[AT] Kubota M5700 noise

Tue Aug 11 14:11:09 PDT 2020

Thanks Carl

On Tue, Aug 11, 2020, 4:20 PM <szabelski at wildblue.net> wrote:

> Dave,
>
> Go to the antique-tractor.com website and you’ll find a list of salvage
> yards. As indicated once before, the list has not been updated for some
> time. However, you can still use it to call around in your area and maybe
> find someone who might have the manifold. Check the websites for the yards
> to see if their phone numbers have changed or if they’re still in business.
>
> Carl
>
>
> ----- Original Message -----
> From: Dave Maynard <dave at themaplehillfarm.com>
> To: Antique Tractor Email Discussion Group <at at lists.antique-tractor.com>
> Sent: Tue, 11 Aug 2020 14:14:00 -0400 (EDT)
> Subject: Re: [AT] Kubota M5700 noise
>
> Does anyone know of some tractor scrapyard? Having a hard time finding an
> exhaust manifold for this Kubota M5700. It seems the only one they used
> this engine and they dont use it anymore. I appreciate any help you can
> give me
>
> Dave Maynard
>
> On Mon, Aug 10, 2020, 4:51 PM Dave Maynard <dave at themaplehillfarm.com>
> wrote:
>
> > I just wish we found it before splitting the tractor and sending things
> to
> > the engine shop and buying all the rebuild parts. The real truth wont be
> > known until it's back together and fired up.
> >
> > Dave
> >
> > On Mon, Aug 10, 2020, 2:24 PM Spencer Yost <spencer at rdfarms.com> wrote:
> >
> >> Picture came through fine. Thanks for following up and letting us know
> >> the final resolution. It’s always nice to know how things turn out.
> >>
> >> Glad it was a much easier fix than many of the alternatives!
> >>
> >> Spencer
> >>
> >> Sent from my iPhone
> >>
> >> On Aug 8, 2020, at 8:12 PM, Mike Maynard <mmaynard at rochester.rr.com>
> >> wrote:
> >>
> >> 
> >> Here is the YouTube link of the video -
> >> https://www.youtube.com/watch?v=pMxOofbbJOA
> >>
> >> guess I should have supplied it earlier!
> >>
> >> 99% sure the source of the noise has been located - see attached picture
> >> (if the list allows them....  been many years since I participated much)
> >>
> >>
> >> Mike
> >>
> >> On Sun, Apr 19, 2020 at 6:26 AM Stephen Offiler <soffiler at gmail.com>
> >> wrote:
> >>
> >>> Me neither.  Error:
> >>> Access to r3---sn-vgqsrnek.googlevideo.com was denied You don't have
> >>> authorization to view this page.
> >>>
> >>> On Sun, Apr 19, 2020 at 12:00 AM Mike M <meulenms at gmx.com> wrote:
> >>>
> >>>> Won't load for me Dave.
> >>>>
> >>>> Mike M
> >>>>
> >>>>
> >>>> On 4/18/2020 4:52 PM, Dave Maynard wrote:
> >>>>
> >>>> Will do Mike. I appreciate all the help and interest in helping me
> find
> >>>> a solution to this problem. Many very experienced and knowledgeable
> people
> >>>> on here and I certainly enjoy reading everything and many times
> learning
> >>>> things. We haven't gotten very much further with this due to some
> other
> >>>> pressing things, but will. New injectors made no difference at all.
