Kubota 15221-21111 Piston Kit Assembly

This piston kit is engineered for Kubota Z750, Z650, and Z751 three-cylinder diesel engines. The kit comprises three aluminum alloy trunk pistons manufactured to standard bore diameter of 76 mm, hardened piston pins, retaining snap rings, connecting rod small-end bushings, and a full complement of compression and oil control rings. The assembly restores factory compression ratios and combustion chamber geometry. It serves as a direct interchange for Kubota OEM part number 15221-21111. Applications include Kubota L1500, L1501, L175, and L185 compact utility tractors equipped with the Z750 power unit. Each component undergoes dimensional inspection to ensure proper ring end-gap clearance and pin fitment within OEM tolerance bands.