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Replacing rear main seal on 8070
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Branger View Drop Down
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Joined: 20 Dec 2010
Points: 61 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Branger Quote  Post ReplyReply Direct Link To This Post Topic: Replacing rear main seal on 8070
    Posted: 20 Dec 2010 at 8:52pm
I am thinking of tackling this job in our farm shop.  I have a service manual but am wondering if there are any pointers from anyone that has done the job.  This is a FWA/ powershift model.  The manual gives two methods.  One appears to be removing the adapter plate and one does not.  Which is best?  I really don't want to try this and get it back together and have it still leak.
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SLee(IA) View Drop Down
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Joined: 11 Sep 2009
Location: Polk City, Iowa
Points: 257 		Post Options Post Options   Thanks (0) Thanks(0)   Quote SLee(IA) Quote  Post ReplyReply Direct Link To This Post Posted: 20 Dec 2010 at 8:59pm

I would remove the adaptor plate because there are a couple big o-rings back there that can get hard and start leaking. Easy to do once you are that far into it. Maybe time for a torque limiter while your there?

Steve
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Joined: 11 Sep 2009
Location: Midway, Ky
Points: 1213 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Hurst Quote  Post ReplyReply Direct Link To This Post Posted: 20 Dec 2010 at 9:37pm
The adaptor plate is only a few more bolts once you have the tractor split.  Just make sure you have the engine secured in the rear by something besides the plate, like an overhead hoist.  I didn't change the o-rings when I did my 7000's rear seal the first time, and it kept leaking after that.  Also, change the wear sleeve on the flywheel (if the 426 has one).

Hurst
1979 Allis Chalmers 7000
5800 Hours
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