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Replaced knives and shear bar on a 960 claas classic drum . When wanting to set shear bar now the motors screw all the way to the end bottom out and fuse blows . Wondering what might be the problem. Any help appreciated
 

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Knock sensors? Are they screwing the shear bar in towards the knife or away? I know the first time we changed knives on our 860 we ripped the ends off the knock sensors swinging the anvil down
 

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I guess it’s better than towards the knives. Is your drum bottom clearance too tight? Could be tricking the chopper to thinking the knives are hitting the shear bar. You’d think it would give you some codes unless it’s stuck in backoff mode. Not sure how those machines work ours is a older 900
 
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