[AT] Smoking Diesels

Sun Jan 20 09:13:39 PST 2013

Bruce,  I read a thread on the Allis Chalmers Forum the other day that might 
interest you
in that regard.  It seems that on some AC tractors, I want to say 7010's or 
7020's the pump advance
is something like 24 degs. (that might not be right but it will indicate 
what is happening).  A year or
so later AC came out with a 7060 with the same engine but turned up some and 
intercooled.  The pumps
are the same but the timing on the 7060 pumps is 16 degs (again maybe not 
right but illustrative).
When the pumps on the 7010's go to a shop to be rebuilt they are being 
rebuilt to the 7060 specs.
but if a different mechanic puts it back together he does not know to change 
the timing to the 16 degs
setting that the pump is now set up for.

If you go to Allischalmers.com and go into the tractor forum and search you 
should be able to find the thread.
Like I said before,  I might be off on the numbers and might have them 
reversed but that is the general idea.

Changing brands, I used to driver tractor trailer trucks with detroit 8V 71 
engines.  Being V-8 engines they
almost always have an exhaust stack on each side.  If you ever see one 
running idle that is blue/white smoking on
one side you can just about be sure it has a broken compression ring on at 
least one piston on that bank of the engine.

Charlie

-----Original Message----- 
From: Bruce Fallon
Sent: Sunday, January 20, 2013 11:30 AM
To: 'Antique tractor email discussion group'
Subject: [AT] Smoking Diesels

My Isuzu diesel a 86 NPR BD1T  smoked really bad for the previous owner and
myself with no load. Blue smoke like it was cold. The previous owner said it
never got warm. Under load it was not bad but loafing or cruising with
minimal load just a constant cloud. You either had to be on the throttle or
off unless you wanted a cloud following you.   I could tell it was unburned
fuel.  Had the injectors rebuilt no help. Finally blew the turbo and decided
to tear it down, had a broken ring on number 4.  New rings, new turbo, when
it went back together no change. Took it to Harris Ford Isuzu in Lynnwood
what a joke. They told me the injectors were bad after just having them
rebuilt by a real diesel shop, the timing was off and they adjusted it. No
change whatsoever. When I got home looked and they never had a wrench on the
pump bolts. When I asked them how they set the timing without touching the
pump now the story was "Oh the timing was fine".  I finally decided it had
to be timing. I or the previous owner had not had the pump off. I took the
pump loose and turned it like advancing a distributor. Advanced it all I
could.  What a change.  I still need to take the pump off someday and
actually make sure it is correctly timed.  My guess is somewhere in its
lifetime someone had the pump off and put it back 1 tooth off the mark.
Timing was so late the fuel did not have time to burn.

Bruce Fallon
Langley, WA 98260

-----Original Message-----
From: at-bounces at lists.antique-tractor.com
[mailto:at-bounces at lists.antique-tractor.com] On Behalf Of Cecil R Bearden
Sent: Saturday, January 19, 2013 8:56 PM
To: Antique tractor email discussion group
Subject: Re: [AT] Question on Massey 255

I have a 7030 Allis that will smoke so bad when running that you can see
the smoke plume 5 miles on a clear day.   It has done that since it was
new.   It was owned by a farmer that used to live 1/2 mile from me.  I
bought the tractor from the 3rd owner , a trader, and my Dad drove it
back home about 12 miles.  I made a stop at the post office in the
little town where we bought it, then headed back to follow Dad.  When I
got back on the main road, he was over 5 miles away and I saw the smoke
plume.  it was then I knew where that tractor had come from!!!   I never
have loaded it to its maximum....

Cecil in OKla

On 1/19/2013 10:37 PM, Ralph Goff wrote:
> On 1/19/2013 10:01 PM, Mike Meulenberg wrote:
>> I have a Massey 255 with a Perkins 4 cylinder diesel engine. The problem
I'm having is it never seems to warm up. I don't think its ever been in the
green "operating" range since I've owned it; I'm thinking the thermostat
might be stuck open, but was hoping to hear from others before I tear into
it. It is quite smokey also, which I would take for a symptom of running
cold. Any thoughts.
>> Thanks,
>> Mike M
>> _____
> I would suspect the thermostat. My Super 90 with the Perkins 270 diesel
> warms up even in this cold Sask. winter as long as I have the grille
> completely covered and drive it a little while. Seems like all diesels
> have different "smoke habits". My Massey hardly smokes at all even on a
> cold winter start. It will smoke some black if I work it hard. Some of
> my other diesels will almost smoke me out of the shed on a cold start.
>
> Ralph in Sask.
>
> _______________________________________________
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> http://www.antique-tractor.com/mailman/listinfo/at

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