dequincy

My 187d works pretty well in low range and with the Powershift in 1st. It works OK in 2nd as long as I am not putting much load on it. Once I get to the higher ranges the RPM's remain constant but the tractor slows or stops. I thought it might be the clutch packs in the Powershift but noticed my PTO slow or stops as well. If I am cutting heavy grass or tilling deep hard soil the PTO and forward motion will stop. I don't smell the clutch slipping but that does not mean it isn't. Is there a main pump that may be weak? Any Ideas?

Thanks
DQ

tractor beam

Sounds like the clutch to me. They are sealed in the funnel pretty good in terms of smelling it. Could even be a "wet" clutch. Have you tried to adjust it? At what point in the pedal, does it start to engage?

dequincy

My original hope and wish was the clutch. The actual clutch operation seems good I have adjusted the play and it seems fine. My tractor does not leak oil but am wondering if there may be a bit of oil from the rear main soaking the clutch. I have had the clutch slip on a car and it seems similar but most people say when a tractor clutch goes out it won't move at all. Clutch is cheap and easy. Powershift clutch packs are $$$$$.

Thanks

tractor beam

It well could be something like that. I would say to get a hold of a manual for your machine and see what it has to say on the subject.

dequincy

Have all the manuals.. Says nothing.

chrpmaster

You might want to pm Shartel. he is one of our resident Yanmar experts and can probably help you out.

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winston

I believe the pto is driven thru the main shaft which is not controlled by your power shift clutches. If it is slipping I think it has to be your main clutch. Even tho you have proper pedal adjustment doesn't mean your clutch couldn't be bad.