As eyebull says and, from what I've seen, most of these types of SSP pistols seem easy to work on. If you wanted to have a go at a quicker, easier fix, if the seals aren't too bad, many pump ups can be revived by working some Crosman Pellgun Oil through the system. Worth a quick go to see if it works. And if it doesn't you've lost very little and know that the reseal is next.