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Allis Chalmers Discussion Forum
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WD Tranmission Fluid Change

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Jeff Will

06-27-2005 06:08:31




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WD Transmission Fluid Change

I recently inherited an old WD. I changed the transmission fluid over the weekend and when I went to start it back up the hydraulics were dead. I checked and all the fluid was gone from the hydraulics? I am not sure if I drained the hydraulic fluid instead of one of the tranny plugs. I drained the transmission at the bottom of the differential, PTO, and at bottom of transmission. Where is the drain for the hydraulics? Any other thoughts?

Thank you.

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Sid

06-27-2005 17:58:08




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 Re: WD Tranmission Fluid Change in reply to Jeff Will, 06-27-2005 06:08:31  
You might have a leaking seal allowing the hydraulic to drain into the next compartment. Are you sure there was hydraulic fluid in there to begin with?



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Texas Denny

06-27-2005 09:31:59




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 Re: WD Tranmission Fluid Change in reply to Jeff Will, 06-27-2005 06:08:31  
The PTO shares the hydraulic oil. If you drained the PTO, you drained the hydraulics.



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Brian G. NY

06-27-2005 13:47:44




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 Re: WD Tranmission Fluid Change in reply to Texas Denny, 06-27-2005 09:31:59  
Tex, You"re thinking of the belt pulley gears which are lubricated by the hydraulic oil. The PTO is lubed by the 80EP gear oil in common with the Differential, transmission and hand clutch. The book says there are three drain plugs; diff., trans. & clutch housing. They forget to tell you that if your tractor has a PTO (just about everyone does) the "clutch housing" plug is the one on the bottom of the PTO housing. The hydraulic oil drain plug is just ahead of the PTO housing.

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Jeff Will

06-28-2005 17:20:09




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 Re: WD Tranmission Fluid Change in reply to Brian G. NY, 06-27-2005 13:47:44  
I did pull the plug ahead of the PTO so that would explain what happened to the hydraulic fluid. I know I got the plug on the bottom of the PTO and at the differential, I must have missed the other plug. Is the last plug between the PTO and the differential, I think I saw one on a square sheet metal plate is this it?

Thanks for all the help.



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Brian G. NY

06-29-2005 13:44:45




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 Re: WD Tranmission Fluid Change in reply to Jeff Will, 06-28-2005 17:20:09  
Yep, that"s the one. The best way to get that one is with an 8 point socket; it"s tucked up there right next to the PTO shaft. BTW, the best way to get at the fill plugs is with 8 pt. sockets as well; there are two different size plugs so you need two different sockets.



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Texas Denny

06-27-2005 20:07:00




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 Re: WD Tranmission Fluid Change in reply to Brian G. NY, 06-27-2005 13:47:44  
Whopps!



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