New CAT Equipment

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 297tonnes (327tons) 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.

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Learn more about the 794 AC Mining Truck


Product Specs


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

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 (AEHQ0250) for maximum gross machine weight limitations.
Note (4) Tier 4 Final / Stage V chassis weight: 426312 lb (193372 kg)

Final Drives

Total Reduction Ratio 35:1

AC Drive System

Total Reduction Ratio 35:1
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


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

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

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

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 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

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

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.


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
Note Gross Machine Operating Weight is 521 631 kg (1,150,000 lb).
Steer Angle 39 °

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 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