Clean fuel for my rebuilt injection pump

I bought the Mitsubishi d4000. Took off the injection system and took it to the shop yesterday. They called me back and gave me an estimate and said the injector had water in it. Tech said the water more than likely was casing the runaway problem. It will be ready midweek. Hopefully that will solve the problem.

The existing fuel tank is metal with a strainer where fuel enters the tank. There is a fuel line that goes directly into the injection pump. It was that way from the factory.

Fuel then leaves the injection pump to a fuel filter then back into the pump. The fuel filter bowl is not glass so a visual is not possible.

What do I need to do to insure the fuel is pristine to protect my injection pump?

You need to get a manual.. I am certain you are all wrong , yes there is a line from the tank to the
pump but that is the RETURN line, the supply line should come from the tank to the filter then on to
the INLET side of the injector pump./ What did you take to the pump shop the injector pump or an
injector?

jm. is right, you need a manual to help figure out the fuel system piping. Some systems go from the tank to filter to transfer pump to injector pump. Other systems do go from the tank to transfer pump to the filter then to the injection pump which provides high pressure fuel to the injectors. I see a hand primer pump on your transfer pump so I think yours goes to the transfer pump before it goes to the filter. However I can't say that your hoses are all there or connected properly, especially since you seem to have a loose hose. There is usually some return piping to the tank, for excess fuel, but I can't say on yours, some else may know what and where it is.

To be clear the main injection system components are the injection pump which sends the high pressure fuel to the injectors and the injectors which spray the high pressure fuel into the cylinders. It will help people understand what you are talking about if you learn and use the right names for the components. So if you took the injection system to the shop I would expect you took the injection pump and injectors. I am thinking they told you the injection pump had water in it, not one of the injectors, which you would have had to pull out as well.

The fuel bowl, as you called it, is the fuel filter housing that should have a cartridge type filter element inside it. You need to change that element and clean that housing. If you have water in it, you may need to drain the fuel tank completely and start with new clean fuel. Either way I would recommend getting a couple filter elements and changing it regularly, to protect your fuel system.

(quoted from post at 15:27:29 01/09/20) You need to get a manual.. I am certain you are all wrong , yes there is a line from the tank to the
pump but that is the RETURN line, the supply line should come from the tank to the filter then on to
the INLET side of the injector pump./ What did you take to the pump shop the injector pump or an
injector?

Click to expand...

There is no manual for this Grey Market Tractor. YT is my manual so to speak. There are two lines to my tank. One comes out the bottom of my fuel tank to the pump side. Fuel is then filtered when it is pumped out to the factory attached cartridge filter and returns to injection part. The other line is the return that comes from top of the cylinders.

My injection on technician is ordering a $140 filter to filter fuel as it comes from the tank. He said the Japanese design allowed contaminated diesel into the pump, water and all. The the filter has a 2micro cartridge that is designed for 45 gal an hour. Zero contamination can get through that filter. He suggested so remove and clean my tank to save filters. He suggested I clean up and keep the factory filter as well.

Thanks for the info. as I am new to diesel tractors other than operating them occasionally. It should be out of the shop midweek. I am hoping I didn t throw $ away. I was warned by several I was gambling against a stacked deck!

I was able to put a new sellinoid on my original starter and it is working well.

Thanks JM and Jim I will keep you posted. I am wondering what battery I need to buy? Again I am new to glow plugs and desiel systems

jm is right. you are wrong about that plumbing. Don't start it without getting that sorted out.

(quoted from post at 14:26:26 01/10/20)

jm is right. you are wrong about that plumbing. Don't start it without getting that sorted out.

Click to expand...

To the O.P., nylon supp;y line from tank goes to transfer pump on side of injection pump. Braided hose from transfer pump goes to "outer" area of filter, filtered fuel leaves filter from the central area of the filter, flows through other braided hose to the port on the front of the injection pump.

(quoted from post at 12:33:54 01/10/20)

(quoted from post at 14:26:26 01/10/20)

jm is right. you are wrong about that plumbing. Don't start it without getting that sorted out.

Click to expand...

To the O.P., nylon supp;y line from tank goes to transfer pump on side of injection pump. Braided hose from transfer pump goes to "outer" area of filter, filtered fuel leaves filter from the central area of the filter, flows through other braided hose to the port on the front of the injection pump.

Click to expand...

Thanks, Bob.
You are correct, it has not been tampered with I would bet on it