Caterpillar 797F
Caterpillar’s 400-ton ultra-class hauler
The Cat 797F is one of the largest mechanical-drive haul trucks ever built, carrying around 363 tonnes (400 US tons) per load in the world’s biggest mines.
Photo: Dionisius Purba from Singapore, Singapore, CC BY 2.0 · license
+Strengths
- Huge payload with mechanical-drive efficiency on grades
- Compatible with Cat Command autonomy
- Global mining support network
−Watch-outs
- Only economical in very large mines
- Tyre supply and cost are significant
Overview
The Caterpillar 797 series has been Cat's largest haul truck since the original 797 appeared in 1998. The 797F, introduced in 2009, carries about 363 tonnes (400 US tons) and is powered by a 20-cylinder Cat C175 engine.
Why mechanical drive?
Caterpillar argues that a mechanical powertrain transmits power more efficiently on steep, long ramps than diesel-electric drive. The 797F uses a seven-speed planetary powershift transmission and oil-cooled brakes.
Autonomy
Many 797Fs operate autonomously with Cat MineStar Command for hauling, especially in Australia and the Americas.
Who it suits
Large open-pit copper, iron ore, coal and oil-sands mines with haul fleets matched to 360–400-tonne shovels and loaders.
Caterpillar 797F specifications
| Rated payload | ≈363 t (400 US tons) |
|---|---|
| Gross power | ≈2,983 kW (4,000 hp) |
| Engine | Cat C175-20, 20 cylinders |
| Gross machine weight | ≈624 t (1,375,000 lb) |
| Drive | Mechanical, 7-speed powershift |
| Tyres | 59/80R63 |
Figures are typical for standard configurations as published by Caterpillar. Values vary by market, emissions tier, attachments and options; confirm with your dealer before purchase, transport or lifting.
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