Farm Equipment - 1985 Gleaner F3 hydro

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1985 Gleaner F3 hydro

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=208884
Printed Date: 28 Dec 2025 at 11:22pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 1985 Gleaner F3 hydro

Posted By: Doezer
Subject: 1985 Gleaner F3 hydro
Date Posted: 11 Nov 2025 at 4:10pm

Hello, running corn with my 85 gleaner F3 hydro. When I stopped for afternoon chores everything was working fine. Got back in after chores and the head wouldn’t raise. Thought hmm probably something electrical. Went to put it in gear and it’s like the hydro is running almost full speed. No changes when I move the hydro lever any direction. The cable is moving on the hydro. I can’t get it in gear. So I shut it off and went looking around it. Come to find out the jack shaft or front engine pto shaft slid and popped the belts off. That’s why I wasn’t able to pick the head up. But can that also be the reason why the hydro was moving?? Like I said everything was fine before I parked it. Thanks in advance

Replies:

Posted By: Doezer
Date Posted: 11 Nov 2025 at 4:50pm

I think I just found the solution to my proble on Facebook. It looks like the hydraulic pump by the valves runs the control pressure for the hydrostat. Hoping to have it all back together tomorrow morning.

Posted By: SteveM C/IL
Date Posted: 12 Nov 2025 at 10:06am

Please let us know if that fixed it.

Posted By: Doezer
Date Posted: 12 Nov 2025 at 2:22pm

Got the ol’ girl put back together this morning and everything is back to normal. Ran it several hours today with no problem.