> Just
> >>>> today however, the guys are working on  a four cylinder version of
> this
> >>>> Kubota  engine and sent me the attached video clip. Sounds very
> similar to
> >>>> my noise. Weak valve spring in the head, see what you all think. If
> you
> >>>> click on this, at the bottom it says "go to link" and it will get you
> >>>> there. Sorry, haven't been on a computer since I retired and just got
> my
> >>>> laptop back from my son who fixed it, so figuring how to get this
> texted
> >>>> video to attach to the email was a chore and not sure if this was the
> way,
> >>>> but it worked! Lol
> >>>>
> >>>> Dave Maynard
> >>>> The Maple Hill Farm
> >>>> Marion, NY
> >>>>
> >>>>
> https://r3---sn-vgqsrnek.googlevideo.com/videoplayback?expire=1587249885&ei=vWabXuqQJ-yPir4PnP2b0Ag&ip=74.69.206.141&id=8e77dec671cecdd0&itag=37&source=picasa&begin=0&requiressl=yes&mh=4G&mm=30&mn=sn-vgqsrnek&ms=nxu&mv=u&mvi=2&pl=23&sc=yes&susc=ph&app=fife&mime=video/mp4&cnr=14&dur=6.153&lmt=1587239101906161&mt=1587242304&sparams=expire,ei,ip,id,itag,source,requiressl,susc,app,mime,cnr,dur,lmt&sig=AJpPlLswRQIhAMem1LR4HFWc9FRrnjAuULSl_8Hct2cwBUMJvVjpSp08AiAKJ78mrFHMS8CdrtzfOAcROoIhrd9w_-3bWHzQSXHX_A==&lsparams=mh,mm,mn,ms,mv,mvi,pl,sc&lsig=ALrAebAwRAIgOvaXXGqqyzob2OV9veVkI84nmv2LSX6Pa1YivEL5jbMCIFnKOojXR0kxcC_cjLU_y9tvAbOImRgjUxXal3_let-J
> >>>>
> >>>>
> >>>> On Sat, Apr 18, 2020 at 1:16 PM Mike M <meulenms at gmx.com> wrote:
> >>>>
> >>>>> Keep us updated Dave, this has been an interesting and informative
> >>>>> thread.
> >>>>>
> >>>>> Mike M
> >>>>>
> >>>>>
> >>>>> On 4/8/2020 12:57 PM, Dave Maynard wrote:
> >>>>>
> >>>>> By the way, not even sure if this has the wrong rod, just been
> >>>>> guessing until we can get it in and apart. I wonder though if there
> could
> >>>>> be residual fuel from an unfinished burn caused by yet unknown
> reason.
> >>>>> Maybe carbon buildup in pre combustion chamber which may cause higher
> >>>>> compression or poor atomization. Maybe Cecil's thought of loose or
> cracked
> >>>>> pre combustion chamber. Unseen crack in the head, causing an improper
> >>>>> mixture, or maybe even a piston pin bearing we missed. Still dont
> know how
> >>>>> soon we can get it inside and apart, as we need to get a place
> ready. Don't
> >>>>> want it apart outside, and this time it could be apart a little
> longer than
> >>>>> the others.
> >>>>>
> >>>>> Dave M.
> >>>>>
> >>>>> On Wed, Apr 8, 2020, 12:46 PM Dave Maynard <
> dave at themaplehillfarm.com>
> >>>>> wrote:
> >>>>>
> >>>>>> The tractor in NY you are referring to IS this tractor. That is a
> >>>>>> post my son Mike made back when we first got it. You may recognize
> him on
> >>>>>> here as Mangus.
> >>>>>>
> >>>>>> Dave M
> >>>>>>
> >>>>>> On Wed, Apr 8, 2020, 11:58 AM ustonThomas Mehrkam <
> >>>>>> tmehrkam at sbcglobal.net> wrote:
> >>>>>>
> >>>>>>> A Google search for  kubota M5700 engine noise  turns up a thread
> >>>>>>> on tractorbytenet about a tractor in new york with exactly the same
> >>>>>>> problem.  Knock piston 5.  You might follow this thread to see if
> there was
> >>>>>>> a solution
> >>>>>>>
> >>>>>>> M5700 'Knock' and other questions
> >>>>>>> <
> https://www.tractorbynet.com/forums/kubota-owning-operating/413832-m5700-knock-other-questions.html
> >
> >>>>>>>
> >>>>>>>
> >>>>>>> M5700 'Knock' and other questions
> >>>>>>>
> >>>>>>> My father picked up a M5700 this weekend. Overall its in nice
> shape,
> >>>>>>> but we have a couple things we are trying t...
