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Caterpillar 12G

Series: Caterpillar Motor Grader

Wikimedia Commons · CC BY-SA 4.0 · Acroterion · Dateiseite
The Caterpillar Motor Grader series from Caterpillar includes the 12G. The engine delivers 136.9 hp, has 6 cylinders, with a displacement of 10,500.8 cm³. Rated speed is 2,200 rpm. The unladen weight is 14,330 kg. The wheelbase measures 5,922.3 mm. Ground clearance is 640.1 mm. The tank holds 283.1 litres. The hydraulic tank holds 76.1 litres. Working pressure is 148.2 bar. The cooling system holds 47.3 litres. The electrical system runs on 24 V. The Caterpillar Motor Grader series covers 37 models. Rated output within it ranges from 126.7 to 540.4 hp; the 12G sits at the bottom of that range with 136.9 hp. Its immediate neighbours are the 120G below it with 126.7 hp and the 120M above it with 139.9 hp. 1091 Caterpillar models across 47 series are on record. The model is listed under Motor graders. 14 verified figures from 1 source are on file.

Technical data

Engine

Power136.9 hpcorrect
Rated speed2,200 rpmcorrect
Cylinders6correct
Displacement10,500.8 cm³correct
Coolant capacity47.3 lcorrect

Dimensions and weights

Length8,311.9correct
Wheelbase5,922.3correct
Ground clearance640.1correct
Unladen weight14,330 kgcorrect

Drivetrain and chassis

Gearbox typeCat-built direct drive power shiftcorrect
System voltage24 Vcorrect

Working data

Hydraulic oil capacity76.1 lcorrect
Hydraulic pressure148.2correct
Fuel tank capacity283.1 lcorrect

Where this model stands

Power-to-weight ratio: 7 kW/t (101 kW / 14.3 t)

Stronger than 18% 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 12G have?

The Caterpillar 12G delivers 137 hp.

How much does the Caterpillar 12G weigh?

The unladen weight is 14,330 kg.

What engine does the Caterpillar 12G have?

6 cylinders, 10,501 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.

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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

120B

120G

120H

120H ES

120H NA

120M

120M2

12H

12H ES

12H NA

12M

135H

Sources: [1]

Grader in 3D section

Turn the model, look inside and click an assembly — each one is explained.

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