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

Thermostat Komatsu S6D125 600-421-6630

Komatsu S6D125 thermostat 600-421-6630 – cooling system part ensuring optimal engine temperature, durable and resistant to harsh conditions.

  • Condition: used
  • SKU: 44395
Ocena 4,7

14.12 EURNet

- +

Product description

Thermostat Komatsu S6D125 600-421-6630

Description

The Komatsu thermostat with part number 600-421-6630 is a high-quality cooling system component designed for Komatsu S6D125 engines. Its main function is to regulate the flow of coolant to maintain the engine’s optimal operating temperature. Thanks to its precise design, it ensures quick engine warm-up after start and effective cooling under full load. Made of high-strength, heat- and pressure-resistant materials, it provides reliability and long service life even in harsh construction site conditions.

Technical Data

  • Part number: 600-421-6630
  • Application: Komatsu S6D125 engines
  • Type: cooling system thermostat
  • Opening temperature: approx. 82–85°C
  • Material: corrosion-resistant steel, thermo-sensitive elements
  • Mounting diameter: factory-matched for Komatsu S6D125 socket
  • Durability: high resistance to cyclic temperature changes

Application

The Komatsu S6D125 thermostat is used in engines installed in Komatsu excavators, bulldozers, and loaders. It maintains stable operating temperature, ensuring optimal fuel combustion, reduced mechanical wear, and lower exhaust emissions. Using an original or high-quality equivalent thermostat is essential for safe and efficient machine operation.

Properties

  • Precise coolant temperature control
  • Fast engine warm-up after start
  • Stable engine performance under heavy load
  • High resistance to corrosion and chemicals
  • Long service life in demanding conditions
  • Easy installation in Komatsu S6D125 engine socket

Specification

Specification Value
name Thermostat
mark Komatsu
type S6D125
part number 600-421-6630
condition used
opening temperature 82–85 °C
material corrosion-resistant steel
application Komatsu S6D125 engine
mounting diameter factory-matched

Reference numbers

List of reviews:

Emma

2025-09-13

Timothy

2025-09-03

Amelia

2025-06-21

Write a review.

See also

Discover our wide range of products

used  Deutz 04179928
cooling system

Deutz 04179928

Price set Individually

- +
used Fuel line odpowietrzający Deutz 04514127
cooling system

Fuel line odpowietrzający Deutz 04514127

Price set Individually

- +
used Water pump Kubota 16251-73034
cooling system

Water pump Kubota 16251-73034

Price set Individually

- +
used Coupler 11SMn30+C Liebherr 10140969
cooling system

Coupler 11SMn30+C Liebherr 10140969

Price set Individually

- +
used Coolant Pump Hose Kubota 17203-72860
cooling system

Coolant Pump Hose Kubota 17203-72860

28.24 EURNet

- +
used Coupler Deutz 04513280
cooling system

Coupler Deutz 04513280

47.07 EURNet

- +
used EGR cooler elbow for engine Liebherr D846 A7 10012302
cooling system

EGR cooler elbow for engine Liebherr D846 A7 10012302

Price set Individually

- +
used Water pump connector for engine Liebherr D846 A7 9739383
cooling system

Water pump connector for engine Liebherr D846 A7 9739383

Price set Individually

- +
used for engine Liebherr D936 A7 10149699
cooling system

for engine Liebherr D936 A7 10149699

Price set Individually

- +
used Coolant Pump Hose for engine Liebherr D846 A7 10037169
cooling system

Coolant Pump Hose for engine Liebherr D846 A7 10037169

Price set Individually

- +
used EGR for engine Liebherr D846 A7
cooling system

EGR for engine Liebherr D846 A7

70.61 EURNet

- +
used Water pump for engine Liebherr D846 A7 10342871
cooling system

Water pump for engine Liebherr D846 A7 10342871

282.43 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.

Renovation of the Cummins QSB4.5 Engine in the Dressta TD-10R Bulldozer
2026-05-14

Renovation of the Cummins QSB4.5 Engine in the Dressta TD-10R Bulldozer

See more
Engine Overhaul of Liebherr D926 TI-E A4 in Liebherr LTM 1500-8.1 Mobile Crane
2026-05-13

Engine Overhaul of Liebherr D926 TI-E A4 in Liebherr LTM 1500-8.1 Mobile Crane

See more
Repair of the Liebherr D 9408 TI-E Engine in the LTM 1800 Crane
2026-05-12

Repair of the Liebherr D 9408 TI-E Engine in the LTM 1800 Crane

See more
Overhaul of the D926 TI-E Engine in the Liebherr LTM 1050/1 Mobile Crane
2026-05-08

Overhaul of the D926 TI-E Engine in the Liebherr LTM 1050/1 Mobile Crane

See more
Renovation of the Liebherr D9508 A7 Engine in the LR 1300 Crane
2026-05-06

Renovation of the Liebherr D9508 A7 Engine in the LR 1300 Crane

See more
Engine Overhaul of Cummins QSB6.7 in Hyundai HL960 HD Loader
2026-05-05

Engine Overhaul of Cummins QSB6.7 in Hyundai HL960 HD Loader

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: