Assuming is a Shimano I'd do it the opposite way. Attach fully charged siringe, attach cup and push the old fluid into the cup. Dispose and repeat if necessary.
I’ve pushed loads through but something isn’t right. I wanted to do a full drain, probably new olives as well.
you really want to pull air through the system?
@atz started
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Assuming is a Shimano I'd do it the opposite way. Attach fully charged siringe, attach cup and push the old fluid into the cup. Dispose and repeat if necessary.