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Caterpillar 797B Off-Highway Truck


The Caterpillar 797B is the predecessor to the 797F and second in the 797 ultra class line of off-highway, haul trucks. It is rated to haul up to 380 tons and built for mining and heavy-duty construction applications around the world. The B model increased payload and engine power over the original 797.


Articulating/Rigid Rigid


Dump Ground Clearance6.2 ft
Dump Height50.2 ft
Ground Clearance2.9 ft
Overall Height24.9 ft
Overall Length47.7 ft
Overall Width30.1 ft
Wheelbase23.7 ft


Drive Config 4x2


Dump Angle45 deg
Load Capacity - heaped287.8 cu yd
Lower Time18.5 seconds
Raise Time25 seconds
Rated Payload380 t


Aspiration75 amps
Displacement7143 cu in
Engine Model3524B HD EUI
Gross Power3550 hp
Net Power3370 hp
Number of Cylinders24
Power Measured @1750 rpm
Rated Engine Speed263 rpm
Torque Measured @Turbocharged rpm

Operating Specifications

Alternator Supplied AmperageSeven-speed planetary powershift with direct-injection
Brake/Hoist System Fluid Capacity486.7 gal
Cooling System Fluid Capacity315 gal
Diff and Final Drive Fluid Capacity110 gal
Engine Oil Capacity110 gal
Fuel Capacity1800 gal
Hydraulic System Fluid Capacity263 gal
Operating Voltage24 volts
Steering System Fluid Capacity114 gal
Tire Size59/80R63 Standard Tires

Service Refill Capacities

Brake/Hoist Hydraulic Tank793664.1 gal


Max Speed42 mph
Number of Gears - Forward7
Number of Gears - Reverse1
Transmission TypeSeven-speed planetary powershift with direct-injection


Empty Weight584225 lbs
Loaded Weight1375000 lbs
Operating Weight 1375000 lbs
Weight Distribution Front - empty43.5%
Weight Distribution Front - loaded33.3%
Weight Distribution Rear - empty56.5%
Weight Distribution Rear - loaded66.7%

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39.04690 \\ -77.49030 \\ Ashburn \\ PA