fuel pump

Sounds like the barrel & plunger are stuck in fuel injection pump (there is no user fix for this). Can you rev the engine up and down?

If you can rev the engine up and down then the rack is not stuck, but if you are still getting white exhaust smoke and the engine is (or isn't) missing, the timing is off on the #1 barrel & plunger (individual pump). At this point a pic of your injection pump would be handy. Some barrel assemblies are adjustable from the outside but still cannot be calibrated accurately without a test stand.

Stephan, I would try bleeding system again, pump up the hand pump on side of injection pump and hold down while opening the screw just below the hard lines on injection pump, after the hand pump that you are holding down goes down, close the screw off and pump up hand pump again and repeat the process until pure fuel runs out. I am a little confused about your bleeding process.

Phillip

http://www.circlegtractorparts.com

“I have inverted 2 injectors to make a test this morning and the front cylinder injector works perfectly on cyl 2 but make nothing on cyl 1 pure fuel are coming (maybe without enough pressure )”

Sorry, but I don't understand.

If I understand correctly, you swapped the #1 and #2 injectors and the #1 cylinder doesn't fire with either injector, right?  You say you are getting “raw” fuel from the injector in the #1 position, which indicates to me that the #1 pump in the injector pump assembly is faulty and not delivering sufficient pressure to atomize the fuel.  You should get an atomized spray of fuel from the injector, not a stream or spurt.

In short, if I have things understood correctly, you need your injector pump rebuilt (if even possible, which I doubt) or replaced.  Check with Tommy at Affordable Tractor Sales or Ronald at RanchHand Supply for a new injector pump.

If you do have to replace the pump, be absolutely sure that every other aspect of the entire fuel system from the tank to the injectors themselves is absolutely clean and free of moisture or diesel bugs.  If you put in a new pump and still have water or diesel bugs, you'll soon ruin the new pump, too.

Rich:

“If I understand correctly, you swapped the #1 and #2 injectors and the #1 cylinder doesn't fire with either injector, right?  You say you are getting “raw” fuel from the injector in the #1 position, which indicates to me that the #1 pump in the injector pump assembly is faulty and not delivering sufficient pressure to atomize the fuel.”

If this is the case then my earlier diagnosis is validated. The plunger in #1 barrel isn't getting full stroke or the helix is out of time (calibration). However, the symptoms described depict a dribbling injector that isn't popping at all, almost like the pintle spring is broken (which is not uncommon), but that doesn't transfer from injector to injector.

Stephan,

You can't get rebuild kits for these pumps as far as I know.  You just buy a new one and replace it. 

Any good diesel mechanic should be able to time the injection pump through the procedure of “spill timing”, which is a standard technique used on all sorts of diesels.  If your mechanic doesn't know about spill timing it may be time to look for a different mechanic.  The initial pump timing specification is listed in the engine manual that should have come with the tractor.  If you don't have the manual you can order one when you order the injection pump. 

I'm surprised that your 2011 tractor doesn't have a spin-on fuel filter – my 2007 has one.  You can easily add one, just order one from a marine supply to get one that is better built than most.

Rebuild kits or internal parts are not available for MOST fuel injection pumps period, unless to an authorized dealer (there are licensing agreements on this stuff that would make your head spin). Even if you could get internal parts, you still wouldn't have the equipment to set the timing and calibration on each individual pump to the governor. Generally, only specialized diesel shops will have this equipment due to the high capital investment ($30k+). A self-taught diesel mechanic that primarily does overhauls, top ends & tune ups won't necessairly know about the spill-timing method, but there is enough info on the web about it.

Merry Christmas and a Happy New Year to you too Stephan, and good luck.

“The tractor have a spin on fuel filter between the pump and the tank only to filter the unusued fuel return to the tank…”

Are you sure of that? The spin-on filter is usually the secondary filter which is located between the lift pump and the fuel injection pump. There is no primary filter per se, only the screen in the sediment bowl, and the small screen in the lift pump suction banjo bolt fitting. The return fuel to the tank from the fuel injection pump is not filtered.

I never would have guessed that from the symtoms you described, but glad you got it repaired and you're up and running again.

Merry Christmas!