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Liebherr RL66

Series: Liebherr Crawler Pipe Layer

Source: https://www.liebherr.com/en-us/earthmoving/products/pipe-lay

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The RL66 from Liebherr is part of the Liebherr Crawler Pipe Layer series. The engine delivers 275 kW, with a displacement of 12,000.2 cm³. Rated speed is 1,800 rpm. The unladen weight is 59,350 kg. Ground clearance is 554.7 mm. The tank holds 660.2 litres. The pump delivers 283.1 l/min. The hydraulic tank holds 129.1 litres. The cooling system holds 68.1 litres. The oil fill is 43.2 litres. The electrical system runs on 24 V. The engine fitted is the D 946 A7 Emission regulations . EPA/CARB Tier 3/Tier 4f. The Liebherr Crawler Pipe Layer series covers 4 models. Rated output within it ranges from 175 to 275 kW; the RL66 sits at the top of that range with 275 kW. Its immediate neighbours are the RL56 below it with 210.1 kW. 480 Liebherr models across 20 series are on record. The model is listed under Excavators & compaction. 16 verified figures from 1 source are on file.

Technical data

Engine

Engine model	D 946 A7 Emission regulations, EPA/CARB Tier 3/Tier 4fcorrect
Power	275 kWcorrect
Rated speed	1,800 rpmcorrect
Displacement	12,000.2 cm³correct
Aspiration	Turbochangedcorrect
Coolant capacity	68.1 lcorrect
Engine oil capacity	43.2 lcorrect

Dimensions and weights

Length	5,797.3correct
Width	3,349.8correct
Ground clearance	554.7correct
Unladen weight	59,350 kgcorrect

Drivetrain and chassis

Gearbox type	continuously variable transmission hydrostatic transmission travel drive, independent drive for each trackcorrect
System voltage	24 Vcorrect

Working data

Pump flow	283.1 l/mincorrect
Hydraulic oil capacity	129.1 lcorrect
Fuel tank capacity	660.2 lcorrect

Where this model stands

Power-to-weight ratio: 4.6 kW/t (275 kW / 59.4 t)

Stronger than 82% of the pipeline equipment in the register — out of 12 models with a stated power figure.

Calculated from the documented figures above — not a rating.

Frequently asked questions

How much power does the Liebherr RL66 have?

The Liebherr RL66 delivers 275 kW.

How much does the Liebherr RL66 weigh?

The unladen weight is 59,350 kg.

What engine does the Liebherr RL66 have?

12,000 cm³ displacement.

What are the dimensions of the Liebherr RL66?

5,797 mm × 3,350 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.
Check the weights in the papers against the figures here — attachments change them.
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 16 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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