Mining Trucks

794 AC Mining Truck

Nominal Rated Payload

327 ton (US)

Rated Gross Machine Weight

1,150,000 lb

Gross Power - SAE J1995

3,500 HP


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.

    AC Drive System

    Total Reduction Ratio


    Top Speed - Loaded

    37 mile/h


    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

    Body Hoists

    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

    3,029 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.

    Braking System

    Service Brakes

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

    Front Wet Disc Brake Surface Area

    20,378 in²

    Rear - Wet Disc Brake Surface Area

    30,750 in²


    ISO 3450:2011

    Parking Brake

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

    Load Brake

    Rear service brakes

    Dynamic Retarding Power - Continuous

    5,480 HP

    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

    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


    Contact your local Cat dealer for body recommendations.

    Dimensions (Approximate)

    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


    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


    Gross Power - SAE J1995

    3,500 HP

    Standard Gross Power - SAE J1995

    3,500 HP

    Engine Model

    Cat® C175-16

    Optional Gross Power - SAE J1995

    3,100 HP

    Optional Gross Power - SAE J1995 (Option 2)

    2,750 HP

    Rated Speed

    1,800 r/min

    Net Power - SAE J1349

    3,405 HP

    Emissions Rating

    Fuel Optimized


    6.9 in


    8.7 in


    5,187 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)

    Final Drives

    Total Reduction Ratio



    ROPS Standards

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

    FOPS Standards

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

    Service Refill Capacities

    Fuel Tank

    1,300 gal (US)

    Cooling System

    211 gal (US)


    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.


    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

    39 °


    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.

    Weight Distributions - Approximate

    Front Axle - Empty

    49 %

    Rear Axle - Empty

    51 %

    Front Axle - Loaded

    33 %

    Rear Axle - Loaded

    67 %

    Weights - Approximate

    Nominal Rated Payload

    327 ton (US)

    Rated Gross Machine Weight

    1,150,000 lb

    Chassis Weight

    426,237 lb

    Body Weight

    64,346 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)

      • 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
    • FLUIDS
      • 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)

      • 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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