CorneLauwerijssen

I hope some remember my previous posts about this subject.

Well I have cleaned all filterhousings and installed new filters and
there was a small difference.
Last time it started running badly (sounds like its running at 5 cilinders) at around 1500rpms and knew around 1800rpms after the filterchange,
but when I accelerate slow or fast then it sounds normal, not like running at 5 cilinders.

Its running normal between 800 and 1800rpms, may be a little bit unsteady,
hardly noticeble.

But I supose that the Fuelinjectionpump got some dirt inside, it almost must be when you
see how dirty the filters where. How vulnerable are these pump really against dirt
and water, would a tiny drip of dirt or water destroy the pump or makes it just
badly running. Tommorow Iam going to take the fuellines of to see if theres dirt
inside.

At least I have good oilpressure and temperature. The injectors are good too, we
have pressuretested them.

Thanks in advance,

Corné

devilman96

Wat verbetering!... Sounds like you are moving in the right direction but it sounds like you still have a fuel supply problem.

I would pull the fuel pump out of the tank and check the strainer, clean the pump. I would also pull the tank drain and see if there is water, algae, dirt, etc in the tank. You would hate to ruin you new filters by pumping them full of trash.

How old is your fuel? If it has been sitting for years you may need to add some fresh diesel and or a few liters of lacquer thinner to get it burning well.

Injection pumps can handle a small amount of trash but they do not like water, especially when left idle for extended periods. I would keep trying the small things before trying to blame the injector pump.

CorneLauwerijssen

I forgot to say, but I cleaned the tank before and the strainer was clean.
The fuelpump looked brandnew.
Ive also drained the tank and found no water.

But Iam going further with the small things.

Thanks,

Corné

cranetruck

What color is the exhaust? Any indication that the air filter may be clogged?

Bjorn
Virginia's Blue Ridge Mountains

(Link to PS magazines: http://old.steelsoldiers.com/index.php?name=gallery)

Avatar: XM757 in OK prepared for 1,000 mile trip home. Part of 6,000 mile journey in 2006.
1968 M49A2C modified with 1960 M756A2 truck bed and 1975 HIAB 765A knuckleboom. Heated dual tank system for biodiesel/veggie oil use.
1969 Ford XM757 8x8, 5-ton Pershing 1A truck tractor, the "improved" MV.
"Some things can't be made better, just differently......a lot of things actually"

CorneLauwerijssen

Hi

I cleaned all fuellines with compressed air and diesel, but no dirt came out the
lines. Also took the fuelpump out again and cleaned it with compressed air, although
it was clean but just a double check.

Ive also refilled the tank with new diesel, maybe it had some old diesel in the
tank.

I took it for a one hour testride, but above the 1800rpms its still making trouble.

Could I have the wrong injectors??? They have 2 spray holes.

Aircleaner is clean and it only smokes grey on acceleration.


Corné

CorneLauwerijssen

Any ideas left here on the board??

Well I was thinking of a compressiontest, how much compression should it have?

About the fuel injector pump are these for sale or rebuildable and where to
get parts?? Here in the Netherlands rebuild pumps cost 2500 euros and
sometimes they have takeouts for sale. So Iam thinking to get one
from overseas.

Thanks,
Corné

devilman96

Check the TM section (left of page) you need TM9-2815-210-34-2 and 2-2 It has all of the techinal information on the LDT engines and will have all of the test information you need.

CorneLauwerijssen

Thanks

I will take a look at those pages.

Corné

ken

How many hours are on the engine? Has it had a valve clearence adjustment lately?

CorneLauwerijssen

Hi guys

I will start with the bad news first
During the compressiontest, I saw that one of the injectorfuellines was squirting
some fuel, but not under high pressure like the other 5 did.
I suspect something in the pump is not working like it should


Good news is that the compression was perfect on all cilinders

Anybody have some ideas about the pump, I couldnt find any
specific info in the online manuals.

Corné