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FWIW, and future reference. The Ringlemann chart is used to determine the opacity and color of smoke. This is a tool used in diesel engine diagnosis, and also by the EPA and law enforcement agencies for issuing citations against truckers and industries.
https://en.wikipedia.org/wiki/Ringelmann_scale
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The smoke is medium
What does “medium” mean?
and blends in with storm clouds.
Cumulus or cumulo-nimbus? Storm clouds have different colors and densities.
I do notice that I am always adding hydraulic oil. I know I have a leak in the external connections near the transfer case. Could there also be a leak of hydraulic oil into the combustion chamber?
Not a chance. However, hydraulic oil can cross-contaminate with engine oil through the hydraulic pump shaft seal. You will know this by an increase in engine oil level.
not sure how these are connected.
They aren’t connected at all.
If I leave the engine running at medium rpm
the smoke lasts about 10 seconds and stops and will repeat every 1-2 minutes.What is the tractor doing when it produces these symptoms? Are you tilling or brush hogging?
Do any of you have any more ideas with this new information or shall I pursue the path of having the injectors pop tested and cleaned.
There is also the possibility of the rack sticking and not allowing the governor to compensate, and then freeing up and the governor over compensates which would result in temporary over-fueling, and causing black smoke. As David has said, it wouldn’t be a bad idea to change out the injectors to see if it isolates the issue. It’s far cheaper than a fuel injection pump/governor assembly.
How many hours are on the tractor?
Do you treat your fuel with a biocide, sulfur additive, or cetane booster?
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If you have a fair amount of water in your fuel you will see it settle out in the bottom of the sediment bowl because the specific gravity of fuel is less than that of water.
So, if you are getting fuel to the bleed screw then the barrel and plungers are submersed. Then the only thing to prevent fuel from getting to the injectors is that the rack is pulled shut (or stuck). Make sure your engine stop cable is pushed all the way in, and that the throttle is set to 1/4.
Also, if you have a compression release make sure it’s not engaged.
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You can still be out of fuel and the glass sediment bowl will appear full, and this is because the lift pump takes it’s suction from the TOP of the sediment bowl through the screen. All you really need to do is crack the bleed screw and use the manual priming pump until unaerated fuel comes out. That assures that the fuel cavity in the injection pump is full. After that, just a few turns of the starter should be all that is necessary.
And by the way, don’t use GAS in a diesel engine.
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The injector R&R process is very straightforward. They are located on top of the cylinder head and held in by two bolts. You MUST keep everything meticulously clean while doing this.
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Hydraulic oil – ISO AW 46 or multi-grade ISO AW 32/46/68.
If it’s a diesel engine it has a fuel injection pump/governor assembly. These are normally driven from the accessory gear train on the front of the engine. How about a picture of the left side of the engine?
Someone else can help you with the other oils.
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You have a bad injector. The grey puffs are unburned fuel (white puffs would indicate coolant) and it’s caused by a dribbling injector that’s over-fueling one cylinder, hence the loss of power. The pintle spring in the injector is weak and “floats” at higher engine speeds, or there could just be debris in the injector not allowing the pintle to seat properly. I suggest taking the injectors to a diesel shop to have them pop tested, or just replace them. And always make sure your fuel is clean and free from moisture.
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What kind of quick hitch do you use Bob? I have been thinking about getting one for the dozer.
I have a Harbor Freight category 1 quick hitch. I don’t use the top hook that came with it, instead I use the optional link because I have a hydraulic top link for adjusting the angle of the hitch without getting out of the dozer.
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