[Farmall] H water pump pulley

[jtchall at nc.rr.com]

I was meaning a standard reamer, not a taper pin reamer. I made it in to 
work today but due to bad weather we called it off, only 1 other guy made it 
in. I didn't make it past the receptionist office to get my handbook to find 
the "rules" for using this type of pin. I'm thinking it’s a fairly obsoleted 
method, I've never knowingly made anything that was assembled this way.

John Hall


-----Original Message----- 
From: E. John Puckett
Sent: Wednesday, February 25, 2015 9:52 PM
To: Farmall/IHC mailing list
Subject: Re: [Farmall] H water pump pulley

I think the idea of the grooved pin is for it to crush in and tighten
right at the end of the home.  If the hole were tapered from a reamer it
would be a tight fit ion the entire hole, but to crush it would take a
lot more force since it would be having to crush the entire length, not
just where it entered the hole.  Of course since I have never used one I
may be entirely wrong.

Carl S.  I like your Borg signature line.  I am a retired electronics
man, and got a kick out of it.

On 2/25/2015 5:19 PM, jtchall at nc.rr.com wrote:
> OK, just looked them up on McMaster and see how they work. Looks like they
> may work in a drilled hole, depending on how accurate it is, a reamed hole
> should be better. Are these reusable or once you compress it does it fail 
> to
> open back up enough to use again?
>
> John Hall
>
>
> -----Original Message-----
> From: szabelsk at gdls.com
> Sent: Wednesday, February 25, 2015 6:52 AM
> To: Farmall/IHC mailing list
> Subject: Re: [Farmall] H water pump pulley
>
> It's called a Grooved Pin. The one that Farmall used on the pump for the H
> is 1/8 inch diameter by 1 inch long, Type A.  The part number is 142488.
> The concept in that the pin is slightly smaller than the hole it goes
> into, however the pin has been slightly enlarged at the grooved end. The
> groove allows the pin to be squeezed a little so that it fits snugly into
> the hole and stays in place. They're supposed to be great for vibration.
>
> You can find info on them by doing a search on the internet using "GROOVED
> PIN".
>
>
> Carl Szabelski
>
>
> The Borg Are Wrong, Resistance Is Not Futile ..... It's Voltage / Current
>
>
>
> From:   <jtchall at nc.rr.com>
> To:     "Farmall/IHC mailing list" <farmall at lists.antique-tractor.com>,
> Date:   02/24/2015 06:33 PM
> Subject:        Re: [Farmall] H water pump pulley
> Sent by:        farmall-bounces at lists.antique-tractor.com
>
>
>
> Wow, wish I could see this thing. I can't recall ever seeing a pin of this
>
> type, anybody know the proper name for this type of pin? I'd love to
> figure
> out what it is and look it up in my machinist handbook.
>
> Thanks for the help guys.
>
> John
>
>

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