CA PTO Shear Bolt/Shaft Direction
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=206509
Printed Date: 28 Jun 2025 at 4:58am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: CA PTO Shear Bolt/Shaft Direction
Posted By: dfwallis
Subject: CA PTO Shear Bolt/Shaft Direction
Date Posted: 30 Apr 2025 at 1:07pm
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New mower has label pointing the end with the shear bolt toward the tractor. There are two issues with this:' 1) The shear bolt is on a 1.5"+ protrusion off to the side of the Ujoint and nearly hits the top link bracket attached to the rock shaft. 2) This would cause water to run into the PTO shaft because the open end of the sheath would be pointed upward. I intend to mount it in the other direction because there is plenty of room for the shear bolt protrusion on the implement, and I want the sheath pointed downward to preclude water intrusion. I also may install my new slip clutch on the implement if the geometry/length works. There's no way the slip clutch would clear the rockshaft attached top link bracket.
Issues? ------------- 1952 CA13092 |
Replies:
Posted By: Jim.ME
Date Posted: 01 May 2025 at 5:32pm
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A slip clutch belongs on the implement, not the tractor PTO shaft. An over-running clutch goes on the tractor's PTO shaft. With a slip clutch you don't need the shear bolt set up.
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Posted By: steve(ill)
Date Posted: 01 May 2025 at 5:48pm
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we alway put the shear bolt on the mower deck end.... many mowers have the gear box INPUT shaft as ROUND with the bolt thru it... not a HEX drive like the tractor PTO. ------------- Like them all, but love the "B"s. |
Posted By: dfwallis
Date Posted: 01 May 2025 at 7:19pm
That's where I intend to install it. The PTO shaft itself already came with a shear bolt and markings indicate to attach it to the tractor. But I thought that was not the best approach, and not suitable for a 3 point modded CA. ------------- 1952 CA13092 |
Jim.ME wrote:Posted By: dfwallis
Date Posted: 01 May 2025 at 7:20pm
Thanks, This one has a normal 1 3/8 PTO 6 spline on the implement. ------------- 1952 CA13092 |
Posted By: dfwallis
Date Posted: 01 May 2025 at 8:37pm
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I'm thinking I may just turn the shroud around if I ever have to modify it (shorten, etc.) so other's (brothers, nephews, etc.) don't install it with the shear bolt toward the tractor. ------------- 1952 CA13092 |
Posted By: DiyDave
Date Posted: 01 May 2025 at 8:43pm
Likely that's what happened at the factory, got it put together backwards... Don't operate it that way, or you'll un-mow your lawn... ------------- Source: Babylon Bee. Sponsored by BRAWNDO, its got what you need! |