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Caterpillar 303C CR

Series: Caterpillar Mini Excavator

Source: https://commons.wikimedia.org/wiki/File:Caterpillar_303.5E_C

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The 303C CR from Caterpillar is part of the Caterpillar Mini Excavator series. The engine delivers 31.4 hp (22.4 kW), has 3 cylinders, with a displacement of 1,900.9 cm³. Rated speed is 2,300 rpm. The unladen weight is 3,435.1 kg. Ground clearance is 317 mm. The tank holds 45 litres. The pump delivers 87.8 l/min. The hydraulic tank holds 65.1 litres. Working pressure is 245 bar. The cooling system holds 6.1 litres. The oil fill is 6.1 litres. The electrical system runs on 12 V. The engine fitted is the Mitsubishi S3Q2. The Caterpillar Mini Excavator series covers 7 models. Rated output within it ranges from 18.7 to 41.6 hp; the 303C CR sits in the middle of that range with 31.4 hp. Its immediate neighbours are the 302.5C below it with 27.1 hp and the 303.5C CR above it with 41.6 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 S3Q2correct
Power31.4 hp (22.4 kW)correct
Rated speed2,300 rpmcorrect
Cylinders3correct
Displacement1,900.9 cm³correct
Coolant capacity6.1 lcorrect
Engine oil capacity6.1 lcorrect

Dimensions and weights

Ground clearance317correct
Unladen weight3,435.1 kgcorrect

Drivetrain and chassis

System voltage12 Vcorrect

Working data

Pump flow87.8 l/mincorrect
Hydraulic oil capacity65.1 lcorrect
Hydraulic pressure245 barcorrect
Fuel tank capacity45 lcorrect

Other data

Height2,490.2correct

Where this model stands

Power-to-weight ratio: 6.5 kW/t (22 kW / 3.4 t)

Stronger than 74% of the mini excavators in the register — out of 400 models with a stated power figure.

Calculated from the documented figures above — not a rating.

Frequently asked questions

How much power does the Caterpillar 303C CR have?

The Caterpillar 303C CR delivers 31.4 hp.

How much does the Caterpillar 303C CR weigh?

The unladen weight is 3,435 kg.

What engine does the Caterpillar 303C CR have?

3 cylinders, 1,901 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.
  • 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

301.5

301.6-05A

301.6C

301.8C

302.5

302.5C

303.5C CR

Sources: [1]

Mini excavator in 3D section

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