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Tractor Pulling Discussion Forum

G flywheel walks

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G-money

05-12-2006 21:25:57




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Just got my john deere G together. it hasn't run much and the fly wheel is already moving toward the end of the crank. the flywheel is bolted on tight. anybody have any ideas?




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Earl-IL

05-13-2006 15:50:59




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 Re: G flywheel walks in reply to G-money, 05-12-2006 21:25:57  
G- money, I set my end play then make a shoulder washer to exact fit. Every crank is different.I use a pilot to drill the hole in the crank straight ,when the crank is in the tractor.We drill them in the lathe on every stroker, just to be sure the flywheel doesn't walk. With your notched cam and rods running close on clearance you don't need that problem of the flywheel walk.Run about 15 min then check your flywheel bolts. Keep a close watch on them they should settle in and the flywheel bolt torque stay the same. If it doesn't you have spline problem. Let us know how you get along.Email if you need help. Earl In Illinois

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DSK

05-13-2006 09:57:35




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 Re: G flywheel walks in reply to G-money, 05-12-2006 21:25:57  
The 5/8's bolt and washer fix seems to be the popular choice to fix this problem, most 2-cyl. strokers I know of are running this. In a perfect world where flywheels & cranks still had perfect splines after 55 years and every stroker crank turned out close to straight, it would not be an issue. If the crank and flywheel are both in NOS condition, it is conceivable that the flywheel would stay put for quite a while if correctly installed and torqued to factory specs. using new bolts and nuts.(275ft. lbs for G). While on the subject, does anyone have experience running a Taper-lock on a stroker crank? I was told by a respected builder-puller that you can't keep them tight.

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G/MAN

05-13-2006 07:33:29




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 Re: G flywheel walks in reply to G-money, 05-12-2006 21:25:57  
What is "tight"? Snugged up good or torqued to specs? Are you using the correct flywheel bolts with the squared heads so they can't turn? If the bolts are not new, have they been overtorqued and stretched at some time in the past? What shape are the splines on the crankshaft and in the flywheel in? Tapping the end of the crank for a bolt and washer to "hold" the flywheel is going to do more harm than good, as once the flywheel walks out against it, you're going to have way too much crank endplay.

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RUSTY G

05-13-2006 09:17:41




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 Re: G flywheel walks in reply to G/MAN, 05-13-2006 07:33:29  
Drill and tap them all the time....have you ever done one and tried it to see if it would work? How many flywheels and crankshafts have you messed with and delt with? Your comments tell the truth about your reality....no clue



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G/MAN

05-15-2006 07:50:04




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 Re: G flywheel walks in reply to RUSTY G, 05-13-2006 09:17:41  
Well, let's see. My '48 "G" has one of those fine drilled and tapped crankshaft, and it didn't seem to do much for it at all. Somebody has still beat the crap out of the end of the crank, the flywheel was cracked out from the bolt holes for the hand-crank adapter and the list goes on and on. Needless to say, it will be fixed and fixed properly so it doesn't look like it just rolled out from under a shadetree. I also have a JD "60" that I've had the flywheel on and off of numerous times, and work on the occasional two-banger here in the shop or when helping friends with their tractors. A couple of good friends of mine, a father and son, own 7 or 8 "G"s between them, from a '37 up to a 700-cube '46 "GM". I've pulled and plowed with several of their tractors, and helped with some transmission work on their "GW" last summer when the tranny was making some noise, which obvious entailed pulling the clutch, reduction cover, flywheel etc. etc. etc. I took my "G" down to the bare main case and am on the way back together with it. Any more questions???

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AW Puller

05-15-2006 20:22:09




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 Re: G flywheel walks in reply to G/MAN, 05-15-2006 07:50:04  
Yes G/MAN, one more question. Does your arm hurt from patting yourself on the back so much?



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G/MAN

05-16-2006 07:29:43




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 Re: G flywheel walks in reply to AW Puller, 05-15-2006 20:22:09  
Not patting myself on the back at all. Simply stating the facts of my experience, after it was called into question. If that's a problem for you, go somewhere else or ignore my posts.



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buickanddeere

05-16-2006 06:58:05




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 Re: G flywheel walks in reply to AW Puller, 05-15-2006 20:22:09  
Why not repair it correctly instead of doing some backyard farmer fix? If you can't afford a new set of grade eight bolts, grade eight tall nuts, hardened washers, cam assembly lube on the threads/washers and a torque wrench that goes to 400lb ft. Or if worse come to worse a taper-loc flywheel. Stay at home and watch TV if you can't keep a couple of hundred pounds of whirling metal under control. Somewhere along the way a crude hack who didn't use a torque wrench or new bolts made a me$$.

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G/MAN

05-16-2006 07:33:10




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 Re: G flywheel walks in reply to buickanddeere, 05-16-2006 06:58:05  
Absolutely. If the splines aren't in good shape, the hardware is crap and it's not put on wrong, all you're doing is putting on a band-aid by putting in a bolt to "hold" it on, and it's eventually going to come to pieces anyway. I can see the bolt and spacer as a safety factor, but if that's the main thing holding the flywheel on, I wouldn't want to be anywhere near the POS.



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JD720

05-13-2006 05:38:08




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 Re: G flywheel walks in reply to G-money, 05-12-2006 21:25:57  
Drill and tap it to 5/8 bolt.Then take the hub and turn the toggles out on a lathe.Hope this helps.



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