of 794 AC Mining Truck
  • Experience the 794 AC Mining Truck
  • Updates & Enhancements to Cat AC Mining Trucks

360° View


360° Exterior view. Double click on the image to zoom in on any area of the product.


360° interior view. Double click on the image to zoom in on any area of the product.


794 AC Virtual Product Tour



  • Engine
    Spec Value
    Gross Power - SAE J1995 3500 HP
    Standard Gross Power - SAE J1995 3500 HP
    Engine Model Cat® C175-16
    Optional Gross Power - SAE J1995 3100 HP
    Optional Gross Power - SAE J1995 (Option 2) 2750 HP
    Rated Speed 1800 r/min
    Net Power - SAE J1349 3405 HP
    Emissions Rating Fuel Optimized
    Bore 6.9 in
    Stroke 8.7 in
    Displacement 5187 in³
    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)
  • Weights - Approximate
    Spec Value
    Nominal Rated Payload 327 ton (US)
    Rated Gross Machine Weight 1150000 lb
    Chassis Weight 426237 lb
    Body Weight 64346 lb
    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)
  • Final Drives
    Spec Value
    Total Reduction Ratio 35:01:00
  • AC Drive System
    Spec Value
    Total Reduction Ratio 35:01:00
    Top Speed - Loaded 37 mile/h
    Generator/Alternator Brushless, engine mounted, dual bearing
    Controls 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
  • Tires
    Spec Value
    Standard Tires 53/80 R63
    Rims 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.
  • Braking System
    Spec Value
    Service Brakes Four-Corner, Wet Disc, Oil Cooled, Hydraulically Actuated
    Front Wet Disc Brake Surface Area 20378 in²
    Rear - Wet Disc Brake Surface Area 30750 in²
    Standards ISO 3450:2011
    Parking Brake Four-corner, Multi-disc, Spring applied, Hydraulically Released
    Load Brake Rear service brakes
    Dynamic Retarding Power - Continuous 5480 HP
  • Weight Distributions - Approximate
    Spec Value
    Front Axle - Empty 49 %
    Rear Axle - Empty 51 %
    Front Axle - Loaded 33 %
    Rear Axle - Loaded 67 %
  • Body Hoists
    Spec Value
    Pump Flow - High Idle (HAA at 1,800 rpm) 221 gal/min
    Pump Flow - High Idle (LAA at 1,960 rpm) 240 gal/min
    Relief Valve Setting - Raise 3029 psi
    Body Raise Time - High Idle 24 s
    High Idle Body Lower Time - Float 20 s
    Total Cycle Time 44 s
    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
    Spec Value
    Struck 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 0.63 in
    Dump Body Plate Thickness Varies Depending on Body Selection - Front Plate 0.35 in
    Dump Body Plate Thickness Varies Depending on Body Selection - Side Plate 0.31 in
    Dump Body Plate Thickness Varies Depending on Body Selection - Canopy Plate 0.2 in
    Note Contact your local Cat dealer for body recommendations.
  • Service Refill Capacities
    Spec Value
    Fuel Tank 1300 gal (US)
    Cooling System 211 gal (US)
    Crankcase 82 gal (US)
    Final Drive - Each 67 gal (US)
    Hydraulic Tank 296 gal (US)
    Hydraulic System - Including Tank 385 gal (US)
    Diesel Exhaust Fluid Tank 100 gal (US)
    Note (1) DEF Tank only available for EPA Tier 4 / EU Stage V engine option.
  • Cab
    Spec Value
    ROPS Standards (1) Rollover Protective Structure (ROPS) meets ISO 3471:2008 criteria for operator and ISO 13459:2012 for trainer.
    FOPS Standards Falling Object Protective Structure (FOPS) meets ISO 3449:2005 Level II for operator and ISO 13459:2012 Level II for trainer.
  • Sound
    Spec Value
    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
    Spec Value
    Steering Standards ISO 5010:2007
    Note Gross Machine Operating Weight is 521 631 kg (1,150,000 lb).
    Steer Angle 39 °
  • Dimensions (Approximate)
    Spec Value
    Height - Top of ROPS 22.25 ft
    Overall Length 50.75 ft
    Wheel Base 21.83 ft
    Rear Axle - Tail 15.5 ft
    Ground Clearance 2.67 ft
    Dump Clearance 3 ft
    Loading Height - Empty 22.92 ft
    Overall Height - Body Raised 48.42 ft
    Centerline Front Tire Width 23 ft
    Front Axle Clearance 3.17 ft
    Canopy Width (without optional rock deflectors) 29.75 ft
    Outside Body Width 29.75 ft
    Inside Body Width 28.08 ft
    Front Canopy Height 26.33 ft
    Rear Axle - Clearance 3.08 ft
    Centerline of Rear Dual Tire Width 18.75 ft
    Overall Tire Width 28.67 ft
    Overall Canopy Width 31.5 ft

Standard Equipment


  • 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


  • 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


  • 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


  • Extended life coolant to –35° C (–30° F)


  • 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
  • S•O•S℠ sample points (hydraulic, cooling, engine)

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