Kubota D905B 1st time fire up

[rodbuilder]

I have a Bobcat 533 with a D905B 3 cylinder Kubota in it, that hasn't been started in several years.

We took off the injectors, air filter and fuel filter and cleaned out all the lines by cleaning the injectors with brake cleaner and pumping in new fuel and installing new fuel hoses and o-rings on the fuel rail, but are now having trouble getting any fuel out of the injector lines when we turn over the engine. No "squirt", in other words.

The transfer pump is putting out what I would call a big dribble of fuel. In so far is this IS a small diesel I'm not too sure on how much it should flow but not much is coming out of it when cranking it over with the starter. I tried to find a small electric pump for it, but everything I saw in the auto parts stores has 3/8 lines on them and I need 5/16, so I'm back to using the factory one.

We removed the injector lines at the top of the injection pump, but still no real output from it.

I used to be an engine builder but this is only the 2nd diesel I have dry-fired. A local injection pump shop told me he hasn't seen very many Kubotas that broke a shaft and he thought some part in it might be stuck - a fuel shaft or something???? I don't remember. He also said that with the injector lines off the pump we should see fuel squirting 1 - 1 1/2 inches high, but it's not.

Give me a place to look. Take me though some steps. I'm out of options!!!

HELP!!!! And thanks!!!

 

[North Idaho Wolfman]

Would also need a picture of this engine, mainly the Injection pump area, as there is several versions of the stop solenoid, some are passive and some are active.
Have you powered the stop solenoid?
Without powering it you will get nothing out of the injection pump on one of the versions.

 

[rodbuilder]

Don't you mean fuel shut-off solenoid? There isn't one. It's been replaced by a cable, which is what should have been used in the first place!

There is an arrow on the pump for the correct lever position and we have it where it belongs - towards the front of the Bobcat, or "RUN".

I'm going to replace that crappy stock fuel pump with an electric one as soon as I can find one with the right diameter inlet and outlets on it.

Yanmar makes one and I'm going to call our New Holland dealer tomorrow, hoping they're open. God I HATE holidays!!!

My next option is a lawnmower dealer.

I figure it this way - the thing needs fuel to run, so I've got to get it to the injection pump first. What I have now is a pump that's pushing enough fuel out of it to drown a small bumble bee.....MAYBE! Then I'm going to chase the problem from there.

But the reason I came here is to see if someone knew what might be wrong INSIDE the injector pump that would keep it from doing it's job? From looking at this thing on YouTube this pump looks pretty simple. How complex can this thing be when it's only 2x5 inches???

Do you know what my pump guy was talking about when he said something inside it might be "hanging up"?

 

[Tooljunkie]

Another thing, how does it turn over? Slow? Like its dragging? Could be turning too slow.

 

[North Idaho Wolfman]

But the reason I came here is to see if someone knew what might be wrong INSIDE the injector pump that would keep it from doing it's job? From looking at this thing on YouTube this pump looks pretty simple. How complex can this thing be when it's only 2x5 inches???

Do you know what my pump guy was talking about when he said something inside it might be "hanging up"?

Yes even with yelling at us, I can tell you the pump is probably gelled up and the rack will not let the delivery pumps turn and open, and or all the internal ports are gelled and plugged.
And to answer the question how complicated is the injection pump, it's probably the most complicated part in that engine.

Force feeding fuel with a pressure pump into the injection pump will do nothing except blow the seals out of the injection pump, bad option!

To test the injection pump one would gravity feed fuel into the injection pump from above the pump, if it doesn't pass fuel it will need the injection pump rebuilt.