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post #1 of 6 Old 06-15-2019, 06:02 PM Thread Starter
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Ford 3000, Injection Pump

Been helping a buddy of mine with his Ford 3000 diesel, been having issues with Simms injection pump, mainly leaks.
First it started leaking out of what I've read to be a vent/overdflow, on the back end of the pump, leak seemed to come and go.
Had it running again today, and fuel started pouring out of the "hooded" vent, circled in red.
I'm assuming the pump needs rebuilt/replaced? I'm quite confident I could rebuild it, unless it needs some very specialized tools. New pump is not in the buget.


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post #2 of 6 Old 06-15-2019, 07:35 PM
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Re: Ford 3000, Injection Pump

Is that piece circled on the injection pump or the lift pump? Something some have done on a 12V Cummins injection pump when they might start a leak is to mix some oil in the fuel to give the injection pump some lube. Helps lubricate seals that start leaking, doesn't cost much to try before trying to repair it.
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post #3 of 6 Old 06-15-2019, 10:32 PM Thread Starter
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Re: Ford 3000, Injection Pump

Quote:
Originally Posted by 9297oldram View Post
Is that piece circled on the injection pump or the lift pump? Something some have done on a 12V Cummins injection pump when they might start a leak is to mix some oil in the fuel to give the injection pump some lube. Helps lubricate seals that start leaking, doesn't cost much to try before trying to repair it.
It's on the injection pump. I think it's to far gone to be saved, steady gushing of fuel out of that vent.

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post #4 of 6 Old 06-23-2019, 08:28 PM
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Re: Ford 3000, Injection Pump

The Simms pump has an oil reservoir that is used to lubricate the pump. Some folks don't realize that and never change the oil and it gets contaminated with fuel and the pump does not receive the proper lubrication, and then things begin to go south. The oil in the pump should be changed every time that you change the oil in the engine, and using the same oil that you put in the crankcase.

A full rebuild of the pump requires specialized tools to test the pressures at various points and to set the timing, as well as specialized knowledge. If you are merely replacing some of the seals that can be accessed without complete disassembly of the pump, then you could probably do it yourself, but anything more and I would recommend taking the pump to a diesel pump specialist. Make sure that you follow the instructions in the service manual when you remove the pump so that things will be timed properly when you go to re-install it. And make sure that you don't turn the engine at all while the pump is not installed.

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post #5 of 6 Old 09-01-2019, 05:59 PM Thread Starter
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Re: Ford 3000, Injection Pump

Update on this issue:
Bought a gasket/seal kit off Ebay, and took the pump off and apart, I left the fuel screw and the adjustments on the rack alone.
The reason fuel was coming out of the vent, is that the oil reservoir was overfilled with fuel. I think because of a cracked diaphragm in the lift pump.
I marked the pump position well before removal, so I think we'll be alright. But I also found how to time it online, so I might also verify it's correct after I reinstall the pump.
Just waiting on a new lift pump as of right now.


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post #6 of 6 Old 09-08-2019, 07:35 PM Thread Starter
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Re: Ford 3000, Injection Pump

Pump is on, new lift pump is on, tractor runs.
Time will tell if the oil in the pump quickly fills with diesel or not.


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