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Fordson Tractors Discussion Forum

Re: Fordson Super Dexta Fuel Pump Problem

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Author  [Modern View]

09-29-2013 09:19:24

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You may have a blocked tank filter in the tap, have you taken the feed pipe out of the fuel pump and checked that you have a good flow?

It could also be the valves in the lift pump and you may need a replacement pump.

The throttle needs to be about half open to get the cold start to stay in. Try moving the stop control backwards and forward, this may release the excess fuel (cold start) button, they sometimes stick and this will stop fuel flow to the injectors when trying to start. Try pulling the excess fuel button with a pair of pliers at the same time as you move the stop control.

It is also possible that the rack in the pump has stuck. Clean around the side plate on the pump carefully, then remove the side plate and try moving the rack that moves the delivery valves with a screwdriver.

May be teaching my grandmother to suck eggs, if so, my apologise but you do know that you cannot bleed the injector lines by pumping the primer pump? You can only use that to get air free fuel to the filter and injection pump bleed screws.

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E Morris

09-30-2013 05:27:43

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 Re: Fordson Super Dexta Fuel Pump Problem in reply to Majorman, 09-29-2013 09:19:24  
Hello Majorman
Thank you for your comments re. Fuel Pump Problem.
The flow coming into the pump seems fine (full bore on the inlet pipe from tank).
I'll try your suggestion to loosen the cold start button then have a look at the rack movement.
My feeling is that the lift pump is not working as it should (no pressure when pumping), and yes I do know that you need to crank the engine to get fuel past the injector pump (but in this case no fuel coming through).

Many thanks

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