Farm Equipment - D17 Rear Main Seal

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D17 Rear Main Seal

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=43263
Printed Date: 03 Sep 2025 at 1:53pm
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Topic: D17 Rear Main Seal

Posted By: bincitybandit
Subject: D17 Rear Main Seal
Date Posted: 05 Jan 2012 at 9:57am

I have the pan off my D17 and was wondering if by chance it is possible to replace the rear main from underneath without having to split the tractor? My dad said he used to have a special tool for doing this on a Minneapolis Moline U.

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ALLIS: B, WC, G, G, D10, D12, D14, D14(NF), D15, D17, D17(NF), D19, D21, D21
MINNEAPOLIS MOLINE: U, U, U(NF), GB
JOHN DEERE: L
FORD: 871 Select-O-Speed
CASE: 600 Combine

Replies:

Posted By: MACK
Date Posted: 05 Jan 2012 at 10:02pm

No. MACK

Posted By: Orange Blood
Date Posted: 06 Jan 2012 at 6:10pm

No harder than it is to split these ol girls, you will spend far less time in the long run, and it will hold better if you split it, and pull the flywheel. While you are not really suppose to, at that point you can change the bottom half fairly easy without pulling the pan or the rear main cap down, but you have to be careful you don't glue everything together. That also depends on how the old one was glued in, some just won't come out in one piece, others that were poorly done, come out fairly easy.

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Still in use:
HD7 WC C CA WD 2-WD45 WD45LP WD45D D14 3-D17 D17LP 2-D19D D19LP 190XTD 190XTLP 720 D21 220 7020 7030 7040 7045 3-7060
Projects: 3-U UC 2-G 2-B 2-C CA 7-WC RC WDLP WF D14 D21 210 7045 N7

Posted By: DrAllis
Date Posted: 06 Jan 2012 at 6:59pm

If the upper half of the rear seal has the OEM bolts in it, they cannot be removed without hitting the crankshaft flange. Sooooo, you have to cut them off and replace with shorter bolts if you try it without removing the crank from the engine.

Posted By: Orange Blood
Date Posted: 06 Jan 2012 at 10:01pm

Dr. Allis,

I guess I have always been lucky someone else put shorter bolts in, I never knew the bolts would not clear the crank, I know they wouldn't come out of the seal holder, but once all three are loose, the whole thing comes out. I can certainly see where longer bolts would preclude the change.

Thanks,

Anthony

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Still in use:
HD7 WC C CA WD 2-WD45 WD45LP WD45D D14 3-D17 D17LP 2-D19D D19LP 190XTD 190XTLP 720 D21 220 7020 7030 7040 7045 3-7060
Projects: 3-U UC 2-G 2-B 2-C CA 7-WC RC WDLP WF D14 D21 210 7045 N7