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Building the MS460

Post in 'The Gear' started by MasterMech, May 16, 2012.

  1. MasterMech

    MasterMech Guest

    The time has come!

    Awhile back I aquired (freebie!) a MS460 that got in a fight with an F550 and lost. <> The saw was barely a week old from what I understand. It's a total loss except for the cylinder, piston, crank, clutch and a few small items.

    I bought another 460 from flea-bay with a toasted Piston/Cyl but with what looks to be a good chassis to build on. The plan is to carry over as many engine parts as possible, bearings, crank, piston/cyl to this saw and replace the AV buffers and clutch along with other good parts from the donor unit as well. I have new crank seals and gaskets for the build already.

    I am undecided as to keep the finished product or flip it. If I decide to sell it, I wonder how much the broken fin on the donor cylinder will affect value of the finished saw vs. just doing an aftermarket cylinder? I've yet to disassemble the receiving saw so the actual condition of that cylinder is unknown. Power of the OEM Cyl vs. Aftermarket? I welcome everybody's experiences here.

    DSC03687.JPG DSC03689.JPG

    The loser......

    DSC03692.JPG DSC03693.JPG
    The cylinder is like new except for that damn chip.

    DSC03694.JPG DSC03695.JPG
    Next step will be complete disassembly to salvage engine parts.

    DSC03696.JPG DSC03697.JPG

    The willing recipient.
    smokinj likes this.

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  2. lukem

    lukem Minister of Fire

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    If it were me, I'd probably keep it depending on how much profit were to be made.
  3. ScotO

    ScotO Guest

    That chip is meaningless. As for keeping/selling, you run that saw and it'll end up staying with ya!;) I've done many carry-over rebuilds (even re-using gaskets when possible) with great results. The OEM piston/cylinder will be fine, why not do a match-port while you have it torn down? Also a dual port muffler! Might as well, both are very easy mods to that saw! If I was closer I'd help ya with the porting, brother.
  4. smokinj

    smokinj Minister of Fire

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    Easy choice run it, only then will you know if your going to keep it. I had alot of saw's and the 460 is the only one NFS!;)
    ScotO likes this.
  5. ScotO

    ScotO Guest

    MM I see a 'magnum' air cleaner cover on the one saw, is that the bad P/C? See if you can salvage the P/C on it, maybe a re-ring will cure it.
  6. HittinSteel

    HittinSteel Minister of Fire

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    Hopefully the OEM cylinder cleans up. Then just put a Meteor piston in and away you go!
  7. MasterMech

    MasterMech Guest

    I have run a 460 before, on a few occasions. Dropped a 460 Rescue (Our dealership demo saw.... ;lol) through a workbench made from 8x's and a heavy 2x top. He said he wanted it about 18" narrower than it was. That made a lot of guys in the shop :eek:! I certainly had everybody's attention!::-)

    I don't "need" a 460 per say, not with the 034 around. Flipping the saw for a new piece of shop equipment is mighty appealing. I think I would have a harder time parting with the 034!

    Both saws are Magnums. ==c

    Got a brand-new OEM piston in the donor saw.

    Scotty if I keep this thing it very well may wind up being my first foray into porting. Especially if I wind up having an extra cylinder around.
    ScotO likes this.
  8. smokinj

    smokinj Minister of Fire

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    You must be doing lot smaller tree's than me then.
    ScotO likes this.
  9. MasterMech

    MasterMech Guest

    Yeah, I don't get into 50"+ Oak every day. Lot's of 18-24" trunks.
    ScotO and smokinj like this.
  10. MasterMech

    MasterMech Guest

    Ok gang, I have been wrenching on the MS460 again after a long hiatus. Got the "good" crankcase stripped down and ready to split.

    DSC03909.JPG DSC03912.JPG DSC03913.JPG

    Pulling the flywheel, that's Stihl's flywheel puller. You could mess around making one from pressure washer/hydraulic fittings (22mm) but for less than $10 (List price too!) why bother?

    DSC03914.JPG DSC03915.JPG DSC03916.JPG DSC03917.JPG
    This is the crankcase splitter tool. You could fabricate one of these pretty easy if your handy with a welder. I bought this one because it comes with the sleeves for pulling the crank/bearings back into the case as well. I also don't have enough welder to put something that heavy together @ home.
    smokinj likes this.
  11. MasterMech

    MasterMech Guest

    DSC03924.JPG DSC03926.JPG DSC03923.JPG

    DSC03928.JPG DSC03927.JPG
    This is the flywheel side press tool. This one is well worth buying if you do this kind of work. The plates are numbered/drilled for multiple saws and make pressing the crank out of the case half a snap. Also works for pulling the crank/bearing assembly back into the case.
    smokinj likes this.
  12. MasterMech

    MasterMech Guest

    DSC03918.JPG
    I took a pic of the chain brake mech before disassembling it. Even if you have done these saws before, it's a good idea. ;)

    DSC03919.JPG DSC03920.JPG
    There is the clutch side press setup and the case is starting to come apart. :)
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    There is a pesky dowel pin in that hole at the front of the case, if it doesn't start to separate once the rest of the case is 1/8" apart, I drive it back into the clutch side case with a drift punch.
    DSC03922.JPG

    Success!

