Shearng the bolt pin on bush hog with John Deere 990

   / Shearng the bolt pin on bush hog with John Deere 990 #1  

pianokey50

New member
Joined
Apr 28, 2013
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1
Location
Bonaire
Tractor
John Deere 990
Does anyone have any tips on what I could look for with reference to the following: I have a John Deere 990 Tractor. Almost everytime I try to use the bush hog, when I go to engage the PTO, the bolt pin shears. Thanks
 
   / Shearng the bolt pin on bush hog with John Deere 990 #2  
Are you trying to engage at idle speed?
 
   / Shearng the bolt pin on bush hog with John Deere 990 #3  
Does anyone have any tips on what I could look for with reference to the following: I have a John Deere 990 Tractor. Almost everytime I try to use the bush hog, when I go to engage the PTO, the bolt pin shears. Thanks

How worn is the shaft or part the shear bolt fits into . And agreed as Tx Jim suggested to idle engine then increase speed and bush hog increases spin.
Proper sized bolt also not hardened .
ken
 
   / Shearng the bolt pin on bush hog with John Deere 990 #4  
Idle speed is probably the key... But do lift the cutter and look under it in case there is something blocking the blade, like a piece of bent metal. Try to turn the blade by hand. If it doesn't turn freely than it could be frozen for a number of reasons.

But you are probably just engaging it at full rpm.
 

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