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Allis Chalmers Discussion Forum

Question on D-17 rear seal...?

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04-19-2008 16:38:29

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I know that I hav ea good sized rear main seal leak on my 63 Series III Gas D-17 Allis.
I read in the factory manual that it takes a two piece oil seal. My question is: Can I replace this seal bye removing the oil pan, then the rear main cap, fishing it out? Sure would save a "heck" of a lot of time.
Pleae let me know what you folk think

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04-19-2008 20:56:33

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 Re: Question on D-17 rear seal...? in reply to loveshisallis, 04-19-2008 16:38:29  
Check the archives- I think it was on here- where someone posted about using two plastic strips and some wire to fish it around the crank. I know that I printed out the pix of the whole operation.

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04-19-2008 17:45:01

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 Re: Question on D-17 rear seal...? in reply to loveshisallis, 04-19-2008 16:38:29  
Edpap is likely right on. However, I did replace the two-part rear seal in a series I D-17 one time without a complete split; oil pan & starter off , loosened frame to bell housing bottom bolts til it spread say an inch; removed spark plugs & put a shaft on PTO so I could turn engine over with a large cresant wrench ever so slowly. Small fingered friend worked seal into place as I slowly turned over engine. Did ruin one half-moon seal practicing! It ran for years with no leak afterward. Was probably lucky; the good Lord looks after dummies like me.

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04-19-2008 17:19:11

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 Re: Question on D-17 rear seal...? in reply to loveshisallis, 04-19-2008 16:38:29  
No I don't think you can do that. the lower half of the seal is in the rear main cap. if you don't get that seal in there just right it pinches between the main cap and block. and then this summer you will be doing a motor job. you need to split the tractor and pull the flywheel rear plate and the oil pan. Or if the clutch is not getting oil soaked, Park it with a bucket under it and keep the oil full and run it.
Good luck Ed

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