Caterpillar 311D LRR
Series: Caterpillar Hydraulic Excavator
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Caterpillar 225 to 245 — Cat's first generation of hydraulic excavators
The numeric codes in the “Caterpillar Hydraulic Excavator” collective entry, such as 205, 215, 225, 235 or 245, come from Cat's early 200-series: in 1972 the 225 became Caterpillar's first production-ready hydraulic excavator, weighing around 24 tons with 135 horsepower.
Read on 4 more paragraphs
1973 brought the considerably larger 235, around 40 tons and 195 horsepower, and 1974 the 245 at roughly 66 tons and 325 horsepower, then the largest in the line, available as either a backhoe or a face-shovel configuration. The smaller 215 only joined in 1976 and, unlike the other models, was built by the German manufacturer Eder in Gosselies, Belgium.
The number itself therefore does not follow a strict weight formula but grew historically with each new model launch — it mainly marks the relative position within the product family rather than a fixed tonnage key like in newer series.
In today's collective entry the range runs from compact excavators around 30 kW up to large mining machines around 1,000 kW and well over 300 tons. When buying used, check bucket-tooth, bushing and pin wear as well as any leaks around the boom.
In short: 225, 235, 245 and 215 reflect the historical model order, not a fixed size grid — anyone who needs the exact operating range should check the individual model.
Sources: Kennwerte der Modelle Caterpillar Hydraulic Excavator, Geschichte der fruehen Caterpillar-Hydraulikbagger 200er-Reihe, Excavator Evolution, Caterpillar Unternehmensseite
Technical data
Engine
| Engine model | Cat C4.2 ACERTcorrect |
|---|---|
| Power | 87.2 hp (59.7 kW)correct |
| Displacement | 4,244.2 cm³correct |
| Coolant capacity | 18.2 lcorrect |
| Engine oil capacity | 19.3 lcorrect |
Dimensions and weights
| Ground clearance | 457.2correct |
|---|---|
| Unladen weight | 12,480.1 kgcorrect |
Drivetrain and chassis
| Top speed | 5 km/hcorrect |
|---|
Working data
| Pump flow | 117.3 l/mincorrect |
|---|---|
| Hydraulic oil capacity | 145.4 lcorrect |
| Hydraulic pressure | 350 barcorrect |
| Fuel tank capacity | 210.1 lcorrect |
Other data
| Cab height | 2,755.4correct |
|---|
Where this model stands
Power-to-weight ratio: 4.8 kW/t (60 kW / 12.5 t)
Stronger than 18% of the excavators & compaction in the register — out of 1,666 models with a stated power figure.
Calculated from the documented figures above — not a rating.
Frequently asked questions
How much power does the Caterpillar 311D LRR have?
The Caterpillar 311D LRR delivers 87.2 hp.
How much does the Caterpillar 311D LRR weigh?
The unladen weight is 12,480 kg.
What engine does the Caterpillar 311D LRR have?
4,244 cm³ displacement.
How fast does the Caterpillar 311D LRR go?
Top speed is 5 km/h.
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]
Excavator in 3D section
Turn the model, look inside and click an assembly — each one is explained.