Caterpillar 305C CR

Series: Caterpillar Midi Excavator

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The Caterpillar 305C CR belongs to the Caterpillar Midi Excavator series. The engine delivers 49.2 hp (35 kW), has 4 cylinders, with a displacement of 2,507.2 cm³. Rated speed is 2,400 rpm. The unladen weight is 5,200 kg. Ground clearance is 341.4 mm. The tank holds 71.9 litres. The pump delivers 129.8 l/min. The hydraulic tank holds 78 litres. Working pressure is 245 bar. The cooling system holds 11 litres. The oil fill is 7.2 litres. The electrical system runs on 12 V. The engine fitted is the Mitsubishi S4Q2-T. The Caterpillar Midi Excavator series covers 12 models. Rated output within it ranges from 41.6 to 67.5 hp; the 305C CR sits in the lower part of that range with 49.2 hp. Its immediate neighbours are the 304C CR below it with 43.8 hp and the 307B above it with 55.8 hp. 1091 Caterpillar models across 47 series are on record. The model is listed under Excavators & compaction. 16 verified figures from 1 source are on file.

Technical data

Engine

Engine modelMitsubishi S4Q2-Tcorrect
Power49.2 hp (35 kW)correct
Rated speed2,400 rpmcorrect
Cylinders4correct
Displacement2,507.2 cm³correct
Coolant capacity11 lcorrect
Engine oil capacity7.2 lcorrect

Dimensions and weights

Ground clearance341.4correct
Unladen weight5,200 kgcorrect

Drivetrain and chassis

System voltage12 Vcorrect

Working data

Pump flow129.8 l/mincorrect
Hydraulic oil capacity78 lcorrect
Hydraulic pressure245 barcorrect
Fuel tank capacity71.9 lcorrect

Other data

Height2,514.6correct

Where this model stands

Power-to-weight ratio: 6.7 kW/t (35 kW / 5.2 t)

Stronger than 6% 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 305C CR have?

The Caterpillar 305C CR delivers 49.2 hp.

How much does the Caterpillar 305C CR weigh?

The unladen weight is 5,200 kg.

What engine does the Caterpillar 305C CR have?

4 cylinders, 2,507 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 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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Other models in this series

Sources: [1]

Excavator in 3D section

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