7040 PD troubles
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=140338
Printed Date: 31 Dec 2025 at 4:59am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: 7040 PD troubles
Posted By: Lynn TN
Subject: 7040 PD troubles
Date Posted: 12 Jul 2017 at 7:49am
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Been bushhogging with our 7040 when you load the tractor either by being in thick weeds or going up hill the PTO will slow way down then the ground speed will nearly stop as well. When you stop and let it clean out it will go again fine. Filters are good as well as both sections full of oil. Didn't know if it's a pump problem or what. Tractor has 7000 hours but hate to junk it still looks and runs good.
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Replies:
Posted By: DrAllis
Date Posted: 12 Jul 2017 at 7:57am
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Sounds like torque limiter on the flywheel.
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Posted By: Lynn TN
Date Posted: 12 Jul 2017 at 8:16am
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Meant to also say transmission pressure above 1800 light stays on till pretty much wide open as well and back on when it slips.
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Posted By: Orange Blood
Date Posted: 12 Jul 2017 at 8:58am
No need to junk it, if it is the Torque limiter, you just need to split the tractor and replace it, just like the dry engine clutch of old. You will likely need to take a hard look at your flywheel, and the pressure plate, if it has been slipping like that for long, likely it is shot from heat stress.
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Still in use:
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Posted By: MACK
Date Posted: 13 Jul 2017 at 9:52pm
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Have flywheel resurfaced, new disc, and new pressure plate. Never mix old with new parts in a torque limiter. MACK
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