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    Shop Tip! I lube the pressure screw on any puller/press I use. Saves a lot of wear & tear on the tool.

    DSC03931.JPG DSC03933.JPG

    Pressing the crank out of the ignition/flywheel-side case.

    Everything is in the parts washer now, ready for me to clean. Of course there will be more pictures when it goes back together!
    smokinj likes this.
  13. Boog

    Boog Minister of Fire

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    Coming along there nice, wish I was there to help play with it too. You're just going to have to be the judge as to whether you use all OEM or not once you get everything cleaned up. But I do think the broken fin will make a difference if you sell it. If I was the buyer I would wonder what else might have been damaged during the incident that broke the fin. A for keeping it, the saws that mean the most to me in my hoard are the ones that I did the major rebuilds on. They are also the ones I figure will last the longest since they have just been rebuilt.
  14. MasterMech

    MasterMech Guest

    I have all OEM goodies ready for it. I think I'm going to try to clean-up the "fried" cylinder regardless of whether I use it or not. I might have a solution to make the other, "new" cylinder look better. >>

    DSC03946.JPG
    A comparison shot of the old "fried" cylinder on the left vs. the donor jug on the right.
    smokinj likes this.
  15. MasterMech

    MasterMech Guest

    DSC03936.JPG DSC03937.JPG DSC03938.JPG
    The "press arbor" that is used to install/remove the flywheel side crankshaft bearing. You could use a socket or similar to press the bearing out too. Surprisingly, many of these little tools are very inexpensive. It's the crankshaft pullers, the vac/pressure test kit , and my crankshaft seal puller that were the real $$.

    DSC03939.JPG DSC03940.JPG
    Setup on the press and.... Success!

    DSC03941.JPG DSC03942.JPG DSC03943.JPG DSC03944.JPG DSC03945.JPG
    This is what I wound up with after a good dunk in the parts washer and blowing things out. I'll still wash 'em down with brake cleaner before I paint the case halves. I've never painted a saw before!
    smokinj likes this.
  16. DexterDay

    DexterDay Guest

    Nice....

    If you absolutely have to get rid of it........ :) I have some "stuff" to trade ;)

    If your lookin for smaller Pro Saws :cool:

    Keep at it MM, that's gonna be a fine machine when your done. As Hearth.com Members said, if you run it, your gonna keep it.
  17. lukem

    lukem Minister of Fire

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    I think if you were straight up with the buyer...told them what happened..and that it was repaired by a qualified mechanic with OEM parts it shouldn't be an issue.
  18. MasterMech

    MasterMech Guest

    I've already made up my mind this will be a "for sale" saw. Question is, how long will I keep/run it before I let it go? ;)

    I've got it in my head that I want newer, lighter, more efficient gear. That means saws with 3-digit model #'s ending in "1". :rolleyes:

    So sometime in the future, the 031, 034, and this MS460 are going to get new homes. Really hate to sell my 034 but 60cc class saws have come a long way in 25+ years. :)
  19. amateur cutter

    amateur cutter Minister of Fire

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    Keep the 460, it'll make the 034 look like a limb saw. A C
    DexterDay likes this.
  20. Boog

    Boog Minister of Fire

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    Wow, one thing that I've done to a saw that you haven't! You just made my day! :p

    I bought a can of the OEM Stihl paint (pricey) to see what it was like, but I plan to take a sample of it over to Lowe's/Home Depot and have them read it with their paint machine to get a cheaper brew for the future! ;)
    DexterDay likes this.
  21. MasterMech

    MasterMech Guest

    Ford tractor gray. Tractor supply. ==c ( I too have the Stihl OEM gray)
  22. Boog

    Boog Minister of Fire

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    That's the final decision that I ended up coming to on mine...........run it this summer cleaning up from the timber sale and lowering some stumps, then send mine to a new home too before it sees any more wear/tear.
  23. loadstarken

    loadstarken Member

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    You can always show the buyer this thread if they have any issues with the chipped fin.

    Thanks for posting this rebuild thread!
  24. Jags

    Jags Moderate Moderator Staff Member

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    Looking good MM. I have never done a saw rebuild. I run Stihl saws and keep them away from vehicles, so I don't have to.;lol
    MasterMech likes this.
  25. MasterMech

    MasterMech Guest

    Unfortunately I couldn't be there to save the donor saw. I'd actually love to find another parts saw or two and see how cheap I could pull one of these animals together. Unfortunately, everything 460 = $$ and I already have "too much" into this one. Oh well. Still going to enjoy the heck outta this thing.

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