> >>>>>>>
> >>>>>>> <
> https://www.tractorbynet.com/forums/kubota-owning-operating/413832-m5700-knock-other-questions.html
> >
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>> On Wednesday, April 8, 2020, 9:36:42 AM CDT, Cecil Bearden <
> >>>>>>> crbearden at copper.net> wrote:
> >>>>>>>
> >>>>>>>
> >>>>>>> I think the possibility of leftover fuel on the piston might be the
> >>>>>>> problem.  Steve O may have figured it out.  It has been many years
> since I
> >>>>>>> did a compression analysis.  Old Dog forgets older tricks thing!!!
> >>>>>>> Maybe you can get an application list for the rod number??
> >>>>>>> Cecil
> >>>>>>> On 4/8/2020 9:11 AM, Dave Maynard wrote:
> >>>>>>>
> >>>>>>> By reducing compression, would ignition take place at the proper
> >>>>>>> time? Would combustion be complete, or would there be leftover
> fuel that
> >>>>>>> could change things on next compression stroke, and maybe pre
> ignite
> >>>>>>> causing the knock?
> >>>>>>>
> >>>>>>> Dave
> >>>>>>>
> >>>>>>> On Wed, Apr 8, 2020, 5:18 AM Stephen Offiler <soffiler at gmail.com>
> >>>>>>> wrote:
> >>>>>>>
> >>>>>>> I just worked out some math.  That engine is 87mm bore x 92mm
> >>>>>>> stroke.  23:1 compression.  Swept volume is .547 liter, giving
> combustion
> >>>>>>> chamber volume of .0238 liter.  Now, what-if the con rod was 1mm
> too
> >>>>>>> short?  That adds .0059 liter to the combustion chamber, now .0297
> liter,
> >>>>>>> which drops compression down to 18.4:1
> >>>>>>>
> >>>>>>> SO
> >>>>>>>
> >>>>>>>
> >>>>>>> On Tue, Apr 7, 2020 at 7:02 PM Doug Tallman <
> dtallman at accnorwalk.com>
> >>>>>>> wrote:
> >>>>>>>
> >>>>>>> The rod being too short can't change injector timing or cause
> >>>>>>> pre-ignition. It would just mean less compression because the
> piston
> >>>>>>> wouldn't come up as far.  Doug T
> >>>>>>> On 4/6/2020 6:24 PM, Dave Maynard wrote:
> >>>>>>>
> >>>>>>> I know the piston is correct as we replaced it. But James makes a
> >>>>>>> good point to ponder, if the rod is too short, it may change
> injector
> >>>>>>> timing.
> >>>>>>>
> >>>>>>> Dave
> >>>>>>>
> >>>>>>> On Mon, Apr 6, 2020, 6:03 PM Bo Hinch <bohinch at gmail.com> wrote:
> >>>>>>>
> >>>>>>> Or the wrong Piston ( too short or tall ) .
> >>>>>>>
> >>>>>>> On Mon, Apr 6, 2020 at 12:40 PM Dave Maynard <
> >>>>>>> dave at themaplehillfarm.com> wrote:
> >>>>>>>
> >>>>>>> Actually, did not check length of connecting rod and its clearance
> >>>>>>> from head at TDC. But it's not traveling to close to the head as
> there
> >>>>>>> would be damage showing. Just have this new concern about the
> wrong rod
> >>>>>>> being put in by mistake, but that would have been short, not long.
> >>>>>>>
> >>>>>>> Dave
> >>>>>>>
> >>>>>>> On Mon, Apr 6, 2020, 1:01 PM Mike M <meulenms at gmx.com> wrote:
> >>>>>>>
> >>>>>>> When you had it apart, did you check all the piston,ring and
> bearing
> >>>>>>> clearances?
