[AJD] 1948 A Valve Machining

[Tom in N Texas]

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