LI13.20-P-049041_Ver_2 PDF

A service bulletin that addresses squeaking noises from the belt drive of vehicles using engine 272 and 273. The document outlines the complaint of squeaking noises due to axial shifting of belt pulleys and guide pulleys. It suggests applying Krytox lubricant to the belt's edges to resolve the issue. The bulletin stresses that other repairs should only be done if there is visible damage to components. It includes procedural steps for applying the lubricant and notes on parts required.