> >>>>>>>
> >>>>>>> Mike M
> >>>>>>>
> >>>>>>>
> >>>>>>> On 4/6/2020 11:35 AM, Dave Maynard wrote:
> >>>>>>>
> >>>>>>> No sleeves in this engine. Someone had this engine apart before and
> >>>>>>> #5 had a new piston and rod and bearings. The seller said it was
> his
> >>>>>>> father's tractor since new and never been apart....he lied! There
> was more
> >>>>>>> RTV on oil pan than you could imagine and obviously that piston
> and rod and
> >>>>>>> bearings had been replaced and I thought they had been chasing the
> noise.
> >>>>>>> Unless there was some other reason, but dont know.
> >>>>>>>      My friend and mechanic help has a Jacobson mower he's is
> >>>>>>> rebuilding that has a 4 cylinder version of this motor that appears
> >>>>>>> identical except the number of cyl's. He found the rod to be the
> same
> >>>>>>> except it a tweak shorter by an almost immeasurable amount, maybe
> .005 or
> >>>>>>> .010. Part number is almost the same except last digit and now I'm
> >>>>>>> wondering if that could be someone's mistake. Would shorter rod
> cause
> >>>>>>> preignition? By the way, there is no part number on the rods so
> they would
> >>>>>>> have to be accurately measured.
> >>>>>>>      It's going to be a bit before I can get this back apart again,
> >>>>>>> but hoping to have this fixed in time to plow.
> >>>>>>>
> >>>>>>> Dave
> >>>>>>>
> >>>>>>> On Mon, Apr 6, 2020, 9:08 AM Cecil Bearden <crbearden at copper.net>
> >>>>>>> wrote:
> >>>>>>>
> >>>>>>> That was one of my thoughts, but my experience has been that the
> >>>>>>> liner movement was a double "thud" once on down stroke and once on
> >>>>>>> upstroke.
> >>>>>>> Cecil
> >>>>>>> On 4/6/2020 1:12 AM, k7jdj at aol.com wrote:
> >>>>>>>
> >>>>>>> Cylinder liner loose.  Don't know if this engine even has cylinder
> >>>>>>> liners if it does and that liner is moving you would get click.
> Did you
> >>>>>>> look carefully at the head when you had it off and look for any
> sign of
> >>>>>>> head distress?
> >>>>>>> I would do a compression check as well.
> >>>>>>>
> >>>>>>> Gary
> >>>>>>>
> >>>>>>> Renton, WA.
> >>>>>>>
> >>>>>>>
> >>>>>>> -----Original Message-----
> >>>>>>> From: Roger Moffat <rogerkiwi at gmail.com> <rogerkiwi at gmail.com>
> >>>>>>> To: Antique Tractor Email Discussion Group
> >>>>>>> <at at lists.antique-tractor.com> <at at lists.antique-tractor.com>
> >>>>>>> Sent: Sun, Apr 5, 2020 7:43 pm
> >>>>>>> Subject: Re: [AT] Kubota M5700 noise
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>> On Apr 5, 2020, at 9:59 PM, Dave Maynard <
> dave at themaplehillfarm.com>
> >>>>>>> wrote:
> >>>>>>>
> >>>>>>> Have cracked injector lines one at a time, and it gets quieter on
> #5
> >>>>>>>
> >>>>>>>
> >>>>>>> But only on #5?
> >>>>>>>
> >>>>>>> When you crack the others the engine misses, but the noise remains?
> >>>>>>>
> >>>>>>> I wonder if something about cylinder 5 is somehow different so that
> >>>>>>> the compression is higher, and so it’s igniting (pre-igniting) too
> much
> >>>>>>> before top dead centre in just that cylinder?
> >>>>>>>
> >>>>>>> Eg #5 piston slightly higher than the other 4?
> >>>>>>>
> >>>>>>> Roger
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