Allis FWD 8050 Powershift Issues
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=208890
Printed Date: 12 Nov 2025 at 11:50pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Allis FWD 8050 Powershift Issues
Posted By: devbow76
Subject: Allis FWD 8050 Powershift Issues
Date Posted: 11 Nov 2025 at 9:28pm
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Got a good one for you guys. Tractor quit moving so the powershift was pulled and hauled into the local dealer for a "rebuild". Got it back and installed it in the tractor. Worked for 5 hours then quit again. Dealer wouldn't warranty because they just got the powershift and not the whole tractor so we decided to split it. Found that there was multiple piston seals ripped. Replaced all the seals and reinstalled in the transmission. Its been working for over 50 hours now however its developed a random problem. It will be driving and happens in any range or powershift. It acts like someone shifted the transmission into neutral and it just coasts to a stop. The range and powershift were not moved nor the clutch pressed it will be driving just fine and then coast to a stop. If i mess with the range/powershift it will start going again. Sometimes its 5 minuets and sometimes its 45 minuets. Removed range transmission cover and when it acts up all the range gears stop turning but you can still hear the hum of the clutch drums turning so I'm convinced its in the powershift somewhere. Also when it acts up the steering, brakes, and pto all still work just wont move. All clutch pressures are perfect to spec when it acts up as well. Any ideas are greatly appreciated.
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Replies:
Posted By: DrAllis
Date Posted: 12 Nov 2025 at 7:23am
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Ripped or cut piston seals on one of those transmissions is the mark of someone who has never done one before. You have a hydraulic problem. Does the 1800 RPM light on the dash work????????? I assume not. Get it fixed so we can diagnose what is going on. Was the Power Shift valve disassembled and gone thru ???????? Again, I assume not.
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