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Read articles →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.
This task is due after the first 50 hours, at 300 hours, and every 300 hours thereafter.
Remove the floor matting and access plate from the operator station using a 12 millimeter socket to view and remove the line filter from above.
Using a funnel, add approximately 7.7 gallons of TF-500A hydraulic oil into the fill port, monitoring the sight glass to avoid over-filling.
With the key on and engine off, press the display button until maintenance settings appear, select transmission oil, and confirm the reset, then repeat for hydraulic filters.
