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  1. #1
    Silver Member
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    Jul 2004
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    109
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    Lincoln County, Missouri
    Tractor
    '51 Ford 8n

    Default How to remove a ring gear from an 8n flywheel

    I need to replace my ring gear on on my 8n.
    I know to put the new gear on I'll put the ring gear in the oven and the flywheel in the freeze, but how do I get the darn thing off? Brute force or are there any easier tricks?

    Thanks
    -dave

  2. #2
    Member
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    May 2005
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    34
    Location
    Pennsylvania / New Jersey
    Tractor
    Kubota / BX23

    Default Re: How to remove a ring gear from an 8n flywheel

    Hi Slapshot,
    I would try to heat the old gear with a o/a torch and knock it off. Try to keep the heat concentrated on the gear it self and do not let the flywheel become to hot. You have to be quick else flywheel will expand to much. I guess you could try cutting a slot in the gear with a grinder or very gently with the torch and pop it off to.
    Glenn

  3. #3
    Silver Member
    Join Date
    Jul 2004
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    109
    Location
    Lincoln County, Missouri
    Tractor
    '51 Ford 8n

    Default Re: How to remove a ring gear from an 8n flywheel

    I was reading on a couple auto fourms, where they described partially cutting it with a saw/grinder then poping it with a cold chisel.

    I think I'll give that a shot.

    -dave

  4. #4
    Old Timer Soundguy's Avatar
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    Mar 2002
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    ym1700, NH7610S, Ford 8N, 2N, NAA, 660, 850 x2, 541, 950, 941D, 951, 2000, 3000, 4000, 4600, 5000, 740, IH 'C' 'H', CUB, John Deere 'B', allis 'G', case VAC

    Default Re: How to remove a ring gear from an 8n flywheel

    I use a drill bit to drill near thru, then the chissle to split it.

    soundguy

  5. #5
    Veteran Member
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    Aug 2007
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    2,352
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    Wayne County Pa.
    Tractor
    Massey Ferguson model 85, Allis-Chalmers WD-45

    Default Re: How to remove a ring gear from an 8n flywheel

    I've done this literally a hundred times. Place the ring gear on a 5 gallon bucket, so that if the ring gear was loose, it would fall to the ground. Now, heat the ring gear only with a torch, equally, all the way around. Don't stay in one spot, just go around the whole thing kind of slowly. When the ring gear gets hot enough, it just falls right off. Now, flip the flywheel over. Have a hammer ready just in case. Put the new ring gear on the flywheel and do the same process. When the ring gear heats up enough and expands, it will drop on. Sometimes you have to tap one side with a hammer. Very easy process.
    Knowing is not enough, you must apply.
    Willing is not enough, you must do.
    Bruce Lee

  6. #6
    Elite Member
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    Oct 2003
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    3,530
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    the Steernbos (Holland)
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    Zetor 3011, Zetor 5718

    Default Re: How to remove a ring gear from an 8n flywheel

    Quote Originally Posted by Wayne County Hose
    I've done this literally a hundred times. Place the ring gear on a 5 gallon bucket, so that if the ring gear was loose, it would fall to the ground. Now, heat the ring gear only with a torch, equally, all the way around. Don't stay in one spot, just go around the whole thing kind of slowly. When the ring gear gets hot enough, it just falls right off. Now, flip the flywheel over. Have a hammer ready just in case. Put the new ring gear on the flywheel and do the same process. When the ring gear heats up enough and expands, it will drop on. Sometimes you have to tap one side with a hammer. Very easy process.

    I have seen the service guy from the Dutch Ursus tractor importer, do the same trick with my neighbours tractor. It looked very easy.

  7. #7
    Elite Member
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    Oct 2004
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    2,952
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    limerick pa lycoming county pa
    Tractor
    kubota bx23

    Default Re: How to remove a ring gear from an 8n flywheel

    slapshot

    Have you bought the new ring gear?

    I might be frugal but usually motors stop in the same place each time and I have just spun them 120 degrees on the crank holes. Then starter hits in a different place.

    If I have to thake them off.
    I knock the ring gear off with a hammer and brass punch working around fly wheel a little at a time.

    Heat it up to put on.

    tom

  8. #8
    Veteran Member BTDT's Avatar
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    Sep 2006
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    North Texas
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    IH M Farmall-propane powered, H Farmall (father-in-laws), Ford 1300 diesel

    Default Re: How to remove a ring gear from an 8n flywheel

    I think on some of the old Waukesha and Continental engines, you could just flip the ring gear over and re-install. Check to see that the teeth are cut the same on each side, yours may be the reversible.
    Praise is not something you do to get closer to God, praise is a response to God being close to you.

  9. #9
    Old Timer Soundguy's Avatar
    Join Date
    Mar 2002
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    Central florida
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    ym1700, NH7610S, Ford 8N, 2N, NAA, 660, 850 x2, 541, 950, 941D, 951, 2000, 3000, 4000, 4600, 5000, 740, IH 'C' 'H', CUB, John Deere 'B', allis 'G', case VAC

    Default Re: How to remove a ring gear from an 8n flywheel

    Not really on the 8n.. It's not worth the 10$ to reuse it... once you got it off.. yuo might as well put a good one on.

    On an N the starter drive 'sucks in' and engages the ring gear from the trans side anyway..

    soundguy

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