[AT] update on jd 70 diesel

[Dean VP]

Greg,

Thanks for the additional info. I'll take a WAG at what the mechanic might
be saying. I need to study the 70 D Parts Catalog to verify this so right
now it nothing more than a guess. The oil pump does pump oil to the right
Main Bearing housing which is behind the clutch and the reduction gear
cover. Therefore, if there is a severe leak at that main bearing housing I
suspect it is possible to have oil pumped into the reduction gear housing
and then drain into the transmission chamber. There are a couple data points
that don't add up though. Upon filling the crankcase with oil adequate oil
pressure was noted for a short period of time.  It would seem to me that
having so much oil disappear so fast that the leak would have to be fairly
large and not allow oil pressure to build up.  The other data point that
doesn't compute is that apparently the crankcase has been pumped empty at
least twice, for at least a total of 6 gallons of oil, the transmission
chamber must be overflowing.  I look forward to hearing what the end
diagnosis is. BTW, I've never heard of this phenomenon on any of the
horizontal JD Two Cylinders before, of any fuel type.  First time for
everything. 

Dean VP
Snohomish, WA 98290

" . . . The tree of liberty must be refreshed from time to time with the
blood of patriots and tyrants. It is it's natural manure . . . " Jefferson

-----Original Message-----
From: at-bounces at lists.antique-tractor.com
[mailto:at-bounces at lists.antique-tractor.com] On Behalf Of Greg Hass
Sent: Friday, April 25, 2014 8:12 PM
To: at at lists.antique-tractor.com
Subject: [AT] update on jd 70 diesel

First off on the oil, I was  probably to general on the amount we put in. My
brother was pouring from a 5 gallon pail so when he said 5 quarts of oil it
could have been 5 or 15 quarts, who knows. No one was home but the guy he
bought it from was out today. He put some more oil in it and started it, and
same as before, it was gone in a couple of minutes. He tried to check the
transmission but was unable to get the plug out with the wrenches he had. We
tried last night with channel locks but also couldn't get the plug out. I
tried to get my brother to go over to the shed tonight with the right
wrenches but he said he stopped payment on the check and it was going to be
the dealers problem to fix it. Never mind that it is a 50 year old tractor
and you can't expect it to be perfect although this is a serious problem. I
could right a book about my brothers way of thinking, but I wouldn't go
there. Anyway, the dealer called a mechanic that used to work for him in
another town but is now on his own. What I say now has went from the
mechanic to the dealer, to my brother, to me, and now to the list so I can't
say how accurate it is. I don't quite understand,but the mechanic said
according to the book the oil goes from the pump to some main seal and then
to the engine and if the seal is bad it will pump it into the transmission
or the rear end. What I don't get is why would there be that kind of a seal
in between if it goes bad why would all the engine oil get pumped out of the
crankcase. I have seen many seals go bad in my lifetime ; but I have never
had one that would let oil disappear that fast, so I must be missing
something. As it now stands, the dealer is going to pick up the tractor and
haul it to that mechanic some 70 miles away and have him see what he can
find and just go from their.
            Greg Hass
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