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797F Mining Truck

797F Mining Truck

At a Glance

Nominal Payload Capacity
400 ton (US)
Engine Model
Cat® C175-20
Gross Power - SAE J1995
4000 HP
6.9 in
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Whether you’re hauling copper, coal, gold, iron ore or overburden the 797F provides you with the best in class cost per unit of production. Including the improvements in safety, productivity, serviceability and comfort you will see why the 797F is the industry leader of its class. Combine these features with unmatched dealer support and you will see why more mine sites choose Cat Mining Trucks for their production needs.

Operating Specifications

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Nominal Payload Capacity 400ton (US)
Steer Angle 40°
Heaped SAE (2:1) Capacity 240-267 m3 (314-350 yd3)
Machine Clearance Turning Diameter 138ft
Top Speed - Loaded 42mile/h


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Engine Model Cat® C175-20
Gross Power - SAE J1995 4000HP
Bore 6.9in
Stroke 8.7in
Displacement 6469in³
Note (1) Power ratings apply at 1,750 rpm when tested under the specific conditions for the specified standard.
Note (2) Ratings based on SAE J1995 standard air conditions of 25° C (77° F) and 99 kPa (29.32 Hg) barometer. Power based on fuel having API gravity of 35 at 16° C (69° F) and an LHV of 42 780 kJ/kg (18,390 Btu/lb) when engine is used at 30° C (38° F).
Emissions U.S. EPA Compliant. Where applicable, the Cat C175-20 engine is compliant with U.S. EPA emission standards.
Note (3) No low altitude arrangement (LAA) engine derating required up to 2134 m (7,000 ft) altitude.
Note (4) No high altitude arrangement (HAA) engine derating required up to 4877 m (16,000 ft) altitude.


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Forward - 1 7mile/h
Forward - 2 9.5mile/h
Forward - 3 12.7mile/h
Forward - 4 17.2mile/h
Forward - 5 23.1mile/h
Forward - 6 31.2mile/h
Forward - 7 42mile/h
Reverse 7.4mile/h

Final Drives

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Differential Ratio 1.276:1
Planetary Ratio 16.67:1
Total Reduction Ratio 21.26:1
Note Double reduction, planetary with full floating axles.


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Rear axle - Oscillation ±4.0 degrees
Effective Cylinder Stroke - Front 12.3in
Effective Cylinder Stroke - Rear 6.5in


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Outside Diameter 42in
Standards ISO 3450:2011
Brake Surface 51243in²
Number of Discs per Side - Front 10
Number of Discs per Side - Rear 15

Service Refill Capacities

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Cooling System 306gal (US)
Crankcase 84gal (US)
Steering Tank 67gal (US)
Steering System - Including Tank 94gal (US)
Brake/Hoist Hydraulic Lines 219gal (US)
Brake/Hoist Tank 203gal (US)
Front Wheels - Each 16gal (US)
Torque Converter Sump 80gal (US)
Brake Hoist System - Includes Tank 441gal (US)
Differentials 311gal (US)
Final Drive - Each 49gal (US)
Fuel Tank 1000gal (US)
Torque Converter/Transmission System - Including Sump 166gal (US)

Weights - Approximate

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Body Weight Range 41 368-61 235 kg (91,200-135,000 lb)
Chassis Weight Range 210 630-219 146 kg (464,359-483,134 lb)
Target Gross Machine Operating Weight (GMW) 1375000lb
Note (1) Refer to the Cat Mining Truck 10/10/20 Payload Policy for maximum gross machine weight limitations.
Note (2) Body weight varies depending on body and liner configuration. Weight range for known applications.
Note (3) Chassis weight with 100 percent fuel, hoist, body mounting group, rims and tires.

Body Hoists

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High Idle Body Lower Time - Float 19s
Body Raise Time - High Idle 25s
Pump Flow - High Idle 317gal/min
Relief Valve Setting - Raise 3510psi


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Front Canopy Height - Empty 25.33ft
Loaded Ground Clearance 2.58ft
Height - Top of ROPS - Empty 21.4ft
Engine Guard Clearance - Loaded 3.33ft
Inside Body Depth - Maximum 11ft
Loading Height - Empty 23ft
Overall Height - Body Raised 51.5ft
Rear Axle - Clearance - Loaded 3.08ft
Overall Body Length 48.6ft
Inside Body Length 32.75ft
Overall Length 49.5ft
Wheel Base 23.58ft
Rear Axle - Tail 12.9ft
Dump Clearance 6.58ft
Centerline Front Tire Width 21.41ft
Overall Canopy Width 29.91ft
Outside Body Width 32ft
Inside Body Width 27.91ft
Centerline of Rear Dual Tire Width 20.41ft
Overall Tire Width 31.25ft

Capacity - MSD II - 100% Fill Factor

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Note Consult your local Cat dealer for truck body recommendations.
Heaped (SAE 2:1) 240-267 m3 (314-350 yd3)
Struck 188-213 m3 (246-290 yd3)

Approximate Weights - MSD II

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Front Axle - Empty 47.2%
Front Axle - Loaded 33.3%
Rear Axle - Empty 52.8%
Rear Axle - Loaded 66.7%

Weight Distributions - Approximate

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Front Axle - Empty 47.2%
Front Axle - Loaded 33.3%
Rear Axle - Empty 52.8%
Rear Axle - Loaded 66.7%


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ROPS Standards ROPS (Rollover Protective Structure) for cab offered by Caterpillar meets ISO 3471:2008 ROPS criteria.
FOPS Standards FOPS (Falling Objects Protective Structure) meets ISO 3449:2005 Level II FOPS criteria.


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Sound Standards (1) The operator sound pressure level measured according to work cycle procedures specified in ISO 6394:2008 and 6396:2008 is 76 dB(A) for cab offered by Caterpillar when properly installed and 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.


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Note Productive capabilities of the 797F are such that, under certain job conditions, TKPH (TMPH) capabilities of standard tires could be exceeded and, therefore, limit production.
Tires 59/80R63 – Michelin or Bridgestone


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Steering Standards ISO 5010:2007