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Sure, or preferably carb cleaner. Any petroleum compatible solvent is fine. Usually an air hose will be the main tool of choice. Similar to cleaning/rebuilding a carburetor but bigger pieces that you won't lose under the bench if you drop them.

I remember an issue with my very first bucket truck and the high dollar hydraulic shop said I needed to replace the two cartridges in the boom cylinders. Except the ones they sold me weren't quite right and the boom wouldn't hold position, it sank slowly. I ended up cleaning the old cartridges...