SMD-17 piston, Odessa region.

Piston SMD-17, SMD-18, SMD-21, SMD-22 (22-0305A) Niva, DT-75 (4K)

Piston SMD-22
Catalog number 22-0305А
Application of DT-75,harvesters "Niva", SKP-5A, SK-5A "Sibiryak", SKD-6, "Yenisei-1200"
SMD-17, SMD-18, SMD-20, SMD-22 engine(//tractor-service.com)
Execution only 4K (3 compression rings and 1 oil remover), 2 upper grooves in the shape of a one-sided trapezoid, the third groove is rectangular.
Features: piston bottom with cutouts for valves, piston skirt has 4 cutouts - "crown"
Toroidal combustion chamber (open)
Size groups M, Z, B
Material aluminum alloy AK12M2MgN
Diameter 120 mm
Weight 2.05 kg