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794 AC Mining Truck

794 AC Mining Truck

At a Glance

Nominal Payload Capacity
320 ton (US)
Engine Model
Cat® C175-16
Gross Power - SAE J1995
3500 HP
6.9 in
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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.

Operating Specifications

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Nominal Payload Capacity 320ton (US)
Steer Angle 39°
Top Speed - Loaded 37mile/h
Note (2) Refer to the Cat Mining Truck 10/10/20 Overload Policy (AEXQ0250) for maximum gross machine weight limitations.
Note (1) Payload assumes no debris, no extra options or attachments.
Gross Machine Operating Weight (GMW) 1150000lb
Minimum Turning Radius 53ft


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Engine Model Cat® C175-16
Gross Power - SAE J1995 3500HP
Bore 6.9in
Stroke 8.7in
Displacement 5187in³
Standard Gross Power - SAE J1995 3500HP
Note (4) High altitude configurations available for altitudes up to 4267 m (14,000 ft) without derate.
Note (3) Optional 2,750 hp and 3,100 hp ratings. Optional emission ratings. Contact factory for available offerings.
Note (2) 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).
Note (1) Power ratings apply at 1,800 rpm when tested under the specified conditions for the specified standard.

Final Drives

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Total Reduction Ratio 35 to 1

Weights - Approximate

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Note (3) Body weight varies depending on how body is equipped.
Note (2) Chassis weight with 100% fuel, hoist, body mounting group, rims, and tires.
Note (1) Consult your tire manufacturer for maximum tire load.
Gross Machine Operating Weight 1150000lb
Chassis Weight 417187lb
Body Weight 62140lb

Weight Distributions - Approximate

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


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


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Note Gross Machine Operating Weight is 521 631 kg (1,150,000 lb).
Steering Standards ISO 5010:2007


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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.

Service Refill Capacities

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Hydraulic System - Including Tank 385gal (US)
Fuel Tank 1300gal (US)
Final Drive - Each 67gal (US)
Crankcase 82gal (US)
Cooling System 211gal (US)
Hydraulic Tank 296gal (US)

Dimensions (Approximate)

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Ground Clearance 2.67ft
Wheel Base 21.83ft
Rear Axle - Tail 15.5ft
Loading Height - Empty 22.92ft
Inside Body Width 28.08ft
Height - Top of ROPS 22.25ft
Front Canopy Height 26.33ft
Front Axle Clearance 3.17ft
Dump Clearance 3ft
Centerline of Rear Dual Tire Width 18.75ft
Centerline Front Tire Width 23ft
Rear Axle - Clearance 3.08ft
Overall Tire Width 28.67ft
Overall Length 50.75ft
Overall Height - Body Raised 48.42ft
Outside Body Width 29.75ft
Note Dimensions based on 193.6 m³ (253 yd³) HE Body.
Canopy Width (without optional rock deflectors) 29.75ft


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

Capacity - HE Body - 100% fill factor

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Struck 108-133 m³ (142-175 yd³)
Note Contact your local Cat dealer for body recommendations.
Heaped (SAE 2:1) 180-222 m³ (236-290 yd³)
Dump Body Plate Thickness Varies Depending on Body Selection - Side Plate 0.31in
Dump Body Plate Thickness Varies Depending on Body Selection - Front Plate 0.35in
Dump Body Plate Thickness Varies Depending on Body Selection - Floor Plate 0.63in
Dump Body Plate Thickness Varies Depending on Body Selection - Canopy Plate 0.2in

Braking System

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

Body Hoists

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Total Cycle Time 44s
Relief Valve Setting - Raise 3029psi
Pump Flow - High Idle (LAA at 1,960 rpm) 240gal/min
Pump Flow - High Idle (HAA at 1,800 rpm) 221gal/min
Note (3) Automatic body-lower modulation reduces impact on frame.
Note (2) Power raise in both stages; power down in both stages possible.
Note (1) Twin, two-stage hydraulic cylinders mounted inside main frame; double-acting cylinders in both stages.
High Idle Body Lower Time - Float 20s
Body Raise Time - High Idle 24s

AC Drive System

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