The Caterpillar CAT 307D excavator with the Mitsubishi 4M40 engine has a rated net power of 40 kW (54 hp) at 2000 rpm, with a bore of 95 mm, stroke of 100 mm, and a displacement of 2.8 liters. This inline-four, turbocharged diesel engine is designed for durability and efficiency, featuring an induction-hardened crankshaft and wear-resistant components like heat-resistant aluminum alloy pistons and a cylinder block with a laser-hardened upper part.
A Caterpillar excavator CAT 307 Mitsubishi 4M40 complete engine refers tothe engine component for a Caterpillar 307C mini excavator, which is powered by a Mitsubishi 4M40 model engine. The 4M40 is a 2.8-liter, four-cylinder diesel engine. This combination is for a specific excavator model and is a replacement or rebuild engine for that machine.
This is the excavator model, a mini excavator that performs digging and loading tasks.
This is the specific engine model used by Caterpillar in some 307 series excavators.
This indicates the entire engine assembly is being referred to, which could be a new, used, or rebuilt unit.
The phrase is common when seeking a replacement engine or overhaul kit for a Caterpillar 307 mini excavator, as the 4M40 engine is a component used in these machines, notes
 at 2000 rpm, with a bore of 95 mm, stroke of 100 mm, and a displacement of 2.8 liters. This inline-four, turbocharged diesel engine is designed for durability and efficiency, featuring an induction-hardened crankshaft and wear-resistant components […]){kind=link}
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