Main bearings / STD / Yanmar 3TNE84 / 4TNE84 / 3TNV88 / 4TNV88 / Yanmar EF352T / EF453T / F18 / F20 / F22 / F24 / FX24

Standard size (STD) crankshaft main bearings , 20 mm wide, 1.90 mm thick and with an inner diameter of approximately 51 mm for Yanmar tractors of the Yanmar EF352T, Yanmar EF453T, Yanmar F18, Yanmar F20, Yanmar F22, Yanmar F24, Yanmar FX24 , Yanmar 3TNE84, Yanmar 4TNE84 , Yanmar EF352T, Yanmar EF453T series with Yanmar 3TNV88, Yanmar 4TNV88 and other engines.

Main engine bearings are semicircular rings that are mounted in special grooves (holders) in the engine block, between the crankshaft (main shaft) and the engine block (applies to the central shaft journals) in order to eliminate play that occurs during engine operation. Main bearings, bearing the shaft, ensuring the proper position of the shaft relative to the engine block so that the generated power is transmitted as smoothly as possible.

Dimensions ;

• inner diameter: 51 mm,
• width: 20mm,
• thickness: 1.90 mm,
• original part numbers: 129001-02931,
• reference numbers: AM875371, MB-9150, 129150-02800, 729150-02800,
• part numbers: 6-07-100-20.

Tractor models:

Yanmar:

• Yanmar EF352T,
• Yanmar EF453T,
• Yanmar F18,
• Yanmar F20,
• Yanmar F22,
• Yanmar F24,
• Yanmar FX24.

Engine models :

Yanmar:

• Yanmar 3TNE84,
• Yanmar 4TNE84,
• Yanmar 3TNV88,
• Yanmar 4TNV88.

The first signs of wear of the main bearings are an unnatural, steady knocking coming from the engine. Worn bearings must be replaced with new ones as soon as possible, replacing the faulty element too late can cause serious damage to the shaft, connecting rod or engine.

Magazine : M01:D52:S03

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