Major Diesel major problem

[Anonymous-0]

I recently bought a Major Diesel, and it wont run. Its getting fuel through the fuel pump, through the filter, into the injector pump, but wont pump through the top of the injector pump. The pieces on top of the injector pump where the fuel lines exit to go to the engine dont allow fuel to pass through. If you take them out along with their respective springs etc, fuel will flow from the pump out the open hole, place them back in, fuel wont flow. Is the injector pump not putting enough pressure to move the springs to allow fuel to flow out, or is the main fuel pump too weak to pressurize the injector pump enough. Also, if it is the main fuel pump, I saw pumps for the Fordson Major listed on this sites store, its the pump with the glass bowl on top. Is it for gasoline majors, or does it work for diesels too? Thanks for the help, Greyson

 

[Anonymous-0]

I cant imagine your fuel lines are clogged from the injector pump to the injectors. It is my guess that either the little plungers behind the side plate are stuck in the "up" position, or the little pistons in the injector pump maybe worn badly or scored up, not allowing pressure to build up and pump into the injectors. Take the side plate off "in a garage or something" so that dust does not blow into the injector pump, and look to see if one or more of the 4 plungers is stuck "up" and not coming back down. Both of these are just strong guesses, but majorman will know for sure. Both of these guesses also apply to a "Simms" pneumatic governed Inj pump. This pump has 2 steel lines going from the throttle valve area to the end of the Inj pump. Hope that helps!

 

[Anonymous-0]

If you have already taken the top off you could have permanently damaged the components in the pump. The conditions required to work on pumps and injectors are similar to a operating theatre and the tools required are just as important.

Water vapour and dust as small as 1 micron (1/1000th of a milimetre) is fatal and the damage can be caused in seconds. Personally I would not want to have my appendix removed by a janitor with a bowie knife on the hospital car park :0)!

Please remember I am trying to save you money when I say this, as I have seen people cost themselves hundreds of £'s ($'s)by trying to work on pumps and injectors themselves.

These parts work at pressures of over 2700 psi so the slightest mark on any component will allow diesel under that sort of pressure, to leak past.

However, I would agree with Davey that your rack that moves the pumping elements to increase the fuel to the injectors, is stuck. This will require moving from side to side with a screw driver. With the side plate off, work the stop control and see if it moves. If you have a vacuum governed pump you may have to remove the stop control housing at the back of the pump and free off things in there.

Hope all goes well!