Caterpillar 789
Series: Caterpillar Rock Truck
With the 789, Caterpillar offers a model from the Caterpillar Rock Truck series. The engine delivers 1,825 hp (1,271.4 kW), with a displacement of 69,101 cm³. The wheelbase measures 5,702.8 mm. Top speed is 54.1 km/h. The tank holds 3,222.1 litres. The engine fitted is the 3,516. Tyre size: 37,00R57 (E-4). The Caterpillar Rock Truck series covers 29 models. Rated output within it ranges from 480.6 to 3,599.2 hp; the 789 sits in the middle of that range with 1,825 hp. Its immediate neighbours are the 785C below it with 1,471.1 hp and the 789C above it with 1,926.4 hp. 1091 Caterpillar models across 47 series are on record. The model is listed under Mining equipment. 9 verified figures from 1 source are on file.
Technical data
Engine
| Engine model | 3,516correct |
|---|---|
| Power | 1,825 hp (1,271.4 kW)correct |
| Displacement | 69,101 cm³correct |
Dimensions and weights
| Length | 12,182.9correct |
|---|---|
| Height | 6,150 mmcorrect |
| Wheelbase | 5,702.8correct |
Drivetrain and chassis
| Tyre size | 37.00R57 (E-4)correct |
|---|---|
| Top speed | 54.1 km/hcorrect |
Working data
| Fuel tank capacity | 3,222.1 lcorrect |
|---|
Frequently asked questions
How much power does the Caterpillar 789 have?
The Caterpillar 789 delivers 1,825 hp.
What engine does the Caterpillar 789 have?
69,101 cm³ displacement.
How fast does the Caterpillar 789 go?
Top speed is 54.1 km/h.
What are the dimensions of the Caterpillar 789?
12,183 mm × 6,150 mm.
What to check before buying
- Check the hour meter against the service records — a replaced instrument is the most common gap.
- Compare the data plate and chassis number with the papers.
- Load the hydraulics and watch for sag.
- Ask about parts availability for this build year — the running costs hang on it.
A general list for this type of machine — no substitute for an inspection or an appraiser.
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This page carries 10 individual figures for this model. They come from 1 recorded source; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.
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Other models in this series
Sources: [1]
Dump truck in 3D section
Turn the model, look inside and click an assembly — each one is explained.