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Old 06-21-2009, 10:40 PM   #10 (permalink)
JC-jetro
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Join Date: Jul 2006
Location: Kansas
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Default Re: Need advice on NH 1715 PTO Issue

Quote:
Originally Posted by freddvm View Post
Hi JC,
Thanks for your reply. Sorry I do have a single clutch on this tractor.

I do not loose forward motion when the mower quits. It is quite frustrating as several times I have driven quite a ways before I realized the mower was not spinning. It just slowly winds down until the blades are not spinning. In order to get it going again I have to clutch in, stop and cycle to PTO lever a couple of times.

I checked the mower gear box and there is oil in it about 1/2-2/3 of the way up the vertical gear. This mower has a slip clutch I think (2 round plates bolted together at the point where the PTO shaft attaches to the mower?) It all turns very freely when I move the blades or the PTO shaft. That is what makes me think it is the PTO because the PTO shaft from the tractor to the mower stops turning but not rapidly it just seems to loose implusion...so the PTO shaft and blades slowly wind down as I am driving along at the same speed.

Also I did the test you recommended on another post and removed the mower and PTO shaft and I placed the tractor in Neutral and engaged the PTO and truned the tractor engine off. I was easily able to turn the PTO shaft clockwise. When I tried to turn it Counterclockwise abotu 70% of the time it would not turn but 30% of the time I could easily turn the shaft counterclockwise. So does that tell you anything?

Thanks!!
Fred
Fred,

The fact that tractor does not slow down when you lose pto suggests your main clutch is probably okay,

When you tested your pto, did you have clutch in or out?

No matter what with internal one way clutch pto shaft will turn CCW just fine. With clutch out it will rotate easily and with the clutch in pto rotates if you have clutch slippage.

You do have slip clutch on your cutter. if It is loose you may not transfer power to cutter head but Main pto shaft before clutch should maintain the same speed.

important question: when you realize the pto slowed down/quit woorkingm would you notice the pto engagement shaft (stick) is jumped out of engaged position? what do you do to get it work again? There is a dtent ball and spring that keeps the pto in engaged position, if that slips cause the disengagement of the pto.

If you have pto ORC (over running clutch) issue , then I'd think it'll be working or not, nothing in between.

I'm hoping that your pto just jumps out... a simple bungee cord to keep the pto engagement shaft may be simple short term solution.


JC,
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