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

Belt tensioner Cummins 3974102

Cummins belt tensioner 3974102 for QSC8.3 and ISL9 engines. Provides stable belt tension, durability and reliability in construction and industrial machinery.

  • Condition: new
  • SKU: 23111
Ocena 5,0

212.50 EURNet

- +

Product description

Cummins Belt Tensioner 3974102

Description

The Cummins belt tensioner 3974102 is a high-quality drive system component designed for Cummins QSC and ISL series engines. Its role is to maintain proper belt tension, ensuring correct operation of engine accessories such as the alternator, water pump, or air conditioning compressor. With its robust design and durable materials, the tensioner offers long service life and excellent resistance to wear and dynamic loads. Fully compliant with Cummins factory standards, it guarantees reliable performance and safe operation.

Technical data

  • Part number: 3974102
  • Weight: 1.86 kg
  • Dimensions: length 104.9 mm, width 104.9 mm, height 209.55 mm
  • Construction: high-strength steel, roller with bearing
  • Application: Cummins QSC 8.3, ISL 8.9, QSL 9, ISL9 engines
  • Applicable in construction and industrial machinery by Terex, JCB, Tigercat, Hyster, Wirtgen, Dressta and others

Application

The Cummins 3974102 belt tensioner is widely used in engines installed in construction, road, forestry, and agricultural machinery. It maintains optimal tension of the multi-ribbed belt, preventing slippage, misalignment, and excessive wear. By ensuring precise operation, it stabilizes the cooling, charging, and auxiliary hydraulic systems. Commonly used in JCB loaders, Terex dump trucks, Tigercat forestry machines, and Wirtgen rollers and milling machines.

Features

  • Genuine Cummins quality
  • Precision spring mechanism for stable tension
  • High resistance to temperature and dynamic loads
  • Long service life and low maintenance requirements
  • Easy replacement and full compatibility with OEM engines

Specification

Specification Value
name Belt tensioner
mark Cummins
part number 3974102
condition new
weight 1.86 kg
length 104.90 mm
width 104.90 mm
height 209.55 mm

Reference numbers

List of reviews:

John

2025-09-06

Great tensioner! It fits perfectly and works smoothly. Installation was straightforward. Highly recommend for anyone in need of reliable parts.
Artur

2025-09-06

Zamówiłem ten napinacz i jestem zadowolony z jakości. Działa bez zarzutu, a cena jest atrakcyjna. Na pewno wrócę po więcej części.
Dominik

2025-09-06

Bardzo dobry napinacz, idealnie pasuje do mojej maszyny. Montaż był szybki i bezproblemowy. Polecam!
Dawid

2025-07-17

Bardzo dobra jakość, pasuje idealnie do mojej maszyny. Szybka dostawa, jestem zadowolony.
Michał

2025-05-28

Napinacz działa bez zarzutu, łatwy w montażu. Zdecydowanie polecam!
Filip

2025-04-27

Solidny produkt, który spełnia swoje zadanie. Zdecydowanie warto zainwestować w ten napinacz.

Write a review.

See also

Discover our wide range of products

used Distance napędu pompy hydraulicznej Cummins M11 3882902
Drive elements

Distance napędu pompy hydraulicznej Cummins M11 3882902

16.53 EURNet

- +
used Vibration damper Liebherr D9508 9077223
Drive elements

Vibration damper Liebherr D9508 9077223

354.17 EURNet

- +
used Crankshaft adapter Liebherr D9508 9077280
Drive elements

Crankshaft adapter Liebherr D9508 9077280

212.50 EURNet

- +
used Hydraulic pump drive Caterpillar C10 160433
Drive elements

Hydraulic pump drive Caterpillar C10 160433

106.25 EURNet

- +
used Vibration damper screw ISO4017 M10X25 10.9 A3C Liebherr 4066093
used Vibration damper Liebherr D9308 9268059
Drive elements

Vibration damper Liebherr D9308 9268059

212.50 EURNet

- +
used Pulley wału korbowego for engine Liebherr D9308 9271585
Drive elements

Pulley wału korbowego for engine Liebherr D9308 9271585

153.47 EURNet

- +
used Gear Liebherr D9508 9077285
Drive elements

Gear Liebherr D9508 9077285

212.50 EURNet

- +
used Gear Liebherr D9508 9077283
Drive elements

Gear Liebherr D9508 9077283

259.72 EURNet

- +
used Belt tensioner Liebherr D9508 12418349/10044692
Drive elements

Belt tensioner Liebherr D9508 12418349/10044692

129.86 EURNet

- +
used Pulley Cummins M11
Drive elements

Pulley Cummins M11

141.67 EURNet

- +
used Intermediate gear Z=61 Caterpillar C10 9Y5320/9Y3512
Drive elements

Intermediate gear Z=61 Caterpillar C10 9Y5320/9Y3512

153.47 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: