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Overview
A hands-on walkthrough of a full hydraulic fluid change on a Yanmar YM155D with milky, contaminated fluid. The creator drains the system, removes a rear wheel to access and clean the clogged filter screen, and refills with J20A fluid, noting the cold-climate tradeoff with J20D. Covers drain plug and filter locations, fluid capacity (~4.5 gal), and a parts source for replacement screens. Best for YM155D owners tackling this job themselves, though the creator openly admits uncertainty about properly flushing residual contamination.
Posted by the BD Builds channel, presenting as a hands-on owner working through the job in real time, including acknowledged knowledge gaps.