Inspect the harvest assist mechanism regularly for scale buildup and ensure the plunger moves freely. Keep the ice machine properly descaled to prevent resistance during the harvest cycle. How do I install the Scotsman 12306022 Harvest Assist Kit Disconnect power and water supply to the ice machine. Remove front panels to access the evaporator and harvest assist components. Remove the old harvest assist parts, including the plunger and spring assembly. Install the new 12306022 components in the same positions and secure connections. Restore power, run a test cycle, and confirm smooth movement during harvest.