Smoking Like A Locomotive ??

The 7050 post got me thinking about the "black smoke" coming out of Nick's machine, but we run a '68 190 XT diesel that will/does "roll-the coal" under load and always has since dad bought it; he's the second owner and had less than 1000 hours on it when he bought it. It's had a turbo replacement 7 years ago, no pump/injector work though. Is this just the nature-of-the-beast with the 301 ? Seems like years ago we had a neighbor that ran 210's and they could leave a descent plume also .

This pump is all original, every wire through bolt/nut heads are still intact

We only run fuel from the local "co-op", always have since the purchase of this tractor; first diesel on the farm . The F2 will leave a pretty good plume also (433) and has had the pump rebuilt and injectors tested. A neighbors WHITE 7600 combine will out-smoke the 190 though LOL !!

A-C's turbocharged engines were not designed to be loaded under about 1700 RPM, because the turbocharger isn't able to deliver enough air for the fuel setting. Keep the speed up and you won't see much if any of the heavy black smoke. It's the design and nature of the beast.

the 7020 i had had the 301 with factory turbo and injection pump on factory setting it would leave a steady trail of visable black smoke with decent load on it at pto speed! my dads 1971 185 has done this under load from new. i was told its a normal thing for these old machines.

FREEDGUY wrote: This pump is all original, every wire through bolt/nut heads are still intact

injpumpEd wrote: FREEDGUY wrote: This pump is all original, every wire through bolt/nut heads are still intact That doesn't really mean it's still set a spec. That always gives owners a false sense or originality. A dealer mechanic who just did some tweaking, could put on a new seal wire.

Edited by FREEDGUY - 21 May 2020 at 6:24pm

The issue of smoke was a continuing engineering exercise with AC Harvey.  The engines were designed as low RPM engines, naturally aspirated at hp levels  much lower than later hp levels  that rose to levels never envisioned by the original engineers.  One of the highest hp/CI engine was the 4.33I.  The engine on the F2 was set at 95 hp and the 'orange' engines did smoke.  The last black engines with higher compression and the smaller hole  bosch injectors tips were almost smoke free at the same hp. The same addition of these injectors on the last 185's were smoke free as well.  Of course no one was satisfied at stock settings.  I questioned two of the engineers about the lack of cam shaft profile experimentation and why the much lower than competition turbo boost levels which would have eliminated the skywriting diesels.  The answer was no one wanted to buck the old timer engineers who got burnt on the D262T cam change and that just downsizing the A/R on the exhaust was good enough. Plus they didn't have the money, plus the commonality of parts through various hp levels was an economy thing. Finally ,  when an AC customer got a new tractor that didn't smoke - he felt like he had a tractor that needed more fuel....         

You definitely have an issue. My XT barely smokes even under the load of a sled going down the track. Certainly not rolling the coal. In the field bailing, discing, cutting hay, it is pretty clean. The pump was rebuilt by Ed so it’s clean “smoke” I attribute to his knowledge and skill. You may want to have your injectors and pump checked out.

Hasn't anyone realized trying to logically explain something for gassey is like doing card tricks for a dog   

My 78 (orange engine) F2 looks like an N6 going through the field...or down the road. Not going to spend the money to clean it up....it sips fuel so who cares?

The story goes something like this: During the summer months of I suppose 1979, there was filming done of the new Gleaner N-6 on the wheat run. The product of this filming was then inserted into the Dealer Open house movie for the winter 1980. Some top A-C execs saw the video of the new "N-6's" going thru the fields with a pretty heavy trail of black smoke and there was a phone call made to the Harvey Engine division to clean that smoke up. By the 1981 build season, Bosch injectors were being used in those engines and that was the first step in reducing smoke. By 1982, we then had the M-100 American Bosch injection pumps to go with the Bosch injectors. They were still never as clean as a good IH-66/86 series, but were better for sure.