[AJD] 1939 JD 'A'

[Brian VanDragt]

Don,
There is an air breather pipe just above the tappet oil pipe.  It goes from
the governor housing to the top of the air cleaner.  The air passing through
the air cleaner causes a vacuum in the breather pipe that draws air from the
crankcase and new air in through the breather vent.  The push rod and oil
return passages can ventilate the tappet cover.

Brian

----- Original Message ----- 
From: "Don Shehi" <shehi at commspeed.net>
To: "'Antique John Deere mailing list'"
<antique-johndeere at lists.antique-tractor.com>
Sent: Wednesday, June 16, 2004 9:36 AM
Subject: RE: [AJD] 1939 JD 'A'


>
> Brain
>
> Thanks for the information on the tappet oiling on the John Deere A's.  My
> dad always told me that the pipe was an air breather pipe.  I have seen
the
> old A's apart for putting in new rings, but my memory has faded on how it
> looked.
>
> Don Shehi
> Camp Verde, Az
>
> -----Original Message-----
> From: antique-johndeere-bounces at lists.antique-tractor.com
> [mailto:antique-johndeere-bounces at lists.antique-tractor.com] On Behalf Of
> Brian VanDragt
> Sent: Tuesday, June 15, 2004 8:14 PM
> To: Antique John Deere mailing list
> Subject: Re: [AJD] 1939 JD 'A'
>
> On Dave and Robert's A, serial number 487153, the tappets are oiled with
the
> tube from the govenor to the tappet cover.  Starting with serial number
> 488000 the tappets were oiled with a line from the block inside the tappet
> cover.  On the earlier system like Dave and Roberts, the oil comes from
the
> filter, up to the governor housing and squirts out of a hole inside the
> governor housing onto the fan gears which spash the oil all around inside
> the housing.  There is a trough cast into the inside front of the governor
> housing which collects oil to send down the tube to the top of the tappet
> cover where it is dripped into another trough inside the tappet cover that
> drips oil onto each rocker arm.  There could be an obstruction in the
> governor housing either where oil is sprayed onto the gears, or where the
> trough drains into the oil tube to the tappet cover.  Both of these holes
> are fairly small.  Try taking the tube off of the governor and stick a
wire
> into the hole in the governor housing.  Oil should drip steadily through
the
> tube, the tappet cover does not need to be installed for oil to come out
the
> tube.
>
> Brian VanDragt
>
>
> ----- Original Message ----- 
> From: "Don Shehi" <shehi at commspeed.net>
> To: "'Antique John Deere mailing list'"
> <antique-johndeere at lists.antique-tractor.com>
> Sent: Monday, June 14, 2004 12:16 AM
> Subject: RE: [AJD] 1939 JD 'A'
>
>
> >
> >
> > Dave and Robert
> >
> > I grew up on my dad's 39 A. so I put a lot of hours on one in eastern
> > Kansas.
> >
> > If I remember right, the tube you are talking about from the tappet
cover
> to
> > the governor housing is for crankcase ventilation. I don't think it
> carries
> > oil, only the fumes off the head of the engine.
> >
> > I believe the tappets are oiled from an oil line off the head.  It's
been
> a
> > long time since I have in one.
> >
> > Don Shehi
> > Camp Verde, Az
> >
> > -----Original Message-----
> > From: antique-johndeere-bounces at lists.antique-tractor.com
> > [mailto:antique-johndeere-bounces at lists.antique-tractor.com] On Behalf
Of
> > Gail L. Kratzig
> > Sent: Sunday, June 13, 2004 6:27 PM
> > To: antique-johndeere at lists.antique-tractor.com
> > Subject: [AJD] 1939 JD 'A'
> >
> >
> >
> >      We just got our 1939 'A' running again after a complete engine
> > overhaul.  We did not reinstall the valve cover-- as we wanted to
> > retorque the head nuts after the engine got hot.  While the engine
> > was running, no oil came out of the tappet oiler pipe from the
> > governor housing to the cover (that pipe was installed).  We were
> > wondering what makes the oil come out and with what frequency does it
> > work?  Does the valve cover need to be installed for the oil to flow
> > out of the pipe?  We did make sure that the line was clean and free
> > of obstructions.
> >      From time to time, someone brings up the topic of yellow-backed
fans.
> >  We were wondering again, if our 'A' (487153) had a fan that was
> > painted yellow?  And for future reference what years did this occur?
> >
> >
> > Thanks,
> >      Dave & Robert
> >
> > 1959 830D (8302786)
> > 1957 720SD (7207359)
> > 1951 B (277269)
> > 1939 A (487153)
> > 1937 BO (327362)
> >
> > _______________________________________________
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> >
> >
> >
> >
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