3 Pt Adjustment Question
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=207357
Printed Date: 09 Jul 2025 at 1:05am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: 3 Pt Adjustment Question
Posted By: dfwallis
Subject: 3 Pt Adjustment Question
Date Posted: 04 Jul 2025 at 8:35pm
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I modded my CA custom 3pt hitch so that the lift arms will now go all the way to the ground. However, I'm concerned that if I let the front of a mower drop too low (say crossing a ditch), that it will bind the PTO shaft. Is there a general rule about how much you SHOULD allow the PTO shaft to bend? Avoid crossing ditches or just limit the downward travel? Best practices?
------------- 1952 CA13092 |
Replies:
Posted By: DiyDave
Date Posted: 04 Jul 2025 at 8:51pm
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Max deflection for a U joint is 35 degrees, for safety, 20 degrees. That's what the book says... In practice, making sure you have the length right, and the joints properly phased are the important things... ------------- Source: Babylon Bee. Sponsored by BRAWNDO, its got what you need! |
Posted By: WF owner
Date Posted: 05 Jul 2025 at 6:11am
| If you drop it slowly when it's running, it will tell you when it is approaching too sharp (chattering). You should then be able to adjust your depth so you can't drop it too low. |
Posted By: DrAllis
Date Posted: 05 Jul 2025 at 8:04am
| Adjustable chains to control the max drop on the draft arms would be a good accessory to have to prevent a disaster like that from happening. |
Posted By: dfwallis
Date Posted: 05 Jul 2025 at 9:33am
There are screw/turnbuckle adjustments. Just trying to determine where to set them.
------------- 1952 CA13092 |
DrAllis wrote: