smoke

[chip12]

I've just replaced the main and rod bearings in my 240D (I think). The engine runs but smokes like a mosquito fogger which it did not do before. I have set the linkage for the injection pump twice now according to the manual (Align the centerpunch mark with the machined...) with no luck. It will only run at a medium RPM, then after a bit it will start revving quite a bit. If I take the throttle back to idle, it will shut off. If his were a gasoline engine, I would say it is flooding; that the fuel is not atomizing correctly. This tractor ran sweetly for about a year and then the crankshaft broke through the front rod bearing journal. Oddly enough, the rod big-end was not stretched, even though the engine would run. One of the mechanical engineers where I work identified it as a textbook casting flaw. The engine sounds good, just cannot control the RPM and the exhaust is smoking as if you were dribbling kerosene in it.

 

[kenmac]

Sounds like a timming issue Pump or engine

 

[chip12]

I suspect it is pump timing; I checked and rechecked and then checked again when I installed the timing gear onto the crankshaft. Thanks

 

[HoyeTractor]

I can't really tell from your post if that is what it is doing but an erratic idle is a classic governor problem. Did you ever try to pull off the injection pump without unhooking the internal governor linkage? We have found that if you try to pull up on the pump it can tweak some of the governor linkage making it difficult to set correctly.

Aaron
Parts@hoyeTractor.com
(940)592-0181

 

[DieselPower]

What color is the smoke?

 

[chip12]

The idle is not erratic, it is non-existent. It will not run at low RPM. I did not check the tach to get exact data, but it certainly 'ain't right'. The color of the smoke ranges from dark blue to black; the darker it gets, the more roughly it runs and if I do not open the throttle quickly at that point, it will stop running, as if it is choking. The governor linkage seems to be fine; I disconnected it before removing the pump. When I was setting the the linkage, aligning the punch mark with the machined surface, the illustration in the book suggested the punch mark to be maybe 3/8" from the end of the shaft; the punch mark on mine is more like an inch. Does this sound right?