[rockinfarmboy]

I have a 2001 NewHolland TR99. Recently when I go to start the engine, it'll start, run for about 10-15 seconds and then chokes off and dies. At first I thought I had a faulty shut off solenoid and took it to be tested and it was ok. I also have had a new fuel filter installed last fall. Everytime I try starting it again I end up having to pump the primer pump because the fuel is not there. The last time I tried to to start it, I tried to prime it again, but now I'm getting no fuel suction with the primer pump. The fuel tank is over 3/4 full and is fresh fuel. So now I'm trying to figure out if this sounds like a failure of the lift pump or a failure in the injection pump itself. Last fall the engine started hunting and I had a mechanic adjust it and the hunting stopped...but I also wonder if this is something that may have made this situation occour. I would appreciate any info from anyone having the same sort of problem. Thanks...

 

[yellow]

if you have vacume in the line there must a blockage from the tank to the pump. I have seen where old fuel line collapsed inside and you couldnt see it.

 

[gilby]

Where is the fuel tank mounted on the TR.
I had the same problem on our 2001 TF78, it started out the same as your problem and then I had to prime the fuel to start it, and in the end the combine just stooped dead in the middle of the paddock.
The fuel tank on the TF is mounted in the back of the combine and sits pretty much above the sieves (where the straw walkers would be).
Anyway my problem was caused by some trash that had made its home on top of the fuel tank mainly around where the fuel line exits the tank. Over time the trash collected moisture and rusted the fuel line where it leaves the tank, and over time the rust fell off the fuel line and created holes in the fuel line causing it to suck the air.
It took a bit of time to get the fuel line out but when it was fixed it ran as good as after that.
So that is why I was asking where the fuel tank sits as it might have a similar problem.

 

[wetfoot]

I had 2001 99 and it did the same thing what we found was silicone in the fuel line right before the filter body. They used silicone to seal where the intake goes into the tank and somebody got carryed away with it in the factory we ended up having to clear the line 2 or 3 times over the years we owned it.

 

[cnh007]

I used to work for a NH dealer we had this similar problem on a TR98 and the problem was the filter head housing has a check valve in it and the combine would loose prime all the time. I believe with that one we ended up changing the filter housing and the primer assembly but that was a few years back. I am not garanteeing this is the problem but it could be a possibility.

Just my 2 cents

 

[rockinfarmboy]

Well through a process of elimination and a call to my local dealer I have discovered the problem does lie in the fuel line from the tank to the filter. I ended up pumping air with a compressor into the fill spout of the tank and nothing was forced out through the fuel line...the tank just creaked from it being forced full. I then put air pressure in the fuel line from the filter to the tank...it took air in and pressurised the tank...but still nothing came out. I open the filler cap and air gushed out. So now it sounds like the line inside the tank is collapsing. My question now is, how do you get to the line in the tank? The New Holland parts catalogue shows no such line inside the tank. Does this mean I can only solve the problem by replacing the whole tank??

 

[rockinfarmboy]

Ok...have determined the line from the top of the tank to the filter is wide open, as is all other lines from the filter onward. I put pressured air down the suction line and it fills up the tank with air, but nothing flows back out the suction line...when I remove the fuel cap that's when the air rushes out. So it seems the line inside the tank is the calprit. It appears to be a copper line...does anyone know if it can be removed in any way, or if it has a filtering screen on the bottom of it?

 

[rockinfarmboy]

By the way, thanks to everyone who has commented....it's been a big help in narrowing things down!!

 

[gilby]

Are you able to get to where the lines go into the tank.
On the TF where the lines (suction and return) go into the tank they go through a disc that is bolted to the tank. If you undo the bolts that secure the disc to the tank you should be able to remove the fuel lines from the tank.
The disc on the TF also has the fuel tank level sensor attached to it so I had to unclip the two wires from it also before I removed it.
Having never worked on the TR (as they never came to New Zealand) I would not know if it has the same set up, and I have never seen a screen on the end of the line in the tank before but that is not to say the TR is the same either.
Cheers Lindsay.

 

[ausfarmer]

We had a TR99 (2001) that was having the same sort of thing as yours, start up and run for 10 or 15 seconds and then stop. I had not said anything until talking to Dad tonight to help jog my memory as it was when the combine was still new and it is long gone now. The primer/ lift pump was letting the fuel drop back down the line it seemed and the dealer replaced the pump but if my memory is right we still had some problems. Dad also thinks that the dealer put an electric fuel pump near the tank and after that there was never a problem.
Hope this may be of some use.

 

[06max]

Have seen this on several tr 98's and 99's, Sometimes the line was cracked and bad from tank to filter housing, have had a few leaking tanks that we soldered, but never a bad stand pipe in tank. Most all of the time it was the check valves in the lift pump (or something wrong with filter housing,) which is probably what your problem is, sometimes they don't start at all until you blow through the tank for a long time. Sometimes they act like yours and run then quit when filter is empty. All i have done to fix most all of them is install a check valve either at the filter housing or at the line out the top of the tank where you can unbolt that small sheetmetal piece to get to the sender.-thats the best way. Also a check valve for return on pump from new holland. Install a check valve and get primed and it will run.