Farm Equipment - 7060 hydraulic fluid ?

7060 hydraulic fluid ?

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Category: Allis Chalmers
Forum Name: Farm Equipment
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URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=208872
Printed Date: 12 Nov 2025 at 11:51pm
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Topic: 7060 hydraulic fluid ?

Posted By: AC7060IL
Subject: 7060 hydraulic fluid ?
Date Posted: 10 Nov 2025 at 11:40am

I’m replacing my 79’ black belly 7060’s plastic washer seals on its rear-end’s 3 drain plugs(1 differential & 2 finals). Plus inserted new rubber ring seals on its hydraulic lines that go into filter’s housings. These are the lines from pump.
Question: while adding new XL821, I mistakenly over-filled it(3 gal?). New oil is so clean it was difficult to see in glass site gauges. So I drained excess from left final plug because a 5 gal bucket fit there easiest. After draining left final by 3 gal, site gauges are still reading full? So wondering if I just started engine should rear fluid equalize between diff & finals? Which begs another question; does trans pump circulate fluid thru filters & then to each compartments (finals/diff?? ) or does fluid drain/run into finals from the one diff area?
TIA

Replies:

Posted By: DrAllis
Date Posted: 10 Nov 2025 at 12:29pm

I'd have left the 3 extra gallons in there. Just start the engine and let it run for 5 minutes or drive it around the yard and then let it sit for 15 minutes minimum.

Posted By: AC7060IL
Date Posted: 12 Nov 2025 at 10:18am

Thanks Dr. Yes, I ended up adding the 3 gal back into it after running/driving it around.

Heres a pic of parts I replaced.

The hydraulic drain plugs were an easy swap. Pic shows old ones across from new ones.

The hydraulic line seals were puzzling though. I foung that it's Left side hydraulic line(pipe) is larger diameter than the Right side hydraulic line. I had spec'd all my necessary parts online at agcopartsbook.com & then drove 70 miles to AGCO parts dealer to get them. But when I disassembled these two hydraulic lines to reseal them, I noticed their size difference. I know,,, should have taken old worn parts with me to dealer.. AGCO online states the same rubber seals & their metal backing washer for each of them....?

Anyway with new AGCO parts in hand, I was able to stretch 70259407 rubber seal over the larger left line & re-use its old larger backing metal washer. Just curious if anyone knows correct AGCO part for that larger left line's metal backing washer?

The right side hydraulic line had 2 sets of seals on it? After careful inspection, that pipe's exterior had a worn area where seal resided. Figured someone before me, must have double them up to address that issue? So, I also doubled them with new seals/backing washers.

Posted By: DrAllis
Date Posted: 12 Nov 2025 at 2:11pm

Left side tube was always a little larger than the right. My quick NASCAR pit stop fix was always remove the two bolts, slide the metal squeezer forward, find an Oring of the proper diameter, make one cut in it, slide it on the tube and reassemble. When the oil was drained out, I would fix it the right way, but a leaker that needed a quick fix this always worked quite well.