7030 pto?
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=124951
Printed Date: 29 Sep 2025 at 3:01pm
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Topic: 7030 pto?
Posted By: Shawn PA
Subject: 7030 pto?
Date Posted: 23 Jun 2016 at 8:06pm
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After round bailing my pto is loose and leaking oil from around it. I know it's not the bolts for 540/1000 they are tight. It's the whole unit. Is this going to be a easy fix ? Or is it pretty in depth ? Do I have to drain the oil out of rear to do this or just park it on a hill ? Thanks for the help.
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Replies:
Posted By: ALLISMAN32
Date Posted: 23 Jun 2016 at 9:58pm
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Large nut backed off shaft internally. Drain oil, remove rectangular plate under pto portion of rear housing to disassemble. Plan on putting both sets of seals and o-ring to fix your leak. Later tractors had a castellated nut with a pin using mechanics wire to prevent the problem of nut loosening up.
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Posted By: DrAllis
Date Posted: 23 Jun 2016 at 10:10pm
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When you get it reassembled with new seals and adjusted properly for rolling torque, stake the nut and tack weld it so it won't come loose again. Either that, or get the shaft and castellated nut from a newer chassis so the nut can't come loose.
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Posted By: Shawn PA
Date Posted: 24 Jun 2016 at 5:48am
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That sounds easy enough. Thanks you !
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Posted By: SHAMELESS
Date Posted: 24 Jun 2016 at 8:19am
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I posted a "how to" step by step on here some time back, might still be able to find it...
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Posted By: Shawn PA
Date Posted: 24 Jun 2016 at 11:18am
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How do I know what the rolling torque is ? How do I adjust it ?
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Posted By: DrAllis
Date Posted: 24 Jun 2016 at 11:48am
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When you get it apart, it will be come much clearer.
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Posted By: SteveM C/IL
Date Posted: 24 Jun 2016 at 12:42pm
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just guessing here but probably similar to a pinion adjustment.tight enough that it has a bit of "stick" to it when trying to turn but then rolls free on broke loose. my guess is they wanted enough preload so it couldn't slop around and get too loose after time....just a guess
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Posted By: Shawn PA
Date Posted: 27 Jun 2016 at 11:58am
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Well I put the new seals and oring in the pto and put it all back together and when I filled it with oil it leaks more now than before ! Can someone help with where I went wrong ? I wonder if dad and I might of smashed the seals when we was putting it back together ?
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Posted By: Lonn
Date Posted: 27 Jun 2016 at 3:27pm
One tiny dent, and I mean tiny, will put a ripple in the rubber seal. Takes special seal installing tools to get it right in some cases. I've never dealt with the PTO of a 7000 series.
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Posted By: DrAllis
Date Posted: 27 Jun 2016 at 4:07pm
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Seals have to be installed squarely and damage free. O-ring seal needs to be lightly lubed with clear RTV and drawn in place slowly and squarely. I've never had one that needed to be a do-over.
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