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Overview
This is an official step-by-step maintenance tutorial covering the full transmission hydraulic oil change on the Yanmar YT3, including drain intervals (50-hour break-in, then every 300 hours), exact socket sizes, both filter replacements (transmission and line filter accessed through the floor), the 7.7-gallon TF-500A oil refill, leak checks, and resetting the service indicator on the display. YT3 owners doing their own scheduled maintenance will find it genuinely useful.
Posted by the YANMAR//Academy channel, making this an official manufacturer tutorial with a clear interest in warranty compliance and brand messaging.