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Massey Harris & Massey Ferguson Tractors Discussion Forum
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PTO Question

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Jeff

08-27-2003 13:52:55




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On my recently purchased MF35 there are three positions for the PTO control, which is located on the left side of the machine. There is a neutral in the middle, the rear pto doesn't move in that position, the upper position says engine pto, and that starts the rear pto to moving. The lower position says "ground pto", and I can't figure out what it's for.

Any help would be really appreciated.

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Doug in OR

08-30-2003 14:36:27




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 Re: PTO Question in reply to Jeff, 08-27-2003 13:52:55  
It was a nice thing to have. If your picker got plugged, you could put the tractor in reverse and the PTO in ground. This would cause the rollers to run backwards, sometimes clearing a clog.

For situations where you always wanted your PTO speed to depend on ground speed, it was useful. It was seldom used this way, though.



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Bill

08-27-2003 14:17:47




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 Re: PTO Question in reply to Jeff, 08-27-2003 13:52:55  
Ground pto is driven by the driveline vs engine. That means if it is engaged when you drive forward, the pto turns. They were used for such things as pto driven rakes and spreaders. I think I am right on this, they turn opposite when you reverse!

Bill



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GrahmUK

08-27-2003 15:19:47




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 Re: Re: PTO Question in reply to Bill, 08-27-2003 14:17:47  
That is correct the term Ground speed means that the PTO rotates relative to the speed the tractor is moving across the land. Used to spread fertilisers onto the ground etc. Where as the engine PTO drives an implement at a constant speed to the engine revs and not the speed across the land.This system was available until the early 1990,s on Banner Lane built Massey tractors.



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Bill

08-27-2003 16:47:14




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 Re: Re: Re: PTO Question in reply to GrahmUK, 08-27-2003 15:19:47  
That's pretty interesting. Any particular late models you can identify that had it?

My MF50 has the ground speed PTO too, but I have yet to use it. From a restoration interest, I have considered buying a 3 pt mounted pto driven rake.

It would be good to know that if my 50 ever gives-up the ghost, I'd like to know what newer models had the ground PTO.

Thanks,
Bill



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kypete

08-28-2003 19:33:56




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 Re: Re: Re: Re: PTO Question in reply to Bill, 08-27-2003 16:47:14  

My 255 has it.I use it with my KD85 German Hay Rake. The engine PTO is too fast for it.



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bob

08-27-2003 21:51:37




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 Re: Re: Re: Re: PTO Question in reply to Bill, 08-27-2003 16:47:14  
MF 165 & 65 had it.



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Jeff

08-27-2003 18:35:47




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 Re: Re: Re: Re: PTO Question in reply to Bill, 08-27-2003 16:47:14  
Thanks for the information. My tractor has the "traco meter" in the center of the dash. On the lower portion where it lists the engine rpm's is a spot where it says "540 pto rpm", or something like that. I suppose that is the speed to maintain to drive the pto at 540 rpm? Is so, which implements are most critical of using that speed?



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Rotten Robert

08-27-2003 19:09:46




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 Re: Re: Re: Re: Re: PTO Question in reply to Jeff, 08-27-2003 18:35:47  
The 540 RPM PTO is the most common on your smaller tractoors.Maintaining the proper RPM's is critical when running a hay baler and even when mowing with either a sickle bar mower or a rotary mower (bush-hog). However when operating a posthole auger you need to use a little judgement as to what works best for the conditions.



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Bill

08-27-2003 19:38:38




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 Re: Re: Re: Re: Re: Re: PTO Question in reply to Rotten Robert, 08-27-2003 19:09:46  
I would add (at least for my diesel) that when I first ran my MF50 with a bush hog, the 540 pto speed per my tach sounded slow. But that's just the way they are meant to run. No wonder these engines last so long.

Bill



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km

08-27-2003 19:07:10




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 Re: Re: Re: Re: Re: PTO Question in reply to Jeff, 08-27-2003 18:35:47  
Standard PTO speed is either 540rpm or 1000rpm. Grinder mixers,hammer mills,grain augers and such need a steady speed,mowers just run it WO. Also 1000pto takes a differant spline shaft.



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GrahamUK

08-28-2003 07:11:30




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 Re: Re: Re: Re: Re: Re: PTO Question in reply to km, 08-27-2003 19:07:10  
All model ranges from the 35's to the 300 series
had the option of ground speed.ie 100. 200, 500.600 and finally the 300. The more popular the 1000 PTO became the fewer ground speeds were produced, plus the introduction of the IPTO ( independant PTO an hydraulic clutch that operated the pto system) which gave the operator a more flexible control of pto driven implements.



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