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Allis Chalmers Discussion Forum
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D 21 problem

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NCdairyfarmer

06-09-2008 16:08:54




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I have a AC D-21 and if I dont park it with the front end down hill, the next time I go to use it the steering wont work till I get the front on a slope of two to one or better. I got a new hydro filter and I am going to change the hydro. Is there anything I am missing or is the pump just weak. It has always been this way the whole time I have owned the tractor. Just looking to see if anyone else has had or has the problem.

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wilko

06-11-2008 20:16:36




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 Re: D 21 problem in reply to NCdairyfarmer, 06-09-2008 16:08:54  
My IH 806 has a similar problem. The recommended solution is to pour an extra 5 gallons of hytrac in the gearbox to cover the suction leak. Don't know what that would do in the AC.



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Edpap

06-09-2008 16:29:04




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 Re: D 21 problem in reply to NCdairyfarmer, 06-09-2008 16:08:54  
Hello,
I had a 170 in the shop once and i drained the hyd oil and I could not get the steering working. an old AC man told me to park it down hill and that worked. I did some checking and found that the compartment where the hyd pump is supposed to fill up with oil to some holes high up in the housing well above the dipstick level. the return line runs into the pump housing and the dipstick is one housing back. you probly have a bad seal on the trans input shaft and the oil is draining back out of the pump housing.
If you didn't want to fix the seal you could fill the pump housing thru the return line till it came up on the dipstick. the next morning you will show the oil way overfull but after running it awhile it will level out. Just thought I should say that I am not sure if a d21 is the same, but I bet it is
Good Luck Ed

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