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John Deere Tractors Discussion Forum
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70 starter HELP

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BLinWMi

12-20-2007 14:21:58




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70 lp seems to have developed an appetite for starter nose cones, broke 2 in the last 6 years. I have been told that it is usually caused by being out of time but the tractor is in time. Several questions. First is, where in the world do I find another starter? Or is there a source for new nose cones? Mine has the Delco 1108981 starter. Any ideas what other starters will fit this tractor. My first starter was a different number but not sure what. Second part is, how do I make this thing easier to start and less likely to crunch nose cones. I had hoped that this block was able to have petcocks but no such luck. Will it do alot of good to put on a block heater? I am currently not using the factory tank but a side mounted fork lift tank. Would it make a difference if I was using the factory tank and starting it on the gas valve? I do not recall the situation on when it broke the first time but this time I was trying to start it for the first time in the morning about a week ago. It spit and sputtered for the first 4 or 5 start attempts, and then snap, broke the nose cone and bent the armature shaft. I have never been in the top end of this tractor, just new crank and flywheel, is it possible the valves are out of adjustment, making it do this? The tractor runs great once I get it started, use to use it on the slurrystore manure pump and it would get right down and bark, actually had to watch the temp after 15 minutes. Would adjust the pit gate valve till the tractor cooled down a bit and would run on the pump for hours with no problems. I know the LP tractors are harder to start but this is getting ridiculous, I have a 60 gas that still has the original starter. Any ideas would be greatly appreciated.

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Tom N OK

12-21-2007 05:57:30




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 Re: 70 starter HELP in reply to BLinWMi, 12-20-2007 14:21:58  
What kind of shape is the teeth on the flywheel? If they are sharp out on the ends the starter may be trying to jump over them causing a bind and breaking the nose. Also the wear will probably be in a small area on the flywheel where the starter usually engages. Just something to look for.



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430WLPG

12-20-2007 18:18:49




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 Re: 70 starter HELP in reply to BLinWMi, 12-20-2007 14:21:58  
My 70Lp has most probably the original starter on it, been overhauled several times. It won't turn more than 1 - 2 turns and it's running, You have something wrong, probably the timing like was already said. And I've had mine 18 years and it has a 45W loader and is used to feed cows every day



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buickanddeere

12-20-2007 17:48:05




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 Re: 70 starter HELP in reply to BLinWMi, 12-20-2007 14:21:58  
It's likely kicking back while starting due to too much timing advance while cranking.



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old art

12-20-2007 18:25:41




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 Re: 70 starter HELP in reply to buickanddeere, 12-20-2007 17:48:05  
is it a magneto or distribtor. on a dist. the spark advance could be truble on a mag. the impulse could be a problem



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BLinWMi

12-20-2007 19:26:37




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 Re: 70 starter HELP in reply to old art, 12-20-2007 18:25:41  
It has a distributor, the one that turns half the r's of most 2 cyl. Distributor is driven off a 90 degree gear box from governor. Kind of funny, I have a 45 W on mine also, feed round bales with it when I don't feel like getting the 4410 out.



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