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Allis Chalmers Discussion Forum
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Powerdirector

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Hurst

03-14-2005 08:18:39




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Was there a difference between the hand clutches between the D-series (d17, d19, d21) and the hundred series (esp. 190, 190xt, 200, 210,220). We used to own a d17 with the hand clutch (the lever) and I was wandering if the others used the lever, since this was great for square baling. If not, how do you use the powerdirectors on the later allis chalmers tractors. Also, what is a powershift transmission? Thanks in advance for the help.

Hurst

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Don Dittmar

03-14-2005 09:47:06




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 Re: Powerdirector in reply to Hurst, 03-14-2005 08:18:39  
The D21 did not have a power director, it had a hi/lo, but it was not "shift on the go". the 170 used the same as the d17, but the 180 was hydraulic shift instead of mechanical. the d14-d19 all used the same style, just a little bigger. the 190's will probably be oil shift as well. I dont think the 210, or 220 had a power director as they were designed around the d21.

A power shift trans is set up like a car automatic as it has planetary gears and clutch packs. A powershift allows you to have clutchless shifts through all your gears, i.e. you could from 2nd to 3rd without clutching

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Joe(TX)

03-16-2005 05:33:57




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 Re: Powerdirector in reply to Don Dittmar, 03-14-2005 09:47:06  
Thats funny, The AC literature calls it a power director on the D21 as well as the 180 and 190/200. They used this term for the Hydraulic clutchs as opposed to the high low clutch (mechanical).



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Hurst

03-14-2005 09:56:36




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 Re: Powerdirector in reply to Don Dittmar, 03-14-2005 09:47:06  
There is an auction coming up near my house. It is a "no junk allowed" auction. I was wondering what would be the best tractor for baling (both square and round). We used to have a d17 series 4 diesel, so that was going to be my first choice. What would be better, or around the same. Is there an advantage a 170 diesel will have over the d17, aren't they the same except the 170 uses a perkins and differnet tin. Would a 190 or 190xt be better incase I wanted to do some batwinging? Do these tractors have a hand clutch that would make it good for baling? What about the 7000 series, are those any good compared to these old timers? If I could find a nice one for a good price, would that be better? Thanks and any more input is welcome.

Hurst

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Don Dittmar

03-14-2005 11:47:48




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 Re: Powerdirector in reply to Hurst, 03-14-2005 09:56:36  
WE SQUARE BALED FOR YEARS WITH A D15 SERIES 1 AND HAD NO PROBLEMS. A D17 WOULD BE MORE THAN ENOUGH FOR THAT. YOU ARE RIGHT ABOUT THE DIFFERENCES IN BETWEEN THE D17/170. THE POWER DIRECT REALLY NEVER CHANGED MUCH, ITS JUST THAT THE D SEREIS WAS A MECHAINCAL SHIFT AND THE NEWER HUNDERED SERIES WAS A HYDRAULIC SHIFT, BOTH WOULD BE FINE FOR WHAT YOU INTEND TO DO. THE 190 WOULD BE A LITTLE BETTER FOR BATWINGING IN THE FACT THAT IT IS MAKING A FEW MORE HP. I DONT KNOW MUCH ABOUT THE 7000 SERIES TRACTORS SO I CANT HELP YOU THERE.

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Hurst

03-14-2005 12:06:29




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 Re: Powerdirector in reply to Don Dittmar, 03-14-2005 11:47:48  
I'm sure that you are probably getting tired of me asking questions about this, but what is the difference between the mechanical shift and the hydraulic shift. Can you ride the hand clutch on the hydraulic like you can with the mechanical hand clutch when baling esp.? Thanks for your help so far.



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Don Dittmar

03-15-2005 13:05:31




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 Re: Powerdirector in reply to Hurst, 03-14-2005 12:06:29  
THERE IS NO MECNAICAL LINK BETWEEN THE POWER DIRECTOR AND THE LEVER IN THE HYDRUALIC SHIFT. WHEN YOU MOVE THE LEVER, YOU ARE MOVING A HYDRAULIC VALVE WHCIH DIVERTS OIL TO APPLY THE CLUTCH PACKS. IN THE MECHANICAL SHIFT, THERE IS A LINKAGE AND SHIFT COLLAR IN THE HOUSING WHICH MOVE A SPRING PLATE TO APPLY THE PACKS. HYDRAULIC IS APPLIED BY OIL PRESSURE, MECHANICAL IS APPLIED BY SPRING PRESSURE. YOU CANT "FEEL" THE HYDRAULIC ONE, IT IS IN OR OUT. THE MECHANICAL ONE YOU CAN SLIP A LITTLE BIT, WHICH WORKS GOOD WHEN BALING HAY

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Max IN

03-14-2005 17:31:50




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 Re: Powerdirector in reply to Hurst, 03-14-2005 12:06:29  
The mechanical shift is the best for riding the clutch. The hyd. you dont have the control over the clutch as you do in the other. A 7000 you use the foot clutch for ground movement, pto is live.



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