Hello to all from a new member. I'm a volunteer mechanic at a warbird museum in Florida, and we have one of these cranes, too, but no manuals. I have a phone call in to "Tippin" , who is the Pettibone parts division. They said they would do some research and call me back.... I would like to share anyhing I find, and ask for help, too.
My first problem is what hydraulic oil to use - we had to drain the main tank and it was pretty milky/dark- would like to add new but it will have to mix with what's in the system... Thanks in advance! Joel McGinley for "vacwarbirds.org"