Rear main seal for AC220
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=212025
Printed Date: 17 Sep 2026 at 9:32pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Rear main seal for AC220
Posted By: Meavy_Hetal
Subject: Rear main seal for AC220
Date Posted: 20 Aug 2026 at 11:42am
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Hi there Will this seal http://https://www.ebay.co.uk/itm/274373696917" rel="nofollow - http://https://www.ebay.co.uk/itm/274373696917 fit my 1969 AC 220? IT has the 3500 engine. The parts catalogue I have shows different numbers. Thanks for any help. Fred
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Replies:
Posted By: DrAllis
Date Posted: 20 Aug 2026 at 1:02pm
| Can't see it. |
Posted By: Meavy_Hetal
Date Posted: 20 Aug 2026 at 2:41pm
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L https://ebay.io/m/fOEkhE" rel="nofollow - https://ebay.io/m/fOEkhE Oops! |
Posted By: DougG
Date Posted: 20 Aug 2026 at 5:30pm
| Not sure how a 220- 426 engine is , but 301,s have 2 cork like gaskets in the engine adapter plate that get hard over time and can leak- thinking you have a rear main leaking |
Posted By: DrAllis
Date Posted: 20 Aug 2026 at 7:40pm
| It's probably OK, but the newest p/n is 74062088 and they list that newer seal in the advertising. Buy that one. |
Posted By: SteveM C/IL
Date Posted: 20 Aug 2026 at 8:58pm
| Buy from AGCO dealer and ask if you can rent/borrow the install tool. Hopefully he was Allis before. |
Posted By: Meavy_Hetal
Date Posted: 21 Aug 2026 at 5:52am
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Thanks for the replies. The catch is being in England I'm not sure the AGCO dealers here would be able to help much as these tractors were never sold here but it is worth a shot! I have attached some pictures anyhow. Was thinking about the clutch, its not excessively worn but tempted to replace it or get it renewed while in there.  
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Posted By: DrAllis
Date Posted: 21 Aug 2026 at 5:58am
| That rear seal is installed BACKWARDS !! It should leak !!! |
Posted By: Meavy_Hetal
Date Posted: 21 Aug 2026 at 6:39am
| That isn't going to help then! I'm not to blame I've only had the tractor a year 😅. It came from Canada... |
Posted By: DrAllis
Date Posted: 21 Aug 2026 at 8:02pm
| With the rear plate off the engine, no special tool is really needed. Just use a plate large enough OD and press the seal in from the rear until it is flush with the front face of the rear engine plate. Press the wear sleeve on till flush on the flywheel using some sort of loctite to seal it to the flywheel. |