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Hydraulic oil is not designed for cleaning, nor is any oil. Use a solvent like denatured alcohol. Lube the bearings with a skateboard bearing lube. The base for hydraulic oil is mineral oil. It evaporates too quickly and the additives can leave a residue that attract dirt and may damage the crown and shield in the bearings and the wheels.
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a okorder ... they are not hydraulic bearing pullers, they are not hyd clutches, they are not hyd nuts.
