Caterpillar 120M
Series: Caterpillar Motor Grader
Not the right version? The data comes from vehicle registers holding many near-identical versions side by side. Photograph the data plate — we read make and type from it. Open the scanner e-mail address required
Technical data
Engine
| Engine model | Cat C6.6 ACERTcorrect |
|---|---|
| Power | 139.9 hpcorrect |
| Rated speed | 2,000 rpmcorrect |
| Cylinders | 6correct |
| Displacement | 6,604 cm³correct |
| Coolant capacity | 39.4 lcorrect |
Dimensions and weights
| Length | 8,488.7correct |
|---|---|
| Wheelbase | 5,913.1correct |
| Ground clearance | 579.1correct |
| Unladen weight | 20,271 kgcorrect |
Drivetrain and chassis
| Gearbox type | direct drive, power shift, countershaftcorrect |
|---|
Working data
| Hydraulic oil capacity | 60.2 lcorrect |
|---|---|
| Hydraulic pressure | 241.3correct |
| Fuel tank capacity | 340.7 lcorrect |
Where this model stands
Power-to-weight ratio: 5.1 kW/t (103 kW / 20.3 t)
Stronger than 24% of the motor graders in the register — out of 186 models with a stated power figure.
Calculated from the documented figures above — not a rating.
Frequently asked questions
How much power does the Caterpillar 120M have?
The Caterpillar 120M delivers 140 hp.
How much does the Caterpillar 120M weigh?
The unladen weight is 20,271 kg.
What engine does the Caterpillar 120M have?
6 cylinders, 6,604 cm³ displacement.
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.
- Check the weights in the papers against the figures here — attachments change them.
- 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.
We do not sell machines. We ask the dealers who carry this model and come back with price and lead time.
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This page carries 14 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]
Grader in 3D section
Turn the model, look inside and click an assembly — each one is explained.