I have about 22 hours on this tractor, 12 hours with a flail mower and the rest pulling a spring tooth and general FEL work. I noticed at startups that there was quite a bit of black smoke coming out of the exhaust. I thought nothing of it at first untill I seen all the black smoke on my FEL from having it raised up while mowing. I calld my dealer that I bought it from and they are supposed to be coming out in the next few days to look at it. What can cause this? Should I still use it or wait for it ti be looked at? The service dept said that I was the first person to call with a problem with the M-series. Anyways any help would be great.
M6040 Blowing Black Smoke
- Thread starter drollz
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kevinj
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drollz said:
Do you drive a real truck or a diesel pickup??? It is much harder to see the stack on a highway vehicle, on the tractor it only few feet from you and in your line of site. Neither has an object to collect soot like a loader frame. Look at the trailer on big rigs or watch the stack. Diesels smoke !!
I was a little worried about my fel arm having black soot on it too till i saw others in the fourm talking about what they use to clean their off. Mine smokes a little when first starts but think its more white or grey.
rbargeron
Elite Member
Black smoke is usually just unburned fuel. Some amount of black smoke is normal, especially at cold start and also later under max load. Ag diesels automatically set the fuel rich for starting. They don't really cut back until the revs get up a little - so there is some unburned fuel to get rid of - hence the black smoke. After warmup, when the engine is under increasing load, the pump increases the fuel delivery to the point some is not burned (appears as black smoke) - time to select a lower gear or back off the lever. If you are noticing that it seems to smoke black all the time, that isn't normal and the diesel pump might need adjusting.
The diesel pump has stops on both ends for setting the max and min fuel flow - one rule of thumb is to set the max stop where the exhaust just starts to put out black puffs at say 2500 rpm and full power (like going uphill on a road in high gear). Any more pump stroke than this just wastes fuel because the engine can't use it. It's a bit trial-and-error, but pretty easy to home in on the right amount.
On tractor this new, any injector system adjustment should be done by the dealer. That way the information gets passed back up the organization that adjustment was needed on a new unit. Also, the stops are under sealed covers - to prevent goofballs (like me) from adjusting them. I once got a few more hp out of my Kubota by adjusting the high end stop - it wasn't making any smoke so I knew it had some power still available.
As always, prompt cheerful refund if info is bogus. (like if the new M series fuels itself by telepathy instead of a variable-stroke piston pump) Take care, Dick B
The diesel pump has stops on both ends for setting the max and min fuel flow - one rule of thumb is to set the max stop where the exhaust just starts to put out black puffs at say 2500 rpm and full power (like going uphill on a road in high gear). Any more pump stroke than this just wastes fuel because the engine can't use it. It's a bit trial-and-error, but pretty easy to home in on the right amount.
On tractor this new, any injector system adjustment should be done by the dealer. That way the information gets passed back up the organization that adjustment was needed on a new unit. Also, the stops are under sealed covers - to prevent goofballs (like me) from adjusting them. I once got a few more hp out of my Kubota by adjusting the high end stop - it wasn't making any smoke so I knew it had some power still available.
As always, prompt cheerful refund if info is bogus. (like if the new M series fuels itself by telepathy instead of a variable-stroke piston pump) Take care, Dick B
bigdeer2000
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castrol super clean works great on all degreasing or very dirty items just spray on and rinse off.
