I would first hook a gauge set to it & see if there is any pressure in it. If a gauge set is not available just stick something in one of the service ports & listen for a hiss. It,s similiar to a tire stem. If the comp. seal has been leaking there will be signs of oil around the comp. clutch. It,s not hard to replace the clutch but you must have 2 special tools, one to remove the plate & one to put it on. I don,t know if they are available separatly anymore as they come in a service kit. You might be able to rent one. You may have to take it loose from the mountings & tip it up a bit but you will not have vto disconnect the hoses.
