[AJD] 1948 A Valve Machining

[Chris C]

Thankyou all for the input on that.   I will pass this
information onto the machine shop.  I don't plan on
working this tractor much,  but I want it done right
as  I think it is going to actually get a full
restoration.  I just bought NOS oversized pistons to
put in it and will take the block to the machine shop
tomorrow.  I have always wanted a styled AR,  so I
want this one to be mechanically perfect.   Thanks
again for the input.

             Chris

--- Tom in N Texas <tdulin at pulse.net> wrote:

> Folks, the manual I have handiest is for the MT. It
> agrees with Dean and 
> the others. No knife edge. It takes half a column
> and pictures to say so, 
> along with "why". tell the machinist 0.064 inch. I
> think I've seen that 
> number in auto books. If you aren't going to work
> the tractor, it really 
> doesn't make a difference. If you are, that'll do.
> 
> Tom in North Texas.
> ---------------------------------------------
> At 11:43 AM 7/26/05 , you wrote:
> >Chris:
> >
> >I'm not aware of a specification on that
> measurement either. I've always
> >used the rule of thumb that the ground flat surface
> must exceed 1/8" and
> >that it does not penetrate the edge of the outside
> dimension of the valve
> >diameter.
> >
> >Dean A. Van Peursem
> >Snohomish, WA 98290
> >
> >I'm a walking storeroom of facts..... I've just
> lost the key to the
> >storeroom door
> >
> >
> >www.deerelegacy.com
> >
> >http://members.cox.net/classicweb/email.htm
> >
> >
> >
> >-----Original Message-----
> >From:
> antique-johndeere-bounces at lists.antique-tractor.com
>
>[mailto:antique-johndeere-bounces at lists.antique-tractor.com]
> On Behalf Of
> >Chris C
> >Sent: Tuesday, July 26, 2005 7:37 AM
> >To: Antique John Deere mailing list
> >Subject: RE: [AJD] 1948 A Valve Machining
> >
> >Dean and others,
> >
> >          I am looking for the thickness remaining
> from the top of the vavle
> >angle,  to the top surface of the valve.  All I can
> find in my books is that
> >you want a 'good margin'  and that youdo not want
> to have a 'knife edge' on
> >the valve.    The machine shop wanted a specific
> measurement,  but I don't
> >think that one exists.
> >
> >          Chris
> >
> >Dean VP <deanvp at att.net> wrote:
> >Chris:
> >
> >I have a I & T manual for A's but I don't
> understand the dimension you are
> >enquiring about.
> >
> >Dean A. Van Peursem
> >Snohomish, WA 98290
> >
> >I'm a walking storeroom of facts..... I've just
> lost the key to the
> >storeroom door
> >
> >
> >www.deerelegacy.com
> >
> >http://members.cox.net/classicweb/email.htm
> >
> >
> >
> >-----Original Message-----
> >From:
> antique-johndeere-bounces at lists.antique-tractor.com
>
>[mailto:antique-johndeere-bounces at lists.antique-tractor.com]
> On Behalf Of
> >Chris C
> >Sent: Monday, July 25, 2005 11:19 AM
> >To: ATIS LIST
> >Subject: [AJD] 1948 A Valve Machining
> >
> >Howdy all,
> >
> >I have my head for a 1948 A in the shop and I am
> >wondering the min. Valve heights for both the
> Exaust
> >and Intake.. For some reason I can't seem to find
> that
> >info in the books that I own.. I thought I had an I
> &
> >T manual around but it's well hidden if I have one.
> >
> >Thanks!
> >
> >Chris
> >
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> 
> Tom in N Texas, KC5INU,  tdulin at pulse.net, "Nothing
> Runs like a JD MT Deere",
> 1949 John Deere MT, JD No. 50 Box Blade,  1954 JD
> No. 5 Sickle-Bar Mower,
> 1975 JD 214 Lawn Tractor, 1918-22 JD Dain
> Horse-Drawn Sickle-Bar Mower
> 
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