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cylinder sleeve removal

Discussion in 'Excavators' started by samsstuff, May 4, 2021.

  1. Dave Neubert

    Dave Neubert Senior Member

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    Mitsubishi I think
     
    DMiller likes this.
  2. lantraxco

    lantraxco Senior Member

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    Nope, 3, 4, 6D95 is Kommie, the S is for "supercharger" or in English, turbo'ed I believe.
     
    Vetech63 and DMiller like this.
  3. bunkclimber

    bunkclimber Well-Known Member

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    last engine I did like this was an Isuzu C240 diesel, it had thin chrome dry liners like these..just take a oxy/acyet welding torch(not a cutting torch) and heat the old liner up in one strip top to bottom and peel it out where its red hot.Then the liner will come out with little effort..might be a good idea to flex hone the bare block lightly and check it for burrs afterwards..then refit the new liner after cold soaking it in dry ice(use a cooler full) for a few hours,spray the block bore with WD40 usually have to tap it into the block with a block of wood and a ball peen hammer..work fast as it expands quickly..make sure you have the liner bottomed into the block,usually there is a ridge on the block deck surface the liner will seat into.Different manufactureres use different designs so your results may vary..set the job up right,have everything ready when seating the new liners.
     
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  4. Tenwheeler

    Tenwheeler Senior Member

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    Different way. Thanks for sharing.
     
  5. jook24

    jook24 Well-Known Member

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    i had mine bored 25 over can go to up 50 dry sleeves cat excavator engine said it was way cheaper to bore it out.
     
  6. Welder Dave

    Welder Dave Senior Member

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    Parent bore can usually be bored. If engine is out boring is usually cheaper. Some debate over boring vs sleeves on engines like Cat 3204's. I had my block bored .010" over using IPD 3 ring pistons and no problems in about 1800 hours. Others think boring and sleeved with standard size pistons is better.
     
  7. John C.

    John C. Senior Member

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    I'm getting a little leery of this thread. The OP has never stated what machine this engine is in nor stated any serial number for the machine or the engine. No photos have been posted and the supposed source of the rebuild kit has never been mentioned.

    I'm getting a little tired of trying to help ghost writers. At this point I'm putting the OP on my do not disturb list.
     
  8. samsstuff

    samsstuff Active Member

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    yep definitly got sleeves, thats not the problem now, tore rest down and crank is killed, gonna have be turned around ten, then after that im lost on how find a over sized bearing, i can find everything on net except a crank
     
  9. samsstuff

    samsstuff Active Member

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    i dont know how do pic, machine is a pc50uu-1 engine is a 3d95s-w-1, now you know, wish i was a ghost, id fart me a imaginary crankshaft, gonna look elsewhere for help.
     
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  10. Tinkerer

    Tinkerer Senior Member

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    The help is here Sam !
    We just needed those details. Without them we may as well fart in a whirlwind. :D
    Have you tried a komatsu dealer ?
    Maybe they would at least give you the part number for it.
    Why not grind the crankshaft and get the bearings from Komatsu ?
     
    Last edited: Jun 8, 2021
    Tenwheeler likes this.
  11. heymccall

    heymccall Senior Member

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    4 & 6 cylinder versions use same bearings.
    20210608_122856.jpg 20210608_122919.jpg
     
  12. samsstuff

    samsstuff Active Member

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    ive tried komatsu, no good, crankshaft is no where, im down now to seeing about getting it welded and ground back to specs, i dont have the resourses to find over sized bearing, ive got the parts list book and the shop manual, part number is 6201-31-1100, ive pretty much memorized the part number
     
  13. heymccall

    heymccall Senior Member

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    New crank is only $4700 UsD from Komatsu.
     
  14. Tinkerer

    Tinkerer Senior Member

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    This is one of several hits on a search.
    komatsu 6201-31-1100.png
     
  15. samsstuff

    samsstuff Active Member

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  16. samsstuff

    samsstuff Active Member

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    im thinking since i already got the rebuild kit with new bearings im just gonna find a shop to build it up and turn it back, worse case is using a differnt motor and building back of it to suit the pump, thanks for the info but thats out of the question.
     
    56wrench likes this.
  17. Tinkerer

    Tinkerer Senior Member

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    Ya, I thought most folks would decline spending that much for a crankshaft. But I didn't know what kind of predicament you were in.
    How many journals were damaged ?
    I would have had it built back up and reground if it were mine.
    You made a good choice. IMHO.
     
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  18. samsstuff

    samsstuff Active Member

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    only one journal and its not terribly bad, but bad enough to have be done, this is going to be a process for sure but itll be oh happy day when i get it back up running
     
  19. heymccall

    heymccall Senior Member

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    How bad can it be to not use up to 1mm oversize bearings?
     
    Last edited: Jun 9, 2021
  20. Tinkerer

    Tinkerer Senior Member

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    You may get lucky and only need a .020 or.030 grind on it.
    Did the bearing spin in the connecting rod ?
     
    56wrench likes this.