How do you get this slipclutch off??

   / How do you get this slipclutch off?? #1  

kebo

Elite Member
Joined
May 16, 2006
Messages
2,910
Location
Lexington, SC
Tractor
2001 John Deere 790 4x4, bar tires
I loosened the nut thinking that it would let the yoke slide off, but then realized it's not "split" so it can clamp down on the PTO shaft. Duhhhh. Does that "threaded pin" sit in a groove on the PTO shaft? If so, then that pin has to be pushed or pressed out from the other side, right? There is no nut on the other end of it, it just looks like its flush (pressed) into the clutch housing. I couldn't rotate the shaft to take a pic of the other end because the blades are sitting on the ground (rototiller not hooked up to the tractor). Thanks....




20130302_095038.jpg
 
   / How do you get this slipclutch off?? #2  
Is that a nut? It looks like a push pin release. It should push in almost flush and then the collar can slide off the shaft.
larry
 
   / How do you get this slipclutch off?? #3  
I loosened the nut thinking that it would let the yoke slide off, but then realized it's not "split" so it can clamp down on the PTO shaft. Duhhhh. Does that "threaded pin" sit in a groove on the PTO shaft? If so, then that pin has to be pushed or pressed out from the other side, right? There is no nut on the other end of it, it just looks like its flush (pressed) into the clutch housing. I couldn't rotate the shaft to take a pic of the other end because the blades are sitting on the ground (rototiller not hooked up to the tractor). Thanks....




View attachment 306141
Still looks like the bolt goes thru the splines on the shaft(unless it's an optical illusion from the picture angle).

EDIT: try putting the nut back on, flush with the threads, and tap it a few times to see if it backs out the other side.
 
   / How do you get this slipclutch off?? #4  
Just were did you take a nut off of? Larry has it right, it's a spring pin. If it had a nut on it someone put it on just to keep it locked in place, doesn't even look like a nut could be put on it.
 
   / How do you get this slipclutch off?? #5  
This is NOT a quick-disconect push pin.
It is a wedge shaped pinch bolt that engages a slot in the shaft. Put the nut back on, flush with the end of the 'pinch bolt'. Using a steel punch of at least 1/2" diameter so as not to deform the bolt or nut, give it a good lick with a 2 lb or larger hammer straight in towards the clutch. This will dislodge the tapered bolt. Pull the bolt back out towards you so the bolt locks slightly and temporarily in the clutch while you remove the nut. Shove the bolt through and out the back side of the clutch. Remove clutch assembly from the shaft.
 
   / How do you get this slipclutch off?? #6  
Yup, it's a simple threaded bolt that should tap right out. The other end is a conventional hex head. It would be more easily removed if the implement was actually mounted on the three point, and the PTO shaft connected to the tractor. That way you can rotate the tines to minimize the forces that are currently holding that bolt in place. Lot less potential for thread damage that way. Or else just bang it out and replace it with a new bolt

//greg//
 
   / How do you get this slipclutch off??
  • Thread Starter
#7  
This is NOT a quick-disconect push pin.
It is a wedge shaped pinch bolt that engages a slot in the shaft. Put the nut back on, flush with the end of the 'pinch bolt'. Using a steel punch of at least 1/2" diameter so as not to deform the bolt or nut, give it a good lick with a 2 lb or larger hammer straight in towards the clutch. This will dislodge the tapered bolt. Pull the bolt back out towards you so the bolt locks slightly and temporarily in the clutch while you remove the nut. Shove the bolt through and out the back side of the clutch. Remove clutch assembly from the shaft.

Yep, I knew before I even started that it was not a simple push pin type locking mechanism, that would have been too easy! (Use Control and the + key to zoom in and see the threads). I had also figured it was sitting in a "groove" that is in the PTO shaft, which is what keeps the slipclutch from coming off.

The other end of this bolt is not an exposed hex head, but rather was simply rounded and flush with the slip clutch housing (ie recessed, countersunk ever how you want to say it).

I did actually put the nut back on and try driving this bolt through, but it was a feeble attempt because the cover directly above it was in the way and I couldn't get a straight enough angle on it to do any good. I think I will have to hook this rototiller up so I can lift it and then rotate the main shaft to get this bolt in a better position so I can drive it out. Thanks guys!
 
   / How do you get this slipclutch off?? #8  
Yes your right after a closer look, it's a bolt.
 
   / How do you get this slipclutch off?? #9  
Still looks like the bolt goes thru the splines on the shaft(unless it's an optical illusion from the picture angle).

EDIT: try putting the nut back on, flush with the threads, and tap it a few times to see if it backs out the other side.

My money is on Don's advice. Put the nut back on to protect the threads and give it a few light raps.
 
   / How do you get this slipclutch off?? #10  
My money is on Don's advice. Put the nut back on to protect the threads and give it a few light raps.

Gonna take more than "a few light raps". One well placed direct blow is required to unseat the tapered pinch bolt without distorting the bolt or nut.
Not my first rodeo.
 
 
 
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