Ram and hose replacement is fairly simple with the correct tools, I'll direct you to my cocker tear down thread:
The Guide: A Complete Teardown of a WGP Autococker
It along with many other helpful links to threads and websites can be found in the Autococker Ultimate Sticky at the top of the cocker section page.
Just make sure you map out where each hose goes, or your gun will be all kinds of goofed up. Any more questions just ask. Welcome to the forums
