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.

Weights - Approximate

Nominal Rated Payload
327 ton (US)
Rated Gross Machine Weight
1150000 lb
Chassis Weight
417187 lb
Body Weight
62140 lb
Note (1)
Consult your tire manufacturer for maximum tire load.
Note (2)
Chassis weight with 100% fuel, hoist, body mounting group, rims, and tires.
Note (3)
Body weight varies depending on how body is equipped.
Note (4)
Tier 4 Final / Stage V chassis weight: 426312 lb (193372 kg)


Engine Model
Cat® C175-16
Gross Power - SAE J1995
3500 HP
Standard Gross Power - SAE J1995
3500 HP
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
6.9 in
5187 in³
8.7 in
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


Standard Tires
53/80 R63.
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.
Note (2)
Caterpillar recommends the customer evaluate all job conditions and consult tire manufacturer for proper tire selection.

Weight Distributions - Approximate

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

Service Refill Capacities

Fuel Tank
1300 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.

Operating Specifications

Top Speed - Loaded
37 mile/h
Minimum Turning Radius
53 ft
Note (1)
Payload assumes no debris, no extra options or attachments.
Note (2)
Refer to the Cat Mining Truck 10/10/20 Overload Policy (AEXQ0250) for maximum gross machine weight limitations.

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.

Braking System

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

AC Drive System

Brushless, engine mounted, dual bearing
IGBT Inverter Technology, air cooled, pressurized cabinet with filtration
Wheel Motor
Cat 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
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.

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


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