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Message: <blockquote data-quote="JOK" data-source="post: 12022" data-attributes="member: 260"><p>The drives on the T-190 are lubricated by hydraulic oil. The hub assembly [the bit between the sprocket and the drive motor] does use a small amount of synthetic gear oil in it, if you have a model with drain and filler plugs. You have to remove the sprocket to check this. I have had to replace a couple of hub assemblies and all have had the plugs. [Dont know how long they may have been sitting around though]. The bearings and seals can be replaced without too much drama.</p></blockquote><p></p>