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CA PTO Shear Bolt/Shaft Direction
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dfwallis View Drop Down
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Joined: 09 Mar 2023
Location: DFW
Points: 726 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dfwallis Quote  Post ReplyReply Direct Link To This Post Topic: CA PTO Shear Bolt/Shaft Direction
    Posted: 30 Apr 2025 at 1:07pm
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
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Jim.ME View Drop Down
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Joined: 19 Nov 2016
Location: Maine
Points: 962 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Jim.ME Quote  Post ReplyReply Direct Link To This Post Posted: 01 May 2025 at 5:32pm
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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steve(ill) View Drop Down
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Joined: 11 Sep 2009
Location: illinois
Points: 86771 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 01 May 2025 at 5:48pm
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.

Edited by steve(ill) - 01 May 2025 at 5:49pm
Like them all, but love the "B"s.
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dfwallis View Drop Down
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Joined: 09 Mar 2023
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Points: 726 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dfwallis Quote  Post ReplyReply Direct Link To This Post Posted: 01 May 2025 at 7:19pm
Originally posted by Jim.ME Jim.ME wrote:

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.

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
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dfwallis View Drop Down
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Joined: 09 Mar 2023
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Points: 726 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dfwallis Quote  Post ReplyReply Direct Link To This Post Posted: 01 May 2025 at 7:20pm
Originally posted by steve(ill) steve(ill) wrote:

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.

Thanks, This one has a normal 1 3/8 PTO 6 spline on the implement.
1952 CA13092
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dfwallis View Drop Down
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Points: 726 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dfwallis Quote  Post ReplyReply Direct Link To This Post Posted: 01 May 2025 at 8:37pm
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.
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DiyDave View Drop Down
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Joined: 11 Sep 2009
Location: Gambrills, MD
Points: 53724 		Post Options Post Options   Thanks (1) Thanks(1)   Quote DiyDave Quote  Post ReplyReply Direct Link To This Post Posted: 01 May 2025 at 8:43pm
Originally posted by dfwallis dfwallis wrote:

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.

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...
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