794 AC Mining Truck

794 AC Mining Truck

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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.


Engine Model
Cat® C175-16
Gross Power - SAE J1995
3500 hp
6.9 in
8.7 in
5187 in3
Standard Gross Power – SAE J1995*
3500 hp
* Contact factory for low HP, lower emissions tier configurations and high altitude configurations.
Power Ratings apply at 1,800 rpm when tested under the specified conditions for the specified standard.
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).
No engine derating required up to 1829 m (6,000 ft) altitude.
Equivalent to U.S. EPA Tier 2 emission standards.

Weights – approximate

Chassis Weight
417187 lb
Body Weight
62140 lb
Gross Machine Operating Weight
1150000 lb
Consult your tire manufacturer for maximum tire load.
Chassis weight with 100% fuel, hoist, body mounting group, rims, and tires.
Body weight varies depending on how body is equipped.

Operating Specifications

Nominal Payload Capacity
320 tons
Steer Angle
39 Degrees
Top Speed – Loaded
37 mph
Gross Machine Operating Weight (GMW)
1150000 lb
Minimum Turning Radius
53 ft
Payload assumes no debris, no extra options or attachments.
Refer to the Cat Mining Truck 10/10/20 Overload Policy (AEXQ0250) for maximum gross machine weight limitations.

Final Drives

Total Reduction Ratio

AC Drive System

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

Braking System

Dynamic Retarding Power – Continuous
5480 hp
Electric Retarding
Radial Grid Design
Front Wet Disc Brake Surface Area
20378 in2
Rear Wet Disc Brake Surface Area
30750 in2
ISO 3450:2011

Weight Distributions – approximate

Front Axle – Loaded
33 %
Rear Axle – Loaded
67 %
Front Axle – Empty
49 %
Rear Axle – Empty
51 %

Service Refill Capacities

Cooling System
211 gal
82 gal
Final Drives, each
67 gal
Fuel Tank
1300 gal
Hydraulic System (includes tank)
385 gal
Hydraulic Tank
296 gal


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

Dimensions (Approximate)

Height to Top of ROPS
22.25 ft
Overall Length
50.75 ft
21.83 ft
Rear Axle to Tail
15.50 ft
Ground Clearance
2.67 ft
Dump Clearance
3.00 ft
Loading Height – Empty
22.92 ft
Overall Height – Body Raised
48.42 ft
Centerline Front Tire Width
23.00 ft
Front Axle Clearance
3.17 ft
Overall Canopy Width
32.00 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 Rear Dual Tire Width
18.75 ft
Overall Tire Width
28.67 ft
Dimensions based on 1936 m3 (253 yd3) HE Body.


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


Sound Standard
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 Standard
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).

Capacity – HE Body – 100% fill factor

Dump Body Plate Thickness Varies Depending on Body Selection – Canopy Plate
0.20 in
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
Heaped (SAE 2:1)
180-222 m3 (236-290 yd3)
108-133 m3 (142-175 yd3)
Contact your local Cat dealer for body recommendations.
    • C175-16 Tier 2 equivalent emission standards
    • 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
      • 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)
    • 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)
  • Contact factory for low HP, lower emissions tier configurations and high altitude configurations
  • 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