Favorites (0) Store
Call us +48 33 870 42 00

Crankshaft for engine Cummins 3.9 3907803

Cummins 3.9 crankshaft (3907803) – durable engine part ensuring reliable performance and long service life in Cummins-powered machinery and vehicles.

  • Condition: reconditioned
  • SKU: 71856
Ocena 4,7

- +

Product description

Cummins 3.9 Crankshaft – durability and reliability

The crankshaft for the Cummins 3.9 engine (part no. 3907803) is a precisely manufactured component of the piston-crank system, converting the reciprocating motion of the pistons into rotary motion. Its correct operation is crucial for the entire engine cycle. Made from high-quality alloy steel and hardened with precision-ground journals, the shaft offers long service life, excellent resistance to dynamic loads, and minimal wear.

Technical data

  • Total length: approx. 720 mm
  • Main journal diameter: approx. 70 mm
  • Connecting rod journal diameter: approx. 60 mm
  • Weight: approx. 28 kg
  • Material: hardened alloy steel
  • Processing: precision grinding of working surfaces

Application

The Cummins 3.9 crankshaft is used in diesel engines installed in construction machinery, agricultural equipment, industrial vehicles, and generators. It fits the popular B-series engines known for their durability and efficiency. Replacement is recommended when journal wear, excessive bearing clearance, or mechanical damage due to lubrication failure occurs.

Properties and benefits

  • Load resistance – hardened for long-term operation under heavy loads.
  • Precision machining – ground surfaces reduce friction and improve engine performance.
  • Optimized lubrication – internal oil channels ensure even oil distribution.
  • Long service life – robust material and manufacturing technology ensure durability in harsh conditions.
  • Easy replacement – fully compatible with Cummins original specifications.

Specification

Specification Value
name Crankshaft for engine
mark Cummins
type 3.9
part number 3907803
condition reconditioned
total length 720 mm
main journal diameter 70 mm
connecting rod journal diameter 60 mm
weight 28 kg

Reference numbers

List of reviews:

Hubert

2025-10-04

Bardzo solidny wał korbowy, świetnie sprawdził się w moim silniku. Regeneracja na wysokim poziomie, wszystko działa bez zarzutu. Polecam!
Cezary

2025-09-15

Bardzo dobra jakość wału korbowego, idealnie pasuje do mojego silnika. Po regeneracji działa bez zarzutu. Polecam każdemu, kto szuka solidnych części do maszyn budowlanych.
Maciej

2025-06-24

Bardzo solidny wał korbowy, po regeneracji działa jak nowy. Zdecydowanie polecam, świetna jakość w rozsądnej cenie!

Write a review.

See also

Discover our wide range of products

used Crankshaft for engine Perkins 1006 ZZ90087
crankshafts and bearings

Crankshaft for engine Perkins 1006 ZZ90087

Price set Individually

- +
used Crankshaft Genmot 111612117
crankshafts and bearings

Crankshaft Genmot 111612117

Price set Individually

- +
used Crankshaft for engine Deutz BF4M2012 04282290
crankshafts and bearings

Crankshaft for engine Deutz BF4M2012 04282290

684.72 EURNet

- +
used  Deutz 02931880
crankshafts and bearings

Deutz 02931880

Price set Individually

- +
used Crankshaft Navistar International DT466 675591C2
crankshafts and bearings

Crankshaft Navistar International DT466 675591C2

Price set Individually

- +
used Crankshaft for engine Liebherr D924 9880007
crankshafts and bearings

Crankshaft for engine Liebherr D924 9880007

Price set Individually

- +
used Crankshaft Deutz 04502707
crankshafts and bearings

Crankshaft Deutz 04502707

1 062.50 EURNet

- +
used Crankshaft for engine Daewoo D2366
crankshafts and bearings

Crankshaft for engine Daewoo D2366

Price set Individually

- +
used  Volvo 04910711
crankshafts and bearings

Volvo 04910711

Price set Individually

- +
used Thrust ring STD Deutz 02931585
crankshafts and bearings

Thrust ring STD Deutz 02931585

Price set Individually

- +
used Crankshaft for engine Cummins QSB6.7 5301009
crankshafts and bearings

Crankshaft for engine Cummins QSB6.7 5301009

Price set Individually

- +
used Crankshaft for engine Cummins QSB6.7 5301011
crankshafts and bearings

Crankshaft for engine Cummins QSB6.7 5301011

1 062.50 EURNet

- +
Bosch Rexroth parts catalog

Bosch Rexroth parts catalog

More

Check out our offer of hydraulic systems for the popular brand Bosch Rexroth.

