[AT] jd 70 diesel tractor

[Charlie V]

In the winter of 1958 / 1959, I used a JD 70D on a daily basis to spread
manure.  It was the only tractor on the farm that would start no matter how
cold it was and also the only one to have a comfort cover.  That 70 was
perhaps the wheatland model as it was low and had the under slung exhaust
system.  Under load it would give a little black smoke out the back from
the exhaust.  I really liked to watch that as it blew the most perfect
smoke rings about a foot in diameter.

Simple things amuse simple people.  Lucky I never climbed a tree with it
while looking down behind the tractor.

Charlie V.


On Fri, Apr 25, 2014 at 9:48 PM, <jtchall at nc.rr.com> wrote:

> I read an article in GEM many years ago where this supposedly happened on a
> 2 cycle diesel pulling a cotton gin, evidently the operator put a bunch of
> oil in the crankcase so the machine couldn't shut down or regulate speed.
> Never fooled with a 2 cycle diesel so I don't know if it was possible, just
> remember reading the article.
>
> My reservation to believing the engine was burning the oil is that it is a
> mighty small engine to consume over a gallon of oil in a couple minutes
> while presumably idling---even being diesel you would think the amount of
> smoke would be tremendous.
>
> If its not leaking externally, leaking into the coolant, or burning it, is
> it possible for it to be ponding somewhere in the valve train? Not certain
> how the transmission hooks up so not certain if it is possible for the oil
> to get into there. Same goes for the pony motor. Is it possible for a seal
> on the injection pump to be bad and the oil is being sucked into the pump
> and returned to the fuel tank? (OK I'm really reaching with that one!)
>
> John Hall
>
>
> -----Original Message-----
> From: joehardy at epix.net
> Sent: Friday, April 25, 2014 8:36 PM
> To: Antique tractor email discussion group
> Subject: Re: [AT] jd 70 diesel tractor
>
> Greg, It is probably sucking the oil up past the rings and burning it in
> the
> combustion chamber.  I owned an early VW Rabbit diesel and when the rings
> became worn, the engine would begin to run away with its self without
> stepping in the throttle because the engine was running on crankcase oil.
> My car manual said that if you experienced that condition when in neutral,
> get away from the car because the engine  would crank up so fast that it
> would blow itself apart. I believe you need the take the engine apart.
>  Keep
> us informed as to what you find....Joe Hardisky, Ryman Farm Dallas, PA
> On Friday, April 25, 2014 7:44 PM, Dean VP <deanvp at att.net> wrote:
>
> I
>
>
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