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730D again. How much runout on flywheel?

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Joe Hartman

01-02-2008 06:09:41




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Guys - I have posted a few weeks ago about a funny noise I am getting when the 730 warms up. Well had it out this am to push a little snow, less than a minute had the nasty noise. Only this time I have the flywheel shroud off. The flywheel has a slight wobble to it. I am guessing since I don"t have dial indicators at home it is .060 ish or more. F-I-T and I have posted discussion with a past repair on this flywheel by previous owner I question the quality, now I really question it. How can I be sure this noise is the flywheel and not a rod knock or govenor case dry of oil? This tractor I bought from original owner with 2800 hrs on the clock now, also had complete $5000 overhaul in the ninties sometime so I hope not the rod. Help Please. Thanks Joe

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Mike M

01-02-2008 06:55:14




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 Re: 730D again. How much runout on flywheel? in reply to Joe Hartman, 01-02-2008 06:09:41  
2800 hours on the clock ,BUT how many times was the clock changed or gone around ?

I found chunks of gears and a gov. weight pin in the oil of my 720 D when changing the oil right after I bought it. Darn thing ticked me off ! so I set out to fix it right ! Torn it down 100%. That's right all the way down. Looked like the exploded view in the parts books around my shop. Took about a year of weekends and evenings after work and $5,000 in parts at 1985 prices so you likely can triple it at todays prices,but now I have a GOOD one.

None of those fylwheels run real true. You should be able to see if it is rubbing anywhere like the starter drive ? If it was loose it should knock all the time not just when warm.Given those tractors ability to run with many many problems even to the point of self destruction, I suspect deeper troubles lie in store.

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Joe Hartman

01-02-2008 07:19:37




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 Re: 730D again. How much runout on flywheel? in reply to Mike M, 01-02-2008 06:55:14  
Mike - Thanks for the quick reply. I know what you mean about running til self destructions. That is what I am trying to avoid. But I lack experience in troubleshooting the horizonal 2 lungers. The hours on this tractor are correct however, as it came from just 5 miles away and was there since new. My father has kept track of it since he was a kid. Stayed on a 180 acre farm its whole life and they had 4 other tractors as well. But I agree dosn't mean it dosn't have major problems. As for the knock, this past fall, while tilling for winter wheat is when the noise developed. At first it only showed up when temp got to 180 degrees. This am got it out of my mildly heated garage at 40 degrees and had the noise RIGHT AWAY. This is my concern now, it has got worse and don't want it to obviously show it's self with self destruction. Joe

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Mike M

01-02-2008 07:49:26




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 Re: 730D again. How much runout on flywheel? in reply to Joe Hartman, 01-02-2008 07:19:37  
Does it have a taper loc fylwheel on it now ? Either way try to pry it at the outer rim and see if it wiggles ( engine shut off )and I'd try to tighten it up and see if the noise changes. I'd also pick up a stethescope and try to listen where the noise is loudest.

If you suspect a rod or wrist pin you can always pull off the valve cover easily and loosen up one injector line at a time and run it and see if the noise goes away. If it does than you found the problem on that cylinder. Disengage the hyd. pump and the pto too and see if that changes anything. Pull off the clutch cover and see if it gets louder. Sometimes a loose fylwheel will actually sound louder on the Right side than the Left. You can take out all the clutch parts and run it too as those aren't needed to balance that engine like other models.

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