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John Deere Tractors Discussion Forum
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Installing a New flywheel on a John Deere 70

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jlow

01-25-2005 08:20:46




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I was just wondering if any one had any tip for putting on a new taper lock flywheel on a John Deere 70 diesel.




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Mike M

01-25-2005 16:15:48




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 Re: Installing a New flywheel on a John Deere 70 in reply to jlow, 01-25-2005 08:20:46  
First I would get a service manual an I & T will work and pull apart and check the thrust washers and the slinger assembly.File any burrs off of the crank too. Proper order of installing the parts in there is very important,sometimes they are not right when you pull one apart because someone may have put the wrong parts in.If it ran much with a loose fylwheel it could of knocked out the thrust washers that control end play. After that is all straightened out take some blocks and place between the right hand tire and the end of the crankshaft inside the belt pulley,you may also need a long board going from the tire up to the front end area so you can tie it to the frame and push the crank over to the LEFT to hold it in place. The center sleeve in the flywheel should have a mark on the end to match up with the V mark on the crank for balance. Unscrew the large square nut on the sleeve and remove it from the flywheel if your tractor has a slinger make sure you have a square headed set screw in the back of the sleeve to drive the slinger.Line up the V balance marks and slinger drive pin and push/tap the sleeve onto the crankshaft until it bottoms out.I put a little neverseez on the outside tapered part of the sleeve then put the flywheel up on make sure it goes on so the balance marks are in the right spot.Put on the big nut and you will need about a 4 foot pipe wrench tighten up the nut have someone hold the flywheel with a crowbar in the ring gear teeth so it doesn't turn.Once you have it tight take a sledge hammer and tap/hit the heavy web in the flywheel center ONE HIT then try to tighten some more you should get more at this point keep hitting ONLY ONCE and tightening you should feel it get to a point where you can't get anymore movement on the wrench.I just use normal force (for a 4 foot wrench)and I don't think I use as big a hammer or hit as hard as the directions I have read say to but you do feel it tighten up to a point where it doesn't move any more.Double check your end play .005-.010 " remove any blocking and run it.Be sure to recheck it after you have ran it some. Tighten /hit /tighten run it some more and recheck after a good work out.

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Emerald70D

01-25-2005 12:51:37




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 Re: Installing a New flywheel on a John Deere 70 in reply to jlow, 01-25-2005 08:20:46  
jlow...don't know where you purchased your taper-lok, but they should have included installation instructions. If not, I have instructions from Allen Machine Works that makes the taper-loks. Let me know if you need a copy and I could mail it to you. Later.



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Dan in Ohio

01-25-2005 08:58:50




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 Re: Installing a New flywheel on a John Deere 70 in reply to jlow, 01-25-2005 08:20:46  
jlow, I have not had to handle a taper lock flywheel but my advise would be the same. I use a portable 2 ton shop hoist to lift and manuver that flywheel at all times. Just get it lined up correctly and slide it back in place. Use a large hammer and wood 4x4 for persuassion if needed. Tighten with grade 8 bolts or even better a fine tread bolt with tall nuts. A quick search of the archives may direct you more.

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