John Deere 345 blade clutch issue

[John_in_TN]

Maybe a lost key does explain the repeated breakage. The JD clutches I have seen (with cast-in keys) were all on LX series, and older similar sized machines. Maybe the heavier GT and 300 series do have seperate keys.

 

[tomnky]

Maybe a lost key does explain the repeated breakage. The JD clutches I have seen (with cast-in keys) were all on LX series, and older similar sized machines. Maybe the heavier GT and 300 series do have seperate keys.

The first two clutches I replaced had the key built into the clutch as You describe, I think they(John Deere) probably changed suppliers.

 

[scollins]

Thanks for all the helpful hints. The bearing inside the clutch pulley was very hard to rotate and there was some play in the clutch itself. The washer on the broken bolt indicated rotation of the washer on the tightened bolt.

I replaced the clutch with a new one and so far so good.

FYI
Both new and old clutch assembly had the key in the clutch so all you have to do is align it with key way in crankshaft when installing. Also, while trying to remove the remaining part of the broken bolt, I broke an easy out extractor in the crankshaft. I was fortunate to enlist the help of a master welder who was able to build up the broken bolt with welding rod and then weld a nut to it. I was amazed at the skill required to perform this "miracle".

Thanks again. This is a great web site.

 

[John_in_TN]

Glad you got it all sorted out, and thanks for letting us know what you found.
I agree: a skilled welder can do amazing things!