Question for Dieseltech

[Ricey06]

A friend bought a gen-set with a Kabota Model V1305, S# XL1785. Can't get it to run. He works on some gas engines and I am more an electrical person, neither diesel mechs. We have power to the fuel pump. We have good flow through the pump, the filter and to the breather screw(bolt) at the injector. Nothing is coming out of the injector, either at the injector out or the glow plugs? Side note, the unit HAD a panel with all the senser lights. I think it had either an 8 or 10 pin harness which all the wires where cut? Is there something we are missing( bypass a senser or two) or something else we should be testing? Thanks Jeff

 

[used red MN]

We have power to the fuel pump. We have good flow through the pump, the filter and to the breather screw(bolt) at the injector.

Some of your terminology is a bit confusing. By “Injector” you must mean the “injection pump”? “Injectors” are the individual units for each cylinder on the cylinder head that the individual injector lines attach to. The injection pump only supplies pressurized pulses of fuel to the injectors when the cylinder is going to fire. This only takes place when the engine is turning. Are you getting pulses of fuel out of the injector lines when cranking the engine? If so loosen the lines at the injectors and give them a tap with a wrench so they unseat. Then crank the engine to bleed out the air. When you are getting mostly solid spurts of fuel and no air tighten them again. The engine should start then. FYI: beware of highly pressurized fuel being released keep hands and body parts away, fuel can be injected into your skin.

 

[Ricey06]

Sorry about the confusing terminology, like I said, I am not a mechanic. We first tried to loosen the injector line at cylinder #1 and cranked it over after the 30 second glowplug cycle. No fuel came through the line. We than loosened the same line coming out of the injection pump, still no flow while cranking the starter. That is when we loosened the " bleeder plug" and had nice flow into the injection pump. Tried at cylinder #1 again, still nothing?

 

[SkipperII]

Does it have a manual fuel shut off at the injection pump or manual, it may simply be in the shut down position. If it has a shut off solenoid, you may simoly need to supply 12 volts to the solenoid wire.

 

[used red MN]

Sorry about the confusing terminology, like I said, I am not a mechanic. We first tried to loosen the injector line at cylinder #1 and cranked it over after the 30 second glowplug cycle. No fuel came through the line. We than loosened the same line coming out of the injection pump, still no flow while cranking the starter. That is when we loosened the " bleeder plug" and had nice flow into the injection pump. Tried at cylinder #1 again, still nothing?

Some pumps are inherently hard to bleed the air out of, DT or others would have to chime in on that. When you say you have power to the fuel pump that mean the “injection pump”? If so do you hear a click or any sound when power is applied? How long has the genny been out of operation? Anymore with this low sulfur diesel that lacks some of the lubrication qualities of older fuels critical parts in pumps can become stuck, which prevents them from operating as in pumping fuel. This can happen in 6 months or less of non use.

 

[Tramway Guy]

Some Kubota engines have an energize-to-shut-off setup that pulls a lever with a solenoid for a short period of time using a timing relay when the key/switch is turned off. So the lever may be stuck in the off postion. Could be stuck on off position regardless.

 

[used red MN]

Some Kubota engines have an energize-to-shut-off setup that pulls a lever with a solenoid for a short period of time using a timing relay when the key/switch is turned off. So the lever may be stuck in the off postion. Could be stuck on off position regardless.

When I search that Kubota engine model what comes back is in this link. Mfg’s Kabota V1305 engine info If this is what his engine looks like nothing appears to be connected to the manual fuel shut off lever. It shows another solenoid/switch that looks to be mounted directly on the pump. It’s up to the OP to verify if this matches what he has.

 

[Powered By IH]

Some pumps are inherently hard to bleed the air out of, DT or others would have to chime in on that. When you say you have power to the fuel pump that mean the “injection pump”? If so do you hear a click or any sound when power is applied? How long has the genny been out of operation? Anymore with this low sulfur diesel that lacks some of the lubrication qualities of older fuels critical parts in pumps can become stuck, which prevents them from operating as in pumping fuel. This can happen in 6 months or less of non use.

One of my co-workers at my old job was able to take off the top part of the IP and soak it with gas and it would unstick the plungers and everything would work again. I got the basics of how he does it BUT I would not really recommend doing it unless you know what you're doing, or have somebody experienced helping you.

 

[Powered By IH]

Mfg’s Kabota V1305 engine info If this is what his engine looks like nothing appears to be connected to the manual fuel shut off lever. It shows another solenoid/switch that looks to be mounted directly on the pump.

That solenoid also actuates the fuel shut-off inside the pump.

 

[Dieseltech]

On glow plug engines I remove ALL the plugs so engine turns easier. Loosen the fuel line nuts one turn at ALL injector inlets then start cranking engine if injection pump is working you should see fuel at ALL the injectors, if not pump might have ONE or MORE plungers stuck which keeps the rack from moving, and it will need CAREFUL ATTENTION to get it working again. If you DO get fuel at the injectors, tighten the line nuts then crank engine more and you SHOULD see air/fuel mist blow out the glow plug holes. When that happens install the plugs, heat them and start engine.

 

[jhwis]

On glow plug engines I remove ALL the plugs so engine turns easier. Loosen the fuel line nuts one turn at ALL injector inlets then start cranking engine if injection pump is working you should see fuel at ALL the injectors, if not pump might have ONE or MORE plungers stuck which keeps the rack from moving, and it will need CAREFUL ATTENTION to get it working again. If you DO get fuel at the injectors, tighten the line nuts then crank engine more and you SHOULD see air/fuel mist blow out the glow plug holes. When that happens install the plugs, heat them and start engine.

I'm interested in how this turns out. Good info always from DT.

 

[Ricey06]

The picture /link of that engine is very close to the looks of my friends. Add a spin-on fuel filter and arrange that fuel solenoid slightly back? I thought that the solenoid with the arm attached was a fuel pump. When the 12v are applied to solenoid , the arm moves and fuel flows to the injection pump intake. Dieseltech, I will relay your suggestion( and all the info from everyone else) to my friend and report back with the results.
Thanks to All Jeff