I just purchased am 1986 Sea Ray Monaco 207 and the trailer brakes are non-existent. Trailer has tandem axle surge brakes. The actuator can be operated by hand, no fluid in it, and everything is all rusted up. It just slams open and shut when I pull it. The shock absorber is also shot. No brakes at all. Guy I bought it from has had it for 5 years and has never used the brakes on it. I was just going to replace the actuator, but I don't even know where to begin. I don't even know if I can since this thing is welded on. Any ideas?