Name: Crankcase for engine Cummins 3.9 3939408
Brand: Cummins
SKU: 73702
Rating: 4.8 (5 reviews)

Crankcase for engine Cummins 3.9 3939408

Cummins 3.9 engine block (3939408) – durable cast iron component for repairs and overhauls of engines in machines and vehicles.

Condition: reconditioned
SKU: 73702

Ocena 4,8

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	Manufacturer	Number	Condition:	SKU	Amount	Price Net
	Cummins	3.9 / 3939408	used	76725		-	- +

Applications

Product description

Cummins 3.9 Engine Block 3939408

Description

The Cummins 3.9 engine block with part number 3939408 is a durable and precisely manufactured component designed for rebuilding and repairing power units in construction machinery, industrial equipment, and commercial vehicles. This element plays a key role in ensuring structural rigidity and proper operation of pistons, crankshaft, and valve train. Thanks to high-quality materials and advanced manufacturing technology, the block guarantees long service life and reliable performance even under extreme operating conditions.

Technical Data

Part number: 3939408
Engine type: Cummins 3.9
Material: high-strength cast iron
Cylinder seats: precision machined
Mounting holes: OEM specification
Temperature resistance: up to 250 °C
Prepared for cylinder liners and bearings

Application

The engine block is used in a wide range of machines and vehicles powered by Cummins 3.9 units, including excavators, loaders, road machinery, generators, and commercial vehicles. It is suitable for both routine repairs and complete engine overhauls.

Properties

Durability – made of cast iron resistant to heavy loads and wear.
Precision – accurately machined to ensure perfect fit with other engine components.
Compatibility – fully compliant with Cummins OEM specifications for easy installation and reliable operation.
Resistance – withstands extreme working conditions, high temperatures, and heavy mechanical loads.
Versatility – suitable for many types of construction and industrial machines.

Specification

Specification	Value
name	Crankcase for engine
mark	Cummins
type	3.9
part number	3939408
condition	reconditioned
material	high-strength cast iron
temperature resistance	250 °C
weight	approx. 85 kg
preparation	for cylinder liners and bearings

Reference numbers

3939408
3.9

List of reviews:

Damian

2025-09-07

Blok silnika został dostarczony w odpowiednim stanie. Pasuje do mojego silnika, jednak nie miałem jeszcze okazji go przetestować w pełni.

Bartosz

2025-09-06

Bardzo solidny blok silnika, który świetnie sprawdził się w mojej maszynie. Regeneracja na wysokim poziomie, wszystko działa bez zarzutu. Polecam!

Benjamin

2025-08-24

I recently purchased a rebuilt engine block for my machine, and I couldn't be happier with the quality. It fits perfectly and has significantly improved performance. Highly recommend for anyone looking to upgrade their equipment!

Jakub

2025-08-06

Produkt spełnia swoje funkcje, jednak warto zwrócić uwagę na szczegóły montażowe. Dobrze wykonany, ale wymaga precyzyjnego dopasowania.

Grzegorz

2025-04-23

Produkt spełnia swoje podstawowe funkcje. Montaż przebiegł bez problemów, a silnik działa zgodnie z oczekiwaniami.

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