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Rear main seal for AC220
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Meavy_Hetal View Drop Down
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Joined: 19 Feb 2026
Location: UK
Points: 9 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Meavy_Hetal Quote  Post ReplyReply Direct Link To This Post Topic: Rear main seal for AC220
    Posted: 20 Aug 2026 at 11:42am
Hi there

Will this seal 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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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 23482 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 20 Aug 2026 at 1:02pm
Can't see it.
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Meavy_Hetal View Drop Down
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Joined: 19 Feb 2026
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Points: 9 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Meavy_Hetal Quote  Post ReplyReply Direct Link To This Post Posted: 20 Aug 2026 at 2:41pm
Lhttps://ebay.io/m/fOEkhE

Oops!
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DougG View Drop Down
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Joined: 20 Sep 2009
Location: Mo
Points: 8481 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DougG Quote  Post ReplyReply Direct Link To This Post 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
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 23482 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post 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.
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SteveM C/IL View Drop Down
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Joined: 12 Sep 2009
Location: Shelbyville IL
Points: 9196 		Post Options Post Options   Thanks (0) Thanks(0)   Quote SteveM C/IL Quote  Post ReplyReply Direct Link To This Post 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.

Edited by SteveM C/IL - 20 Aug 2026 at 8:59pm
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Meavy_Hetal View Drop Down
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Joined: 19 Feb 2026
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Points: 9 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Meavy_Hetal Quote  Post ReplyReply Direct Link To This Post Posted: 21 Aug 2026 at 5:52am
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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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 23482 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 21 Aug 2026 at 5:58am
That rear seal is installed BACKWARDS !! It should leak  !!!
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Meavy_Hetal View Drop Down
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Joined: 19 Feb 2026
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Points: 9 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Meavy_Hetal Quote  Post ReplyReply Direct Link To This Post 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...
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DrAllis View Drop Down
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Points: 23482 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post 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.
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