[AJD] 2 cyl diesel won't start

[Charlie V]

O.K. guys.  Everybody is saying not stale fuel.  I did not really
suspect bad fuel either, even if it is low sulfur stuff.  However, why
not touch all of the bases.  Give the old girl every advantage.
Sooner or later it will need more fuel added anyway after it runs up
what it has.  If I was unable to tow the tractor and had to fire it
with the starter, I would say haul it out into the hot sunshine  and
let it stand at least 1/2 day to warm up the cast iron and the motor
oil a bit.  Warmer motor oil might help the motor turn just a little
bit faster.  If it is almost but not quite, little details can be the
difference.  Giving it a tow was in my mind also, but two people may
not be available to do it.????  Hopefully the injector timing is O.K.
as it did run for a couple of hours last fall.

I used to use a 70D back in the 1950's with the pony.  As I recall the
main engine turned at 200 RPM when the pony was at 10,000 Rpm.
200 is a pretty good  cranking speed.  Did it slow down some when you
closed the valves and brought on the fuel?  I do not recall.  It
usually started quickly enough that it was hard to tell.  Even 0
degrees F. did not bother that old girl.

Charlie V.


On Wed, Jun 13, 2012 at 9:47 AM, Spencer Yost <yostsw at atis.net> wrote:
> My guess is you got it out time.  Rebuild rules out compression, diesel fuel doesn't go bad that fast and water is not likely having been in a shop for a restoration.   Also, mist (i am assuming you mean fuel mist) from exhaust indicates air intake is fine.  Mist rules out air in lines too.
>
> Timing is the only thing left.   My guess is sometime during restoration injector timing was affected negatively.   If you are sure of timing, then the issue is starting RPM.  Tow the tractor to rule that out.
>
>
> If that doesn't work, my guess is the mist was coolant, which will cool the charge enough to prevent combustion during starting.   Extended towing will dry the cylinders and allow it to start though.   You'll need to double check the head.
>
> Good luck!
>
> Spencer
>
> Sent from my iPhone
>
> On Jun 13, 2012, at 8:28, "astroguy" <astroguy at nas.com> wrote:
>
>> Agree about diesel fuel. I found a JD 830 parked in a field for more than 22
>> years.  The number of years was accurately determined.  New batteries and
>> the tractor started right up . . . . with the 22 year old diesel.
>>
>> How about air intake?  Did you check for any critters making a new home
>> somewhere?
>>
>> ____________________________________________
>>
>>
>> ----- Original Message -----
>> From: "Michael" <mpmbd at yadtel.net>
>> To: "Antique John Deere mailing list"
>> <antique-johndeere at lists.antique-tractor.com>
>> Sent: Wednesday, June 13, 2012 4:31 AM
>> Subject: Re: [AJD] 2 cyl diesel won't start
>>
>>
>>> I never worked on one of the 2-cylinder JD Diesels. Is it possible that the
>>> injector pump is installed out of time? Timing is crucial to a Diesel as
>>> well as to spark-ignited engines. Putting the tractor into the highest
>>> forward gear and pulling it on a paved road should answer questions about
>>> cranking speed concerns.
>>> I do not agree about old Diesel fuel. I am using Diesel fuel that is 20
>>> years old and it works fine. 5 micron filter right where the hose leaves
>>> the
>>> tank.
>>>
>>> --------------------------------------------------
>>> From: "Me" <deanvp at att.net>
>>> Sent: Tuesday, June 12, 2012 8:47 PM
>>> To: "Antique John Deere mailing list"
>>> <antique-johndeere at lists.antique-tractor.com>
>>> Subject: Re: [AJD] 2 cyl diesel won't start
>>>
>>>> Grasping at straws a bit. Is it possible water has gotten into the fuel
>>>> supply?
>>>>
>>>> Connected by DROID on Verizon Wireless
>>>>
>
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