Yanmar 1510D won't start but cranks

[winston1]

Did you check fuel at all three injectors? Your test would sort of indicate the pump but don't jump at it. Injector pumps are expensive. Stupid question I know, but I'll ask anyway, do you have the throttle wide open? If throttle is closed it won't pump. If the answer to that is yes and you are confident you have followed these bleed procedures Yanmar Tractor Fuel Bleeding Procedure then pulling the pump might the the next step.

I am still wondering about that "popping" sound. #2 on this camshaft drawing are the lobes that operated the injection pump. Certainly hope not and not suggesting it is your problem but just putting another possibility out there.

If you do get to the point of pulling the injector pump you will have to pull the little side inspection plate to give access to unhook the fuel rail from the governor. It is #7 on this drawing. Yanmar Tractor Parts: TIMING_COVER

I would encourage you to make several attempts at fuel filter and properly bleeding the system before moving to other possibilities.

 

[grandmajo]

Throttle was all the way open. We didn't check the last injector, guess we didn't feel the need to do that one since the first and second one that we checked had nothing coming out of them, no air or fuel. We did all of the previous steps for bleeding the lines at the fuel filter and going into the injection pump. Those are good, there is fuel going into the injector pump.

I'm not understanding what you are saying about the lobes that operate the injection pump?

 

[winston1]

Possibility camshaft broke, remote, but there. Still thinking about that "popping" noise.

 

[grandmajo]

Another question....the little plastic fuel bowl that is used for the glow plug....how much fuel should be in that?

 

[winston1]

According to the parts breakdown the 1510 has the resevoir that is fed by injector stem leak by. My 2002d has that same resevoir and it stays full all the time. It overflows into the tank filler neck. As long as the resevoir has any fuel in it it is ok.

 

[grandmajo]

Thank you wintston1. The reservoir on this one is almost empty where it was almost completely full prior to this problem. I have done several attempts at starting it with the glow plug, so I'm assuming that the small amount of fuel that was in there was used during those starts and it's not refilling because of the possible issue with the injection pump.

 

[winston1]

Thank you wintston1. The reservoir on this one is almost empty where it was almost completely full prior to this problem. I have done several attempts at starting it with the glow plug, so I'm assuming that the small amount of fuel that was in there was used during those starts and it's not refilling because of the possible issue with the injection pump.

Sounds logical. :thumbsup: Keep us informed of your findings.

 

[Gunny]

I don't know anything about Yanmars and even less about the Thermo Start system, but is this tractor gravity fed to the injection pump or does it have a fuel pump to push fuel?

 

[California]

Gravity feed to the injector pump inlet. And no fuel shutoff solenoid.

 

[grandmajo]

Update to this: I have a mechanic here right now. He's asking for a drawing of the govenor and a parts list. I can find the drawing on Hoye Tractor's website, but not a parts list. I have a manual, but the parts list is all in Japanese. Does anyone have a link for one in English?