Hi,
  The plow I have is a model 4240, a 3 bottom 16 trailer plow with hydraulic lift. Information is out there on the plows, but is just slow to accumulate. It seems that there were variations even on the same model, probably changed as an improvement. If you put a request out on the regular web site, there are quite a few folks more knowledgable than me and if you could include pictures that would help even more.
                            Thanks for asking,
                                   Cal