Farm Equipment - Allis chalmers 8070 tranny leak...help!

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Allis chalmers 8070 tranny leak...help!

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Category: Allis Chalmers
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URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=49813
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Topic: Allis chalmers 8070 tranny leak...help!

Posted By: sherman
Subject: Allis chalmers 8070 tranny leak...help!
Date Posted: 29 Apr 2012 at 10:22pm

I have a 8070 leaking hyd oil out a hole between the engine and the tranny..... the guy who was bailing hay when it happend said the tractor felt like it was slipping.... power steering was still working, shut it down right away still fluid in the rear end......

any ideas? a seal ? cheap or a very expensive fix?

any help appreceated, thanks, sherman.

Replies:

Posted By: darrel in ND
Date Posted: 29 Apr 2012 at 10:32pm

my guess is the front transmission seal; requires a tractor split, but not as serious as it sounds. The slipping probably comes from oil getting on the torque limiter, which resembles a clutch plate. Maybe someone else who knows more than me can correct me if I am wrong, or add in their expertise. Darrel

Posted By: bigbird
Date Posted: 29 Apr 2012 at 11:03pm

I suspect that the previous posts are correct. Fairly easy fix if it is the seal, but takes a little time and front split. Roll front away, then replace the input shaft seal. Good time to check torque limiter and flywheel facing. Of course where do you stop? If the flywheel is off then I'd check the rear main. Good luck.

Posted By: bigbird
Date Posted: 29 Apr 2012 at 11:04pm

Darrel, I'll try to phone you on Monday. May have info for you.

Posted By: SteveM C/IL
Date Posted: 29 Apr 2012 at 11:05pm

if you got it split,REPLACE THE REAR MAIN SEAL!!!

Posted By: sherman
Date Posted: 29 Apr 2012 at 11:13pm

so probably nothing too major? under 1000 in parts if I split it myslef??????

thanks, sherman

Posted By: sherman
Date Posted: 29 Apr 2012 at 11:52pm

I will change the tranny seal, rear main seal, torque limiter and anything else I see.....

were those powershift transmissions pretty trouble free?

thank you all for your help!

sherman

Posted By: MI8050
Date Posted: 30 Apr 2012 at 4:23am

Torque limiter disk was 100$ four years ago, rear main and front trans seal were minor too, split my 8050 for the same dribble, minus the slipping part, got it all back together and it still does it.

Posted By: BStone
Date Posted: 30 Apr 2012 at 5:41am

Had the same trouble with mine.Replaced the seal and 35 hrs later it's leaking again.Was told now to replace pilot bearing,seal again and check front transmission bearing for wobble.I was told this wasn't a chronic problem with the AC's PS but most of them seem to have this problem now or have already had it.

Posted By: MACK
Date Posted: 30 Apr 2012 at 7:42am

PS or PD? If it is a PS I would say it is expensive. My guess if it happened all at once the adjusting nut on front housing in trans came off. Either stripped threads or pulled end off housing. MACK