Piston rings / Ø 72 mm / STD / Kubota D902

Piston rings (piston 1G826-21770, head gasket 1G962-03313-D902) with a diameter of 72 mm for tractors and other Kubota machines of the Kubota BX25, Kubota BX2350D, Kubota KX018, Kubota KX41, Kubota KX41-3, Kubota RTV900, Kubota U17, Kubota ZD323 series with Kubota D902 engines.

Piston rings seal the space between the piston and cylinder walls. During combustion of the fuel mixture in the engine chamber, chemical energy is exchanged for mechanical energy, which is why the tightness of these two components is crucial. Another important role of piston rings in an engine is to scrape excess oil from the cylinder walls during piston movement, ensuring proper lubrication. There are three basic types of rings in internal combustion engines:

• sealing rings,
• scraper rings,
• compression-scraper rings.

When replacing the rings, pay particular attention to the order in which they are positioned on the piston. Install the rings in the correct order: the oil control ring first, the compression ring second, and the oil seal ring third.

Dimensions :

• diameter: 80 mm,
• Thickness: 1.50 / 1.50 / 3.00 mm
• nominal size / standard,
• the set contains 3 pcs. of rings, a set for one piston,
• original part numbers: 1G962-21112,
• Comparative numbers:

Engine models :

Kubota :

• Kubota D902.

Tractor models :

Kubota :

• Kubota BX25,
• Kubota BX2350D.

Machine models :

Kubota :

• Kubota KX018,
• Kubota KX41,
• Kubota KX41-3,
• Kubota RTV900,
• Kubota U17.

Lawnmower models :

Kubota :

• Kubota ZD323.

The first signs of piston ring wear include increased fuel consumption, loss of engine oil, loss of power, black smoke from the exhaust pipe of a warm engine, uneven engine operation at idle speed, an unnatural, easily audible sound from the engine area, loss of power, problems with starting the engine. All symptoms should be consulted with a professional service for proper diagnosis and checking the engine for the need to replace the rings or repair the engine.

Magazine : K18 A11 S03

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