Yanmar cooling system thermostat 71*C 44 mm 4TNV88 3D84 4D84 4D88 3TNV84 3TNV88 4TNE88 4TNV84
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  • Yanmar cooling system thermostat 71*C 44 mm 4TNV88 3D84 4D84 4D88 3TNV84 3TNV88 4TNE88 4TNV84
  • Yanmar cooling system thermostat 71*C 44 mm 4TNV88 3D84 4D84 4D88 3TNV84 3TNV88 4TNE88 4TNV84

Thermostat / Ø44 mm / 71°C / Yanmar 3D84 / 4D84 / 4D88 / 3TNV84 / 3TNV88 / 4TNE88 / 4TNV84 / 4TNV88

Product code: 129155-49801
Brand 4FARMER
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29 people purchased this product
zł64.23 netto
zł79.00
Includes VAT 23%

Lowest price from 30 days: zł79.00

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Product description

Thermostat for Yanmar tractor, dimensions 44 x 56 mm, opening temperature 71°C, fits Japanese Yanmar tractors.

What is a tractor thermostat?

The coolant thermostat is one of the most important components of the cooling system and is responsible for controlling and regulating the temperature of the coolant. The thermostat is a device that operates under the influence of increased temperature, and its correct operation allows maintaining the correct temperature needed for the most efficient operation of the engine. When the temperature of the coolant rises to a certain level, the thermostat "opens" under the influence of heat, allowing the coolant to pass to the second circuit (radiator), which allows for effective cooling of the fluid, and further on the engine.

First signs of a faulty thermostat?

Engine overheating or very long engine warm-up to the appropriate operating temperature are the most visible symptoms of thermostat damage. Thermostat failure in the closed position causes engine overheating and is very dangerous for the engine, therefore after the coolant temperature warning light comes on, you should stop work as soon as possible and turn the engine off. A less dangerous situation is when the thermostat fails in the open position because water circulating in a large circuit affects the engine's failure to heat up and this is a failure less dangerous for the engine, but in the long run it also has an adverse effect and is harmful to the engine.

Dimensions:

  • Collar diameter: 44 mm.
  • Height: 56 mm.
  • Opening temperature: 71°C.

Engine:

  • Yanmar 3D84,
  • Yanmar 4D84,
  • Yanmar 4D88,
  • Yanmar 3TNV84,
  • Yanmar 3TNV88,
  • Yanmar 4TNE88,
  • Yanmar 4TNV84,
  • Yanmar 4TNV88.

Tractor models:

  • Yanmar EF312T,
  • Yanmar EF230T,
  • Yanmar EF230,
  • Yanmar EF230H,
  • Yanmar EF324,
  • Yanmar EF326,
  • Yanmar EF326V,
  • Yanmar EF328,
  • Yanmar EF328V,
  • Yanmar EF330,
  • Yanmar EF334,
  • Yanmar EF338,
  • Yanmar FV-230,
  • Yanmar FV-250,
  • Yanmar FV-270,
  • Yanmar EF352T,
  • Yanmar EF352,
  • Yanmar EF235T,
  • Yanmar EF233T,
  • Yanmar EF233,
  • Yanmar EF235,
  • Yanmar EF233H,
  • Yanmar EF235H,
  • Yanmar EF330V,
  • Yanmar EF334V,
  • Yanmar YT235,
  • Yanmar AF342,
  • Yanmar EF453T,
  • Yanmar EF338V,
  • Yanmar EF342J,
  • Yanmar EF342VJ,
  • Yanmar EF453,
  • Yanmar YT347,
  • John Deere 2036R,
  • John Deere 3038E,
  • John Deere 3203,
  • John Deere 3520,
  • John Deere 3720,
  • John Deere 4105,
  • John Deere 2032R,
  • John Deere 2038R,
  • John Deere 2720,
  • John Deere 3025D,
  • John Deere 3025E,
  • John Deere 3033R,
  • John Deere 3035D,
  • John Deere 3320,
  • John Deere 4700,
  • John Deere 4710,
  • John Deere 4049M,
  • John Deere 4049R,
  • John Deere 4005,
  • John Deere 4044M,
  • John Deere 4044R.

Comparison number:

  • 129155-49801,
  • YM129155-49801.

Magazine: M01:F83:S02

*Photos are for illustrative purposes only and may differ in detail from the delivered product due to differences in production over the years.

Specifications

Condition
New
Engine model
Yanmar 4TNV88

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Questions & Answers

Why is regular filter replacement (oil, air, fuel) crucial for a mini tractor?

User
Ekspert Traktor.com.pl – Doradca techniczny • 17.02.2026
Regular filter replacement is the easiest way to extend the life of an engine from brands like Kubota or Yanmar. The oil filter removes metallic contaminants generated during operation, the air filter protects the cylinders from field dust, and the fuel filter prevents water and dirt from damaging the precision injection system. We recommend replacing filters every 50-100 operating hours or at least once per season to ensure optimal engine performance.

How to properly select and sharpen mower blades for a Japanese tractor?

User
Ekspert Traktor.com.pl – Doradca techniczny • 17.02.2026
When selecting mower blades, consider the mower deck model and the blade length and center bore diameter. Maintaining blade balance is crucial when sharpening – an unbalanced blade causes vibrations that damage the hub bearings. Remember that sharp blades mean healthier grass, a cleaner cut, and less strain on the engine of your Iseki or Mitsubishi tractor.

How to identify the correct V-belt size and how to care for it?

User
Ekspert Traktor.com.pl – Doradca techniczny • 17.02.2026
It's best to read the markings on the side of the old V-belt. If they are illegible, measure the belt width and its outer length (La). On Shibaura and Hinomoto tractors, it's important to regularly check the belt tension – too loose a belt will cause slippage and faster wear, while too tight a belt can cause alternator or water pump bearing failure.

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