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520 clutch noise

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Pat

06-10-2003 14:42:59




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My 520 has a terrible knock coming from the clutch pully side when I got it cranked. (Has sat for a while) The knock subsides when the clutch is engaged, either moving or out of gear. Any ideas regarding the clutch or (horrors) the crank?? Thanks Pat




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ET

06-11-2003 09:25:39




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 Re: 520 clutch noise in reply to Pat, 06-10-2003 14:42:59  
Make sure your flywheel is tight. My 520 had a knock from the clutch when I first started it that reminded me of a spark knock from timing advanced to far. I pulled the flywheel to get at somthing else and found worn splines in the flywheel and you could not make the flywheel move by hand. I found out a 50 flywheel will work just fine on a 520, The hub is machined off some on a 50 but one washer under the tin nut made up the differents.
Hope this helps.

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Clooney

06-11-2003 03:27:23




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 Re: 520 clutch noise in reply to Pat, 06-10-2003 14:42:59  
Pat, first, make real sure that BOTH the clutch driver [that's the splined cast drive plate in the clutch that�s held on with the big bolt] & the engine flywheel are tight. Either one of those will make a terrible knocking noise that sounds like it's coming from the clutch area.
~If those are both tight you could have a clutch adjusting bolt hitting the clutch cover or [try running with the clutch cover removed] or a bearing problem, or other metal to metal contact.
~If everything is tight, try lifting the clutch pulley up & down to see if it has a lot of play, those 520�s are known to wear the pulley bearing area on the crankshaft�.

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Chuck W

06-10-2003 14:44:30




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 Re: 520 clutch noise in reply to Pat, 06-10-2003 14:42:59  
this is the inner clutch plate...the splines are badly worn and it slaps back and forth....probably need new plate.



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