Oil & Fuel Kubota L4600 ran it out of diesel, emptied fuel filter bowl... won't start...

[Ed ke6bnl]

On most diesels I will crack open all the lines at the injectors OPEN THROTTLE and crank till I see fuel coming out of the injector line. I like to close them while this is happening (sometimes it will start then) then close them all up and start it (here goes the haters) then a light spray of either. Your tractor though, do as you see fit.

 

[thepumpguysc]

Yes, the arrow is pointing to the lines..BUT..your pointing to the PUMP SIDE of the line.. YOU DO NOT loosen them there EVER, unless removing the pump..
Loosen them AT THE INJECTORS.. ALL AT ONCE..

 

[glenintenn]

Yes, the arrow is pointing to the lines..BUT..your pointing to the PUMP SIDE of the line.. YOU DO NOT loosen them there EVER, unless removing the pump..
Loosen them AT THE INJECTORS.. ALL AT ONCE..

OK. so you're saying I had it reversed. Just asking for ultimate clarification because multiple folks are saying it's do or die on one nut versus the other.

 

[thclimer]

Attached is the bleeding procedure for my TC33D. I think most diesels are similar in that you want to open/crack a fuel line as close to the injector as possible so that once everything is tightened back up fuel can then be sprayed by the injector, see pictures.

Let us know what you find.

 

[thepumpguysc]

Yes Glen, u loosen the lines AT THE INJECTORS..
Never at the pump..
U stand a better than average chance in loosening the top nut(delivery valve holder) on the pump and losing the seal..
The torque on the top nut IS CRITICAL to the operation of the pump..
That’s why I joined this site, there was SO MUCH bad information being passed around that it was doing more harm than good..
And I see I have more work to do.. lol

 

[glenintenn]

Yes Glen, u loosen the lines AT THE INJECTORS..
Never at the pump..
U stand a better than average chance in loosening the top nut(delivery valve holder) on the pump and losing the seal..
The torque on the top nut IS CRITICAL to the operation of the pump..
That’s why I joined this site, there was SO MUCH bad information being passed around that it was doing more harm than good..
And I see I have more work to do.. lol

Well, never to be shy in asking dumb questions... this entire assembly at the bottom of the diagram you were referencing up above is the "injector pump assembly" (020 in this diagram below, red square. no further parts explosion that I can find for that injector assembly) ... is that the fuel pump you're referring to?

This is why I've been confused by "loosen the lines at the injectors" but... "never at the pump". The injectors appear to be "in" the pump assembly then the "Injection Pipe" ( 050 on the diagram above which you commented on) is screwed onto the injector.

Sorry for my slow learning here. I'm a newb disciple of Orange.

 

[thepumpguysc]

The injectors are screwed into the head..w a leak-off line running between them.

 

[thclimer]

Your L4600 looks to have 4 injectors (see crude labeling below). One at a time, open each of the 4-nuts and crank until fuel comes out then tighten and proceed to the next nut, open until fuel flows then tighten, once all 4 have been bled it should start.

 

[jshwhite]

I've dealt with this on a couple of Kubotas. I'm surprised the bleeder valve didn't work. Usually it will fire right up when you do that, but if they're really dry it can take some cranking.

Bleeding the injectors is pretty simple though. Follow thclimer's steps.

Your L4600 looks to have 4 injectors (see crude labeling below). One at a time, open each of the 4-nuts and crank until fuel comes out, then proceed to the next nut, once all 4 have been bled it should start.


View attachment 746606

 

[thepumpguysc]

Again, open them ALL UP AT ONCE..stop cranking the engine once they all start spitting fuel and tighten the steel lines