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Ranse 
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Joined: 11 Mar 2016
Location: Tennessee
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 Topic: D10 ring gear
Posted: 18 Jul 2022 at 10:38pm |
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About 50 percent of the time I try to start the tractor the starter will grind. The only way to get it to stop is to crawl under the tractor with a flat screwdriver and give the flywheel a couple of turns through the hole in the bottom of the bell housing. Then it starts right up. I figure it's a bad spot on the ring gear. What else could it be? I thought the ring gear was replaced a few years ago when I had the engine rebuilt. Could it have striped this soon? The tractor isn't used very much. Anyway, what's the best way to tell for sure without splitting the tractor? Are these aftermarket ring gears like from DJ's good, or should I try to get one elsewhere?
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DiyDave
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Joined: 11 Sep 2009
Location: Gambrills, MD
Points: 53474
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Posted: 19 Jul 2022 at 4:44am |
pull the starter, stick your phone camera (on video) in the hole, and rotate the engine, by jacking up a rear wheel, put tractor in 4th gear. plugs out of the motor to make rotation easier. There is a problem that shows up sometimes, if the wrong starter drive (# of teeth) is used, it can wear the ring gear prematurely... 
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PaulB
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Joined: 12 Sep 2009
Location: Rocky Ridge Md
Points: 4952
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Posted: 19 Jul 2022 at 6:30am |
Converting a 6 volt system to 12 volts is most likely the cause of ruining a ring gear so quick as well as the mix of a 12 volt ring gear to a 6 volt starter gear or vice versa, as Dave mentioned. If your tractor has been converted to 12volts from 6 volts, get your starter properly rebuilt with a 12 volt armature and field coils, or you'll be right back to where you are now in no time. regardless of where you get the ring gear from. Everybody sells aftermarket parts from the same supplier. Also get yourself a proper starter drive to go with the ring gear. A worn gear against a new gear is asking for trouble.
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If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY
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Ranse
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Joined: 11 Mar 2016
Location: Tennessee
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Posted: 19 Jul 2022 at 7:32am |
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The tractor has always been a 12 volt system since new, so that shouldn't be the problem. I've had the starter rebuilt in the recent past. I'm pretty sure they put a new drive on it. I couldn't tell you if it has the right number of teeth or not. I don't know how many teeth the drive is supposed to have. I know DJ's sells two different ring gears for a D10. I don't know which one I need. I figure if I pull mine I will count the teeth before I order one. I will pull the starter and look inside. I would think if the starter in grinding when I pull it I shouldn't have to rotate the engine. The stripped spot should be right there shouldn't it? BTW has anyone ever removed a ring gear and rotated it and reused it? That way the stripped spot will be somewhere else and not in the spot where the engine always stops.
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Fred in Pa
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Location: Hanover Pa.
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Posted: 19 Jul 2022 at 7:53am |
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Match ring gear to starter #
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He who dies with the most toys is,
nonetheless ,still dead.
If all else fails ,Read all that is PRINTED.
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steve(ill)
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Joined: 11 Sep 2009
Location: illinois
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Posted: 19 Jul 2022 at 8:00am |
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Ranse... your right, the engine normally stops in one of two different positions.. Those two spots will show 90% of the total wear. You should see that thru the starter hole.. Thats why you can rotate the crank about 4-5 teeth and it works OK. You can remove the ring and turn it 90 degrees and reinstall, assuming the wear is all isolated to two spots.. Make sure you get a 12v starter gear as mentioned, not the 6v.
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Like them all, but love the "B"s.
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SteveM C/IL
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Joined: 12 Sep 2009
Location: Shelbyville IL
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Posted: 19 Jul 2022 at 8:34am |
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As far as flipping it goes,one edge has chamfered teeth and the other does not. Be ahead to reinstall 90 degrees off like Steve says. Heat makes them move easier but don't use so much you take the tempur out.
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Ranse
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Location: Tennessee
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Posted: 19 Jul 2022 at 12:39pm |
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Well, I removed the starter and inspected the ring gear. There's no doubt about it, there's definitely a bad spot there. I assume the teeth at the other stopping point are in better condition. This would explain why the tractor only fails to start half of the time. In theory, I believe that rotating the ring gear 90 degrees would last just as long as a new one. You would be using the unused teeth. But with that said, I'm not sure if that's the way I will go. I will make that decision later. After looking at the starter gear again I'm not sure if it was replaced or not. The starter gear has more chamfer than the ring gear, but it may have some wear too. It could be a combination of both gears. This is going to make me sound like a moron, but I thought a gear was a gear. What's the difference between a 6v gear and a 12v, and how do you tell the difference?
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steve(ill)
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Location: illinois
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Posted: 19 Jul 2022 at 12:49pm |
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the 6 volt gear has 10 teeth.............. 12v has 9 teeth.
Edited by steve(ill) - 19 Jul 2022 at 12:54pm
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Like them all, but love the "B"s.
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