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#1
09-06-2019, 10:08 PM
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1872 Driveshaft issue
Hello All! My brother has a 1872 that he bought new. Finally he had to do some work on it other than normal maintenance. He pulled the engine to replace a leaking rear seal and when he reinstalled the engine and started it, it ran around ten minutes and started vibrating badly due to both carriage bolts snapping in the coupler on the flywheel. Thought maybe he didnt have them tight enough, got a new coupler and made sure everything was tight and same thing after running around ten minutes. He lives over three hours from me so I cant actually see what it going on. Head said the driveshaft isn't bent. Any help would be appreciated. Thanks, Bill Peden.
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#2
09-06-2019, 10:29 PM
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Something is bent or broke. Can you post some pictures of the shaft and the flex disks?
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1572, 1864 x2, 1810 x2, 1863 & GT1554(Dad's Ole Mowers), 1811,782D, 1872 x2, 782DT(Sold), 3235, 1860, 1772 with 3-point and Turbo.
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#3
09-07-2019, 06:45 AM
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I would think something must be misaligned for that to happen to a new coupler. Did the flex coupler line up pretty easily or was it tough to get bolts aligned? Check the engine mounts. See if the are loose or damaged. When you install it again I would turn by hand and check with a run out gauge before running
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Cooperino 100, 104,125, 126, 2x129's, 804, 1211, 1641
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#5
09-07-2019, 10:55 AM
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Quote:
 Had not thought of that. But yeah. That would certainly do it. You mean like bolted solid together, Right?
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Cooperino 100, 104,125, 126, 2x129's, 804, 1211, 1641
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#6
09-07-2019, 11:16 AM
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#7
09-07-2019, 12:06 PM
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Up to 533 and counting... I give up updating my profile!
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#8
09-07-2019, 12:24 PM
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Quote:
__________________
1572, 1864 x2, 1810 x2, 1863 & GT1554(Dad's Ole Mowers), 1811,782D, 1872 x2, 782DT(Sold), 3235, 1860, 1772 with 3-point and Turbo.
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#9
09-07-2019, 12:32 PM
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Quote:
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2264 with 54 GT deck 1641 AKA Black Jack with a 402-E Haban Sickle bar mower JD317 dump truck BX2670 with FEL
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#10
09-07-2019, 04:08 PM
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I will post pictures of the whole assembly when he gets it back together. I told him maybe leave tunnel cover and side cover off and watch and see what is going on. Probably won't be till next weekend though. Thanks to everyone for all the help. One note, I ask him if he put grease on the end of the axle and on the coupler and he said no. I always put grease on mine and just wondering if that may have any effect putting it together dry.
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