psgflier
ArboristSite Member
I haven't contributed to this topic before, although I've followed it for a couple of years.
What makes me speak up is Mark's rebuild here.
I just did an 895 last winter, including the gearbox, actually an 895 with a 101 cylinder.
I replaced all the bearings and seals in the saw. All the bearings were easy to find off the shelf. I also got off the shelf seals except for the starter shaft seal. I spent a lot of time looking for that one, and was on the verge of having some custom made when I found an nos seal. I can not find my notes with all the numbers right now, but I''l keep looking.
There are a couple of places in the US that will built seals to custom specs.
The 840 gear box is slightly different than the one from the 1-82. They changed the casting for the auto oiler, so the case half gaskets are different .
I found an nos gasket, and sent one, along with some others to Cheap Chainsaw Parts, I believe that's the right place, in Marysville, Washington.
He has access to a gasket cutting machine to reproduce the gaskets, he may have them available now.
The two bearings on the output shaft are the same, except one is sealed and the other is open, actually, the one on the sprocket side is sealed on the outside and open on the inside, so you can get by with an old seal on that one. Otherwise, considering the cost, not putting new, and bearings for that matter, in at rebuild is penny wise and pound foolish. Many timber fallers used to replace the bearings and seals on their saws every week-end before heading to town.
Carl
As far as seals, I'd use new off the shelf parts over nos if possible, I learned a long time ago not to trust a rubber part more than 10 years old.
