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Allis Chalmers Discussion Forum
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AC 14

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Tim

08-31-2003 14:37:24




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I am looking at a '60 d-14. Do they have live PTO (operate independent of the clutch)? What is the lever on the right side of the transmission case, (30 -36 inches with a button on top) ?? looks like a hand clutch or a two-speed trans?? Looks like a real nice tractor...I grew up with jds so i am unfamiliar with ACs. Any help will be appreciated.




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DanD.

08-31-2003 18:35:09




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 Re: AC 14 in reply to Tim, 08-31-2003 14:37:24  
The lever on the right side is the power director. Forward is high range, middle is neutral giving you live PTO and hydraulics, back is low range. THe power director clutch runs in oil and can take considerable abuse. It can be shifted under load. Also, unlike some other brands of tractors, it will hold back when in low range. Pushing in the foot clutch stops the PTO and hydraulic pump. You need to use the foot clutch to change gears in the transmission. Having grown up on JD, you should have any problem with the hand clutch!!! LOL

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Tim

09-01-2003 07:16:52




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 Re: Re: AC 14 in reply to DanD., 08-31-2003 18:35:09  
Thanks for all the responses, they have been helpful. DanD, just for further clarification, the power director will hold back a load in high range or low range??
I can move from a standstill by moving the power director from neutral slowly to either high range or low range position??
Thanks



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DanD.

09-01-2003 07:24:28




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 Re: Re: Re: AC 14 in reply to Tim, 09-01-2003 07:16:52  
Yes to both questions.



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JMS/MN

08-31-2003 21:08:09




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 Re: Re: AC 14 in reply to DanD., 08-31-2003 18:35:09  
What do you mean when you say- unlike on other tractors, it will hold back when in low range? Everything else you explained is correct, but I don't understand the comment about holding back.



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Jeff(SW Mi)

09-01-2003 03:36:29




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 Re: Re: Re: AC 14 in reply to JMS/MN, 08-31-2003 21:08:09  

On a Farmall with a turque amplifier,you slow down with the TA engaged, unless you are going down hill, then you freewheel. The AC powerdirector is in gear in high or low, will not freewheel.



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Doug in OR

09-01-2003 14:46:08




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 Re: Re: Re: Re: AC 14 in reply to Jeff(SW Mi), 09-01-2003 03:36:29  
I drove an MF50 when I was young, among many other tractors. The multi-power would coast in low range there too. I believe a freewheeling low range wasn't uncommon in many tractors back then.

Yes, the AC Power Director will not coast in low range. Somehow, it never felt natural shifting to a higher gear when I wanted some engine braking.



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JMS/MN

09-01-2003 11:29:50




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 Re: Re: Re: Re: AC 14 in reply to Jeff(SW Mi), 09-01-2003 03:36:29  
It has been many years since I drove a Farmall with the TA, but I don't know about the free-wheeling going down hill. With the D series, you will freewheel if the PD is in the center position (clutch), while in High and Low, there is a direct, positive connection with the tranny gears, so the engine can hold back the load going down hill. Why would the other brands of TA be any different? They were just a clutched low and high range in each of the gears, with no middle clutch position.

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DanD.

09-01-2003 12:49:17




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 Re: Re: Re: Re: Re: AC 14 in reply to JMS/MN, 09-01-2003 11:29:50  
I don't know why the other brands are different. I guess they were a different design, designed by different engineers, built in a different factory, and installed in a different tractor. I guess that's enough reason for them to be different! I know for sure that with the early TA's, such as those found in a Super MTA, if you put it in low while going downhill, you'll find yourself freewheeling. It will pull you ahead under load, but won't hold back one bit. It's just how they are made. Of course the Allis will freewheel with the power director in neutral. Any tractor will if you have the tranny in neutral or a clutch disengaged.

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DanD.

09-01-2003 06:38:14




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 Re: Re: Re: Re: AC 14 in reply to Jeff(SW Mi), 09-01-2003 03:36:29  
Also, like the torque amplifier, I believe you will freewheel in low range on some Olivers and Minneapolis-Molines as well. Maybe other brands, too? I don't know for sure. With the power director, you can put the tractor in low range at the top of a hill with a large load behind to help hold you back. For a person used to the power director, you might think the same was true if you were driving one of these other tractors. However, you'd find yourself basically in neutral with no holdback from the engine at all. Could cause a nasty surprise!

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