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1370 case sluggish black smoke seems lacking power

E

EricksonFarms

New User
I have a yellow 1370 case, 504 motor, seems to be lacking power a bit. I've cleaned the bowl out several times because of sludge build up and just switched both fuel filters. Blew the outer air filter out the best I could the inner one looked pretty clean. It black smokes when throttling up and under load but doesn't at an idle. I cracked each injection line coming out of the pump because I thought it was missing but each one seemed to be firing as I heard each one miss when I seen diesel leak out instead of going to the injector. I did flutter when it was running about 1500rpm but doesn't do it anymore which is leaning me towards injection pump issues. It does have a crack in the exhausted manifold but I'm not thinking that's 100% the issue. We have several 504 motors in 13 24 and 2670s and I know ALOT about them just not ALOT about the injection pump on them. Any advise of something I could look at or check would be appreciated thanks!
 
Well a cracked exhaust manifold is going to affect Turbo performance for sure.
Take the inlet tube off the turbo from air cleaner, and see if compressor impeller is not damaged, spins
freely, and there is no wobble in turbo shaft. Then fire it up and see what it does not drawing air from
the air cleaner. Since it is a Desert Sunset one , It does not have strato tube air induction that could
plug up.
Loren
 
First check the COMPLETE air system, turbocharged engines are over fueled and NEED extra air to completely burn the extra fuel under load. Starving for air, or a failed turbo engine WILL smoke heavily, black smoke means you have plenty of fuel but not burning it. Had a customer years ago with a 2670, complaining of heavy smoke, low power, and engine running hot. I told him to put in a boost gauge on the intake and see what the boost pressure was under load, should be about 15 PSI and I suspected a failed turbo. He didn't want to hear that, but when it showed less than 4 PSI a new turbo was installed and all was well again. Power came back, heat and smoke problems went away too..
 

I use the tractor to feed with so it will be a little while before I can dig into it deeply, I can hear the turbo and it sounds normal compared to all the other 504s I've heard but I will take off the air inlet and see, we haven't had one flutter at higher rpms like this one use to too (doesnt do it anymore since it's running sluggish now but did when it ran like it should) like I said it kind of sounds like it is missing but it's not, would dirty injectors cause this issue? I'm pretty sure the flutter is caused by the injection pump so maybe it's the cause of all the issue I'm just not that familiar with the actual pumps to know whats correct and what isn't, we never had an issue with them before until now.
 
Both early pencil injectors and late Bosch injectors have four hole tips, it's possible one or more injector has one or two holes plugged, and that will cause excess smoke and loss of power too, but not that common. The flutter can be cab mounts, and/or injection pump worn plunger control sleeves, or governor settings. Had a 1370 last summer on the dyno owner complained of surging when at high speed light load. It pulled much more than rated on the dyno so it was set back some, and the governor sensitivity re-set to stop the surging complaint.
 
Had a buddy with a 1370 with the same symptoms it was a rat nest of grass and leaves in the air
cleaner intake
 
If it has air to air it could be a bad charge air cooler or a bad hose connection. I had a turbo on my truck was not getting boost so checked the boots 2 were bad. then checked charge air cooler it was good still no boost. Cat with a million miles so changed the turbo. to look at it didn't look bad to me. Sure was though as after change would go back to a boost of about 30 before would only get about 10.
 
I saw an engine come off a new combine and be dismantled because it was smoking and had no power. Turned out there was a plug missing from the bottom side of the intake manifold. Being turbo'd at least it wasn't sucking in dirt!
 

I switch fuel filters last night and this morning it seemed to be worse, I could pull much over 1500 rpm down the road with a full feed wagon and it was just smoking, I took the outer air filter out when I opened the gate seemed to maybe help a bit, then when I got home I took the inner one out and started it, it still blows smoke when I rev it up but I don't dare to drive it around with a filter to see how she pulls, I did put the inner filter back on while it was running and it sucked it down tight, it took a little bit of work to break the suction lose to pull it back off while running so I'm thinking that it's nothing in the pipe after the air filter to have that much suction what are your guys thoughts? Thanks
 
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