8N with P.T.O. problem

[Keith Molden]

My neighbor has an 8N that when using the brush hog it works fine in forward gears, but when he puts it in reverse, the P.T.O. stops. Any ideas on this would be appreciated.

 

[GA Dave]

If he'd let the clutch out it may start working. David............

 

[Dunk]

(quoted from post at 21:52:50 12/17/08) My neighbor has an 8N that when using the brush hog it works fine in forward gears, but when he puts it in reverse, the P.T.O. stops. Any ideas on this would be appreciated.

On an 8N the PTO shaft input, before the disengage lever, is hard coupled to the tranny input shaft.

 

[Bob]

"the PTO shaft input, before the disengage lever, is hard coupled to the tranny input shaft"

Let's make that the tranny COUNTERSHAFT.

 

[Dunk]

(quoted from post at 07:28:35 12/18/08) "the PTO shaft input, before the disengage lever, is hard coupled to the tranny input shaft"

Let's make that the tranny COUNTERSHAFT.

I think you may be right there, Bob.

 

[Anonymous-0]

Here is what I think is your neighbors situation. First, on an 8N the PTO is not live, meaning it is not directly engine driven. It is transmission driven (and explains why pushing the clutch shuts off the PTO). Because of the way the 8N is designed, the PTO rotates in the correct direction when in forward gears, but runs backwards in reverse gear.

I bet your neighbor has an overrunning clutch (ORC) between the PTO shaft and the mower. This is a one-way rotation adapter which will allow power to be transmitted in one rotation direction and free-wheeling in the other. This is almost a necessity with the N-series or any tractor with a non-live PTO to prevent the mowers from continuing to drive the tractor forward with the clutch disengaged.

When they put the tractor in reverse, I'm sure the PTO also turns the opposite direction as is normal, but it is not obvious because of the free-wheeling effect of the ORC. Thus they may think the PTO does not work in reverse.

 

[tesmith66]

The 8N PTO runs in reverse when the tractor is in reverse? My 2N doesn't do that. It runs the same direction no matter what gear (even neutral) as long as the PTO is engaged and the clutch is out.

 

[Dunk]

(quoted from post at 12:48:36 12/18/08) It runs the same direction no matter what gear (even neutral) as long as the PTO is engaged and the clutch is out.

I agree!!

Even reverse with the clutch out, it goes the same direction as if I was going forward on my 8N.

 

[Leemo]

If the clutch is out the PTO will run in the same direction whether the tractor is in a forward gear, reverse or neutral. I don't think putting the tractor in reverse will stop the PTO. It doesn't on the 6 8Ns I've owned. I'm thinking the neighbor has misinformed you.

 

[Keith Molden]

I guess I didn't make it too clear before. With the clutch out (in the operating position) and the tractor moving in a rearward (reverse direction) The Power take off quits turning, even tho the clutch engaged and the P.T.O. is also engaged. I too haven't run across this before, I use larger tractors with live P.T.O. to brush hog with so I'm not used to dealing with the 2,9, or 8Ns.

 

[Dunk]

(quoted from post at 22:50:55 12/18/08) I guess I didn't make it too clear before. With the clutch out (in the operating position) and the tractor moving in a rearward (reverse direction) The Power take off quits turning, even tho the clutch engaged and the P.T.O. is also engaged. I too haven't run across this before, I use larger tractors with live P.T.O. to brush hog with so I'm not used to dealing with the 2,9, or 8Ns.

Stomp the handle into "engaged" with yer left heel.

While everything is at a STOP of course.

 

[tesmith66]

Sounds like the shrink collar that holds the PTO shaft bearing in place has slipped. Mine was doing that when I first got it. I pulled the PTO shaft, drove the collar back in place with a chisel and tack welded it. No problems after that.