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

[John Dunlap]

MAKE sure you don't move anything while doing the plasti-gauge....wont work

On Wed, Mar 10, 2010 at 6:57 PM, Rupert <rwenig2 at xplornet.com> wrote:
>
>        Plasticgaging the bearings is a must do in my books. Check them all as
> it is possible that an off size bearing got in the box.
>        Don't forget to check the piston ring end gap too when it comes time to
> install the pistons.
>
> Rupert
>
> On 3/10/2010 5:13 PM, charliehill wrote:
> > 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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>
> --
>
> yvt
>
> Rupert Wenig
> Camrose, Alberta, Canada.
>
> email: rwenig2 at xplornet.com
>
> http://users.xplornet.com/~rwenig/Home/
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