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John Deere 80 troubleshooting

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Ravenwood

08-16-2002 18:13:14




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Once every 20 starts or so, my JD 80 makes a loud grinding/groaning sound. This happens after I have pulled back the Decompression Lever and then go to pull back the Cranking Engine Clutch Lever. However, once I release the Clutch Lever a time or two, and try it again, she turns right over and fires up. Can anyone shed a little light on my problem? Any idea on cost to repair?

Thanks, Ravenwood.

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Clooney

08-16-2002 18:50:01




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 Re: John Deere 80 troubleshooting in reply to Ravenwood, 08-16-2002 18:13:14  
Ravenwood, pull the flywheel cover & see if there is a section on flywheel ring gear teeth that are chewed up, [I'll bet there is]. If so you will either need a new ring gear or turn the old one over, [the flywheel will have to come off & the gear heated & driven off then re-heated & driven on, then the teeth will have to have the chamfer reground on the starting engine side.
~As a "get-by" until you can get it looked at & repaired, you can try [will take three hands, or 2 when you get it figured out] starting the cranking engine & leaving it at the slower starting speed, then decompress, then engage the starter, then after the starting engine is engaged but before releasing the decompression lever reach over & put the starting engine on run, then release the decompression lever [that will engage the starting motor pinion at a slower RPM & it usually won't grind as bad]. I'm not sure how this will work on an 80 but it works good on the 720 & 730 with poor starter pinion engagement & is worth a try on your 80.
~While you have the flywheel cover off & with the starting engine NOT RUNNING, pull the starting lever & see if the starting engine pinion fully engages the flywheel teeth, if not adjust the travel per the book. Also while the cover is off, make sure the flywheel is tight on the crank & the crankshaft end play isn't excessive as that can cause a starter engagement problem also..... .

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