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Case Tractors Discussion Forum
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David Brown 770 Leakin oil

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papawronnie

06-18-2007 18:07:22




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Howdy ,I just purchased an early 70's David Brown 770 selectamatic.It runs great but is leakin a lot of oil between the motor and transmission.Could it be some kind of seal ? Is this major ,or minor?Hard to fix?The hydraulics seem to be stuck also .The lever will not move.The tractor has been sitting since last year .Any help will be greatly appreciated.




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JV3CII

06-19-2007 07:06:43




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 Re: David Brown 770 Leaking oil in reply to papawronnie, 06-18-2007 18:07:22  
Sounds like either a crank end oil seal or the seal at the front of the gearbox. Compared to other tractors, neither are difficult to fix as you don't need to split the tractor (they have a spine type frame).
If you want a quick diagnosis, you could try looking underneath the clutch area. Most 770's have a little inspection hatch there that might let you see which side the oil is leaking from.
Are the hydraulics stuck up or down?
Cheers, JV.

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papawronnie

06-20-2007 18:32:56




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 Re: David Brown 770 Leaking oil in reply to JV3CII, 06-19-2007 07:06:43  
Howdy,the hydraulics are stuck about half way.I got out there this evening and got the handle to move back and forth.It was stuck also,but I kept workin with it till It works fine now.The lift still wont work.I took the filter off and it was dry and kinda yucky lookin.It dont seem to be pumpin any hydro oil.I took the dipstick out of the top of the tranny,no oil on it.Is the oil in the rear end and the tranny and the hydraulics in the same place,or separate?What type does each take?I will check under the tractor for the leak where you said and get back with you tommorrow.Thanks ever so much.

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