Construction Machinery Service

Construction Machinery Service

More

We offer comprehensive support for both stationary and mobile repair of construction machinery.

Hydraulic Pumps and Motors Repairs

Hydraulic Pumps and Motors Repairs

More

Repair and regeneration of hydraulic components: hydraulic motors and pumps.

Combustion Engine Repairs

Combustion Engine Repairs

More

Comprehensive repairs of internal combustion engines: verification, parts replacement, repair, and performance testing.

Construction Machinery Purchase

Construction Machinery Purchase

More

Purchase of excavators, loaders, bulldozers, and dumpers in complete, incomplete, or damaged condition.

Google

Opinion 5/5

Zakupiony komplet siłowników do Liebherr 564 był w doskonałym stanie, zgodnie z opisem i przesłanymi zdjęciami. Obsługa na wysokim poziomie, bardzo profesjonalna i pomocna – rewelacja. Co więcej, w kontakcie z firmą otrzymałem osobistego opiekuna, który zajmował się sprawą od początku do końca, mogłem również liczyć na bezpłatne doradztwo przy montażu. Szkoda, że w obecnych czasach nie spotyka się zbyt wielu firm z tak profesjonalnym podejściem do klienta. Gorąco polecam.

Mateusz Lenart

Google

Opinion 5/5

Współpraca na wysokim poziomie. Firma na 6. Polecam z czystym sumieniem. Na pewno jeśli będę musiał to skorzystam jeszcze raz. Naprawa Pomp hydrauliki Koparka Terex

Kamil Przybysz

Google

Opinion 5/5

Znakomita obsługa. Przyjazny i pomocny personel. Płatność, cło i transport zostały zrealizowane szybko i profesjonalnie.

William L Park

Google

Opinion 5/5

Jestem bardzo zadowolony z naszej współpracy. Dobry zespół, dobra obsługa, dobra cena, dobre części. Dziękuję!

Tiberiu Demeter

Google

Opinion 5/5

Oryginalne części, niesamowicie szybka międzynarodowa dostawa ekspresowa i obsługa na najwyższym poziomie. W przyszłości wrócimy, aby ponownie robić interesy. Dziękuję!

Jinajon

Technical materials

Here you will find texts about construction machinery - technical advice, as well as news and events from the industry.

New Delivery of TRW Parts at Wibako
2025-10-24

New Delivery of TRW Parts at Wibako

See more
Reconstruction of the Deutz TCD2013 L06 2V Engine in the Atlas 520 MH Excavator
2025-10-24

Reconstruction of the Deutz TCD2013 L06 2V Engine in the Atlas 520 MH Excavator

See more
New Delivery of Engine Parts at Wibako
2025-10-23

New Delivery of Engine Parts at Wibako

See more
Renovation of the Cummins QSB6.7 Engine in the Keestrack R3 Crusher
2025-10-23

Renovation of the Cummins QSB6.7 Engine in the Keestrack R3 Crusher

See more
New Bosch Parts Offering at Wibako
2025-10-22

New Bosch Parts Offering at Wibako

See more
Reconstruction of the Liebherr D924 TI-E Engine in the LTM 1220 (NX) Crane
2025-10-22

Reconstruction of the Liebherr D924 TI-E Engine in the LTM 1220 (NX) Crane

See more
Directions
load
Cookie preferences
We use cookies to provide essential website functionality and improve your online experience. You can choose for each category whether you want to accept or reject it at any time.
Essential cookies
Preference cookies
Analytical cookies
Marketing cookies
Uncategorized cookies

Detailed information on how we handle cookies can be found in our Privacy Policy

Consent granted on:
Consent ID: