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  1. #1

    Default 1989 JD 955 engine

    We think the engine is shot. Possibly a bad piston or rings.
    Are parts availble to do a rebuild? Might do a compression test to see.
    It does run but has a miss and is low on power. Are replacement engine availble or maybe a repower with kubota engine?

  2. #2
    Platinum Member joecdeere's Avatar
    Join Date
    Apr 2002
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    609
    Location
    Cumming,Georgia

    Default Re: 1989 JD 955 engine

    Parts should all be available, but to do it right is gonna hurt, If I remember right there are short blocks still in stock, but you will be tying some serious money up in the repair

  3. #3
    Veteran Member irwin's Avatar
    Join Date
    Feb 2007
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    1,279
    Location
    SE Conn
    Tractor
    2004 Kubota L35TLB, '89' Cub Cadet 1541

    Default Re: 1989 JD 955 engine

    Quote Originally Posted by KELLHAMMER View Post
    We think the engine is shot. Possibly a bad piston or rings.
    Are parts availble to do a rebuild? Might do a compression test to see.
    It does run but has a miss and is low on power. Are replacement engine availble or maybe a repower with kubota engine?

    There could be other reasons for misfiring and lack of power. First do the diagnosis, then do the repair. Yes do a compression test, and if necessary do other tests. Check it over carefully.

    contaminated fuel, dirty fuel filter, fuel delivery problem, bad/dirty injector(s), injector pump timing, weak injector pump, timing chain/gear issue, worn/burnt valve(s), blown head gasket(a little coolant getting into a cylinder)etc.(what else am I missing guys?)

    How many hours on the engine?
    .....Tim

  4. #4
    Elite Member dfkrug's Avatar
    Join Date
    Feb 2004
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    4,461
    Location
    NorCal
    Tractor
    05 Kioti CK30HST w/ Prairie Dog backhoe

    Default Re: 1989 JD 955 engine

    Quote Originally Posted by KELLHAMMER View Post
    We think the engine is shot. Possibly a bad piston or rings.
    Are parts availble to do a rebuild? Might do a compression test to see.
    It does run but has a miss and is low on power. Are replacement engine availble or maybe a repower with kubota engine?
    I have rebuilt 3 of those engines, using 0.5mm oversize pistons. A few years
    ago, they were a bit over $100/hole for the piston/ring set from JD. If
    you have a broken piston, I have some spares if you don't need oversize.
    I am about to do a JD4300.

    Forget about a new engine from JD, unless you find a 3TNE84RJ in old
    stock at a dealer somewhere. I looked for one when I started my first
    955 rebuild and I found a dealer who had one....for $5300!

    As for replacing the engine with a non-JD, that is a very doable project,
    since the 955 has a full frame and no bell housing betw the engine and
    tranny. Only a bare drive shaft with no clutch. I considered subbing one
    of my bad engines with a gas Honda engine I happen to have. Also, the
    955 has its hyd implement pump on the back end, rather than on the engine.
    See my TBN projects at:
    http://mysite.verizon.net/resyfcgt/

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