Caterpillar 307B SB

Series: Caterpillar Midi Excavator

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The 307B SB from Caterpillar is part of the Caterpillar Midi Excavator series. The engine delivers 41.6 hp (30.6 kW), with a displacement of 2,835 cm³. The unladen weight is 8,416.4 kg. Ground clearance is 381 mm. The tank holds 135.1 litres. The pump delivers 128.3 l/min. The hydraulic tank holds 105.2 litres. The engine fitted is the 4M40E1. The Caterpillar Midi Excavator series covers 12 models. Rated output within it ranges from 41.6 to 67.5 hp; the 307B SB sits at the bottom of that range with 41.6 hp. Its immediate neighbours are the 304C CR above it with 43.8 hp. 1091 Caterpillar models across 47 series are on record. The model is listed under Excavators & compaction. 10 verified figures from 1 source are on file.

Technical data

Engine

Engine model4M40E1correct
Power41.6 hp (30.6 kW)correct
Displacement2,835 cm³correct

Dimensions and weights

Ground clearance381correct
Unladen weight8,416.4 kgcorrect

Working data

Pump flow128.3 l/mincorrect
Hydraulic oil capacity105.2 lcorrect
Fuel tank capacity135.1 lcorrect

Other data

Height2,642.6correct

Where this model stands

Power-to-weight ratio: 3.6 kW/t (31 kW / 8.4 t)

Stronger than 5% 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 307B SB have?

The Caterpillar 307B SB delivers 41.6 hp.

How much does the Caterpillar 307B SB weigh?

The unladen weight is 8,416 kg.

What engine does the Caterpillar 307B SB have?

2,835 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 10 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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