[AT] 39 Farmall A coming along.....

[charliehill]

Al,  I'm no pro on the subject but when you put the crank assembly back 
together you need to plastigage the bearings to make sure you have the right 
amount of bearing crush.   Some of the others can tell you from more hands 
on perspective than I can.  Steve W. comes to mind.  There are others for 
sure.

Charlie
----- Original Message ----- 
From: "Al Jones" <farmallsupera at earthlink.net>
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Sent: Wednesday, March 10, 2010 7:01 PM
Subject: Re: [AT] 39 Farmall A coming along.....


>I was wondering if plastigauge would be needed to double-check stuff when 
>it
> goes back together.  I gotta get a copy of Spencer's engine overhaul
> book.......
>
> You are correct, this is sort of a side project.  I have about 5 students
> that are really eating it up.  Before it is over I intend for all 24
> students to have played some role in it.  Basically when they are finished
> with what I am actually grading them on, (basic electricity--they have a
> test on the unit Friday) they can work on the tractor.  They are all 
> fairly
> proficient with hands-on type stuff so it works well to keep them busy.
>
> A lot of people don't realize it but career-technical education (formerly
> vocational) classes in NC public schools have an end of course test just
> like the "academic" subjects.  We have to make sure the students get the
> core curriculum (in other words, what they will be tested on) first.  I 
> will
> keep my opinions on how the system is run, at least in NC, to myself.
>
> Al
>
> --------------------------------------------------
> From: "charliehill" <charliehill at embarqmail.com>
> Sent: Wednesday, March 10, 2010 6:24 PM
> To: "Antique tractor email discussion group" 
> <at at lists.antique-tractor.com>
> Subject: Re: [AT] 39 Farmall A coming along.....
>
>> Sounds like they are doing good Al.  Don't worry about the Plastiguage
>> now.
>> You'll need to do it when you put it back together anyway so they can
>> learn
>> about that then.
>>
>> I'm guessing you only have a couple of class periods a week you can 
>> devote
>> to it?
>>
>> Charlie
>> ----- Original Message ----- 
>> From: "Al Jones" <farmallsupera at earthlink.net>
>> To: "Farmall/IHC mailing list" <farmall at lists.antique-tractor.com>;
>> "Antique
>> tractor email discussion group" <at at lists.antique-tractor.com>
>> Sent: Wednesday, March 10, 2010 4:53 PM
>> Subject: [AT] 39 Farmall A coming along.....
>>
>>
>>> My students got the engine out (off?) the tractor yesterday and onto a
>>> nice
>>> sturdy shop table.  The got to see how the main and rod bearing caps are
>>> all
>>> numbered so they go back in the right spot.  They got piston/rods 
>>> 1,3,and
>>> 4
>>> out today.  #2 will get interesting.  It is definitely the stuck one.
>>> Once
>>> they get the crank out, then they can wail on the back side of the 
>>> piston
>>> until their hearts' content!
>>>
>>> The crank appears to be in pretty good shape, the #3 rod bearing had 
>>> some
>>> bronze showing on the edge of the bearing insert, and I can feel a 
>>> slight
>>> corresponding groove on that crank journal.  I am hoping, hoping, hoping
>>> a
>>> quick grind will have it back into spec.  Time'll tell.  If we had more
>>> time, I would have loved to let them plastigauge everything to check
>>> tolerances, but their (and my) goal is to drive it out under its own
>>> power
>>> by the end of the semester and we were 1/3 of the way through on Monday.
>>>
>>>
>>> Al
>>>
>>>
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