Farm Equipment - 5020 loader hydraulics

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5020 loader hydraulics

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=137437
Printed Date: 06 Sep 2025 at 10:11pm
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Topic: 5020 loader hydraulics

Posted By: alan-nj
Subject: 5020 loader hydraulics
Date Posted: 16 Apr 2017 at 9:58am

This first happened lat month in the big snow storm. Hydraulics stopped after a couple of hours. Pump squealed like it had no fluid. I let it sit for a while, and then it worked fine again.

After the snow, figured it was time for service. drained system, cleaned strainer, refilled with new UTH.

Used the loader last Saturday for 4-5 hours off and on, and no problems.

Yesterday used the loader extensively almost non-stop for about 4 hours or so and then same problem. Noise from the pump, little or no cylinder movement. System is full, and no leaks. If I let it sit and cool for 15 minutes or so, then it would work again for a few minutes and then stop.

Any thoughts? pump weak? Oil overheat? pump overheat? wrong oil? crap in the system that's blocked strainer?

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If ignorance is bliss, than happy days are here again.

Replies:

Posted By: alan-nj
Date Posted: 16 Apr 2017 at 11:00am

If I wait until it's completely cold it will work fine for a long time

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If ignorance is bliss, than happy days are here again.

Posted By: dt1050
Date Posted: 16 Apr 2017 at 11:52am

sounds like the oil is getting hot, maybe over heating the pump

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Just cause it's orange don't make it a tractor, there's only one..Allis Chalmers