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Farmall & IHC Tractors Discussion Forum
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400 hyd seal

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460 anger

07-05-2007 17:20:57




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Have Farmall 400 that was leaking hydraulic oil into the engine. Took hyd. pump off, and the seal was bad, but original. Went to IH dealer and got a new seal, of course it's not as thick. My question being, which is the correct direction of the seal. When I tried to put it in with the spring toward the pump, it would not go and the spring would come off, so I tried it the other way, it went on good. Can't really see what the difference would be, because there is oil on both sides. Hyd. one side, motor oil on the other side. Any opinions or ideas would be greatly appreciated. I replaced lots of seals, I'm a mechanic, but this has got me confused. As usually you're trying to keep oil or grease in, and dirt out. Thanks.

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W-400 Chris

07-05-2007 22:14:44




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 Re: 400 hyd seal in reply to 460 anger, 07-05-2007 17:20:57  
sure there is oil on both sides but it is only under pressure from the hyd pump, thats why you get hyd oil in the motor and not vice versa, I have had it the other way on one of my Steiger's where the hyd pump seal actually lets motor oil into the hyds.



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CNKS

07-05-2007 17:34:49




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 Re: 400 hyd seal in reply to 460 anger, 07-05-2007 17:20:57  
Lip of any seal goes toward the leaking oil (in this case the hydraulic oil). There are very few exceptions to this. If the seal is the correct size, installation is not usually a problem. The direction of installation DOES make a difference.



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