Engine Piston / 84mm / Yanmar 4TNV84 / 3TNV84
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  • Engine Piston / 84mm / Yanmar 4TNV84 / 3TNV84
  • Engine Piston / 84mm / Yanmar 4TNV84 / 3TNV84
  • Engine Piston / 84mm / Yanmar 4TNV84 / 3TNV84

Engine Piston / 84mm / Yanmar 4TNV84 / 3TNV84

Product code: 4TNV84 / 3TNV84
Brand 4FARMER
Country of production 4FARMER
View other model
2 people purchased this product
zł179.00
Includes VAT 23%

Lowest price from 30 days: zł179.00

Product description

Engine piston with a diameter of 84 mm designed for Yanmar engines of the 4TNV84 and 3TNV84 series. The set includes a piston, a pin and two circlips. The product is a high-quality replacement, ensuring reliability and long engine life. Ideal for repairs and regeneration of agricultural and construction machines equipped with Yanmar engines.

Dimensions:

  • Diameter: 84 mm.
  • Height: 66 / 84 mm.
  • Pin diameter: 26 mm.
  • Pin hole diameter: 26.05 mm.
  • Distance from end of pin hole to edge of piston: 6 mm.
  • Distance from edge of pin hole to top of piston: 35 mm.
  • Ring groove width from top of piston: 2 / 2 / 4 mm.
  • Index: 4TNV84.

Engine model:

  • Yanmar 4TNV84,
  • Yanmar 3TNV84.

Magazine: M01: A64

*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 3TNV84

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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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